Technical Specification - United Oil Services

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Technical Specification

Fast-Track Exit Low Side Cased Hole Whipstock Assembly


Content

S. No. Details Page

1 Introduction 3

2 Hydraulic Anchor Packer 4

3 Whipface 5

4 Hinge Connector 6 5 By Pass Valve 7

6 Material Characteristics 12

7 Technical Specification Guide 13

8 Setting Procedure 16


INTRODUCTION

CASING EXIT SYSTEM

Designed as a one-trip system for sidetracking operations, the United Oil Services Whipstock is

an innovative product engineered to reduce the risk and cost of launching cased hole sidetracks

A hydraulically set, one-trip system helps to avoid the costly time and fees associated with

mechanical bottom-hole designs. Our anchor and slip design enhances and increases wall

contact, reducing the likelihood of slipping or rotating downhole while milling. Simple but

sophisticated engineering allows for inexpensive transition between cement or conventional,

and cased versus open hole applications.

Benefits & Features

Gain better control of your directional drilling operations

Avoid the costly time and fees associated with mechanical bottom-hole designs with

this hydraulically set, one-trip system

Enhance and increase wall contact with an anchor and slip design, which reduces

the likelihood of slipping or rotating downhole while milling

Create an inexpensive transition between cement or conventional and cased versus

open hole applications with simple yet sophisticated engineering


HYDRAULIC SET ANCHOR PACKER

Proven designs that have been utilized throughout the world, PP packer is

available from 5” to 13 3/8” sizes.

Benefits & Features

UNITED provided hydraulic anchor packer in retrievable and permanent type.

The Hydraulic packer provides bi-directional slips that resist both upward and

downward movement of the whipstock.

Low setting Pressure Required.

Designed to maximize the amount of hydraulic force generated directly into the seal

and retaining slips.

Ratchet system lock slips and seal in position.

Size Packer OD Set

PPF Pressure Permanent Retrievable Inches Inches

Psi

5 15-18 4.032” 1600 Yes Yes

7 26-32 5.906 2600 Yes Yes

7 32-35 5.816 2600 Yes Yes

9 5/8 36-53.5 8.25 3000 Yes Yes

13 3/8 68-72 12.159 3400 Yes Yes


WHIPFACE

The whipface section is the part of the whipstock that actually directs the mills through the

casing wall or open hole. The whip face section has a number of features, each of them having a specific function that

contributes to the success of the whipstock.

AVAILABILITY:

1. LOWSIDE WHIPFACE

2. HIGH SIDE WHIPFACE

Benefits & Features

UNITED offers whip angles varying from 2 to 3 degrees.

Specialized design for hook-up protects the shear bolt from torsional forces

and tension during running allowing the BHA to pivot relative from each other

for maximum ease when installing in wells with restrictions or high DLS.

Retrieval slot is machined and located in whipface for retrieval by hook.

The top section of whipface is machined to allow clearance and engagement with die

collars and overshots that commonly available.

Manufactured to API standards and tested before shipping.

Has a fulcrum lug support which exerts force on the top of whipface to be able

create more area for clearance while re-entry.


HINGE CONNECTOR

Hinge Connector is the connection part between the whip face and the anchor section. For

Hydraulic application, the hinge connector has a relief angle machined to allow for rotation to

the low side and a pre machine bolt length/depth on the hinge connector upper face. The offset

created by the relief angle allows the packer to flex for running in the hole, when setting the

packer the hinge face straightens and offset is created by the bolt pushes the whipstock tip

against the casing wall so it cannot fall forward into the well bore. For mechanical applications, the hinge connector has a slight relief angle allowing some rotation

while running. When the mechanical anchor is set the lower effect acts as a fulcrum and centers

the offset created by the slip which ensures the whipstock tip is held against the casing. Should the whipstock anchor fail to release when retrieving, the hinge connector is designed with

pre-machined tolerance to allow for selective shearing and recovery of the whip face, the

remaining upper section of the hinge has a machined fish neck for engagement with a standard

overshot. The whip can be run hinged or fixed depending on the application.


BYPASS VALVE

BYPASS VALVE OPEN POSITION


BYPASS VALVE CLOSED POSTION


A) Open position of bypass valve When the internal valve of bypass valve is open circulation is done and the internal and external pressure of string is balanced. During running the equipment in well the max Pressure of 500 psi for circulation is allowed.

B) Closed position of by pass valve In order to set the packer, the pressure of bypass

valve is increased to 1000 psi, the internal valve of

bypass valve is closed. The increasing the pressure

the shear screws get sheared and the piston move

down, then the circulation port close.


C) Open position of running tools When the by pass valve is opened the running tools is not activated and no force is applied to the piston then the packer is in unset position.

D) Closed position of running tools After the bypass closed, the fluid pushes the piston of running tools down, then the piston push the oil down

to the oil line. Finally, the pressure increase to set the

packer. The min. pressure required to set the packer

is 1500 psi, in order to full set the packer the pressure

increase to 3000 psi.


Bypass Valve Test Procedure

1. To surface test the Bypass Valve (BPV) have the following components available. Kelly cock (closed) or test cap BPV MWD assembly Drill pipe or BHA components (2-3 stands), sufficient to ensure the, BPV is

below the rotary table.

