7 Rotating Control Devices

Rotating Control Devices 1

At Balance® with Smith 1

HOLD® 1500 and 2500 Rotating Control Device 2-3

HOLD® Offshore Conversion Kit 4

Marine Riser Installation 5

RDH 2500® Rotating Control Device 6

Hydraulic Power Unit/Lubrication System 7

DHS 1400 Rotating Control Device 8

Model 7068 Rotating Control Device 9



Model 8068-G Rotating Control Device 12

Rotating Control Device Accessories 13

TABLE OF CONTENTS

1

Rotating Control Devices “Under Pressure … In Control”

Smith Services is an industry leader in providing Rotating Control Devices (RCD), also known as rotating heads. A RCD seals around the drillstring components, diverting dust, mud, air/gas, mist, foam or steam away from the rig floor. From conventional air, gas and geothermal drilling to to-day’s complex Underbalanced Drill-ing (UBD) and managed pressure projects, Smith Services has a RCD designed for the job. Smith products are backed by experienced opera-tions and service personnel ensuring that the application, installation and demobilization are done right.

The stripper element is the critical component of the Smith Services RCD. This is the active barrier be-tween the fluids in the wellbore and the rig floor personnel. A mechanical seal is created by the stretch interfer-ence fit between the kelly/drill pipe and the ID of the stripper element and is active 100 percent of the time. Seal reliability and stripper element life are maximized through the strict material quality and manufacturing process controls used to build each Smith Services stripper element.

The Mechanical Seal AdvantageStretch interference fit around • the drill stem components to seal 100 percent of the timeStripper elements that are easily • replaced at the rig • Maintainable by the rig crew • Seal that is not lost in the event of any type of hydraulic or elec-trical power disruption • Seal that is enhanced in the pres-ence of wellbore pressure

ApplicationsRig site safety is the main reason • for utilizing a RCD. This piece of equipment enables drilling oper-ations to continue while isolating the drilling personnel from po-tentially harmful wellbore fluids and gassesConventional air, mist, foam and • gas drilling require a RCD for the isolation and redirection of the wellbore dischargeRCD protect the environment by • directing potentially harmful well-bore fluids and gasses through the processing equipment on location, before being returned to the atmosphere • Underbalanced and managed pressure operations require the use of a RCD to safely direct the wellbore flow through the nec-essary processing equipment as

drilling operations progress. A RCD is required in all types of UBD, however, a good deal of planning must be done to ensure the right equipment and the ap-propriate stripper elements are selected • Geothermal drilling requires a RCD designed to operate at high temperatures. High-temperature stripper elements are also neces-sary • Drilling risks from problems such as lost circulation, fresh water flows or unexpected events from wildcat exploration wells can be mitigated with the use of a RCD to control potential influx

Note: These products, regardless of pressure ratings, are diverters and not blowout preventers.

Note: The published test pressure ratings contained herein pertain to the bearing section lower seal assem-blies only and do not apply to any of the stripper ele-ments. Further to this, Smith Services, a Business Unit of Smith International, Inc., does not guarantee, either expressed or implied, the pressure ratings published in this or any other printed materials.

The At Balance Automated Pressure Drilling Services provide a pressure management method which increases safety, enhances performance and reduces drilling costs. This revolutionary technol-ogy uses the Integrated Pressure Manager™ (IPM), which combines a high speed programmable system with a real-time hydraulics model to control bottomhole pressure with unmatched speed and precision. Combined with the Smith HOLD Rotating Control Device, customers now have a high-performance solution for their most challenging managed pressure drilling applications.

At Balance® with Smith

At Balance is a registered trademark of Shell Technology Ventures Fund 1 B.V.

2

HOLD® 1500 and 2500 Rotating Control DevicesThe HOLD Rotating Control Device comes in two sizes. The HOLD 1500 and the HOLD 2500. They are both designed with rig safety and opera-tional reliability in mind. The hydrau-lically operated lock-down system eliminates the need to send person-nel below the drilling floor to release primary or secondary locking systems when installing or replacing the strip-per element. These elements can be changed independent of the bearing assembly, saving additional rig time and eliminating the need for excess inventory on location.

