Choke Maintnance

8/10/2019 Choke Maintnance

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P.O. BOX 718

1927 HWY 90 WEST

JENNINGS, LA 70546

P 337.616.3300

F 337.616.3299

" Q U A L I T Y C R E A T E S T R U S T "

MAINTENANCE AND OPERATION MANUAL

HYDRAULIC CHOKE AND CONTROL CONSOLE


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INTRODUCTION

The Quality Oil Tools, Inc. remote operated Hydraulic Choke has been field proven to be areliable choke for the drilling industry. Like all mechanical and pressure containing equipmentthere are certain fundamental rules which operators should observe.

The basic mechanical operation of the QOT Hydraulic Choke is very simple. However, the

applications for which this type of equipment is used may be complex enough to require specifictraining and experience to complete an operation successfully. The QOT Hydraulic Chokeshould be operated by, or under the supervision of qualified operators only.

All mechanical equipment is subject to wear caused by either use or abuse. The QOT HydraulicChoke and Control Console should be inspected on a regular basic by qualified personnel. Anyrepairs should be made before undertaking any operations involving the QOT Hydraulic Choke.

In the event of any problems please contact:

Quality Oil Tools, Inc.

1927 Highway 90 West

P.O.Box 718

Jennings, Louisiana 70546Phone: (337) 616-3300

Fax: (337) 616-3299

Email: [email protected]
mailto:[email protected]:[email protected]


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I. GENERAL INFORMATION

A. CHOKE

The Quality Oil Tools, Inc. Hydraulic Choke is a hydraulically operated valve with anadjustable orifice. In the fully open position the maximum orifice size is 1.9 square inches (12cm2) to complete closed. The orifice size is controlled by means of rotating the 'Front'

(upstream) disc from 00 to 180 while the 'Back' (downstream) disc remains stationary. The'Front' disc is rotated by a hydraulically-driven rotary actuator. The discs, constructed ofTungsten Carbide, are precision ground and lapped to a mirror like finish. (See Figure 1)

Figure 1

The Quality Oil Tools, Inc. Hydraulic Choke was designed primarily to control high pressuregas kicks and various fluid flows during drilling operations but can be used in a variety ofapplications.

B. CONTROL PANEL

The control panel is normally used to operate the QOT Hydraulic Choke from a remotelocation. The panel is portable and may be located at any safe location to satisfy specificneeds or requirements that the customer may have. In cases where more than one panel isrequired to satisfy needs or requirements, additional panels may be added with only minoradjustments to hose and fittings, etc.

Figure 2.

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The control panel is a completely self-contained unit with the exception of an airsupply. The air input requirements are a minimum of30 PSI, however 50-125 PSI withan available 10 cubic ft/min. (CFM) is recommended for maximum performance. Thereare no electrical requirements for the panel or choke. The stroke counter assembly has a6 Volt battery pack located inside the counter box. The battery pack is areplaceable/expendable item that should last approximately 36 months under normal

conditions.Should the air operated hydraulic pump fail, the choke may still be operated by usingthe manual hydraulic pump located on the control panel base. This method of operationwill work only if the remaining hydraulic systems are intact. If air pressure is lost theposition indicator gauge will not work. Should the hydraulic system have a completefailure, provisions have been made for manual choke operation by inserting a bar intothe indicator head. The indicator head features an indicator band so adjustment of theorifice size is still possible.

For multiple choke installations, QOT also offers a Dual Choke Control Console(Figure 3). Two chokes can be operated with this console without the need for anauxiliary panel or two single consoles.

Figure 3

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2. INSTALLATION

A. INSTALLING THE CHOKE

The standard inlet and outlet connections supplied on the QOT Hydraulic Choke are APIType 2-9/16" 10,000 psi WP with a BX-153 ring groove or a 3-1/16" 10,000 psi WP with a BX-154 ring groove.

All Hydraulic Choke assemblies have a series of solid Tungsten Carbide wear sleeves and a flangeprotector. The flange protector when installed extends 1/8" ( 4mm) from the face of the outletflange. This will protect the ring groove and flange from 'washing out'.

NOTE: MAKE SURE THAT THE MATING FLANGE BEING BOLTED TO THEHYDRAULI C CHOKE OUTLET SPOOL DOES NOT INTERFERE WITH THE FLANGEPROTECTOR. TH IS COULD CRUSH THE CARBIDE PARTS INSIDE THE CHOKE.

Always check all bolting studs and nuts for cracks, damages, and wear to threads before installing.Any damaged parts should be replaced.

Always use new gaskets when installing the choke. (Refer to API Specification 6A for Wellheadand Christmas Tree Equipment).

The nuts should be evenly torqued and have full engagement onto the stud. The stud should have 3to 4 threads showing for best results. After torquing the nuts, the flange raised faces should cometogether and be parallel to the companion or adapter flanges.

Whenever possible, two gate or positive sealing valves should be installed upstream of the choke(between the Blowout Preventer and the choke) and one downstream of the choke to permitisolation for maintenance while other sections of the manifold are in use.

When using a flare line from the choke it must be securely anchored according to APISpecifications. (Refer to API Bulletin RP 53).

Whenever the choke is reassembled or installed/reinstalled in the manifold the choke should beretested. Refer to -Section 5- of this manual for test procedure.

B. REPOSITIONING THE ACTUATOR

After installing the Hydraulic Choke assembly in the manifold, it may be necessary to repositionthe hydraulic actuator. The actuator assembly should have the open area facing down or to the sideto facilitate excess water drain -off. Should the actuator assembly not be positioned properly thefollowing procedure should be followed to rotate it to the proper position.

1) Remove the four mounting bolts which attach the Actuator Assembly to themounting bracket.

2) Pull the Actuator Assembly away from the choke body until the square shaft clearsthe Indicator Head.

NOTE: DO NOT ROTATE THE SQUARE SHAFT OR INDICATOR HEAD DURING TH ISOPERATION. DOING SO WILL CHANGE THE ALI GNMENT OF THE DI SC OR CHANGETHE POSITION IND ICATOR AND THE CHOKE WILL NOT FUNCTION PROPERLY;

3) Rotate the entire actuator assembly 90 or 180 to the desired position.

4) Clean and grease the square shaft and push the actuator assembly into the indicatorhead.

5) Install the four bolts removed previously and tighten them to 27 ft-lbs.

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C. HYDRAULIC CONTROL LINES

Connect the two 3/16"3,000 psi hydraulic hoses (with 1/4" Male and Female Couplings) to thechoke control panel and the Hydraulic Choke actuator assembly using the quick disconnects. (SeeFigure 4) They should be placed in such a manner as to prevent damage by sharp edges andhazards for rig personnel.

