Thru-tubing anchor seal assembly and/or packer release devices

Details Thru-tubing anchor seal assembly and/or packer release devices Thru-tubing anchor seal assembly and/or packer release devices

1997-07-03

1999-07-20

Tsay, Frank

Wells

Processes

Placing or shifting well part

1661176, E21B 2302

Patent

active

059244917

ABSTRACT:
A configuration is provided to anchor the tubing string into a polished-bore receptacle while providing the ability to disconnect the tubing string from the polished-bore receptacle in a single trip in the wellbore. The configuration of the anchor provides for metal-to-metal sealing, and the disconnection is accomplished by a penetrating tool which accesses an annular cavity to unsupport locking dogs which facilitate removal of the tubing string from the polished-bore receptacle with applied pressure. If the packer needs to come out for any reason, a retrieving tool is described which, in a single trip, allows the retrieving tool to be advanced thru-tubing into the packer itself to unlock it. The retrieving tool is pulled out of the tubing and a pick-up force is applied to the tubing string to extend the packer to allow for its ultimate removal with the tubing.

REFERENCES:
patent: 4089548 (1978-05-01), Gurley
patent: 4290484 (1981-09-01), Beall et al.
patent: 4383578 (1983-05-01), Baker
patent: 4399873 (1983-08-01), Lindsey, Jr.
patent: 4540047 (1985-09-01), Akkerman
patent: 4612985 (1986-09-01), Rubbo et al.
patent: 4726421 (1988-02-01), Akkerman et al.
patent: 4971365 (1990-11-01), Schultz
patent: 4993493 (1991-02-01), Arnold
patent: 5518072 (1996-05-01), McTernaghan

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