Pressure compensator for drill bit lubrication system

Boring or penetrating the earth – With storage means for bit lubricant carried by bit or shaft – With fluid pressure-actuated feed means

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

175371, 384 93, E21B 1022

Patent

active

050727958

ABSTRACT:
A fluid pressure compensator for a lubrication system in a rotary drill bit includes a diaphragm (44) with an enlarged thickness central portion (62) having a generally hemispherically shaped deformation (72) at its center to form a minimal thickness thereat progressively increasing to the enlarged thickness. A self sealing puncture (74) is provided at the center of the diaphragm (44) to relieve excess pressure differentials in the lubrication system internally of the drill bit and excess pressure differentials in the drilling fluid externally of the drill bit. The diaphragm (44) has an enlarged protuberance (64) about its outer periphery which is secured in sealing relation within a groove formed by sealing surfaces (66, 68, 70) on a leg (10) of the rotary bit and associated securing cap (46). A protective cup (42) supports the diaphragm (44) in an extended position and has dimples (58) for supporting the diaphragm (46) on the bottom (40) of the lubricant reservoir (49).

REFERENCES:
patent: 3476195 (1969-11-01), Galle
patent: 3847234 (1974-11-01), Schumacher, Jr. et al.
patent: 3942596 (1976-03-01), Millsapps, Jr.
patent: 4055225 (1977-10-01), Millsapps
patent: 4161223 (1979-07-01), Oelke
patent: 4597455 (1986-09-01), Walters et al.
patent: 4727942 (1988-03-01), Galle et al.
patent: 4887675 (1989-12-01), Shotwell

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Pressure compensator for drill bit lubrication system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pressure compensator for drill bit lubrication system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure compensator for drill bit lubrication system will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-831223

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.