D. CHOKE POSITION INDICATOR

The panel is equipped with 1/4" O.D. vinyl poly flow tubing. Connect the 1/4" O.D. vinyl tubingfrom the fitting on the position indicator regulator (located inside the actuator box assembly) tothe position indicator gauge (located on the control console face).

1) Layout and cut 1/4" tubing to the desired length.2) Connect the tubing to the rear of the panel labeled "Air to Transmitter" and "Air

Return from Transmitter." Note: Tubing connectors provided on the panel andactuator are a "Push On" type. Simply push the tubing onto the connector and pullback to insure connection. To release: Push the ring into the fitting and pullout thehose.

3) The fittings on the position indicator regulator are not labeled. Check the arrow

located on the position indicator regulator to determine the direction of flow.4) Turn the air supply valve on the control panel to the on position. Operate the chokevalve to the full open position by holding the controls lever in the choke openposition until the pump stalls. The position indicator gauge should show open, ifthe gauge is not calibrated correctly, recalibrate per procedures described inSection 4.8.

NOTE: THE CONTROL P ANEL AND CHOKE VALVE ARE SHIPPED FROM QUALITY OILTOOLS FULLY CALIBRATED.-Push the control lever to the right toward the choke closeposition. The hydraulic pump shouldstart / stroking and the needle of the Position Indicator Gauge should begin moving. Hold thelever in this position until the choke is fully closed and the hydraulic pump stalls; then release the

lever. The control valve lever should return to the center position.

If there are any problems with any of these operations, refer to -Section 6- of this manual.

E. INSTALLING THE CONTROL PANEL

Place the panel in a desired location on the rig floor or in a safe working area designated by thecustomer. Normally, the best location for the Control Console is against the hand rail nearest themud tanks and the choke manifold. This location provides the choke operator with a view of thefluid level in the mud tanks and other equipment related to a well killing operation.

1) AIR SUPPLY

Connect a rig air supply to the rear of the panel. The inlet for the rig air is labeled"Rig Air Supply." (See Figure 5) The air supply should be capable of supplying aconstant moisture-free 50-120 psi of air. Trash or moisture in the air supply cancause a malfunction in the air operated hydraulic pump or in the position indicatorassembly. The air supply should be connected to a source that will not bedisconnected from the panel.

Care should be taken when routing the air supply to avoid damage to the hose bycrimping, cutting or from excessive heat. A hose of diameter should be capableof supplying an adequate amount of air for proper operation up to 50 feet. Should alonger hose be required, a diameter hose is recommended. The panel isequipped with a 1/2"NPT male connection for installing the air supply line.

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2) PUMP STROKE COUNTER

The QOT pump stroke counter is a digital readout type, which is powered by abuilt in battery pack located inside the pump stroke counter box. No externalelectrical power supply is required. The meter comes complete with a 125' limitswitch assembly (magnetic proximity switches optional).

The limit switch assemblies mount to the mud pump frame near the exposedportion of the pump rods so that the pump rod collar or "splash guard" willcontact the limit switch "whisker rod". Mount the limit switch assemblies to thepump frame using the C-Clamp bolted to the switch. There should be one fulldeflection and release of the "whisker rod" for each pump stroke to assure properoperation of the stroke counter and to avoid double counting. Route the cablefrom the switch assembly to the panel so that it will not be cut or damaged.(NOTE: The panel and switch assemblies are pre-wired and no furtherconnections are required.)

Operate the pump stroke counter switch assemblies by hand to determine Pump#1, #2 or #3. There is a pump selector switch located on the bottom of the pumpstroke counter box inside the panel. This switch is used to select the desired pump

stroke count and rate being displayed.

3) GAUGE PROTECTOR

Two gauge protectors have been provided with the panel. Connect the drill pipepressure gauge protector (See Figure 5) assembly to the rig standpipe and thecasing pressure gauge assembly to the choke manifold. Whenever possible mountthe assembly in the upright position with the hammer nut down, this will allowthe mud and drilling fluids to drain from the unit when no pressure is in themanifold Connect the hose from the gauge protector to the drill pipe pressure orcasing pressure gauge on the panel Use caution when running the hose so that itdoes not get cut, crimped, worn, or burned by other equipment.

The gauge protectors are rated for 10,000 psi WP and may be mounted to a 2"Figure 1502 female hammer union hub on the standpipe and choke manifold. Thegauge protector lines should be filled with hydraulic fluid prior to leaving QualityOil Tools. If the lines are not filled see -Section 4.7 .B- of this manual for thehydraulic line filling procedure.

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F. MULTIPLE CHOKE INSTALLATION

Dual Panel

If two QOT Hydraulic Choke valves are used in the manifold, they both may be operatedfrom a Dual QOT control panel. The Dual panel is installed in the same manner as theSingle panel. On the rear of the Dual panel there are OPEN and CLOSE connection ports

for each choke. There are also "air to" and "air return" lines for each choke. It is veryimportant not to interchange the lines from Choke 1 with the lines from Choke 2. It isrecommended to install one set of lines at a time. The OPEN and CLOSE lines for Choke 1and Choke 2 are clearly marked adjacent to the connections.The gauge protector assemblies and supply air are installed in the same manner as a SingleControl Console.

3. OPERATION

The choke discs should remain in the full OPEN position when the choke is not in use.Operation of the QOT Hydraulic Choke should always begin with the choke in the OPENposition. (Closed choke discs may result in hydraulic shock in the well bore and if the mudpumps are running can result in lost returns and a downhole blowout.) For example: at the

start of a well control procedure, the choke e. should not be closed until after the blowoutpreventer has been closed and drilling fluid is flowing through the manifold and HydraulicChoke. This helps to seat the discs and prevents mud particles from getting between thediscs. The choke should be closed slowly to avoid hydraulic shock on the surface pressurecontrol equipment and the casing seat.

A. NORMAL OPERATING METHOD (FAST)

1) Move master AIR SUPPLY valve to the ON position (See Figure 2).

2) Open the HYDRAULIC REGULATOR all the way.3) The Control Console displays the following information that is typically used

in well control procedures.

Drill pipe pressure 0-10,000 psi in 20 psi increments (0-68950 kPa in 138 kPa increments).Casing pressure 0-10,000 psi in 20 psi increments (0-68950 kPa in 138 kPa increments).Choke position (full OPEN to full CLOSE).Mud pumps stroke rate and stroke count.

4) Be prepared to shift the CONTROL LEVER in either direction to maintainthe desired casing or drill pipe pressure.

