E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/82
E21B 10/00 (2006.01) E21B 10/46 (2006.01) E21B 10/60 (2006.01)
Patent
CA 1086299
A full-hole rotary bit with scraping elements (such as diamonds) and waterways in the face thereof, has the scraping elements arranged along one side of each of the waterways, Ridges are arranged to guide the mud flow through the waterways.
306633
Feenstra Robijn
Jurgens Rainer
Rohde Heino
Shell Canada Limited
Smart & Biggar
LandOfFree
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