Apparatus and method for hanging coiled tubing in wells

Details Apparatus and method for hanging coiled tubing in wells Apparatus and method for hanging coiled tubing in wells

1994-10-31

1995-11-21

Schoeppel, Roger J.

Wells

Processes

Assembling well part

E21B 1900

Patent

active

054678250

ABSTRACT:
A dognut for use in the installation of a string of coiled tubing in an oil or gas well features a construction and assembly which enables the dognut to be installed on the tubing, the dognut and tubing to be landed in place in the tubing spool, the dognut seal to be activated and the assembly of the dognut, dognut seal, tubing and tubing spool to be pressure tested for leakage prior to cutting the coiled tubing above the dognut and putting the wellhead under pressure from the producing formation. This dognut installation adds to the safety and ease of completing the coiled tubing installation in oil or gas wells.

REFERENCES:
patent: 3690381 (1972-09-01), Slator et al.
patent: 4515220 (1985-05-01), Sizer et al.
patent: 4585061 (1986-04-01), Lyons et al.
patent: 5012865 (1991-05-01), McLeod
patent: 5103900 (1992-04-01), McLeod et al.

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