The HOLD AdvantageHOLD 1500 - Rated to 1500 psi • operating pressure and up to 13 3⁄8" through the bearing as-semblyHOLD 2500 - Rated to 2500 psi • operating pressure and up to 12 1⁄4" through the bearing assemblyStatic test pressure rated for: • HOLD 1500 - 1,500 psiHOLD 2500 - 3,000 or 5,000 psiRig personnel safe on the rig • floor during release and removal of the seal elementDesigned for safe, reliable fluid • diversionReduced trip time and improved • well site safety

Features and BenefitsImproved rig safety• Operations console located con-• veniently on the rig floorMechanically energized stripper • element to provide an uninter-rupted wellbore sealLarge heavy-duty tapered roller • bearings to provide low-torque rotation and load supportContinuous circulation system • lubricates bearings and seals for reliable service Independent high-pressure seal • systems for optimum perfor-manceFull range of stripper elements • for oil, gas or geothermal drillingReal time wellbore pressure sen-• sor and chart recorder

Remote Hydraulic OperationThe HOLD RCD enables the complete replacement of the stripper element without going below the rig floor to unbolt any primary or secondary locking bolts to unlock the clamp. The HOLD RCD offers a superior clamping system that is hydraulically actuated for both locking and unlocking. The driller operates all hydraulic systems from a control console installed con-veniently on the rig floor. The remote operated hydraulic clamp improves rig safety and decreases element re-placement time.

Features and BenefitsComplete hydraulic lock-down • and release of the stripper ele-ment Control panel conveniently locat-• ed on the rig floorFail-safe locked mechanism that • requires hydraulic pressure to open Safety Interlock System that • prevents release of the seal ele-ment in the presence of wellbore pressureSecondary mechanical locking • system not required Visual indicator pin on the head • that confirms when the system is locked down

Focus on HSEThe Offshore kit option for the HOLD 1500/2500 is the only system cur-rently available which is in compli-ance with 100% zero environmental discharge. In the event of a stripper rubber failure the released fluids are safely contained within the overshot riser, preventing minor environmen-tal incidents from impacting rig op-erations. The offshore kit is easily adapted to land applications where zero discharge compliance require-ments are in effect.

The HOLD RCD requires the High-Pressure Hydraulic Skid for rig site operation.

Pressure ratings have been determined through controlled laboratory test procedures. Due to the uncontrolled environment of well drilling opera-tions, Smith International, Inc., its Business Units, Agents and Affiliates make no warranty, either expressed or implied, on the pressure ratings contained herein. Smith International, Inc. does not, under any circumstances, recommend that its rotating drilling heads be used as primary blowout prevention equipment.

Specifications

HOLD 1500 HOLD 2500

Rotating Test Pressure 1,500 psi 2,500 psi

Static Test Pressure 1,500 psi 3,000 psi/5,000 psi

Maximum RPM 150 rpm 150 rpm

Height 58” 58”

Maximum Bearing 13 ⁵⁄₈” 12 ¼”

Rotary Drive Yes Yes

Top Drive Yes Yes

3

HOLD RCD Components1. Drive Assembly2. Stripper Element3. High-Pressure Seal Section4. Mounting Spool5. Visual Indicator Pin6. Latching Lug7. Bearing Assembly8. Wellhead Adapter Spool9. Inlet Flange to match Annular BOP

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2

8

9

7

3

4

5

6

HOLD® 1500 and 2500 Rotating Control Devices

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1

2

3}

The HOLD Offshore Conversion Kit can be installed on either the HOLD 2500 RCD or the HOLD 1500 RCD bearing section as needed. The Offshore Conversion kit modifies the top of the HOLD RCD to provide a custom flange at the top of the RCD. A typical installation would provide a top flange with a welded-on 24 inch OD Overshot Mandrel to engage the Overshot Packer for jack-up or tension-leg drilling platform installation, however, almost any configuration of equipment can be provided.

