Drill bit

Details Drill bit Drill bit

E - Fixed Constructions

21

B

E21B 10/42 (2006.01) B23P 15/28 (2006.01)

Patent

CA 2510136

A drill bit is made from a shank, lid and blades. Junk slots with higher resistance to flow are provided to force drilling fluid between cutters on adjacent blades to improve cleaning. Blades are canted back, and openings at a high angle are provided to further enhance cleaning. The use of a lid facilitates high angle openings.

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