NOTE:A PLUGGED CHOKE MAY RESULT IN EXCESS PRESSURE BUILD-UP IN THESYSTEM THAT MAY EXCEED THE CASING PRESSURE LIMIT. IN CASE OF CHOKEPLUGGING, SHIFT THE MAIN CONTROL LEVER TO OPEN AND OPEN THEHYDRAULIC REGULATOR FOR FAST RESPONSE AS SOON AS THE PLUG ISCLEARED. THE CONTROL LEVER MUST BE SHIFTED TO CLOSE LONG ENOUGHTO RETURN TO THE DESIRED PRESSURE. THE HYDRAULIC REGULATOR VALVEMAY THEN BE ADJUSTED FOR A SLOWER RESPONSE.

5) When the well control operation is complete, open the choke and turn master AIR SUPPLYvalve OFF to remove all pressure on the hydraulic system.

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B. ALTERNATE OPERATING METHOD (SLOW)

1) If slow operation is desired, close the HYDRAULIC REGULA TOR all theway. Then to adjust the choke disc speed, hold the CONTROL LEVER in theCLOSE position and slowly open the HYDRAULIC REGULATOR valve.This allows only a very slow movement of the choke disc. When the desired

pressure is reached, the CONTROL LEVER should be released.

2) Open the HYDRAULIC REGULATOR valve if a faster response is needed.

C. EMERGENCYOPERATION

1) Failure of air supply to air pump.

a) Install PUMP HANDLE on the HAND PUMP which is mounted on thebase of the Control Console skid. (Be sure pump BLEED-OFF valveon the HAND PUMP is closed).

b) To change choke opening, hold the CONTROL LEVER in the desired

position while stroking the HAND PUMP .2) Rupture in Hydraulic line or connection.

a) If either hydraulic line is cut or ruptures, cut both lines at the choke.The hoses must be cut and NOT DISCONNECTED. If they aredisconnected, check valves in the fittings will prevent operation.

b) Insert 5/8" (16mm) diameter rod into one of the holes in theINDICATOR HEAD (See Figure 5) and manually position the chokeas desired.

Figure 5.

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4. SERVICE AND MAINTENANCE

A. PROCEDURES

1) ROUTINE INSPECTION

The QOT Hydraulic Choke is a key element of the pressure control

system used to prevent rig blowouts. Therefore, it is important that theHydraulic Choke and Control Console be maintained in good operatingcondition at all times (See Figure 6).

Figure 6

2) DAILY VISUAL CHECKS

heck the presence of a hand pump (Item 2 ), a manual choke operatingbar, and all panel labels.

Check fluid level in the hydraulic oil reservoir (Item I ). fill with thecorrect hydraulic oil. Keep a supply of oil at the choke panel or close by.

See that all connections fit tight. Make sure the hydraulic hoses, pumpswitch cable, and air-lines are properly connected and not cut orpinched.

Check the Pump Stroke/Rate Meter (Item 8). Place the selector switchon "TEST". The meter should be counting and should show 128 SPM,Select Pump l or Pump 2 and observe counter and rate display. Resetcounter to zero after test.

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See that the pump stroke counter switches (Item 3 ) are properly attached to the mudpump and counting the correct number of strokes.

3) DAILY OPERATIONAL CHECKS

Turn the master air supply valve (Item 5) on. The hydraulic pressure gauge (Item 12 )should show 1000-1100 psi (6895-7584 kPa).

Close the hydraulic regulator (Item II) and then open I-I/2 turns. Operate the controllever (Item 6 ). Complete a full cycle of the choke discs from full OPEN, to fullCLOSE, back to full OPEN. The position indicator (Item l0) should track the chokedisc movement according to the choke lever selection.

To operate the hand pump (Item 2 ) to close or open the choke discs, shut the airsupply off. Hold the choke control lever in desired position and operate the handpump. Make sure the bleed valve on the hand pump is closed. Leave the pump pistonin the DOWN position to avoid rust or corrosion.

Observe the Drill Pipe and Casing Pressure gauges (Item 7 ). The pressure valueshould be approximately the same as the rig gauges. Gauge faces should be clean andvisible.

4) REMOVING THE QOT HYDRAULIC CHOKE FROM THE MANIFOLD

CAUTION:

BEFORE ATTEMPTING TO WORK ON A ULTRAFLOW CHOKE IN A MANIFOLD,EXTREME CAUTION SHOULD BE EXCERCISED TO ASSURE THAT THERE IS NOPRESSURE TRAPPED IN THE CHOKE VAL YE OR CHOKE MANIFOLD. AL WAYSUSE PROPER SAFETY PRECAUTIONS WHERE H2S GAS MAYBE TRAPPED IN THECHOKE VAL YE OR MANIFOLD. ONLY PERSONNEL WHO HA YE RECEIVEDINSTRUCTION ON THE HAZARDS OF H2S, THE PROPER SAFETY EQUIPMENT AND

PROCEDURES FOR WORKING IN AREAS WHERE H2S MAY BE PRESENT SHOULDBE PERMITED TO WORK ON THE HYDRAULIC CHOKE. FAILURE TO FOLLOWTHESE INSTRUCTIONS COULD RESULT IN INJURY.

Rotate the choke discs to the full OPEN position. Allow the pressure in the chokevalve to be relieved before continuing with this procedure.

Carefully loosen the outlet flange nuts one turn each until seal or ring gasket isbroken but do not remove the nuts on the outlet flanges of the choke valve. After allthe nuts are loosened, break the seal on the ring gasket by separating the outlet flangefrom the manifold flange. Stand on either side of the flange gap, never over it, whenbreaking the seal to avoid possible severe personal injury. Once the seal is broken andall pressure inside the choke is relieved, the nuts and studs may be safely removed.

Do not use a pry bar to remove flange because of possibly damaging the extendedwear sleeve.

Provide some manner of support for the valve then carefully loosen the upstreamflange nuts one turn until seal is broken and any trapped pressure is released, thenremove the nuts and studs on the inlet flange.

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CAUTION:

THE ULTRAFLOW CHOKE IS RATED FOR H2S SERVICE THEREFORE THEMATERIALS USED TO MANUFACTURE THE FLANGES, NUTS, AND STUDS ARERELA TIVEL Y SOFT AND SUBJECT TO SURFACE DISTORTION AND DENTS FROMPOOR WORK PRACTICES. CARE SHOULD BE EXCERCISED IN THE HANDELINGPROCEDURES AND USE OF TOOLS WHEN WORKING ON THE UL TRAFLOWCHOKE TO A VOID DAMAGING THESE PARTS. DAMAGED PARTS WILLADVERSELY AFFECT THE STRUCTURAL INTEGRITY OF THE UL TRAFLOWCHOKE AND MA Y RESULT IN INJURY.