While the Offshore Conversion Kit is not designed to be a struc-tural member of the Marine Riser, it provides a fluid connection to enable flow through the RCD to

the diverter and bell nipple used in many typical marine installa-tions, and substantial side loads can be accommodated which help maintain RCD alignment with the rotary or top drive above.

A 16.8 inch minimum ID is re-quired above the RCD to allow installation of the stripper rub-ber elements. The maximum OD of the bearing assembly with the conversion kit installed is 30 inch-es, and it adds approximately 3 inches to the height of the RCD.

HOLD Offshore Conversion Kit Components1. Overshot Mandrel2. Special Top Flange3. Offshore Conversion

HOLD 2500 Bearing Section with Offshore

Conversion Kit installed

Top view looking into the RCD

Control Panel

HOLD® Offshore Conversion Kit

5

With the stripper rubber element in-stalled, all return flow is diverted through the side outlet on the wellhead adapter spool. In typical installations, a valve is installed on the adapter spool outlet to allow the flow to be directed through the rigs conventional mud system when the stripper rubber is removed.

Typical Marine Riser Installation

Marine Riser Installation

76

The Hydraulic Power Unit (HPU) is an important component of the HOLD® 1500/2500 and the RDH 2500 Ro-tating Control Devices (RCD). This unit pumps the oil that lubricates and cools the bearing assemblies and delivers the required pressure to the inside of the high pressure seals, en-abling them to hold up to 3,000 or 5,000 psi (static test pressure) well-bore pressure. The HPU is located away from the drilling floor, requiring a 110V electrical supply and an air supply from the rig.

The operational features of the HOLD High-Pressure HPU are:

Two large 75-gallon oil reservoirs• Separate high-pressure and low-• pressure lubrication systems

Built-in air compressor that au-• tomatically engages if the rig air supply is disruptedHigh-pressure lubricant system • regulated by a mechanical system. Electrical wiring not required be-low the rig floorWellbore pressure sensor that sig-• nals the high-pressure lubricant system to deliver measured pres-sure plus an additional 150 psi, ensuring a positive pressure dif-ferential across the seal faceA seven-day chart recorder that • maintains a continuous wellbore pressure recordA control console located on the • rig floor that operates the clamp-ing system, and is independent of the High-Pressure HPU

Low Pressure LubricationSince the bearing assemblies in all Smith Services rotating heads are sealed, a low-pressure lubricator is a necessary part of the system. The lubricator does not have to be placed on the rig floor and only needs to be hooked to the rig air supply to oper-ate. The system is virtually mainte-nance free, requiring only occasional service from the rig crew to top off the oil in the reservoir.

The lubricators come in two types:Recirculating system for use with • high-temperature applicationsNon-recirculating system for use • in normal conditions and cold temperature applications

RDH 2500 HPU

Hydraulic Power Unit/Lubrication System

HOLD 2500 Hose Reel

HOLD HPU

RDH 2500® Rotating Control DeviceThe RDH 2500 Rotating Control Device (RCD) offers built-in safety features that make this head an excellent choice for underbalanced and managed pressure drilling projects. The stripper element can be easily changed independent of the bearing assembly, saving rig time and eliminating the need for excess inventory on location. This product features a split body de-sign with the bearing assembly at-taching to the mounting spool via a heavy-duty lower clamp.

