Wells – Processes – Placing or shifting well part
Patent
1991-07-18
1993-03-30
Bui, Thuy M.
Wells
Processes
Placing or shifting well part
166206, E21B 2300
Patent
active
051975467
ABSTRACT:
An anchor is disclosed which is engageable by application of a downward load which allows collets having a thread form to engage a thread form on a packer body. Further letting down on the tool locks in the collets anchoring the tubing string. Release is accomplished by an upward pull which shears a ring which frees the collets for inward movement thereby allowing release from the packer body. An additional feature of the apparatus is that it permits initial contact and disengagement prior to shearing shear screws holding the apparatus in its initial position. Thus, if insufficient tubing is available at the surface upon initial engagement with the packer, the tool may simply be pulled up to permit the addition of a pump joint at the surface. With the pup joint added, the string can then be lowered for latching leaving enough room at the surface to attach the tubing hanger.
REFERENCES:
patent: 4995464 (1991-02-01), Watkins et al.
patent: 5080173 (1992-01-01), Brammer
patent: 5086845 (1992-02-01), Baugh
Baker Hughes Incorporated
Bui Thuy M.
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