Drilling apparatus and cutter
Patent
·
OSTI ID:5323276
This patent describes a drilling apparatus. The apparatus comprising: a body having a bore therethrough and at least one longitudinal slot in its wall; an arm pivotally mounted at its upper end to one of the slots of the body. The arm including pin means integrally formed at the lower end thereof to form a one-piece arm and pin assembly; a cutting having formation cutting means around its outer periphery, a central bore extending partially therethrough having an annular side wall; a substantially cup-shaped, one-piece sleeve member threadably mounted to the pin means and engaging the central bore of the cutter; mounting means extending through the pin means of the arm for detachably securing the sleeve member to the pin means. Including means for preventing rotation between the sleeve member and the pin means wherein rotational contact between the cutter and the arm is prevented thereby eliminating frictional wear of the pin means to maintain the integrity of the pin means and arm; and assembly means for securing the cutter rotationally on the sleeve member and assembly means including ball bearing means disposed between the cutter and the sleeve member to counter thrust loads during drilling.
- Assignee:
- Drilex Systems, Inc., Houston, TX
- Patent Number(s):
- US 4865137
- Application Number:
- PPN: US 7186716A
- OSTI ID:
- 5323276
- Country of Publication:
- United States
- Language:
- English
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