Wellhead assembly

Details Wellhead assembly Wellhead assembly

1997-10-15

1999-11-30

Suchfield, George

Wells

Processes

Assembling well part

166 861, 166 881, 166 892, 166 884, E21B 3303, E21B 3304

Patent

active

059925272

ABSTRACT:
A wellhead assembly in which an in-line tree (10) is landed within a wellhead housing (3). The in-line tree has a vertical production through bore (11), two hydraulically or electrically controllably in-line valves (13A, 13B) in the vertical production bore, and a lateral bore (16) leading from the vertical production through bore. A horizontal tree (20) having a vertical through bore (23) is landed on the wellhead housing (3) so that the in-line tree (20) is within the vertical bore. The horizontal tree has a lateral bore (24) which is aligned with the lateral bore (16) of the in-line tree. The in-line tree (10) can be run in and retrieved through the horizonal tree (20). Alternatively the horizontal tree (20) can be removed from the wellhead housing (3) without a BOP if the in-line valves (13A, 13B) are closed.

REFERENCES:
patent: 2546638 (1951-03-01), Humason
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patent: 3190354 (1965-06-01), Stone
patent: 3481395 (1969-12-01), Sizer et al.
patent: 4491176 (1985-01-01), Reed
patent: 4703807 (1987-11-01), Weston
patent: 5143158 (1992-09-01), Watkins et al.
patent: 5535826 (1996-07-01), Brown et al.
patent: 5544707 (1996-08-01), Hopper et al.
patent: 5865250 (1999-02-01), Gariepy
patent: 5868203 (1999-02-01), Cunningham
patent: 5873415 (1999-02-01), Edwards
Cooper Oil Tool; Phillips Petroleum Company Ann Subsea Facility; TMH0445, Nov. 1991; (pp. CCH 36064-36223).

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