Y-body Christmas tree for use with coil tubing

Details Y-body Christmas tree for use with coil tubing Y-body Christmas tree for use with coil tubing

2005-02-08

2005-02-08

Neuder, William (Department: 3672)

Wells

Submerged well

Wellhead

C166S077200, C166S095100

Reexamination Certificate

active

06851478

ABSTRACT:
The invention provides a Y-body Christmas tree for use with coil tubing and other wellhead components which integrates components of a Christmas tree, while providing for coil tubing access without necessarily adding to the vertical height of the unit. The Y-body Christmas tree includes firstly, a body formed as a single piece of steel and forming a vertical bore extending axially therethrough, wherein the body comprises in sequence from the bottom to the top:i) a bottom connector for connecting to a wellhead component located therebelow;ii) a first valve housing section forming a side opening communicating with the vertical bore;iii) a flow tee housing section forming at least one side opening communicating with the vertical bore, for producing well flow; andiv) a top connector for connecting to a wellhead component located thereabove. The Y-body Christmas tree also includes a first shut off valve located in the first valve housing for controlling well flow through the vertical bore, a coil tubing bore formed in the body which intersects and connects to the vertical bore below the first valve, and which extends upwardly at an angle from the vertical bore sufficient to feed coil tubing; and a coil tubing head assembly communicating with the coil tubing bore for inserting, sealing and suspending the coil tubing therein.

REFERENCES:
patent: 3139932 (1964-07-01), Johnson
patent: 4154299 (1979-05-01), Winders
patent: 6457530 (2002-10-01), Lam et al.
patent: 2268223 (1999-04-01), None
patent: 2310236 (2001-12-01), None
Wellhead Control Products,Capillary Equipmentproduct brochure Available online at <http://www.wellheadcontrol.com/capillary.htm> (date accessed Mar. 31, 2003).
Select Energy Systems,Capillary Tubing Hangerproduct specification, Oct. 29, 2002.

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