SU-90 Series Unitized Surface Wellhead System

8/8/2019 SU-90 Series Unitized Surface Wellhead System

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SU-702™SURFACE WELLHEAD SYSTEMS

efficient, cost-effectivesystems for standard

applications

SINGLE-STACK

DUAL-STACK

MULTI

-SLOT

withVertical or

HorizontalProduction

Trees

SU-902™

SURFACE WELLHEAD SYSTEMS

for high pressure, severeservice applications

SINGLE-STACK

DUAL-STACK

MULTI-SLOT

withVertical

Production

Treesavailable in a

wide range of

pressures

for all standard

BOP sizes

in 1 Stack or 2

Stack Systems

for platform,

jack-up or land

applications.

SU SERIES UNITIZED WELLHEADS SYSTEMS



SYSTEM VERSATILITY

At the core of each DRIL-QUIP SU Series UnitizedWellhead System is a unique surface wellhead thatincorporates subsea wellhead metal-to-metal sealingtechnology, providing benefits not available in typicalsurface wellhead systems.

• Compact size and time-saving features make the SUSeries Unitized Wellhead Systems the technical andeconomic choice

• The SU Series Unitized Wellhead Systems providea means of utilizing mandrel casing hangers withmudline suspension

• The SU Series Unitized Wellhead Systemssimplify rig operations by replacing spooledwellhead components

• System flexibility allows adaptation to mostcasing programs

• Annulus seal is pressure-energized and can beretrieved and replaced without disturbing thecasing hanger or tubing hanger

• Mandrel-type casing hangers simplifyinstallation process

• Fully compatible with mudline suspension systemswith patented adjustment sub

• Adjustment in height and tension to ensurewellhead systems on platforms can be installedto identical height

• Metal-to-metal seals can be pressure tested externallyas part of an ongoing maintenance program throughthe life of the well

• Annulus seal is pressure-energized and can betested from inside the wellhead during drillingoperations and outside the wellhead formaintenance program

• Offered with a “stuck casing” solution that

maintains full system metal-to-metal sealingwithout compromise

• Fire-resistant production tree designs offered incompliance with API 6FA, API 6FB and API 6FC

• SU-90® systems can be specified to operate within atemperature range of -75 F to 350 F and upto 15,000 psi

• Field-proven performance

DESIGN AND ANALYSIS

DRIL-QUIP ' S Research andDevelopment Department isequipped with a sophisticatedcomputer network. The SU-90Wellhead System componentshave been designed and modeledusing the most advanced computertechniques. Each wellhead

component has undergonerigorous engineering analysis andtesting. Prototypes of each systemcomponent have been extensivelytested to confirm that the product meets the design criteria.This underlines DRIL-QUIP ' S commitment to provide advancedtechnology in precision-crafted products for the oil industry.

All DRIL-QUIP SU Series UnitizedWellhead Systems are engineeredand designed in compliancewith API 6A guidelines whereapplicable, and can be supplied incompliance with European UnionExplosive Atmospheres Directive(ATEX) and EPS regulations.

DRIL-QUIP SU Series Wellheadsare manufactured in accordance

with API Q1 and ISO-9001standards and specifications.

1



The SU-90® Platform Wellhead System isavailable in a single or multiple BOP stackconfiguration. Casing heads are designed toprovide technical and operational flexibility

without sacrificing the pressure-containing orload-carrying capacity of the system.

The low pressure SU-90 Casing Head can be equipped with an adjustment ring foradjusting tension or height as required on theprimary conductor string.

The high-pressure wellhead can be landed,adjusted, locked and sealed inside thecasing head.

The low-pressure casing head is run on asimple drill pipe or full-bore installation tool

and can be supplied with customer-specifiedside outlets and top connections.

FEATURES

• Low profile, compact design

• Provision for optional circulation paths

• Adjustable landing ring

• External test ports allow for quick testingof the seal assembly with or without BOPstack in place

• Threaded bottom connections in casinghead provide quick installation; no fieldwelding required

Casing Heads are available

in a variety of sizes:

21 1 / 4" – 2,000 psi

20 3 / 4" – 3,000 psi

18 5 / 8" – 5,000 psi

2

CASING HEADS

Casing Head Installations



The high-pressure wellhead provides ameans of suspending and sealing multiplestrings of casing and tubing inside a singlewellhead using mandrel hangers.

The high-pressure SU-90 Wellhead isdesigned to land in either the low-pressurecasing head or on the primary conductorcasing. In both cases the wellhead can beadjusted for height or tension as required.Additionally, the high-pressure wellhead can

be sealed in the casing head, if desired. Sideoutlets and top connections can be suppliedto meet customer specifications.

