Castering roller for a drill pipe guide bushing

Details Castering roller for a drill pipe guide bushing Castering roller for a drill pipe guide bushing

1976-04-30

1978-02-28

Bertsch, Richard A.

Cutlery

308237R, F16C 1900

Patent

active

040763382

ABSTRACT:
A drill pipe bushing for stabilizing the drill pipe at the mouth of the well during drilling includes a plurality of support arms supported in a circular array about the drill pipe. Rollers are attached to each support arm with the axis of the rollers normally parallel to the axis of the drill pipe. The support arms move the rollers into engagement with or away from the drill pipe. The rotational axis of the rollers become canted upon both rotation and translation of the drill pipe through the drill pipe bushing during the drilling operation.

REFERENCES:
patent: 3338642 (1967-08-01), Ortelli
patent: 3768595 (1973-10-01), Kelley, Jr.

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