Water separator and backflow valve

Details Water separator and backflow valve Water separator and backflow valve

E - Fixed Constructions

21

B

255/73

E21B 10/18 (2006.01) E21B 10/24 (2006.01) E21B 21/00 (2006.01) E21B 21/10 (2006.01) E21B 21/16 (2006.01) E21B 41/00 (2006.01)

Patent

CA 1203529

ABSTRACT OF THE DISCLOSURE A backflow control system for use in a gas circu- lation roller cone rock bit is disclosed wherein a single unit combination liquid-separator and positive action poppet check valve is used to restrict the en- trance of water into roller cone bearings during drill- ing and to restrict the ingestion of detritus into the bearings and into the bit chamber during drilling inter- ruptions. A quick-change mounting permits easy transfer of the valve unit from bit to bit.

434850

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