FEATURES

• Low profile, compact design• Provision for optional circulation paths

• Adjustable landing ring

• External test ports allow for quicktesting of the seal assembly with orwithout BOP stack in place

• Interfaces with tubing hanger with ametal-to-metal seal

• Available with a threaded bottomconnection in order to provide quickinstallation; no field welding required

Wellheads are available

in a variety of sizes:

13 5 / 8" – 5,000 psi

13 5 / 8" – 10,000 psi

13 5 / 8" – 15,000 psi

18 3 / 4" – 5,000 psi

18 3 / 4" – 10,000 psi

18 3 / 4" – 15,000 psi

3

HIGH PRESSURE WELLHEADS



MANDREL TYPE

CASING HANGERS

The SU-90 Unitized Wellhead Systems utilizemandrel type casing hangers. These casinghangers incorporate field-proven subsea tech-nology for landing, sealing and locking casinghangers to the wellhead without externalintervention. These operations are performedthrough the BOP stack.

FEATURES

• High load-carrying, pressure-containing capacity

• Designed for a radially preloadedmetal-to-metal sealing system on theannulus seal assembly

• Large flow-by areas during runningand cementing

• Locks the casing hanger automatically tothe wellhead

NOMINAL BORE PROTECTORS

AND WEAR BUSHINGS

The SU-90 Nominal Bore Protector and WearBushing protect the wellhead ID duringthe drilling operation. The Bore Protector isretained into the wellhead and starter headwith a friction bind O-ring seal. The WearBushing is locked down to the seal assemblywith 4 J-lugs mated to slots on the OD of theseal assembly torque nut.

FEATURES

• Protects the metal-to-metal sealing surfaceinside the casing head and wellhead

• Easily installed and retrieved withcombination tool

• BOP stack can be tested with wear bushings installed

Wellhead Hanger Casing Head Hanger

Wear BushingsNominal Bore Protectors

4

CASING HANGERS ,NOMINAL BORE PROTECTORS AND WEAR BUSHINGS



SEAL ASSEMBLIES

The SU-90 Seal Assembly incorporates a metal-to-metal sealing system that was developed for,and field-proven in, DRIL-QUIP’S SS-15 SubseaWellhead System. Metal-to-metal seals locatedon the seal assembly ID and OD are drivenover a radial surface to energize the annulusseal. The sealing system is radially preloaded.Each seal assembly has two sealing systems forredundancy and to allow testing of the annulusseal from outside the casing head or wellhead.

FEATURES

• Field-proven, dual metal-to-metal seals

• Simple remote installation

• Interchangeable seal assemblies fit all casinghangers within a given wellhead size

• High pressure-containing capacity

Seal Assemblies are weight-set, pressure-assisted

Wellhead Seal Assembly

Casing Head Seal Assembly

5

SEAL ASSEMBLIES



The SU-90 Tubing Hanger can be installedon top of the production casing hangeror can be nested inside the productioncasing hanger. The SU-90 Tubing Hanger

accommodates either single-string or multi-string tubing completions.

FEATURES

• Simple installation

• High-load, high-pressure capacity

• Designed for radial-set metal-to-metal seal

• Large flow-by areas

• Tubing hangers can be landed on top of ornested inside a casing hanger

• Metal-to-metal seals provided onextended neck between tubing hangerand tree adapter

• Tubing hanger and seal assembly arehydraulically set

• Ported for SSSV control lines, chemicalinjection lines and downhole moni-toring equipment

• Field-proven design

Tubing Hanger

OPEN

OPEN OPEN

Single-String Tubing Hanger

6

TUBING HANGER



The SU-90 Tubing Hanger Running Tool is a hydraulictool that can run the tubing hanger and annulus sealin a single trip. DRIL-QUIP can offer the tubing hangerrunning tool in a configuration that accommodates

either single-string or multi-string tubing completions.

FEATURES

• High-load, high-pressure capacity

• Tubing hanger and seal assembly arehydraulically set

• Ported for SSSV control lines, chemical injectionlines and downhole monitoring equipment

• Allows communication with downhole safetyvalve throughout the installation process

• Field-proven design

7

TUBING HANGER RUNNING TOOL



Running Tools

COMBINATION TOOL

• Drill pipe tool runs and retrieves nominal boreprotector and all wear bushings within a givenwellhead size

• Tests the BOP stack with or without wear bushings installed

• Cup tester accessories allow tool to test theseal assembly and BOP stack with wear

bushing installed

CASING HEAD

RUNNING TOOL

• Threaded running toolavailable with either drillpipe connection or full-

bore configuration

• Available as a clutch typetool for mudline operation

UNITIZED WELLHEAD

RUNNING TOOLS

• Threaded running tool availablewith either drill pipe connectionor full-bore configuration