Features and BenefitsHigh-pressure oil circulation • and lubrication systemReal-time wellbore pressure • sensor and recorder

Mechanically energized stripper • element to provide an uninter-rupted wellbore sealLarge heavy-duty tapered roller • bearings to provide low-torque rotation and load supportContinuous circulation of hy-• draulic oil to lubricate and cool the bearings and sealsIndependent high-pressure • seal assembly to ensure fail-safe operationElastomers that are available • for oil, gas, high-temperature and water-based drilling fluidsDual stripper element adaptor • to increase drilling personnel rig floor safety

Notes:Kelly bushings are available for most API kellys• Stripper elements are available for 2• 7⁄8", 3 1⁄2", 4 1⁄2", 5" and 5 1⁄2" drill pipe (other sizes available on request)

Ordering instructions, please specify:Inlet flange size• Outlet flange size• Kelly size and shape• Drill pipe size• Drilling fluid type• Expected circulating temperature• Expected surface pressure•

Technical Data

Specifications

HOLD 1500 HOLD 2500 RDH 2500

Rotating test pressure 1,500 psi 2,500 psi 2,500 psi

Static test pressure 1,500 psi 3,000 psi / 5,000 psi 3,000 psi

Max. rpm 150 rpm 150 rpm 150 rpm

Height 54" 54" 48" - 59"

Max. width 39 5⁄8" 39 5⁄8" 39 5⁄8"

Bearing assy. rotary table pass through 27 1⁄2" 27 1⁄2" 27 1⁄2"

Rotating stripper element Single or dual Single or dual Single or dual

Stripper element mounting Bolt on Bolt on One-piece or bolt on

Rotary drive Yes Yes Yes

Top drive Yes Yes Yes

Dual stripper element adaptor Yes Yes Add 18" - 22"

Max. pass through bearing assembly 13 5⁄8" 12 1⁄4" 9"

Inlet Flange Spool ID Outlet Flange

7 1⁄16" - 5000# 7 1⁄16" 7 1⁄16" - 2000/3000/5000#

7 1⁄16" - 5000# Shorty 7 1⁄16" 7 1⁄16" - 2000/3000/5000#

9" - 3000# 9" 7 1⁄16" - 2000/3000/5000#

11" - 3000 / 5000# 11 1⁄4" 7 1⁄16" - 2000/3000/5000#

11" - 3000# Shorty 11 1⁄4" 7 1⁄16" - 2000/3000/5000#

13 5⁄8" - 5000# 13 5⁄8" 7 1⁄16" - 2000/3000/5000#

Drive bushing

Top clamp

Bearing assembly

Lower clamp

Inlet flange

Outlet flange

Clamp bolts

RDH 2500 RCD

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Model 7068 Rotating Control DeviceThe Model 7068 Rotating Control Device (RCD) is the low-pressure workhorse of the Smith Services rotating head fleet. It has es-tablished a reputation for dependability and ease of operation. The compact design of this head (the “Shorty” is less than 25 inches tall) makes it ideal for use on small drilling rigs where substructure height is limited.

Features and BenefitsMechanically energized stripper element • to provide an uninterrupted wellbore sealLarge heavy-duty tapered roller bearings • to provide low-torque rotation and load supportShock cushion in the retrievable drive • bushing to absorb lateral drillstring im-pact, ensuring dependable bearing per-formanceAvailable in “Shorty” (only 24 ⅜ inches • high) versionElastomers available for oil, gas, high-• temperature and water-based drilling flu-ids

Notes:Kelly bushings are available for most • API kellysStripper elements are available for • 2 7⁄8", 3 1⁄2", 4 1⁄2", 5" and 5 1⁄2" drill pipe (other sizes available upon request)Stationary casing stripper elements • are available from 6 5⁄8" to 10 3⁄4" upon special order

Ordering instructions, please specify:Inlet flange size• Outlet flange size• Kelly size and shape• Drill pipe size• Drilling fluid type• Expected circulating temperature•

Technical DataSpecifications

Inlet Flange Spool ID Outlet Flange Height

9" - 3000# 9" 7 1⁄16" - 2000# 31"

11" - 3000 / 5000# 11 1⁄4" 7 1⁄16" - 2000# 29 7⁄8"

11" - 3000 / 5000# Shorty 11 1⁄4" 7 1⁄16" - 2000# or 7" threaded 24 3⁄8"

13 5⁄8" - 3000# 14" 7 1⁄16" - 2000# 29 7⁄8"

