Wellhead retrieval tool assembly

Details Wellhead retrieval tool assembly Wellhead retrieval tool assembly

1994-08-26

1995-12-12

Dang, Hoang C.

Wells

Above ground apparatus

With assembly or disassembly means

166 98, 166237, 294 8618, 294 8625, E21B 2300

Patent

active

054741246

ABSTRACT:
A wellhead retrieval tool assembly for retrieving a check valve has a spear formed as a solid ring at the bottom with free fingers extending upward. The fingers are resilient and have protrusions adapted to engage a retrieval groove in the check valve. A wedge ring is provided on the tool body to positively lock the fingers in radially outward engagement with the retrieval groove. The wedge ring is fixed to the body by a shear pin so that upon a predetermined axial force the pin shears and releases the wedge allowing withdrawal of the tool assembly.

REFERENCES:
patent: 2994280 (1961-08-01), Daffin
patent: 3645328 (1972-02-01), Greene, Jr.
patent: 3856081 (1974-12-01), Canalizo
patent: 3874447 (1975-04-01), McGowen, Jr.
patent: 4153111 (1979-05-01), Lans et al.
patent: 4254983 (1981-03-01), Harris
patent: 4625381 (1986-12-01), Gravonia, Jr. et al.
patent: 4793411 (1988-12-01), Zunkel
patent: 5145228 (1992-09-01), Boyle

Affiliated with

Also associated with

Rating

Wellhead retrieval tool assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wellhead retrieval tool assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wellhead retrieval tool assembly will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1354615