Rotary drill bits and method of use

Details Rotary drill bits and method of use Rotary drill bits and method of use

E - Fixed Constructions

21

B

255/69

E21B 10/46 (2006.01) E21B 10/42 (2006.01) E21B 10/44 (2006.01) E21B 10/60 (2006.01)

Patent

CA 1157009

ROTARY DRILL BITS AND METHOD OF USE Abstract of the Disclosure The invention relates to a rotary drill bit used to drill holes in subsurface formations to extract oil, gas or water or in mining or in the removal of cores. The bit has a body, a passageway in the body for a drilling fluid opening at an external surface of the body, elements mounted on the external surface for cutting or abrading the formation, and several fluid channels extending from the passageway opening and past some of the elements. The drill bit has only one or two fluid unbranched channels arranged to cause the fluid to flow past a plurality of the elements. This arrangement of the fluid channels removes cuttings with improved efficiency and provides other advantages.

368628

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