Boring or penetrating the earth – With storage means for bit lubricant carried by bit or shaft – With fluid pressure-actuated feed means
Patent
1994-12-01
1996-02-13
Dang, Hoang C.
Boring or penetrating the earth
With storage means for bit lubricant carried by bit or shaft
With fluid pressure-actuated feed means
E21B 1024
Patent
active
054905702
ABSTRACT:
An improved pressure compensator of the top-vented type for a roller cone drill bit comprises an elastomeric compensator diaphragm having an annular, peripheral, radially outwardly extending flange. An annular, axially acting compression spring is at least partially imbedded in the flange, elastomeric material of the flange at least partially underlying and overlying the spring for sealing engagement, respectively, with an axially facing shoulder in a recess in the bit body and a cap forming part of the assembly. The cap is disposed above the flange in the bit recess, and has a lower end surface for sealing abutment with the flange. The cap also has a vent communicating a zone above the diaphragm, in the recess, with the exterior of the bit. A retainer is positioned to hold the cap in the recess, thereby also retaining the diaphragm in the recess, and compressing the spring sufficiently to cause sealing engagement on both sides of the flange, but not beyond the elastic limit of the spring.
REFERENCES:
patent: 3942596 (1976-03-01), Millsapps, Jr.
patent: 4161223 (1979-07-01), Oelke
patent: 4199856 (1980-04-01), Farrow et al.
patent: 4386667 (1983-06-01), Millsappas, Jr.
patent: 4388984 (1983-06-01), Oelke
patent: 4552228 (1985-11-01), Evans et al.
patent: 4865136 (1989-09-01), White
patent: 4942930 (1990-07-01), Millsapps, Jr.
patent: 5027911 (1991-07-01), Dysart
patent: 5072795 (1991-12-01), Delgado et al.
Catalog excerpts from Reed Tool Company, 2 pages.
Catalog excerpts from Walker-McDonald, 3 pages.
Briscoe Tool Company
Dang Hoang C.
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