Double-taper slip-on drill string stabilizer

Patent · Tue Jul 15 00:00:00 EDT 1986

OSTI ID:5352964

Beasley, T R

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.

• Assignee: Dailey Petroleum Services Corp., Houston, TX
• Patent Number(s): US 4600063
• OSTI ID: 5352964
• Resource Relation: Patent File Date: Filed date 29 May 1984
• Country of Publication: United States
• Language: English

Related Subjects

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)