Downhole drilling motor

Details Downhole drilling motor Downhole drilling motor

1988-02-22

1989-07-04

Novosad, Stephen J.

Boring or penetrating the earth

With below-ground tool drive prime mover

Fluid rotary type

175 61, 175321, 267125, 267137, 464 18, E21B 402

Patent

active

048441805

ABSTRACT:
A downhole drilling motor is disclosed in which an output shaft is allowed to translate in axial direction relative to the motor housing over a predetermined stroke. Fluid pressure of a drilling fluid pumped to a rotary drill bit driven by the motor may be used during operation of the motor to exert a predetermined axial force to the output shaft so as to control the axial force exerted to the bit during drilling.

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"`Hi-Temp` Steel Spring Shock Sub.RTM. Vibration Dampener," from the 1976-77 Composite Catalog.RTM. of Oil Field Equipment & Services, pp. 2158-2162, published by World Oil.

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