Guided earth boring tool
Patent
·
OSTI ID:5337049
This patent describes a controllable tool for drilling holes in soft earth. The tool comprising an elongated rigid supporting drill rod or pipe, means supporting the drill rod or pipe for earth boring or piercing movement, including means for moving the drill rod or pipe longitudinally for penetrating the earth, means for rotating the drill rod or pipe while penetrating the earth, and means for controlling the direction of movement of the drill rod or pipe along a straight or curved path. The drill rod or pipe moving and rotating means being constructed to permit addition and removal of supporting drill rod or pipe during earth penetrating operation, an earth piercing member of substantially cylindrical shape. The tool being operable to penetrate the earth upon longitudinal movement of the drill rod or pipe by the longitudinal rod or pipe moving means, and the direction controlling means comprising means causing drill rod or pipe movement in a curved path through the earth when the rod or pipe is not rotated and causing drill rod or pipe straight line movement when the rod or pipe is rotated.
- Assignee:
- Gas Research Institute, Chicago, IL
- Patent Number(s):
- US 4858704
- Application Number:
- PPN: US 7-094937A
- OSTI ID:
- 5337049
- Country of Publication:
- United States
- Language:
- English
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