13 5⁄8" - 3000# Shorty 14" 7 1⁄16" - 2000# or 7" threaded 24 3⁄8"

13 5⁄8" - 5000# 13 5⁄8" 9" - 2000# 31 7⁄8"

Rotating test pressure 250 psi*

Static test pressure 750 psi*

Max. rpm 150 rpm

Height 24 3⁄8" - 38"

Max. width 32 1⁄2"

Stripper element mounting One-piece or bolt on

Rotary drive Yes

Top drive Yes

Dual stripper element adaptor Add 18" - 22"

Max. pass through bearing assembly 13 3⁄4"

Clamp bolt Drive

bushing

Clamp

Outlet flange

Inlet flange

Model 7068 RCD

* Pressure ratings apply only to heads equipped with PolyPak seals

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DHS 1400 Rotating Control DeviceThe DHS 1400 Rotating Control Device (RCD) is the Smith Services intermediate-pressure rat-ed drilling head. Its compact design and large 14 inch thru-bore make it the ideal choice when substructure height is limited. The stripper ele-ment can be easily changed independent of the bearing assembly, saving rig time and eliminat-ing the need for excess inventory on location. This product features a split body design with the bearing assembly attaching to the mount-ing spool via a heavy-duty lower clamp.

Features and BenefitsField replaceable bearing section• The mechanically energized stripper ele-• ment that provides an uninterrupted well-bore sealLarge heavy-duty tapered roller bearings to • provide low-torque rotation and load sup-portWear bushing for wellhead adapter avail-• able for use prior to installation of drilling headElastomers available for oil, gas, high-tem-• perature and water-based drilling fluidsSealed bearing assembly retrievable • through 22 ½ inch rotary table

Notes:Kelly bushings are available for most API kellys• Stripper elements are available for 2 ⅞• ", 3 ½", 4 ½", 5" and 5 ½" drill pipe (other sizes available upon request)Stationary casing stripper elements are available • from 6 ⅝" to 10 ¾" upon special order

Ordering instructions, please specify:Inlet flange size• Outlet flange size• Kelly size and shape• Drill pipe size• Drilling fluid type• Expected circulating temperature• Expected surface pressure•


Rotating test pressure 600 psi

Static test pressure 1,000 psi

Max. rpm 150 rpm

Height 39 3⁄4" - 50 1⁄4"

Max. width 38"

Bearing assy. rotary table pass through 22 1⁄2"


Rotary drive Yes

Top drive Yes

Max. pass through bearing assembly 14"


7 1⁄16" - 3000# 7 1⁄16" 7 1⁄16" - 2000/3000#

7 1⁄16" - 3000# Shorty 7 1⁄16" 7 1⁄16" - 2000/3000#

9" - 2000 / 3000# 9" 7 1⁄16" - 2000/3000#

11" - 3000 / 5000# 11 1⁄4" 7 1⁄16" - 2000/3000#

11" - 3000 / 5000# Shorty 11 1⁄4" 7 1⁄16" - 2000/3000#

13 5⁄8" - 5000# 13 5⁄8" 7 1⁄16" - 2000/3000#

13 5⁄8" - 5000# Shorty 13 5⁄8" 7 1⁄16" - 2000/3000#

Test plug

Upper clamp

Clamp bolt

Bearing assembly

Outlet flange

Inlet flange

Lower clamp

DHS 1400 RCD

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Model 8068 Rotating Control DeviceThe Model 8068 Rotating Control Device (RCD) is designed for use on large diameter wells. This prod-uct features a split body design with the bearing assembly attached to the mounting spool via clamping dogs. The mounting spool is avail-able for 13⅝ inch to 20 inch BOP bolt-on spools and 30 inch and 36 inch weld-on mounting flanges for conductor pipe.

The bearing assembly uses the same reliable bearing and seal as-sembly as the Model 7068 RCD, en-suring consistent performance.

