Means for retaining roller cutters on rotary drill bit

Details Means for retaining roller cutters on rotary drill bit Means for retaining roller cutters on rotary drill bit

1989-02-21

1990-03-27

Massie, Jerome W.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175369, 175371, 384 95, 384 96, E21B 1022

Patent

active

049112554

ABSTRACT:
A roller cutter (28) of a drill bit (10) is retained on a journal (24) for rotation by a retainer ring (82) having external screw threads (88) which are threaded onto mating screw threads (108) on the roller cutter (28) for rotation therewith. The retainer ring (82) is mounted within a semicircular groove (68) on the journal (24) and has an inner periphery formed of a smooth arcuate surface contacting the annular groove at a position spaced at least 10.degree. from the entrance opening of the groove thereby to reduce bending stresses exerted against the root (74) of the groove (68).

REFERENCES:
patent: 2490151 (1949-12-01), Noble et al.
patent: 2513634 (1950-07-01), Francis
patent: 3971600 (1976-07-01), Murdoch et al.
patent: 4236764 (1980-12-01), Galle
patent: 4533003 (1985-08-01), Bailey et al.
patent: 4538928 (1985-09-01), Muma

Affiliated with

Also associated with

Rating

Means for retaining roller cutters on rotary drill bit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Means for retaining roller cutters on rotary drill bit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Means for retaining roller cutters on rotary drill bit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1644896