Nested velocity string tubing hanger

Details Nested velocity string tubing hanger Nested velocity string tubing hanger

2005-06-20

2008-11-04

Gay, Jennifer H (Department: 3676)

Wells

Processes

Parallel string or multiple completion well

C166S075140, C166S097500, C166S368000

Reexamination Certificate

active

07445046

ABSTRACT:
An outer tubing hanger is secured to an outer string of tubing and landed in a wellhead housing. A Christmas tree is connected to the wellhead housing. While in a first mode, an isolation tube extends between the tree and the outer tubing hanger for conveying well fluid flowing up the outer string of tubing. The isolation tube is removed while in a second mode, and an inner tubing hanger secured to an inner string of tubing lands in the outer tubing hanger production passage. An upper portion of the inner tubing hanger extends into sealing engagement with the tree production passage for flowing well fluid up the inner string of tubing while in the second mode.

REFERENCES:
patent: 3177942 (1965-04-01), Haeber
patent: 4262748 (1981-04-01), Kirkland
patent: 5236037 (1993-08-01), Watkins
patent: 5462119 (1995-10-01), De Souza et al.
patent: 2003/0006041 (2003-01-01), Baten et al.
patent: 2003/0141071 (2003-07-01), Hosie

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