Drilling bit with improved trailing edge vent

Details Drilling bit with improved trailing edge vent Drilling bit with improved trailing edge vent

1988-06-28

1989-03-21

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175339, E21B 1018, E21B 1022

Patent

active

048135020

ABSTRACT:
A rotating drill bit (10) includes a leg (12) and journal arm (14) on which is mounted a cone-shaped cutter (16). The cutter (14) rotates on the journal arm (14) by means of an anti-friction bearing including rollers (20) and ball bearings (26). Air is pumped through the journal arm (14) through conduits (30, 32 and 34). Air flows through the passages between rollers (20) and is collected in a cavity (52). The cavity (52) is vented to the borehole through a slot (54) in the trailing edge of the journal arm (14). A very narrow clearance in the order of a few thousandths of an inch is provided for rotational movement between the cone mouth shoulder (36) and last machined surface (40). Cone mouth shoulder (36) completely covers the last machined surface (40) around the entire periphery of the journal arm (14) except for the approximately 45.degree. slot (54) in the trailing edge of the journal arm (14).

REFERENCES:
patent: 3534823 (1970-10-01), Frederick
patent: 3921735 (1975-11-01), Dysart
patent: 4193463 (1980-03-01), Evans
patent: 4375242 (1983-03-01), Galle
patent: 4386668 (1983-06-01), Parish
patent: 4421184 (1983-12-01), Mullins
patent: 4515228 (1985-05-01), Dolezal et al.
patent: 4516640 (1985-05-01), Karlsson
patent: 4688651 (1987-08-01), Dysart

Affiliated with

Also associated with

Rating

Drilling bit with improved trailing edge vent 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 bit with improved trailing edge vent, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drilling bit with improved trailing edge vent will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-471407