Wells – Processes – Repairing object in well
Patent
1996-05-07
1998-11-03
Dang, Hoang C.
Wells
Processes
Repairing object in well
1662427, 285351, 285917, F21B 1702
Patent
active
058295240
ABSTRACT:
A casing patch is disclosed which uses one or more fins which elastically flex to accept a casing stub. The casing stub is prepared with a dressing tool containing a special mill to obtain the requisite finish on its outer surface prior to insertion of the casing patch. The flexible fin or fins provide a metal-to-metal seal to the outer surface of the casing patch and a grip assembly holds the joint together. In certain applications, the fins can be combined with a resilient seal where the fins preferably provide a complete extrusion barrier to the resilient seals. Using the fins which preferably are integral to the body, alone or in combination with a resilient seal or seals, the wall thickness of the joint can be maintained at thicker values for a given size as compared to prior designs, thus, ensuring a sufficient pressure rating for the joint which is at least equal to the rating of the casing stub.
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Baker Oil Tools, Catalog, Fishing Services, pp. 13-16, 54, date unknown.
Composite Catalog, Bowen Packer Type Tubing and Casing Patches,Bowen Lwad Seal Tubing and Casing Patches, date unknown.
Gotco International, Inc., Casing Patch, p. 12, date unknown.
Flanders Bruce A.
Lynde Gerald D.
Macrae John
Baker Hughes Incorporated
Dang Hoang C.
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