Sino Tharwa Drilling Co…

Rig St4

Eng./Rabea Zaky

Equipment

© EnCana Corporation

Purposes of the BOP Stack

• Shut in the well – Pipe in or out of the hole

• Provide a means of pumping fluids into the well under pressure

• Allow the controlled release of fluids from the well

• Allow movement of the pipe under pressure

© EnCana Corporation

Annular Preventers

• Capable of closing on various shapes and sizes of pipe including Kelley, spiral drill collars and HWDP.

• Enables pipe to be rotated or stripped while under pressure.

• Closure is wellbore pressure assisted

• Hydraulic operating pressure is regulated to enable stripping operations.

© EnCana Corporation

Annular Preventers

Annular Preventer Closed on Pipe

Courtesy Hydril

© EnCana Corporation

Annular Preventers

Hydril GK Annular Closing Sequence

Courtesy Hydril

© EnCana Corporation

Only have weep (vent) hole

Cameron type D , DL

Courtesy Cameron

© EnCana Corporation

Cameron Type D Element

Courtesy GSF

© EnCana Corporation

Annular Preventers

Shaffer Annular - Stripping Pipe

Courtesy Shaffer

© EnCana Corporation

Annular Preventers

Shaffer Annular - Stripping Assembly

Courtesy Shaffer

© EnCana Corporation

Annular Preventers

Shaffer Annular - Closing Sequence

Courtesy Shaffer

© EnCana Corporation

Ram Type Blowout Preventers

• Fixed Pipe Rams

– Designed to close and seal around the pipe body

• Blind Rams– Designed to close and seal on open hole

• Shearing Blind Rams– Designed to shear (cut) the pipe body then close and

seal the wellbore

• Variable Bore Rams– Designed to close and seal on multiple pipe sizes

© EnCana Corporation

Ram Type Blowout Preventers

• Manual Ram Locking Systems

• Automatic Ram Locking Systems• Wellbore Pressure Assisted• Designed to Hold Pressure From Bottom Only

© EnCana Corporation

Ram Preventers

Cameron Type U Ram BOP

Courtesy Cameron

© EnCana Corporation

Ram Preventers

Cameron Pipe Ram Blocks

Courtesy Cameron

© EnCana Corporation

Ram Preventers

Cameron Shear Blind Ram Blocks

Courtesy Cameron

© EnCana Corporation

Chokes© EnCana Corporation

Manifold Valves

• Must be full opening• Have an ID equal or greater than the manifold

piping• Have a working pressure greater to or equal to

the BOP’s

© EnCana Corporation

Manifold Valves - Gate Type

Courtesy Cameron

© EnCana Corporation

String Valves

Hydril Kelly Guard

Courtesy Hydril

© EnCana Corporation

String Valves

Gray Valve (non return valve)

© EnCana Corporation

String Valves

Stabbing Valve Installation Handles

Drop Down Handleson Stabbing ValvesMust Have a Second Set of Pins to Enable“Pull Down” by CrewMembers When ThisValve is Installed

The stabbing valve wrenchmust be readily available.

During winter operations thisvalve must be stored in anopen position in a warm placeand be readily accessible.

© EnCana Corporation

String Valves

Floats

Courtesy Baker Hughes

© EnCana Corporation

BOP Control Systems

1. Accumulator Bottles

2. Recharge Pump

3. Fluid Reservoir

4. N2 Back Up System

5. Controls

Major Components

© EnCana Corporation

BOP Control Systems

Accumulator Bottles

© EnCana Corporation

BOP Control Systems

Major Components

© EnCana Corporation

BOP Control Systems

Accumulator Bottle

© EnCana Corporation

BOP Control Systems

Useable Fluid

© EnCana Corporation

Factors Affecting Surge Pressures

• Speed at which the pipe is run into the hole• Mud properties• Nozzle sizes• Annulus clearances

© EnCana Corporation

String Valves

Hydril FOSV

Courtesy Hydril

© EnCana Corporation

String Valves

Gray Valve

© EnCana Corporation