E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/3, 166/5
E21B 25/04 (2006.01) E21B 4/14 (2006.01) E21B 25/02 (2006.01)
Patent
CA 1208198
ABSTRACT OF THE DISCLOSURE The present invention provides a percussion actuated wire line sampler for use in a drill string.
457867
Andresen Arild A.
Sollie Steinar
Chevron Research And Technology Company
Smart & Biggar
LandOfFree
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