• Available as a clutch type toolfor mudline operations

Casing Head

Running Tool

(211 / 4" ; 20 3 / 4")

Wellhead

Running Tool

(18 3 / 4" ; 135 / 8")

Combination Tool

(20 3 / 4" ; 21 1 / 4" ;

18 3 / 4" ; 13 5 / 8" ;

75 / 8" ; 7")

Alternative Running Tool sizes available upon request 8

RUNNING TOOLS

Wellhead, Casing Hanger

and Combination

Running Tools



SEAL ASSEMBLY

RUNNING TOOL

• Drill pipe tool runs all sealassemblies within a givenwellhead size

• Sets all seal assemblies using

either pressure or torque• Tests seal assembly and BOP

stack in the same trip

• Retrieves seal assemblyif necessary

FULL BORE CASING HANGER

RUNNING TOOL

• Threaded full-bore running toolavailable in each casing hanger size

CLUTCH TYPE

RUNNING TOOLS

• Available as casing head, unitized well-head and casing hanger running tool

• SU-90 Unitized Wellhead Systems can beused with mudline suspension systems,which may require rotation of the mud-line running tool and the riser string foropening/closing wash ports; clutch typerunning tool allows left- or right-handriser rotation while transmitting torquewithout disengaging from the hanger,casing head or wellhead

Seal Assembly

Running Tool

(18 3 / 4" ; 13 5 / 8")

Clutch Type Casing

Hanger Running Tool

(18 3 / 4" ; 13 3 / 8" ; 103 / 4" ;

9 5 / 8" ; 75 / 8" ; 7")

Casing Hanger Running Tool

(18 3 / 4" ; 133 / 8" ; 103 / 4" ;

9 5 / 8" ; 75 / 8" ; 7")

Alternative Running Tool sizes available upon request 9



SERIES DH, DHS, DM

AND DL GATE VALVES

The DRIL-QUIP series DH, DHS, DM, and DLGate Valves are bidirectional sealing gatevalves designed to offer maximum reliabilityfor extended service in the field. All DRIL-QUIP gate valves are manufactured in accordancewith API and ISO-9001 quality standards,and are available in four styles, all qualifiedto API 6A PR2:

SERIES DH GATE VALVES

• Bore sizes 2 1/16" through 7 1/16", andpressure ranges 2,000 to 15,000 psi

• Metal-to-metal seat seals and non-elastomeric stem packing

• Available in API 6A material classes AA to HH, and PSLlevels 2 to 4

• Fire-resistant designs per API 6FA and 6FC

SERIES DHS GATE VALVES

• Bore sizes 2 1/16" through 7 1/16", and pressure ranges 2,000 to15,000 psi

• Metal-to-metal seat seals and non-elastomeric stem packing

• Unique split gate design reduces torque requirements andfacilitates simultaneous testing of the upstream and down-stream seats with the valve in the closed position

• Available in API 6A material classes AA to HH, and PSLlevels 2 to 4

• Fire resistant designs per API 6FA and 6FC

SERIES DM GATE VALVES

• Bore sizes 2 1/16" through 7 1/16", and pressure ranges 2,000 to10,000 psi

• Metal-to-metal seat seals and elastomer stem packing

• Available in API 6A material classes AA to FF, and PSLlevels 2 to 4

SERIES DL GATE VALVES

• Bore sizes 2 1/16", 2 9/16", and 3 1/8", and pressure ranges2,000 to 5,000 psi

• Resilient/elastomer seat seals and resilient stem packing

• Available in API 6A material classes AA and DD, PSLlevels 1 and 2

SERIESPressureRatings

(psi)

Sizes

API Material

Classification

Body

Construction

Gate-to-Seat

Seal

Seat-to-Body

Seal

Bonnet-to-

Body Seal

Stem Seal

Temperature

Range

DH / DHS* DM DL5,000 / 6,000 /

10,000 / 15,000

2 1 / 16" to 7 1 / 16"

AA to HH

Forged

Metal-to-Metal

with Tungsten

Carbide

Hardfacing

PressureEnergized Metal-

to-Metal with

Teflon® Second-

ary Seals

Metal-to-Metal

with Nitriding or

Tungsten Carbide

Hardfacing

PressureEnergized

Metal-to-Metal

with Elastometric

Secondary Seals

Resilient

Face Seal

Elastometric

2,000 / 3,000 /

5,000 / 10,000

2 1 / 16" to 7 1 / 16"

