E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/00 (2006.01) E21B 34/14 (2006.01) E21B 21/00 (2006.01) E21B 34/00 (2006.01)
Patent
CA 2376806
A tool string for use in a well to retrieve a completion string while maintaining control of a well without having to kill the well (i.e., without having to exceed formation pressure) each time the string is retrieved.
Mescall Stephen
Milligan Clay W. Jr.
Read Dennis M.
Wetzel Rodney J.
Schlumberger Canada Limited
Smart & Biggar
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