Features and BenefitsMechanically energized stripper • element to provide an uninter-rupted wellbore sealLarge heavy-duty tapered roller • bearings to provide low-torque rotation and load supportShock cushion in the retrievable • drive bushing to absorb lateral drillstring impact, ensuring de-pendable bearing performanceElastomers available for oil, • gas, high-temperature and wa-ter-based drilling fluidsDual element adaptor to in-• crease drilling personnel safety

Notes:Kelly bushings are available for most API • kellysStripper elements are available for 2⅞• ", 3½", 4½", 5" and 5½" drill pipe (other sizes avail-able upon request)Stationary casing stripper elements are avail-• able from 6 ⅝" to 10 ¾" upon special order

Spool Technical Data

Flange Technical Data

Note: Customer welds mounting flange directly to conductor pipe

Specifications

*Pressure ratings apply only to heads equipped with PolyPak seals

Clamping dog

Seal

Outlet flange

Inlet flange

Mounting Spool




Max. rpm 150 rpm

Height (bearing assembly only) 17"



Rotary drive Yes

Top drive Yes


Inlet Flange Height Spool ID Outlet Flange

16" - 2000# 20" 16 3⁄4" 9" - 3000#

20" - 2000 / 3000# 20" 20 3⁄4" 9" - 3000#

Casing Size Height Flange ID

20" mounting f lange 6" 26 9⁄32"

30" / 36" mounting f lange 3" 26 9⁄32"

30" mounting f lange withremovable adapter ring 3 1⁄4" 28 3⁄4"

Seal

Clamping dog

Weld-on Mounting Adaptor

Drive ring

Clamp

Bearing assembly

Model 8068 RCD

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Model 7368 Rotating Control DeviceThe Model 7368 Rotating Control Device (RCD) is designed for use where space is limited, such as on workover rigs. The Model 7368 head employs the same design features as the larger Model 7068 low-pressure RCD.

Features and BenefitsMechanically energized stripper element that • provides an uninterrupted wellbore sealLarge heavy-duty tapered roller bearings to • provide low-torque rotation and load supportOne-piece combination drive bushing stripper • element that passes through a 10 ½ inch rotary tableElastomers available for oil, gas, high-tempera-• ture and water-based drilling fluids

Notes:Kelly bushings are available in 3" square and 3• 1⁄2" hexStripper elements are available for 2• 3⁄8", 2 7⁄8" and 3 1⁄2" drill pipe




Max. rpm 150 rpm

Height 23 7⁄8"


Stripper element mounting One-piece

Rotary drive Yes

Top drive Yes


Technical Data

Specifications


7 1⁄16" - 2000 / 3000 / 5000# 7 1⁄16" 4 1⁄16" - 2000 / 3000#

7 1⁄16" - 2000 / 3000 / 5000# 7 1⁄16" 7 1⁄16" - 2000#

Clamp

Outlet flange Inlet

flange

Clamp bolt

Bowl

One-piece combination drive bushing

stripper element

Model 7368 RCD


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Model 8068-G Rotating Control DeviceThe 8068-G Geothermal Rotating Control Device (RCD) has been de-signed with several unique features that enable it to operate safely in a high temperature environment. It utilizes the Model 8068 RCD bearing and drive bushing section, ensuring proven reliability and performance.

The geothermal head utilizes a split body design with the bearing sec-tion securely fastened to the spool and sealed for safe operation. The spool is equipped with a large diam-eter rubber element, designed with an ID large enough to safely seal on large diameter drillstring com-ponents such as drill collars. Spe-cial water injection ports enable the stripper elements and exposed seal faces to be cooled and lubricated by circulating water through the head when stripping in and out of the well.

