E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/63
E21B 33/12 (2006.01) E21B 23/00 (2006.01) E21B 23/06 (2006.01) E21B 33/129 (2006.01)
Patent
CA 1276875
Abstract A tieback packer apparatus and method for packing a well annulus above a gravel packed liner screen. The packer includes a body with a mandrel slidingly disposed therein. Originally, the mandrel is shearably pinned to the body. The body includes a lower packer support for a packer ele- ment annularly disposed around the mandrel. An upper packer support is also shearably pinned to the mandrel and includes a wedge. A plurality of slips are positioned above the wedge. Downward motion of the mandrel shears the shear pins and transfers force through a spring, thus forcing the slips toward the wedge and outwardly into gripping engagement with the well bore. The spring keeps the slips engaged while preventing excessive slip drag. Further downward movement of the mandrel sets the packer element into sealing engage- ment with the well bore. The packer may be retrieved by reengaging the releasing mechanism. Lifting sequentially unsets the slips, as well as unsetting the packer element.
528155
Haliburton Company
Swabey Ogilvy Renault
LandOfFree
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