E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 49/08 (2006.01)
Patent
CA 2687849
Desroques Emmanuel
Smits Anthony
Terabayashi Toru
Tsuboi Hidenori
Umemoto Satoru
Schlumberger Canada Limited
Smart & Biggar
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