Imbalance compensated drill bit with hydrostatic bearing

Details Imbalance compensated drill bit with hydrostatic bearing Imbalance compensated drill bit with hydrostatic bearing

1990-10-03

1992-05-12

Bui, Thuy M.

Boring or penetrating the earth

Processes

Boring with specific fluid

175371, 175393, E21B 1060

Patent

active

051118920

ABSTRACT:
A subterranean drill bit is provided that comprises a drill bit body having a base portion disposed about a longitudinal bit axis, a gauge portion disposed about the bit axis and extending from the base portion, and a face portion disposed about the bit axis extending from the gauge portion. The drill bit further includes a plurality of cutting elements fixedly disposed on and projecting from the face portion and spaced from one another. A hydrostatic bearing is disposed in the gauge portion to create a hydrostatically lubricated low friction zone that facilitates rotation of the drill bit without gripping of rotation of the drill bit is thereby maintained substantially at one location on the drill bit, which avoids backwards whirling and provides stable bit rotation.

REFERENCES:
patent: 2807443 (1957-09-01), Wyman
patent: 4515227 (1985-05-01), Cerkoknik
patent: 4696354 (1987-09-01), King et al.

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