Seal assembly for rotary drill bits

Details Seal assembly for rotary drill bits Seal assembly for rotary drill bits

1988-04-25

1989-06-13

Massie, IV, Jerome W.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

277 84, 277 92, 277 93SD, E21B 1022

Patent

active

048383651

ABSTRACT:
A seal assembly for a roller cutter bit mounted in an annular cavity between a roller cutter and a journal. A mechanical spring on the roller cutter urges in an axial direction sealing faces on respective rigid seals into sealing engagement with each other against the bias of an opposed to elastomeric seal. Even upon permanent or compression set of elastomeric seal, the sealing force is maintained by the mechanical seal against the sealing faces on the rigid annular rings.

REFERENCES:
patent: 3502343 (1970-03-01), Pustelnik
patent: 3572452 (1971-03-01), Winberg
patent: 3588127 (1971-06-01), Coleman
patent: 3645591 (1972-02-01), Winberg
patent: 4172502 (1979-10-01), van Nederveen
patent: 4176848 (1979-12-01), Lafuze
patent: 4199156 (1980-04-01), Oldham et al.
patent: 4359111 (1982-11-01), Gonzalez
patent: 4466622 (1984-08-01), Deane et al.
patent: 4516641 (1985-05-01), Burr
patent: 4605234 (1986-08-01), Metcalf
patent: 4613005 (1986-09-01), Olsson
patent: 4629338 (1986-12-01), Ippolito
patent: 4671368 (1987-06-01), Burr
Sandia Laboratories, Sand 80-7101, Unlimited Release, UC-66c, Jul. 1980, FIG. 9.

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