1. Refer to -Section 2.A- of this manual for reinstalling thechoke in the manifold-

5) CHANGING THE DISC ASSEMBLIES

This section describes the procedure for removing the discs from the outlet end of

the valve body for inspection and or replacement and removal of the wear sleeves.CAUTION

BEFORE ATTEMPTING TO WORK ON A ULTRAFLOW CHOKE, EXTREMECAUTION SHOULD BE EXCERCISED TO ASSURE THAT THERE IS NO PRESSURETRAPPED IN THE CHOKE VALVE. AL WAYS USE PROPER SAFETY PRECAUTIONSWHERE H2S GAS MAY BE TRAPPED IN THE CHOKE VALVE. ONLY PERSONNELWHO HA VE RECEIVED INSTRUCITON ON THE HAZARDS OF H2S, THE PROPERSAFETY EQUIPMENT AND PROCEDURES FOR WORKING IN AREAS WHERE H2SMAYBE PRESENT SHOULD BE PERMITTED TO WORK ON THE HYDRAULICCHOKE. FAILURE TO FOLLOW THESE INSTRUCTIONS COULD RESULT ININJURY.

Carefully loosen the outlet-spool bolts on turn each. After all the bolts are loosened,break the o-ring seal and unbolt the outlet spool, carefully separating it from thebody. The spool is fastened to the choke body with 7/8" ferry head cap screws. .

1. To remove the choke discs, first rotate the front disc to the fullOPEN position if this has not been previously done. Wash anysand, grit or weight material from around the exposed portionof the back disc and disc opening.

2. Insert the hook end of the disc puller in the disc opening asillustrated in Figure 6a. and gently remove both discs usingthe sliding weight on the puller.

CAUTION

TO AVOID INJURY, CAUTION SHOULD BE TAKEN TO AVOID GETTING ANY PART OFTHE HAND CAUGHT BETWEEN THE SLIDING WEIGHT AND THE STOP ON THE ENDOF THE PULLER SHAFT.

Maintain the position of the hook on the puller to avoid chipping the corners of the disc orifice.Even if the discs are worn they may be repairable if not damaged from this procedure. When thediscs have been removed, locate and inspect the stationary disc locking pin. Replace if damaged.

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Figure 6a.

3 . Clean both disc assemblies thoroughly and inspect for wear or damage.The primary criteria for determining whether or not the choke discs are

reusable is that they can provide a positive seal under pressure wheninstalled in the choke. See -Section 5.2- of this manual for HydrostaticDisc Test Procedure.

4. Wash out and clean the interior of the choke body and the O-ringsealing surfaces.

5 Remove the O-rings on the back disc carrier and the choke body flangeand replace these O-rings.

CAUTION

THE O-RINGS USED IN THE ULTRAFLOW CHOKE ARE MADE OF A SPECIAL

RESISTANT MATERIAL. USE ONLY O-RINGS SPECIFIED IN PARTS LIST

INCLUDED AT REAR OR THIS MANUAL

6. Thoroughly clean the disc assemblies and apply a light film of siliconegrease to the O-ring groove on the rear disc carrier. Avoid gettinggrease on the polished disc faces because this can cause the choke toleak when tested.

7. Insert the front disc assembly into the body so that the half-moonopening side is facing the choke inlet flange. Be sure that the turningfork fingers and the locating pin in one of the fingers align properly

with the slots and locating pin hole in the front disc assembly. Thefront disc should fit loosely into the body and into the turning forkfingers.

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8. Position the back disc locking pin in the groove on the inside diameterof the choke body. Align the matching pin groove in the back discassembly and insert the back disc. Note: The moon-shaped openingmust be facing the inlet flange of the choke valve. (See Figure 7).

Figure 7

9. To remove the outlet spool wear sleeves carefully press them outthrough the end which bolts to the body. There are three identical largeinternal diameter wear sleeves and one with a smaller opening thatprotects the outlet flange seal.

10. Inspect the wear sleeves for wear and replace as necessary.

11. Before reinserting the wear sleeves, clean and inspect the bore of thespool. Be especially careful to remove any dirt, rust or debris from theshoulder where the extended wear sleeve makes contact. Failure to doso may cause the wear sleeves to break the choke discs when the spoolis bolted to the valve body.

12. Remove any dirt, rust or debris from the ends of the wear sleeves andthe shoulder on the extended wear sleeve. Apply a light film of siliconegrease on the outside of the wear sleeves and insert them into thespool.

13. Reassemble the outlet spool to the valve body using the alignment pinsand the ferry head cap screws. Check to be sure the O-rings areproperly positioned. Use only the screws and bolts specified in PartsListing at rear of this manual to assemble. Discard and replace anydamaged screws. Tighten these screws uniformly. The bolts should be

torqued to 165 Mbs (224 Nm). Over-torquing the bolts will cause themto stretch and reduce their strength which can result in prematurefailure.

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14. Clean and inspect the inlet and outlet flange faces and ring grooves.Apply a light film of general purpose grease or rust inhibitor to the faceand ring groove for corrosion protection.

6) BONNET END DISASSEMBLY

This section describes the procedure for removal of the Actuator Assembly andBonnet from the Choke Valve. It also covers the removal and inspection of the

turning fork. These procedures may be done with the Hydraulic Choke eitherinstalled in the choke manifold or removed.

CAUTION

BEFORE ATTEMPTING TO WORK ON AN HYDRAULIC CHOKE IN A MANIFOLD,EXTREME CAUTION SHOULD BE EXERCISED TO ASSURE THAT THERE IS NOPRESSURE TRAPPED IN THE CHOKE VALVE OR CHOKE MANIFOLD. ALWAYSUSE PROPER SAFETY PRECAUTIONS WHERE H2S GAS MAY BE TRAPPED IN THECHOKE VALVE OR MANIFOLD. ONLY PERSONNEL WHO HAVE RECEIVEDINSTRUCTIONS ON THE HAZARDS OF H2S, THE PROPER SAFETY EQUIPMENT,AND PROCEDURES FOR WOKING IN AREAS WHERE H2S MAY BE PRESENT

SHOULD BE PERMITED TO WORK ON THE HYDRAULIC CHOKE. FAILURE TOFOLLOW THESE INSTRUCTIONS COULD RESULT IN INJURY.

I. The first step in disassembling the Bonnet from the Choke is toremove the Actuator Assembly. Before doing this, position the chokediscs in the full OPEN position. To remove the Actuator Assemblyfrom the Choke Valve, remove the four bolts attaching the adapter tothe Actuator. This exposes the four bolts that attach the adapter tothe Choke Valve. Remove these bolts and proceed to the next step.

