Downhole drilling system

Details Downhole drilling system Downhole drilling system

1979-02-05

1981-03-31

Leppink, James A.

Boring or penetrating the earth

With below-ground tool drive prime mover

With above-ground means

175104, 175 45, E21B 400

Patent

active

042588022

ABSTRACT:
A downhole drilling system utilizes a non-rotating kelly bushing for locking in the torque created in the drill string by the downhole drilling motor. The kelly bushing prevents rotational movement of the kelly secured to the drill string on which the downhole motor is attached. The kelly bushing includes a torque mechanism for enabling the kelly and the attached drill string to move in a forward direction into the hole being drilled while prohibiting any rotational movement. A guide mechanism is provided in the kelly bushing for enabling an electrical wire to be attached to either the downhole motor or a sensing mechanism located in the area of the downhole motor for feeding back to the surface appropriate electrical signals indicative of certain drilling operations.

REFERENCES:
patent: 945209 (1910-01-01), Avery
patent: 1666461 (1928-04-01), Lord
patent: 2094813 (1937-10-01), Penick et al.
patent: 2105091 (1938-01-01), Mackay
patent: 2312804 (1943-03-01), Dernck
patent: 2670929 (1954-03-01), Vock
patent: 3110350 (1963-11-01), Spiri
patent: 3838953 (1974-10-01), Peterson

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