Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type
Patent
1985-12-27
1987-07-14
Leppink, James A.
Boring or penetrating the earth
With below-ground tool drive prime mover
Fluid rotary type
418 48, 418182, 464 19, 464 97, 464160, E21B 402, F03C 200, F16D 304
Patent
active
046796380
ABSTRACT:
A downhole motor has a rotor and a stator, of the progressive cavity type, inside a housing. A bearing shaft is mounted within the housing, with a bearing between the housing and the bearing shaft, and the bearing shaft is rotatable about the longitudinal axis of the bearing shaft and the housing. A flexible rod, with a connection on each end, extends between the rotor and the bearing shaft, for translating the rotation and gyration of the rotor to the true rotation of the bearing shaft. A cylindrical overload sub is located concentrically around the rod. A plurality of splines and slots on the connections engage a plurality of splines and slots on the sub to allow the connections to rotate axially a limited amount in relation to one another. Teeth may be used instead of splines and slots.
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Dang Hoang C.
Hughes Tool Company
Kelly H. Dennis
Leppink James A.
LandOfFree
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