E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 37/00 (2006.01) E21B 23/00 (2006.01) E21B 23/02 (2006.01) E21B 37/10 (2006.01) E21B 43/12 (2006.01)
Patent
CA 2070870
A stop for an oil well swabbing device which is economical to use, is readily positioned in the well casing at the desired level, and is readily removable with a conventional fishing tool.
Coyle Gary W.
Concoyle Oilfield Tools Inc.
Smart & Biggar
LandOfFree
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