Drilling apparatus and cutter therefor

Details Drilling apparatus and cutter therefor Drilling apparatus and cutter therefor

1984-03-08

1985-08-06

Novosad, Stephen J.

Boring or penetrating the earth

Cutter element laterally shiftable below ground

Cutter element shifted by fluid pressure

175371, 384 96, E21B 1032, E21B 1022

Patent

active

045330034

ABSTRACT:
An underreamer, hole opener, or expansible rotary drill bit including a body having a bore therethrough, an arm mounted at its upper end to the body, a conical cutter mounted for rotation on the lower end of each arm, a cup-shape thrust bearing between the cutter and the arm, a bolt through the arm to secure the cutter on the arm and means including a ball and groove between the bolt and the cutter to lock the bolt to the cutter. In the underreamer form of the present invention, the arms are pivotally mounted in slots in the body and means is provided for moving their arms to their cutting position with their lower ends positioned radially outward from the body.

REFERENCES:
patent: 2061141 (1936-11-01), Crum
patent: 2210077 (1940-08-01), Hanly
patent: 2787502 (1957-04-01), Huckshold
patent: 3171503 (1965-03-01), Shirley
patent: 4156470 (1979-05-01), Bodine et al.

Affiliated with

Also associated with

Rating

Drilling apparatus and cutter therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-508023