2. Pick up the MWD assembly with sufficient BHA to create a stand to setback later in the

derrick.

3. Lower the stands into the hole and make it up to the Kelly or top drive.

4. Start circulation at a minimum flow rate or until MWD pulse is achieved. Stop

circulating. Record the circulation rate and pressure.

5. Pick up and add the BPV with the closed Kelly cock or test cap to the assembly.

6. Run the assembly back into the hole.

7. Start circulation and increase the flow rate to more than the value required to close the

valve. MWD pulses must be observed. Stop circulating. Record the circulation rate and

pressure. See Table A for the flow rates to close the valve.

8. Repeat the starting and stopping of circulation four more times to cycle the piston and to

test the MWD.

9. Slowly start circulation and stop for the sixth time to test the closing of the valve.

Note: High pressures may be experienced during this step. All personnel must be made

aware and all necessary precautions taken.

10. Repeat to verify that the valve closes again without cycling back to the starting position.

Note: If the piston cycles back to the starting position or does not hold pressure, pick up

and test the back up valve.

11. Pick up and break BPV at top inlet crossover (top sub) connection.


Material Characteristics

Whipstock and mills manufactured using P-110 is a casing and tubing grade with minimum yield

strength of 110 KSI, a minimum tensile strength of 125 KSI, and maximum yield strength of 140

KSI. Chemical & Mechanical Properties:

The details of raw material the Grade P110 as below

P-110 P-110 is a casing and tubing grade with minimum yield strength of 110 KSI, a minimum

tensile strength of 125 KSI, and maximum yield strength of 140 KSI. When P-110 was created,

Chemical Properties:

Phosphorus Sulfur Carbon Nickel

Max Max

0.030 0.030 - -

Mechanical Properties:

Tensile Yield Strength Hardness

Min

Min

Max HRC

125 KSI

110 KSI

140

KSI 40 ~ 45


LOWSIDE WHIPSTOCK 9 5/8”

Technical Specification Guide

Attributes 9 5/8”

Whipstock

Mud Rate for milling,GPM 250-350

Rat Hole Length, ft 12

RPM for milling,RPM 60-140

Hinge Pin Shear Value, lb 150,000

Mills OD, Inches 8 1/2

Setting Pressure of Packer, psi 3000

Minimum Pressure to Close BPV,psi 1000

Shearing Value of Shear Bolt, lb 55,000

Whipstock Assembly Retrieving Specifications with Hydraulic Set packer

Hydraulic packer Hook

Whipstock Sub-assembly

Retrieval

Assembly Maximum

Tool

Size (in) Torque Overpull

Maximum Load (lb)

(ft·lb) (lb)

9-5/8” 20,000 95,000 170,000


Shear Values for the Hinge Pins and Fishing Neck Dimensions

Hydraulic Packer Hinge Pin Shear Values Fishing Neck (in)

Sub-assembly

(lb) Diameter Length

Size (in)

9-5/8” 150,000 6.500 20

Flow Rate to Close By-Pass Valve

MudWeig (GPM) (GPM)

ht(lb/gal) 5" BPV 6-3/4"BPV

0.875"Nozzle 1.375"Nozzle

8.7 242 525

10 226 489

11 215 467

12 206 447

13 198 429

14 191 414

15 184 399

16 179 387

17 173 375


9 5/8” LOW SIDE WHIPFACE-TECHNICAL DATA

Casing

Size

inches

Whipstock

OD inches

Ramp Angle

Length Whipstock

face (meter/feet)

Tri-Ramp Whipstock

Length (meter/feet)

Length to Anchor

(meter/feet)

Total Length

(meter/feet)

Weight (Lbs)

9 5/8 8 2.5º 1.29/3.95 1.43/4.35 1.49/4.55 1.98/6.05 1550


Procedure for Setting Whipstocks

1. A gauge run should be made with a Full Gauge Window Mill, Casing Scraper and

Watermelon Mill assembly to ensure that the Whipstock and all milling assemblies will run in

the well without hanging up. Tagging an obstruction with the Whipstock on the way in the hole

could result in premature setting of the packer or inadvertent shear of the mill from the

Whipstock.

2. Preferably, the Whipstock needs to be positioned so that the window is milled across the joint

of the casing and not through a coupling or connection. Should a Cement of Bridge Plug be in

the well, confirm the Cement or Bridge Plug depth prior to running in with the Whipstock

assembly, ensuring that the Whipstock will be set above “bottom”. Preferably, setting depth should be 3-5 feet (1-1.5 meters) above a casing collar or connection,

such that the Whipstock and Packer / Anchor are in the same joint of casing, and that the top of

the window will also be in the same casing joint. 3. Typical Bottom Hole Assembly for MWD Survey One Trip Whipstock is as follows:

1. Whipstock Assembly (Using Hydraulic Anchor Packer for cased hole application) 2. Mill Assembly (3 Mills) 3. Running Tool

