Downhole drill bit drive motor assembly with an integral bilater

Details Downhole drill bit drive motor assembly with an integral bilater Downhole drill bit drive motor assembly with an integral bilater

1996-05-24

1998-03-10

Bagnell, David J.

Boring or penetrating the earth

With below-ground tool drive prime mover

Electric

175 40, 175320, E21B 404, E21B 4701

Patent

active

057250618

ABSTRACT:
A downhole drill bit drive motor assembly which provides a bilateral low resistance path from the upper end of a downhole drill bit drive motor to the lower end of such a motor by employing an insulated wire or group of several wires through the rotor of the motor. The drive motors provide a drive torque to a drill bit based on the flow of drilling fluids through the motor and includes an outer case, a motor stator, a motor rotor, a coupling to connect the motor rotor to an output shaft and a bearing to support both axial and radial loads. Fixed electrical contacts are provided at the upper end of the drill bit drive motor to provide connection to wireline for transmission of data from that point to the surface or other higher points. Rotary electrical contacts that provide continuous electrical contact as a rotary portion rotates with respect to a stationary portion are provided at the upper, lower, or both ends of the rotor. An electrical conductor is extended through the interior of the motor rotor, coupling and output shaft to the bit box on the end of the shaft that accommodates the drill bit.

REFERENCES:
patent: 3866678 (1975-02-01), Jeter
patent: 3879097 (1975-04-01), Oertle
patent: 3918537 (1975-11-01), Heilhecker
patent: 4051456 (1977-09-01), Heilhecker et al.
patent: 4143722 (1979-03-01), Driver
patent: 4215426 (1980-07-01), Klatt
patent: 5160925 (1992-11-01), Dailey et al.
patent: 5269383 (1993-12-01), Forrest
patent: 5456106 (1995-10-01), Harvey et al.

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