Rock bit with extended pickup tube
Patent
·
OSTI ID:6298279
The three cone rock bit includes an improved circulation system for drilling fluid which increases the horizontal flow vector of the fluid adjacent the bottom surface of thr hole being drilled. A pair of nozzles, located near the hole perimeter and between adjacent pairs of drilling cones, inject drilling fluid at one side of the hole. An extended pickup tube terminating between the remaining pair of drilling cones and close to the bottom of the hole to the annulus between the hole and the drill string.
- Assignee:
- Smith International, Inc.
- Patent Number(s):
- US 4126194
- OSTI ID:
- 6298279
- Country of Publication:
- United States
- Language:
- English
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