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Title: Double-taper slip-on drill string stabilizer

Abstract

A stabilizer is described for use on a drill collar which comprises: (a) a cylindrical body with: (i) a longitudinal bore, (ii) internally threaded end portions, (iii) a double-tapered inner surface extending between the end portion and a relatively thicker central portion; (b) a hollow end cap at each end of the body threaded externally to mate with the corresponding internally threaded portion of the body and having a circumferential groove in the internal surface thereof near the outboard end thereof; (c) double-tapered slip segments within each end of the body adapted to mate and wedge against the double-tapered inner surface at the end of the body upon entry of one of the end caps into the end of the body; the slip segments being distributed around the body, the slip segment having: (i) a longitudinal slot, and (ii) a circumferential recess in the exterior surface thereof near the outboard end of the slip segment facing the end cap, the circumferential recess defining a retaining lip on the external surface of the slip segment which fits within the circumferential groove in the end cap; (d) an expansible member configured to engage the inner surfaces of the slip segments as tomore » urge the lips of the slip segments radially into the circumferential recess of the end cap; (e) a compressible renitent member positioned within the slip segment recess between the threaded terminus of the end cap and the slip segment so as to be compressed upon entry of the end cap into the body; and (f) a locking device interengaging the slip segment longitudinal slot and the body to resist rotational movement therebetween.« less

Inventors:
Publication Date:
OSTI Identifier:
5352964
Patent Number(s):
US 4600063
Assignee:
Dailey Petroleum Services Corp., Houston, TX
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 29 May 1984
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 03 NATURAL GAS; 42 ENGINEERING; DRILL PIPES; STABILIZATION; WELL DRILLING; COMPRESSIBILITY; FASTENERS; NATURAL GAS WELLS; OIL WELLS; ROTATION; SUPPORTS; SURFACES; THICKNESS; THREADED JOINTS; DIMENSIONS; DRILLING; DRILLING EQUIPMENT; EQUIPMENT; JOINTS; MECHANICAL PROPERTIES; MECHANICAL STRUCTURES; MOTION; PIPES; WELLS; 020300* - Petroleum- Drilling & Production; 030300 - Natural Gas- Drilling, Production, & Processing; 420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)

Citation Formats

Beasley, T R. Double-taper slip-on drill string stabilizer. United States: N. p., 1986. Web.
Beasley, T R. Double-taper slip-on drill string stabilizer. United States.
Beasley, T R. Tue . "Double-taper slip-on drill string stabilizer". United States.
@article{osti_5352964,
title = {Double-taper slip-on drill string stabilizer},
author = {Beasley, T R},
abstractNote = {A stabilizer is described for use on a drill collar which comprises: (a) a cylindrical body with: (i) a longitudinal bore, (ii) internally threaded end portions, (iii) a double-tapered inner surface extending between the end portion and a relatively thicker central portion; (b) a hollow end cap at each end of the body threaded externally to mate with the corresponding internally threaded portion of the body and having a circumferential groove in the internal surface thereof near the outboard end thereof; (c) double-tapered slip segments within each end of the body adapted to mate and wedge against the double-tapered inner surface at the end of the body upon entry of one of the end caps into the end of the body; the slip segments being distributed around the body, the slip segment having: (i) a longitudinal slot, and (ii) a circumferential recess in the exterior surface thereof near the outboard end of the slip segment facing the end cap, the circumferential recess defining a retaining lip on the external surface of the slip segment which fits within the circumferential groove in the end cap; (d) an expansible member configured to engage the inner surfaces of the slip segments as to urge the lips of the slip segments radially into the circumferential recess of the end cap; (e) a compressible renitent member positioned within the slip segment recess between the threaded terminus of the end cap and the slip segment so as to be compressed upon entry of the end cap into the body; and (f) a locking device interengaging the slip segment longitudinal slot and the body to resist rotational movement therebetween.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {7}
}