2. Remove the cap screw attaching the Indicator Head to the TurningFork. Remove the Indicator Head from the Turning Fork shaft.

3. Before removing the Bonnet, mark the Valve Body and Bonnet sothey can be reassembled with the same orientation. Remove theremaining ferry head cap screw attaching the Bonnet to the body.Inspect these screws for damage or distortion and replace asnecessary. Use only bolts specified in parts list at the rear of thismanual. Remove the Bonnet from the Valve Body.

CAUTION

MOST COMMON BOLTS, STUDS AND NUTS AVAILABLE DO NOT MEET THEREQUIEMENTS FOR H2S SERVICE AND WILL FAIL FROM HYDROGENTEMBRITTLEMENT. REPLACE BOLTS, STUDS AND NUTS WITH AUTHORIZED

REPLACEMENT PARTS.

4. Push the Turning Fork out of the Bonnet being careful not to damagethe shaft surfaces that rotate inside the Bonnet.

5. Clean the Turning Fork and inspect for wear or damage. The ThrustBearing and O-ring seal areas should be smooth. The hex should notbe rounded, cracked or deformed. Replace the Turning Fork if any ofthese conditions exist. Lubricate the Turning Fork shaft with a lightapplication of silicone grease before reassembly.

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6. Replace the Thrust Bearing, Shaft Bushing, all O-rings and backuprings on the Bonnet. The parts that are used in the UltraFlow Chokeare made of special material for exposure to H2S gas. Use only partsspecified in parts list at rear of this manual to replace components inthe Hydraulic Choke.

7. Reinsert the Turning Fork in the Bonnet being careful not to damagethe 0- rings or bushing. The Bonnet should be clean and have a lightapplication of silicone grease on the surfaces where there is contact or

close proximity to the Valve Body and Turning Fork.

8. If the Outlet Spool is not to be removed from the body, the front discassembly must be properly positioned on the turning fork prior toinstallation. Be sure to properly align the locating pin in the TurningFork finger with the alignment hole in the front disc assembly. Thepolished surfaces on both the front and back disc must be completelyclean, dry and free of grease to assure proper seating.

9. Clean the Indicator Head and apply a light film of grease to thesquare and hex sockets. Check that the Indicator Head socket will fitfreely on the Actuator Assembly shaft. This will eliminate problem:;when assembling the Actuator Assembly to the valve.

10. When inserting the Bonnet assembly into the valve body, position thehalf moon opening on the front disc toward the inlet flange and alignthe marks described in Step 3 on the Bonnet and Valve Body.

11. Reinsert and uniformly tighten the bolts securing the Bonnet to theValve Body and the Actuator Assembly to the Bonnet. Note: Four ofthe bolts are longer than the rest. The longer bolts are used to attachthe Actuator Assembly to the Bonnet. The Actuator Assembly may bepositioned in three possible positions, but never up-side down. Careshould be exercised to assure that both the Actuator Assembly shaftand the choke discs are in the OPEN position when these two

components are reassembled. Evenly torque these bolts to 165 ft./lbs(224 Nm.) Over-torquing the bolts will cause them to stretch andreduce their strength which can result in premature failure.

7) GAUGE PROTECTOR

The purpose of the Gauge Protector is to transmit fluid pressure from the drill pipeor the casing to the Control Console and isolate the gauges from the drilling mud.

A. Gauge Protector Repair

1. If the hydraulic hose is to remain attached to the gauge protector,remove the plug from the side of the body. This will permit air to

enter the body when the piston is removed.

2. Remove the body from the female hub by removing the wing nut.

3. Remove the stainless steel internal snap ring from the bore of thegauge protector body.

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4. Insert a 1/2"-13NC bolt in the tapped hole at the bottom of the piston.Use the bolt as a handle to extract the piston.

5. Clean the piston and replace the O-rings on the piston. Use only thesize and type O-ring called for in the parts list at the rear of thismanual.

PISTONSTYLE GAUGE PROTECTOR

CAUTION

THE O-RINGS USED IN THE GUAGE PROTECTOR ARE MADE OF A SPECIAL H2S

RESISTANT MATERIAL. USE ONLY THE O-RINGS SPECIFIED IN THE PARTS LIST

AT THE REAR OF THIS MANUAL.

6. Clean and inspect the bore of the gauge protector body for corrosion,wear and pitting. Replace the body if these conditions exist.

7. Before reinstalling the piston apply an ample film of silicone grease onthe piston and O-rings. Manually insert the piston all the way into thebody. The piston should move in the body with only moderate physicaleffort. If the piston sticks, replace the piston. Do not file or grind thebore of the gauge protection body or O.D. of the piston.

8 Reinstall the stainless steel internal snap ring. Refer to -Section 4.7 B-of this manual for refilling the gauge protector with hydraulic fluid.The body plug is replaced during the line filling procedure.

B. Filling Gauge Protector Lines

After assembly, the gauge protector, signal line and gauge lines on the Control Consoleshould be filled with hydraulic oil and purged of air. A few drops of oil will be lost each timethe line is coupled or uncoupled. It is, therefore, advisable to avoid disconnection these linesonce the system has been purged. Loss of hydraulic fluid in the lines may cause the gauge toread incorrectly. The hydraulic fluid in the system must be free of air or full pressure cannotbe transmitted to the gauge.

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1. Place the gauge protector in a vertical position near the ControlConsole. The signal line should be connected tightly to the gaugeprotector and the Control Console manifold.

2. Remove the check valve cap on the back of the Control Consolemanifold and attach the hand pump loosely to the check valve (SeeFigure 8). Do not tighten this connection yet.

3. Fill the manual hand pump reservoir with hydraulic fluid. Whilepurging, keep the hand pump reservoir at least 1/2full to avoidpumping air into the line.

4. Pump slowly, purging air from the pump at the loose connection.When the pump is purged of air, tighten the connection betweenthe pump and the check valve.

5. Turn the damper valve on the gauge counterclockwise severalturns to relieve the dampening effect.

6. Remove the pipe plug on top of the gauge to allow air to bleedfrom the system.

RESERVOIR COVER

HAND PUMPFigure 8

7. Pump fluid into the system until no air bubbles appear at the plugon the gauge. Tighten the plug and push the damper valve in,turning clockwise to engage the threads.

8. Lay the hydraulic hose out as straight and flat as possible, belowthe level of the gauge.

9. Remove the plug from the gauge protector body.

10. Pump hydraulic fluid into the system to purge all air from thesignal line and the gauge protector. Bleed air out at the gaugeprotector plug opening.