AA to FF

Forged

2,000 / 3,000 /

5,000

2 1 / 16" to 2 9 / 16"

and 3 1 / 8"

AA to DD

Forged or Cast

Pressure

Energized

Metal-to-Metal

Spring Pressure

Energized Teflon®

-35°F to 250°F

Flat Gasket

Metal-to-Metal

Elastometric

Flat Gasket

Metal-to-Metal

Resilient

-35°F to 250°F

MANUALLY OPERATED GATE VALVE

* The Series DHS is the split gate version of the Series DH Gate Valve

10

SERIES: DH, DHS, DM AND DL GATE VALVES



FIRE-SAFE GATE VALVES –

MODELS 6FC AND 6FA FEATURES

• Designs meet standard API specifications

• Metal-to-metal seat-to-body and seat-to-gate seals

• Fire-resistant bonnet design

• The 6FA model is avail-able for DRIL-QUIP split gate valves

BONNET FEATURES

• The Valve is designedso the stem-to-bonnet

metal-to-metal backseatwill engage in a fire. Thisis to eliminate the pos-sibility of the packing

burning out and creatinga new fuel source forthe fire. All other com-ponents are designed towithstand the half-hour

burn and cooldownwithout leaking. Thepressurized valve mustnot show any significant

leakage during the test.

• The Metal-to-Metal DX® Bonnet Seal ispressure energized and will not leak dueto high temperatures.

• A Nut Shroud is added to protect the bonnet bolting from direct flame.

• A Eutectic Ring is positioned above the upper bearing face and will melt in the event of afire, or if the temperature exceeds 250°F. If thisoccurs, valve body pressure forces the stemupward and a metal-to-metal backseat seal is

engaged. This seal isolates the valve bore and body pressure from the stem packing.

• A Spring Cartridge is used to engage the stem’s backseat when the Eutectic Ring has meltedand there is no or low body pressure in thegate valve.

SIGNIFICANT DESIGN FEATURES

OF THE API 6FA DESIGN

• Components of the pressurized valvecan withstand a half-hour burn and

cooldown and one-time operation withoutsignificant leakage

• The Stem Packing is made up of a high-tem-perature Teflon®*-and-metal backup ring thatcan withstand the heat of a half-hour burn

*Teflon is a registered trademark of DuPont

Upper RollerBearing

Eutectic Ring

Spring Cartridge

Lower RollerBearing

Gland Nut

StemPacking

Nut Shroud

MechanicallyEnergized SelectiveBackseat

6FC Fire-Resistant Design on Slab Gate Valve

Metal-to-Metal

DX Bonnet Seal

PressureEnergized

Selective

Backseat

Stem Roller

Bearings

Nut Shroud

Gland Nut StemPacking

Eutectic Ring

6FA Fire-Resistant Valve Design

11

DHF SERIES FIRE-SAFE GATE VALVES



Production Trees

DRIL-QUIP offers a Multi-Slot Wellhead Sys-tem that integrates two or more wellheadsinside of one conductor string. Each spe-cially designed wellhead system incorporates

features of our field-proven SU-90 or SU-702Unitized Wellhead Systems.

DRIL-QUIP’S Multi-Slot Wellhead Systemincludes double and triple well or producingzone completions. The Multi-Slot Wellhead isavailable in vertical or horizontal tree configu-rations and can accommodate stack valve or

block valve tree designs.

FEATURES

• Maximizes conductor slot utilization

• Compact wellhead design saves space

• Space-saving feature results in smallerplatform size requirements

• Fewer connections reduce possible leakpaths and save BOP nipple-up/nipple-down time

• Weight-slip hangers for surface casing;mandrel hangers optional

• Available for standard or H2S service

• Simple control line termination block

assemblies• Each well can be drilled and completed

independently

• Compatible with surface horizontalcompletion trees

• Field-proven system performance

12

MULTI-SLOT WELLHEAD SYSTEMS

Depiction of

conventional

Multi-Slot Two-

Wellhead System

with Stacked Valve

Production Trees



OPEN

OPEN OPEN OPEN

OPEN OPEN

OPEN OPEN

OPEN

OPEN

O P E N

O P E N

O P E N

O P E N

O P E N

O P E N

OPEN

OPEN

O P E N

OPEN

O P E N

O P E N

PE

PE PE PE

PE PE

PE PE

PE

PE

E

E

E

E

E

E

PE

PE

E

E

E

E

13

Depiction of Dual Zone

Multi-Slot Two-Wellhead

System with Block Valve

Production Trees

Depiction of

Multi-Slot Three-

Wellhead System

with Block Valve

Production Trees



Documents

SU-90 Series Unitized Surface Wellhead System