4. Flex Joint – (Single Joint of Drill Pipe Grade S135) CUSTOMER SUPPLIED

5. Circulating Valve or Ported Sub

6. Spacer Joint (Short Collar)

7. Survey Tool: MWD Tool (or UBHO Sub) if well inclination over 3°; UBHO 8. Heavy Weight or Drill Collars CUSTOMER SUPPLIED 9. Drill Pipe to Surface CUSTOMER SUPPLIED 4. Make up the Survey Tool, Flex Joint, Bypass Valve and a Blank Sub (or closed

Kelly Valve inverted). Run in hole 1-2 stands (subject to well bore fluid level)

and flow test the MWD and Circulating Valve, noting parameters to function the

Circulating Valve and flow rate to obtain a signal from the MWD. POOH. Note: Refer to the Circulating valve operating procedure document; the

circulating valve will be configured to close at less than 250 gpm. 5. Reset the Circulating Valve as required.


6. Picking up the whipstock. Normally the whipstock is provided with a False Rotary Table

/ Handling device use this or, if not using the supplied combined False Rotary Table /

Handling Device, secure a Safety Clamp around the body of the Whip stock approximately half

way down the concave face while the tool is lying on the pipe deck / catwalk. Pick the Whip

stock up with the winch or tuggerline using a shackle secured to the Lifting Eye Ring or a sling

double wrapped on the Whipstock body UNDER or BELOW the Safety Clamp.

SAFETY NOTE: The Whip stock should be picked up with a shackle secured on the Pick up Ring orwith a

Sling double wrapped around the Whipstock Body below the Safety Clamp toensure that

the Sling will not slip off the tapered Whipstock face during handling.

Close the BOP Blind Rams. Lower the Whipstock in to the main hole on the drill floor and secure with the

appropriate handling tools. Attach the Mill to the Whipstock Concave and tighten Shear Bolt. Care must be taken not

to over tighten the Shear bolt, with a maximum tightening torque between 50 to 100ftlbs,

but sufficient to pull the mill head into firm contact with the mounting block. Attach the hose to the Mill and Whipstock assembly, ensure system integrity by filling

the mill with CLEAN water or light oil, and check for leaks, note that air will need time

to percolate out at this point. (To check the air has percolated out, it will be necessary to

lower the assembly sufficiently to see into the tool joint).7. Pick up the assembly and remove the False Rotary Table and / or sling / Dog Collar Safety

Clamp Assembly. 8. Scribe line from shear bolt location to top of mill. Run the Whipstock assembly in through the

rotary table, land the mill in the slips, with Dog Collar for safety. 9. Make up Running Tool to Mill, and fill to top of Running Tool with CLEAN water or light

oil, allow sufficient time for the air bubbles to percolate out of the system. Insert Running Tool

Piston, bleed air out of extension and fit cap. 10. Make up Flex Joint and scribe line to top. Open the BOP Blind Rams.

11. Run in hole. Make up Circulating Valve or Ported Sub, MWD, and note offset of whipstock

face to Survey Tool.

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12. Run the Whipstock assembly, Mill, Running Tool, Flex Joint, Circulating Valve, Spacer

Joint and Survey Tool in the hole and set the slips on the single in the rotary table. Continue to

make up the bottom hole assembly with Drill Collars and/or Heavy Weight Drill Pipe to

facilitate milling and shear off weight requirements. Trip in hole in a slow and smooth manner,

approximately 1 stand every 2 minutes. Avoid any sudden stops or jerks as this may result in

premature shearing of the Setting bolts. IMPORTANT:

Proceed with extreme caution through B.O.P.’s, Well Head, Liner Lap and any other

restrictive sections. 13. Proceed in the hole and run the last 5 singles with extreme care subject to setting Depth and

bottom. Recheck the tally and the pipe count on location. Record accurate up and down string

weights. Pick up Kelly and or top drive, establish circulation and take directional surveys to

establish kick off direction. Start pumps and slowly increase circulation rate to obtain MWD

survey (alternatively run Gyro and pump down if required with minimum pump rate). Do not

surge pumps to break circulation, not in surface pressure and pressure drop across Circulating

Valve to avoid premature set of the packer. 14. Rotate the Whipstock slowly in increments to adjust direction if required, picking up and

setting down to work the torque out of the string. 15. Upon establishing proper direction, work the drill string up and down to remove all excess

torque from the drill string. Confirm orientation with Directional Drillers or Company Man. 16. Increase pump rate to close the valve at 1000 psi to start moving the piston at 1500 psi and

set the packer. Surface indication maybe noted by a flicker on the weight indicator. When the

bypass valve closes, there will be a sudden surge in pressure, which will require a

instantaneous reduction in Pump rate! Ensure the packer has been set with at least 3000 psi to obtain full isolation in the well bore. Whilst pressure is on the Packer, work the string up.

Continued down weight is applied to the shear off the Mill Assembly from the Whip stock, in the

event an upward shear is required, this is also possible. Note that the whipstock is provided with

an emergency shear release from the Hinge Connector and Packer and up loads must be limited

below this value whilst working the Mill Shear Pin.


WHIPSTOCK GENERAL OPERATION DIAGRAM

Technical Specification - United Oil Services

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