Downhole electrical core drilling system
Patent
·
OSTI ID:5072381
A downhole electric core drilling system is described that is lowered into a well hole by an electric cable to drill a core sample or to drill a well hole. The system consists of a core bit, core barrel, and a reduction transmission powered by an electric motor. This assembly is attached to the downhole end of a drill collar, which has its up hole end attached to the electric cable, which is used to raise and lower the system in a well hole and provide electric power to the system. The core barrel contains a mechanism, which when activated by a drilled core, cuts the drilled core from the formation from which it was drilled, and holds the drilled core in the core barrel while the system is hoisted to the top of a well hole. (7 claims)
- Assignee:
- EDB-82-160457
- Patent Number(s):
- US 3837412
- OSTI ID:
- 5072381
- Country of Publication:
- United States
- Language:
- English
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