GE Oil & Gas

Where risers or rig floor limitations drive you to welding on a conventional casing head, the SCH1 Casing Head is a cost-effective alternative. Run with the surface casing string through the riser and using normal cementing operations, the SCH1 casing head is immediately available for BOP nipple-up when the riser is removed. Eliminating the casing head weld:

• improves safety, • saves valuable rig time, and • facilitates multi-well drilling programs from a common

location by eliminating “hot” operations.

By installing the support ring below the SCH1, the surface casing is supported by the conductor casing, eliminating the wait-on-cement (WOC) time associated with conventional equipment.

More time can be saved by removing the riser and attaching the BOP stack to the casing head with the optional DVC speed connector. The use of the DVC connector saves additional nipple-up time during drilling. If the DVC speed connector is not used, the threaded-on hold-down flange can be attached to the casing head and the BOP will be made up with a traditional flange. Once the hold-down flange is installed, this head has the same profile as a conventional head, allowing the use of standard components above it.

With the pre-installed pup joint (nipple), no WOC time, and the use of the DVC speed connector, our customers can expect to save in excess of 10 hours of valuable rig time, per well.

Features — • No welding required to install riser on conductor

• No waiting on cement required when running surface casing

• Installed through drilling riser as part of surface casing string

• No welding required to install the casing head

• Allows normal cementing operations including “top-off”

Time-Saving WellheadsPressure Control SCH1 Casing Head

Top Flange Size

Top FlangePressure (psi)

Surface Casing

Production Casing or Tubingless

Completion (TLC)Minimum Riser ID

9”3,000

7-5/8” 2-7/8” thru 5”

13-5/8”8-5/8” 2-7/8” thru 5-1/2”

5,0007-5/8” 2-7/8” thru 5”8-5/8” 2-7/8” thru 5-1/2”

11”3,000

8-5/8” 2-7/8” thru 5-1/2”

15-3/8”9-5/8” 2-7/8” thru 7”

5,0008-5/8” 2-7/8” thru 5-1/2”9-5/8” 2-7/8” thru 7”

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Hold-Down Flange

Split Support Ring

Conductor

Surface Casing

Production Casing

DVC Connector Profile

Landing Ring

• Field-proven DVC adapter provides safe BOP nipple-up and nipple-down in a few minutes

• Standard W2 bowl profile accepts entire family of W casing hangers for a wide range of production casing sizes

• Accepts all T and MTH2 tubing heads for 3,000, 5,000 or 10,000 psi working pressures

Availability —

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Key Stages of SCH1 Installation —

No Welding Needed • Riser assembly is made up or removed

in five minutes, without welding or cutting torches

• The diverter adapter remains on the riser assembly from well to well

Stage 1

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Riser height and flowline are custom fabricated for each rig.

Drilling Surface Hole

Riser Drain Valve(Recommended)

Riser

LRC RiserConnector

1” LPSight Port

Landing Ring Run in ALL6 Set Screws

O-Rings

Ground Level

Conductor

Time Saving • No “wait-on-cement” time

• Riser assembly lifts off quickly

• Cement can be “topped off”

• No welding time to install casing head

Stage 2

295-3535_2

Hang Off Surface CasingAND Casing Head

Running Tool

SCH1 Casing Head

Cement Seal

Verify LandingThrough Sight Hole

Pup Joint

2” LP Flush Plug

Split Support Ring With Circulation Flutes

Surface Casing

Conductor

Variety of Options for Fracturing and Completion

• For 9” SCH1 casing head, any tubing head with 9” 3,000 or 9” 5,000 API bottom can be installed

• For 11” SCH1 casing head, any tubing head with 11” 3,000 or 11” 5,000 API bottom can be installed

• Tubing heads may be – Type ‘T’ – Type ‘T’ prep for fracturing sleeve – MTH2

Stage 4

295-3535_4

Surface Casing

Conductor

Production Casing

Install Any API FlangedTubing Head

3,000 psi or 5,000 psiHold-Down Flange

Time Saving and Improved Safety • Outlet valves, etc. are installed

• DVC adapter attached to the BOP is made up or removed in 10 minutes, without studs or hammer wrenches

• The DVC adapter remains on the BOP stack from well to well

Stage 3

295-3535_3

Drilling Production Hole

Conductor

Surface Casing

27.79”

Drive Screws

Wear BushingRetainer Screws

BOP Stack

Test Port

Lock Ring(Engaged)

SCH1 Casing Head