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11. When the signal line and gauge protector appear to be purged or air, continuepumping slowly and rock the gauge protector slightly to help pass anyremaining air through the vent holes. Rotate the gauge protector plug end up,to displace any air from the passage.

12. When all the air has been purged from the system, replace the plug on thegauge protector and tighten.

13. Once the plug in the gauge protector is replaced, continue to pumphydraulic fluid into the system until the piston contact the internal snap ring inthe bore of the gauge protector.

14. Close the hand pump cover and remove the pump from the check valve.

15. Replace the check valve cap.

8) POSITION INDICATOR SYSTEM

This system utilizes a 3 to 15 psi (21 to 103 kPa) air signal to operate an indicator gaugeon the Control Console. The signal comes from a plunger type regulator. As the choke is

rotated toward the "CLOSE" position, a cam connected to the Control Console shaft movesthe pivot arm assembly. The pivot arm assembly pushes on the regulator plunger andincreases the air signal. At the full OPEN position, the signal is 3 psi (21 kPa), at the fullCLOSED position the signal is 15 psi (103 kPa).

The Position Indicator gauge is labeled OPEN and CLOSE with a mark at the middleposition to indicate Y2 or 50% open. The Position Indicator serves as an aid in observing thedirection and speed of changes being made in the choke opening.

Calibration and Adjustment

Connect the supply air from the Control Console to the left tubing fitting, and connect thesignal return air to the right tubing fitting. Turn the air supply on (See figure 9).

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Figure 9.

A. To Zero the "Position the Indicator" Gauge

1. Completely OPEN the choke.

2. Loosen the 1/4"nut and set screws on the camshaft so the cam

turns on the shaft.

3. Rotate the cam so the scribe mark on the short side of the cam linesup with cam follower.

4. Tighten shaft nut and set screws.

5. Loosen the pivot block locking screw on rear of mounting plateand turn the "zero" adjustment screw until signal output is 3 psi (21kPa) on a test gauge, or "OPEN" on the position indicator gauge.

6. Tighten pivot block locking screws.

7. Be sure the output is 3 psi (21 kPa) when the the locking screw istight. Movement during tightening may slightly change the setting.This can result in inaccurate readings of the position indicator. Ifoutput is not 3 psi (21 kPa), adjust pivot block as indicated in Step5 above to obtain the required 3 psi (21 kPa).

8. Completely CLOSE the choke. The test gauge should read 15 psi(103 kPa), or "CLOSED" on the position indicator gauge. If not, itwill be necessary to adjust the span of the Indicator Gauge.

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B. To Zero the "Span" of the Indicator Gauge

1. Completely CLOSE the choke. This puts the scribe mark on the long side ofthe cam at the cam follower. Output should be near 15 psi (103 kPa) on thetest gauge, or "CLOSED" on the position indicator gauge.

2. If less that 15 psi (103 kPa), loosen both socket head cap screws and moveregulator bracket slightly away from the pivot block; if more than 15 psi (103kPa), move regulator bracket slightly toward the pivot block.

3. Tighten both socket head cap screws.

4. Completely OPEN the choke. If output is not 3 psi (21 kPa), re-adjust thepivot block as in Section 5.1.12 to 3 psi (21 kPa).

5. Completely close the choke and check 15 psi (103 kPa) signals.

6. Repeat Steps 1 through 5 until3 and 15 psi (21 and 103 kPa) outputs areobtained.

NOTE:

I F IT I S NOT CONVENI ENT TO USE THE CONTROL PANEL TO ROTATE THE CHOKE,

USE A SHORT ADAPTER CONNECTION BETWEEN THE " OPEN" AND " CLOSED"

CONNECTORS, AND ROTATE THE CHOKE BY HAND; HOWEVER, I T I S BEST TO

CHECK THE CONTROL CONSOLE AND CHOKE VALVE TOGETHER.

9) DIGITAL PUMP/STROKE RATE METER

The QOT Digital Stroke / Rate Meter has been designed for simple maintenance. The metercontains three interconnected modules; a display module, a switch module and a batterypack. Should anyone of these modules fail, they are not repairable and must be replaced.Refer to the Troubleshooting Guide in -Section 6.5-. Parts information is given in the rear ofthis manual.

10) ACTUATORASSEMBLYSee the Appendix for the manufacturer's instructions for repair and maintenance of theActuator Assembly.

5. PRESSURE TESTING

This section describes how to perform a shell and disc hydrostatic test on the HydraulicChoke. This test is not intended to supersede or duplicate the Standard API Specification 6AShell and Leak Test, but provide a routine procedure to verify that the seals and discs are notleaking and to verify the integrity of the pressure containing parts.

A. PROCEDURES

1) SHELL HYDROSTATIC TEST PRESSURE

1. Completely OPEN the choke discs.

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2. Connect test flanges with isolation valves to the inlet and outlet flanges of theHydraulic Choke.

3. Place the Hydraulic Choke with the side of the Actuator Assemblyhousing and the outlet flange resting on the ground. The inlet flange is pointingupward.

4. With the isolation valves on the inlet and outlet flanges open, fill the choke

with water from the outlet end. When the choke appears to be full, raise theoutlet end until the centerline of the valve is parallel to the ground.

5. Continue filling choke with water. When all of the air has been purged fromthe choke, close the isolation valve on the outlet flange anddisconnect the water line. Lower the choke outlet to ground level.

6. Open the hydraulic inlet valve and purge any air that may be trapped in thehydraulic feed line.

7. It may be necessary to purge air from the hydraulic line to the pressure gauge.Open the bleed fitting for the pressure gauge and close theisolation valve on the inlet test flange. Pump hydraulic oil through the gauge

line until all air is removed. Close the bleed fitting for the gauge.

8. With the inlet and outlet isolation valves closed and the hydraulic inlet valveopen, slowly raise the pressure on the choke shell to 10,000 psi (68950 kPa).Check the valve and test flanges for leaks. If leaks occur, stop the test, takeappropriate steps to correct the problem and repeat this test procedure.

9. If no leaks are evident at this point, close the hydraulic valve on the inlet testflange and observe the pressure gauge for three (3) minutes. If the pressurebegins to bleed down before three minutes, inspect the choke and test flangesfor leaks. Repair leaks as required and repeat this test procedure.

10. Open the isolation valve on the outlet test flange and remove the test flanges.

CAUTION

DO NOT BLOCK THE DISCHARGE OPENING FOR THE ISOLATION VALVES. WHEN THEVALVES ARE OPENED UNDER PRESSURE A SMALL QUANTITY OF WATER WILLSHOOT OUT OF THE OPENING.

2) HYDROSTATIC DISC TEST PROCEDURE

1. To prepare the choke for the hydrostatic disc test, fill the valve with water andremove all of the trapped air as described in -Section 5.A.l- Steps 1-7.

