Downhole drilling system
Patent
·
OSTI ID:7288101
According to the invention an improved system for the drilling of small holes from and at right angles to a vertical well hole is described. The system is directed by a ninety degree elbow attached to the downhole end of a small diameter tube section. The uphole end of the tube section is attached to the downhole end of a large diameter tubing string. A downhole electrical motor operates the drilling part of the system from inside the large diameter tubing string. The drive part of the system which operates the drill bit consists of a pump, which also provides drilling fluids to the drill bit, a small diameter drill pipe, a flexible drill pipe which operates the drill bit from around the ninety degree elbow. An electrical mechanical cable provides power to the electrical motor and hoists the electrical motor and its attachments in and out of the tubing string. An anti-torque mechanism attached to the uphole end of the electrical motor holds the electrical motor in place when the electrical motor is in operation.
- Assignee:
- TIC; ERA-03-010777; EDB-78-017560
- Patent Number(s):
- US 4051908
- OSTI ID:
- 7288101
- Country of Publication:
- United States
- Language:
- English
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