E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/16
E21B 33/14 (2006.01)
Patent
CA 1245976
X 9636 A B S T R A C T PREVENTING FLUID MIGRATION AROUND A WELL CASING In order to prevent gas migration along the outer surface of a casing which is cemented in a well, the casing is provided with sheaths of an elastomeric foam, which sheaths are able to seal off the spacing that may be formed between the casing and the surrounding cement body. CKRH04
503622
Bol Gerardus M.
de Roo Petrus C.
Meijs Franciscus H.
Schouten Fredericus C.
Stewart Robert B.
Shell Canada Limited
Smart & Biggar
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