2. With the isolation valves on the inlet and outlet test flanges closed, slowly raisethe pressure in the choke to approximately 2,500 psi (17238 kPa).

3. With the hydraulic valve open and pump on, close the choke discs. Open theisolation valve on the outlet test flange. This should seat the choke discs.Slowly raise the pressure in the choke to 10,000 psi (68950 kPa) leaving theoutlet isolation valve open.

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4. Watch the test gauge for three (3) minutes. If the pressure bleeds down,disassemble the choke to determine the cause for the leakage. Replace thediscs or seals as required and repeat this test procedure.

6. TROUBLESHOOTING

A. DIAGNOSTIC GUIDES

1. CHOKE DISCS WILL NOT OPEN OR CLOSE

CAUTION

BEFORE DISCONNECTING AIR OR HYDRAULIC LINES, TURN THE SYSTEM OFF ANDMAKE ABSOLUTELY SURE THAT ALL PRESSURE IN THE LINES HAS BEEN RELIEVEDFAILURE TODO SO MAY RESULT IN INJURY.

To locate the problem when the Control Console will not operate the Hydraulic Choke, turn themaster air supply valve "ON". The control lever should be in the neutral "HOLD" position. Fullyopen the hydraulic regulator by turning the knob counterclockwise several turns. If the hydraulicpump cycles a few times and stops, proceed to Section -6.A.I-. Step 5.

If the hydraulic pump continues to cycle, proceed with the following steps in the order listed (SeFigure 10).

1. Check the hydraulic fluid level in the reservoir. If less than half full, add tcorrect hydraulic fluid, Do not use diesel oil because this will cause somevalve seals and hydraulic hoses to deteriorate.

2. Check the low pressure suction hose between the reservoir and the hydraupump for leaks, collapse or crimping. This condition will cause the pump lose prime and not pump fluid. Replace this hose as needed.

3. Check the high pressure hose from the output manifold on the hydraulicpump to the hydraulic regulator and from the hydraulic regulator to thecontrol valve for leaks. Replace these hoses as needed.

Figure 10

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4. Disconnect the return line on the hydraulic relief valve. This hose must -temporarily be plugged to prevent hydraulic fluid in the reservoir fromleaking out. Make certain to remove this plug before reinstalling the hydraulicrelief valve return line. If hydraulic oil is leaking from the discharge of therelief valve when the pump is cycling, slowly tighten the pressure adjustmentscrew on the relief valve while observing the pressure gauge on the outputmanifold on the hydraulic pump. When the maximum reading on this pressuregauge reaches 1800 psi (12411 kPa) stop tightening the adjustment screw on

the relief valve and lower the air pressure on the air regulator feeding thehydraulic pump until the hydraulic pressure drops to 1500 psi (10342 kPa). Atthis point, the pump should stop cycling and the relief valve should stopleaking from the return connection. If the relief valve continues to leak, replaceit.

5. Remove the return line from the control valve. Start the hydraulic pump andcheck the return connection for leakage. If hydraulic fluid leaks from thisconnection, repair or replace the control valve.

6. Remove the pump suction and discharge check valves. Check for debris or afrozen valve. Repair or replace as needed.

7. Inspect the open and close hydraulic lines to the choke form crimps, pinchingand damage. Replace as needed.

8. Connect the "Choke Open" hydraulic line to the "Choke Close" hydraulic lineusing the quick-connect hose coupling on the Actuator Assembly.

Operate the control lever to both the OPEN and CLOSE positions. If the hydraulic pumpbegins to cycle when the control lever is moved to the OPEN and CLOSE positions, check thehydraulic lines for the leakage and proceed to Step 9. Reconnect the hydraulic lines to theActuator Assembly.

9. Turn off the air supply to the hydraulic pump and bleed the hydraulicsystem to relieve the pressure in the lines between the hydraulic pump and therear manifold on the Console.

Remove the high pressure hose between the hydraulic regulator and the control lever. Makesure the hydraulic regulator is open. Turn on the air supply to the hydraulic pump. If little orno fluid flows through the hydraulic regulator, then it is plugged and must be repaired orreplaced.

10. At this point if the Control Console will still not operate the choke, theproblem has been isolated to either the Actuator Assembly or the Choke Valve.Remove the Actuator Assembly (See Section 2.B.) and rotate theActuator using the Control Console. If the Actuator does not rotate, check therouting of hydraulic lines inside the Actuator cover and repair or replace as

needed. If the Actuator still does not rotate, replace the Actuator. (SeeAppendix D for manufacturer's instructions.)

If the Actuator rotates when the control lever is operated the problem has been isolated to theChoke Valve. Remove the Bonnet end of the choke using the procedure beginning the -Section 4.6-. Clear debris from the valve or repair the choke and reassemble.

2) CHOKE OPENS OR CLOSES TOO SLOWLY

1. Check for partial plugging in the hydraulic regulator needle valve and inthe check valves of the quick disconnect hose couplings.

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2. If faster choke response is desired replace the standard 3/16" ID highpressure hose with 1/4" ID hose or hard piping. DO NOT EXCEED 15psi (103 kPa) hydraulic pressure. If the Turning Fork becomes locked,hydraulic pressure greater than 15 psi (103 kPa) could result in over-torqing and "twisting off' the end of the Turning Fork. This conditionwould make it impossible to control the position of the choke discs.

3) CHOKE VALVE LEAKS

1. Determine the location of the leak. If the leak is at the Bonnet end ofthe valve, remove the Bonnet and Turning Fork from the body asdescribed in -Section 4.6- of this manual. Clean and inspect the sealingsurface for damage and wear. Replace the seals as required andreassemble the valve as described in -Section 4.6-.

2. If the Choke Valve leaks between the body and outlet spool, remove theHydraulic Choke from the manifold and repair the outlet spool end ofthe valve as described in -Section 4.5-.

If the inlet or outlet flanges leak, remove the valve and replace the seals as described in -Sections 4.5 and 4.6.

4) CHOKE DISCS LEAK

There are several conditions that will cause the choke discs to leak. The repairprocedure to stop the discs from leaking is to disassemble the choke from the outletend and examine the internal parts to determine the cause for the leak. -Section 4.5-describes the proper disassembly and inspection procedure.

Below is a list of conditions to be checked that will cause the choke discs to leak..

