Automatic depth compensating system for drill bit lubrication

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

E21B 1024

Patent

active

043288731

ABSTRACT:
An automatic depth compensating system is provided for controlling the pressure in a volume such as the interior of a rotary drill bit in response to pressure changes in the environment adjacent to the volume. The system comprises at least one pressure compensating device positioned between the volume and the environment for changing the pressure in the volume in response to pressure changes in the environment. The system further includes a pressure surge compensating device which is positioned between the volume and the environment for compensating for positive and negative pressure surges when the pressure in the volume changes relative to the pressure in the environment. The pressure compensating devices each comprises differential piston devices having a spring for biasing the differential piston and the pressure surge compensating device comprises a cylinder, a piston positioned in the cylinder and forming a chamber therein and first and second check valves for opening in response to predetermined pressure differentials between the environment and the interior of the volume.

REFERENCES:
patent: 3244459 (1966-04-01), Ortloff
patent: 3303898 (1967-02-01), Bercaru
patent: 3844364 (1974-10-01), Crow
patent: 3866695 (1975-02-01), Jackson
patent: 4154312 (1979-05-01), Barnetche
patent: 4254838 (1981-03-01), Barnetche

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

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

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

Rate now

     

Profile ID: LFUS-PAI-O-752055

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