Title:
HIGH TORQUE, LOW SPEED MUD MOTOR FOR USE IN DRILLING OIL AND GAS WELLS
Document Type and Number:
WIPO Patent Application WO1999041483
Kind Code:
A9
Abstract:
A mud motor (100) for use in oil and gas well drilling includes a reciprocating valve and piston arrangement that generates power using drilling fluid media (e.g., drilling mud) pumped through an inlet port (118) to form a differential across a piston seat (46). The differential pressure causes the valve and piston assembly to move down in an elongated body (111). Rollers (138, 142) then force telescoping, reciprocating fingers (56, 57) to rotate while absorbing the reciprocating up and down action of the valve and piston assembly. This clockwise rotation causes a transmission that includes a clutch shaft (134) and sprags (146) to engage a clutch housing (135) causing the drill bit (17) to turn. Thrust bearings (156) allow weight to be applied to the tool (100) to optimize drilling action. The apparatus can be used in well drilling or in the removal of obstructions (14) such as bridge plugs, metal and rubber from the well bore.
Inventors:
HIPP JAMES E (US)
Application Number:
PCT/US1999/003156
Publication Date:
October 14, 1999
Filing Date:
February 12, 1999
Export Citation:
Assignee:
BAKER HUGHES INC (US)
HIPP JAMES E (US)
HIPP JAMES E (US)
International Classes:
E21B4/02; (IPC1-7): E21B4/14
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