Dirt, rust or other debris between the discs . Worn or cracked discs Damaged or improperly sized O-ring around the back disc Missing or damaged back disc locking pin . Front disc frozen to the turning fork . Improper alignment of the front disc on the turning fork. Alignment pin may be

damaged or missing . Improper orientation of the indicator head on the turning fork . Improper alignment of the actuator shaft on the indicator head . Worn or damaged thrust bearing between the bonnet and turning fork

5) DIGITAL PUMP STROKE/RATE METER

The rate meter contains three modules which are not field repairable, however, theywere designed for easy field replacement. Before replacing any of the modules, make

the following check: Place the selector switch in the "Test SPM" position. If the rate is128 and the counter counts, the problem is probably with the wiring or the pumpstroke switches. The rate meter is working properly. If neither the wiring nor the pumpswitches are bad, replace the switch module and repeat this test.

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If the meter does not indicate in the test position, replace the logic module.

A troubleshooting symptom-cure table can be found at the rear of this manual.

6) PRESSURE GAUGES NOT READING CORRECTLY

The pressure gauges located on the QOT Choke Control Console will, in almost allcases, be the gauges which are used to determine drillpipe pressure and casing

pressure during operations involving the use of the QOT Hydraulic Choke. If thesegauges are not working properly, repairs should be made before operations involvingthe Hydraulic Choke are undertaken.

1. Check that the dampening valve on the gauge is not closed.

2. Check the hydraulic hose to the gauge protector for damage orcrimping.

3. If the gauge fails to register correctly at higher pressures, check for airin the hydraulic lines or improperly charged lines to the gaugeprotectors. See -Section 4.7.B- of this manual.

4. If the hydraulic lines to the gauge protector are longer than 100 ft. (30meters), hard piping or special steel braided hose will be required.

7) POSITION INDICATOR NOT WORKING

1. Check the air supply gauge on air regulator attached to the hydraulicpump for a positive reading of 3-35 psi (27-241 kPa).

2. Check air supply and signal lines for leaks and crimping.

3. Make sure the cam is tight on the cam shaft and the cam shaftconnected to the actuator unit is tight and straight. The cam should turna fu11 180 when the choke position is changed from the OPEN toCLOSED or from CLOSED to OPEN.

4. Check choke position, 3 psi (21 kPa) applied directly to the gaugeshould indicate "OPEN" of the gauge, and 15 psi (103 kPa) shouldindicate "CLOSED", if the gauge is in good condition.

If the position gauge does not agree with the calibration band on the choke, See -Section4.8.A&B- for the correct installation and adjustment.

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MAINTENANCE AND OPERATION

MANUAL

PUMP STROKE RATE METER

Quality Oil Tools, Inc. Jennings, Louisiana P: (337) 616-3300 F: (337) 616-3299


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DISCLAIMER

Any recommendation for use, oral or written, shall be considered advisory in content and as such,

Quality Oil Tools, Inc. shall not be held liable under any warranty, expressed or implied, should thisproduct not perform under conditions other than its intended use as a accumulative pump strokecounting device.

Quality Oil Tools, Inc. shall in no way be liable for damages incurred while using this product.

File copies of this manual are maintained. Revisions and/or additions will be made as deemednecessary by Quality Oil Tools, Inc. The drawings in this book are not drawn to scale, but anydimensions are accurate.


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INTRODUCTION

As with any electronic equipment the Quality Oil Tools, Inc. Pump Stroke/Rate Meter Assembly issubject to wear and eventual failure. Periodic disassembly and inspection is required and should be leftto a qualified repair technician.

Every precaution has been taken to ensure the highest quality product has been provided for use. Anyquestion or correspondence should be directed to:

Quality Oil Tools, Inc.P. O. Box 718Jennings, Louisiana 70546Telephone number (337) 616-3300Fax (337) 616-3299Email: [email protected]


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*** TABLE OF CONTENTS ***

SECTION I GENERAL INFORMATION

W ARRANTY INFORMATION

SECTION II TROUBLE SHOOTING AND MAINTENANCE

SECTION III REPLACEMENT PARTS


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SECTION I

GENERALINFORMATION

The Quality Oil Tools, Inc. Digital Pump Stroke Rate Meter is a intrinsically safe

Class 1, Div. 1 unit designed for simple maintenance.

Because this unit is intrinsically safe no explosion proof housing or switches are required.

The meter contains three interconnected modules. They are the display module or PCB, the switchmodule and the battery pack.

Should anyone of these modules fail they will have to be replaced as they are not field repairable.

The logic module (PCB) can be repaired if returned to Quality Oil Tools, Inc. factory.

Section II provides a trouble-shooting guide to assist in the repair of the counter assembly.

Section III provides a list of replacement parts for the Quality Oil Tools, Inc. Pump Stroke/RateMeter .

We have made every effort to document all necessary information which will allow users to install

and operate the QOT Rate Meter.

This information has been carefully reviewed and is believed to be accurate. However, no

responsibility is assumed for inadvertent omissions or errors that may appear in this document.

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WARRANTY INFORMATION

Quality Oil Tools, Inc. Pump Stroke/Rate Meter is warranted to be free of defects in material andworkmanship under normal usage for a period of one year .

This warranty applies to the original purchaser only. The warrantyperiod shall be for one year from the date shipped when the product is used in a manner for which itwas manufactured.

Quality Oil Tools, Inc. liability for the Meter Assembly shall be limited to replacement, free orcharge on any parts found to be defective in materials or workmanship.

This limited warranty does not include service to repair damage to the product resulting fromaccident, lightning, high voltage, disaster, misuse, abuse, modification or service to the productunauthorized by Quality Oil Tools, Inc.


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SECTION II

TROUBLESHOOTING AND MAINTAINENCE

This section discusses troubleshooting and maintenance for the digitalstroke/rate meter system assembly.

The Pump Stroke/Rate Meter system is powered by a built in battery pack. No outside source or

power is required.

The meter assembly contains three modules which were designed for easy field replacement.Before replacing any of the three modules, check the counter assembly as follows:

Place the selector switch in the "Test SPM" position.The rate meter should read: "60 strokes / min. and count 1,2,3,4 "

Should the counter read as above it is working properly and the problem may be inthe wiring or limit switch assemblies.

If after making any necessary repairs the counter is still not working properly theswitch module should be replaced.

If there are no indications in the Test/Spill position or the readout is not workingproperly, replace the Logic Module.

REMEMBER: LIMIT SWITCHES MUST BE WIRED IN NORMALLYOPENFOR MAXIMUM BATTERY PACK LIFE.

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Quality Oil Tools, Inc.

P. O. Box 718

Jennings, Louisiana 70546

Telephone: 337) 616-3300

Fax: 337) 616-3299

E-mail: [email protected]

API-6A-0607

Q1-0036

ISO 9001:2000-0308

Choke Maintnance

Documents

Transcript of Choke Maintnance