Stabilizing and drilling apparatus and method
Patent
·
OSTI ID:6989217
This patent describes a drill collar assembly adapted to form part of a drill string used in drilling a borehole in the earth. It comprises: one or more elongated outer tubular members having connection means at both ends each thereof for interconnection one to another, a lower-most tubular member interconnectable with a drill bit and the lower-most tubular member including an interior weight transfer shoulder; and one or more free-standing weighting members disposed within the tubular members, a lower-most weighting member being adapted to rest upon the interior shoulder of the lower-most tubular member.
- Assignee:
- Amoco Corp., Chicago, IL
- Patent Number(s):
- A; US 4881605
- Application Number:
- PPN: US 7-244767--A
- OSTI ID:
- 6989217
- Country of Publication:
- United States
- Language:
- English
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