Non-rotating stabilizer for drill string

Details Non-rotating stabilizer for drill string Non-rotating stabilizer for drill string

1979-02-15

1981-10-06

Leppink, James A.

Wells

Submerged well

Connection or disconnection of submerged members remotely...

175325, 308 4A, 3081341, F16C 126, F21B 1710

Patent

active

042930391

ABSTRACT:
A stabilizer for attachment to drill string in large diameter earth boring or shaft drilling to center the drill string and maintain alignment of the drill bit. The stabilizer has an inner hub that is rigidly secured to the drill string above the bit. A rubber tube inside the inner hub is compressed to lock the inner hub to the drill string. An outer hub encircles the inner hub. A bearing is mounted between the inner hub and outer hub to allow rotation with respect to each other. The bearing includes a frusto-conical ring in contact with individual pads that are exposed to the drilling fluid. A number of arms extend radially outward from the outer hub to centralize the drill string. The arms are telescopingly received in the outer hub and are pinned together by tie bars at their outer ends to allow them to be quickly removed.

REFERENCES:
patent: 2751203 (1956-06-01), Compton
patent: 3231029 (1966-01-01), Winberg
patent: 4083612 (1978-04-01), Olson
patent: 4098544 (1976-07-01), Still et al.
patent: 4133397 (1979-06-01), Tschirky
patent: 4227585 (1980-10-01), Glass, Jr.

Affiliated with

Also associated with

Rating

Non-rotating stabilizer for drill string does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Non-rotating stabilizer for drill string, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-rotating stabilizer for drill string will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1202521