Well Heads

X-Mass TreeDefinition:-It is the x-over between the tubing and the flow line

It is selected depending on • rating pressure

• artificial lift used

•Loads of W/L & CTU operation.

Wellhead & BOP during completion

Casing Head Housing (CHH)

Casing Head Spool(s)

Tubing Head Spool (THS)

BOP's Stack

2- Tubing hanger (TBG HGR)

This is the device used to transfer the TBG weight to the well head & seal annulus fluids.

Types of hanger

•Mandrel type ( under compression)

•Ram type HGR ( under tension)

Hanger with extended neck and control line feed through

Seal O-Ring

TBG HGR usually has three threads1- Bottom for connection with TBG (box)2-Middle for BPV & 2WCV setting.3-Top for landing with landing joint (box).

Top thread

Middle thread

Bottom thread

Seal Ring

Body

Valve

Spring

Valve Stem

it is to seal off the tubing so that repairs or removal of the tree can be performed, or the installation or removal of blowout preventers. This particular model can be pumped through if need be. The valve is installed in a threaded profile in the tubing hanger, and has an equalizing feature to relieve any differential that may be present at the time it is to be pulled. Installation and removal of the valve should be done with the use of a special lubricator. The valve is capable of handling a 15,000 psi differential.

BPV back pressure valve

Body

Seal Ring

Valve Plunger

Retainer

O-Ring

Insert

This valve is capable of holding pressure from both directions. And, like its counterpart on the previous page, is installed in a threaded profile in the tubing hanger.it is used when the tree is pressure tested. And it can withstand differential pressures up to 15,000 psi.

2WCV two way check valve

x-mass tree

Types of x-mass tree

Solid block x-mass tree

x-mass tree

Composite x-mass tree

Sub Sea Well Head

•Tests on x-mass tree

•How can we change x-mass tree

•Safety item in x-mass tree

•Dual x-mass tree

Dual x-mass tree

Tubing head spool

Uses of TGB head spool

•Hanger place

•Access annulus A

•Base for x-mass tree

Double studded adapter flange Used as a cross over between the top of the THS and the base of X-mass treeExample:11” X 7 1/16” 5K11” X 3 1/8” 3K

Double Studded Adapter Flange(DSAF) with control line outlet