Balanced turbodrill
United States Patent 2591488
US Patent References:
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Inventors:
Lloyd, Yost
Publication Date:
04/01/1952
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Assignee:
SMITH CORP A O
CALIFORNIA RESEARCH CORP
Primary Class:
175/100
Other Classes:
175/107, 415/199.500, 415/196, 173/73, 415/903
International Classes:
E21B4/02; E21B4/00
US Patent References:
0850196
1482702Fluid-operated well-drilling apparatus
1727276Hydraulic rotary drill
1850403Mechanism for drilling angular channels
2348047Mud turbine and method of assembling the same