Rotary drilling device

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

175343, 175353, 175365, 175376, E21B 1008

Patent

active

049363980

ABSTRACT:
A drill bit for earth boring purposes includes a drill bit body which is rotatable about a drilling axis, a single cutting member mounted rotatably on the body and a counter-reaction member also mounted on the body. The counter-reaction member extends partially downwardly from the body and includes first and second outwardly exposed surfaces. The first surface has a greater surface area than the second surface and is at least partially formed with a circumferentially disposed curvature and a longitudinally disposed curvature with respect to the drilling axis so that it can closely conform to and contact the curvature of the bottom of the hole formed by the drill bit. The first surface of the counter-reaction member acts as a friction pad to counteract the torque effects of rotating the drill bit about the drilling axis and the cutting member engaging in the ground. The second surface is situated substantially circumferentially adjacent to the first surface and is inwardly angularly disposed with respect to the first surface and forms an obtuse angle with the first surface. The second surface has a plurality of teeth mounted on it for smoothing the bottom of the hole formed by the drill bit by removing ridges formed in the bottom of the hole by the teeth of the cutting member as the drill bit rotates.

REFERENCES:
patent: 1852843 (1932-04-01), Greve
patent: 1879127 (1932-09-01), Schlumpf
patent: 3424258 (1969-01-01), Nakayama
patent: 4285409 (1981-08-01), Allen
patent: 4444281 (1984-04-01), Schumacher, Jr. et al.
patent: 4549614 (1985-10-01), Kaalstad et al.
patent: 4790397 (1988-12-01), Kaalstad et al.
patent: 4832143 (1989-05-01), Kaalstad et al.

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

Rotary drilling device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rotary drilling device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary drilling device will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1119781

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