Mechanical lock to prevent seal ring rotation

Details Mechanical lock to prevent seal ring rotation Mechanical lock to prevent seal ring rotation

1992-12-14

1994-03-22

Britts, Ramon S.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

277 92, 384 94, E21B 1022

Patent

active

052955494

ABSTRACT:
An earth boring bit of the type having at least one rotatable cutter on a bearing shaft, a hydrostatic pressure compensator to balance the pressure of the lubricant with the pressure of the drilling fluid in the borehole, a metal face seal assembly of the type that enables movement of the seal to compensate for dynamic pressure changes in the lubricant as the cone moves on the bearing shaft, and a protuberance extending from a metal ring of the seal assembly into an aperture in the body of the bit adjacent the shaft with both axial and radial clearances sufficient to enable compensating movements of the seal assembly.

REFERENCES:
patent: 3193028 (1965-07-01), Radzimovsky
patent: 3251634 (1966-05-01), Dareing
patent: 4179003 (1979-12-01), Cooper et al.
patent: 4466622 (1984-08-01), Deane et al.
patent: 4516641 (1985-05-01), Burr
patent: 4623028 (1986-11-01), Murdoch et al.
patent: 4666001 (1987-05-01), Burr
patent: 4753303 (1988-06-01), Burr
patent: 4903786 (1990-02-01), Welsh
patent: 5080183 (1992-01-01), Schumacher et al.

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