Drill tool

Details Drill tool Drill tool

1981-02-25

1984-04-03

Purser, Ernest R.

Boring or penetrating the earth

Cutter element laterally shiftable below ground

Pivoted about substantially longitudinal axis

175389, 175398, 175410, 175415, E21B 1030, E21B 1056

Patent

active

044402449

ABSTRACT:
A drill tool for rotary and/or percussion drilling with drill rod means (14) within casing tube means (15) comprises a centric cutting bit (11) and an eccentric reamer cutter (12), both provided with hard metal inserts. For purposes of obtaining a life of the drill tool as long as possible the first frontal insert (23) on the reamer cutter (12) is positioned in front of the first peripheral insert (18) when seen in the rotational direction (D) during drilling, and the centric cutting bit (11) provided with more inserts on the half (38) of its front surface opposed to the reamer cutter (12) during drilling than on the other half (39).

REFERENCES:
patent: 3289776 (1966-12-01), Cleary
patent: 3753470 (1973-08-01), Lagerstrom et al.
patent: 3848683 (1974-11-01), Persson
patent: 4014395 (1977-03-01), Pearson
patent: 4202421 (1980-05-01), Pinck

Affiliated with

Also associated with

Rating

Drill tool does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-663068