Features and BenefitsMechanically energized stripper • element to provide an uninter-rupted wellbore sealLarge heavy-duty tapered roller • bearings to provide low-torque rotation and load support

All rubber components that have • been specially formulated forhigh temperature serviceDual stripper element design• Upper element that rotates with • the kelly sealing around drill pipe, tool joints and the kellyUpper stripper element that • can be changed without re-moving the bearingLower stationary element that • seals around large diameter drillstring components such as drill collarsSpool equipped with a port for • bleeding off pressure between the upper element and the closed BOPDrive bushing and stripper el-• ement retrievable through a 17 ½ inch rotary tableBearing assembly retrievable • through a 27 ½ inch rotary tableShock cushion in the retriev-• able drive bushing that absorbs lateral drillstring impact ensur-ing dependable bearing perfor-manceAvailable with either 14• inch or 15 ¼ inch thru-bore

Notes:Kelly bushings are available for most API • kellysStripper elements are available for 2 ⅞• ", 3 ½", 4 ½", 5" and 5 ½" drill pipe (other sizes available upon request)Stationary casing stripper elements • are available from 6 ⅝" to 10 ¾" upon special order




Max. rpm 150 rpm

Height 57" - 65"


Bearing assy. rotary table pass through 27 1⁄2"

Stripper rubber mounting One-piece or bolt on

Rotary drive Yes

Top drive Yes



13 5⁄8" - 3000# 14" 9"- 2000 / 3000#

16" - 2000# 16 3⁄4" 9"- 2000 / 3000#

20" - 2000 / 3000# 20 3⁄4" 9"- 2000 / 3000#

Inlet flange

Spool

Clamping dog

Bearing assembly

Clamp

Outlet flange

Model 8068-G RCD


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Rotating Control Device AccessoriesStripper ElementsAll Smith Services stripper elements are manufactured to strict mate-rial specifications and a proprietary compound formulation. Every batch of rubber is subject to multiple QA tests and verification prior to mold-ing. The stripper elements are mold-ed under conditions of controlled and documented load weight, tem-perature, cavity pressure and cure time. Once elements are molded, documentation for the entire batch of stripper elements is reviewed by an independent rubber lab, complet-ing the QA process. Smith Services builds quality and reliability into each stripper element so that "when you are under pressure you are in control.”

Stripper elements are passive seals that maintain a constant barrier between the atmosphere and well-bore. The inner diameter of stripper rubbers should always be smaller than the objects (e.g. drill pipe, tool joints) passing through to ensure sealing with zero wellbore pressure. The outer geometry of the passive

seal creates higher sealing pressure as wellbore pressure increases.

Low-pressure One-piece Combo Stripper Element

Combination drive bushing and • stripper elementReduced replacement time and • elimination of cap screwsAvailable in natural rubber, nitrile, • butyl or polyurethaneWill fit Models 7068, 8068 and • DHS 1400 RCDs

High-pressure One-piece Combo Stripper Element

Combination drive bushing and • stripper elementReduced replacement time and • elimination of cap screwsAvailable in natural rubber, nitrile • or butylWill fit the RDH• ® 2500 RCD

Standard Stripper ElementSecured to drive bushing with • cap screws and locking wireAvailable in natural rubber, • nitrile, butyl or polyurethane

Strips tools up to 8 ¾• inch ODAvailable for use on Models 7068, • 8068 and DHS 1400 RCDs

Model 7368 One-piece Combo Stripper Element

Combination drive bushing and • stripper elementReduced replacement time and • elimination of cap screwsAvailable in natural rubber, • nitrile, butyl or polyurethane

Heavy-duty Stripper ElementSecured to drive bushing with • cap screws and locking wireAvailable in natural rubber, nitrile • or high temperature compoundsStrips tools up to 8 ¾• inch ODAvailable for use on Models 7068, • 8068 and DHS 1400 RCDs

AccessoriesDual element adaptor for HOLD • 1500, HOLD 2500 and RDH 2500Stabbing mandrels• Snubbing adaptor• Logging adaptor•

Low-pressure one-piece combo stripper element

High-pressure one-piece combo stripper element

Standard stripper element Heavy-duty stripper element

Note: Contact a Smith Services representative to assist with stripper element selection.

Model 7368 one-piecestripper element

7 Rotating Control Devices

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