Nutating drill bit
Patent
·
OSTI ID:5838647
The invention discloses a nutating earth drilling bit which is adapted for use in drilling systems in which the drilling fluid and cuttings are transported from bit to surface through the interior of the drill string. The nutating bit is provided with a toroidal cutting member and a longitudinally extending annular shank, both of which have longitudinally extending passageways aligned with one another and in flow communication with the central return conduit of the drill string. The cutting member of one embodiment has a segmented cutting web at its lower end which divides the central passageway into three separate fluid return channels. Another embodiment drills an annular hole face around an uncut earth core, the core being permitted to rise into the shank member where it is broken into short segments by a core breaker. 18 claims.
- Assignee:
- Walker-Neer Manufacturing Co.
- Patent Number(s):
- US 4168755
- OSTI ID:
- 5838647
- Country of Publication:
- United States
- Language:
- English
Similar Records
Method for drilling and coring
Drill bit with wear indicating feature
Rotary drill bit and method of forming bore hole
Patent
·
Tue May 11 00:00:00 EDT 1971
·
OSTI ID:5666721
Drill bit with wear indicating feature
Patent
·
Mon Nov 21 23:00:00 EST 1988
·
OSTI ID:6386852
Rotary drill bit and method of forming bore hole
Patent
·
Mon Nov 19 23:00:00 EST 1979
·
OSTI ID:5230621