Apparatus for anchoring the pilot member in a pilot bore
United States Patent 3386520
US Patent References:
Underreamer
- - 1471808

Drilling structure and circulating pump
- - 1983287

Hydrostatic pressure set well packer
- - 3180419


Inventors:
Clifton, Lawrence James
Hauth, Hamilton William
Publication Date:
06/04/1968
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Assignee:
ALKIRK INC
Primary Class:
175/230
Other Classes:
175/381, 299/31, 173/33, 166/120
International Classes:
E21D9/11; E21D9/10
Foreign References:
SU124898A