Seals for use in oil and gas well production tubing

Patent · Tue Apr 07 04:00:00 EDT 1987

OSTI ID:6825391

Albrecht, N M; Blanchard, R J

This patent describes seals for use in couplings, and joints, as used in the formation of production tubing for use in sour gas containing hydrogen sulfide environments. A tubular member containing an inwardly tapered threaded section is provided with a seal inclusive of an annular groove and ring-shaped extrudable generally non-resilient sealing member seated in the groove. The ring-member is extrudable into and confinable within the groove when the couplings, or joints, are made up by threadably connecting therewith a threaded end of pipe, and make-up of the couplings, or joints, produces hoop stresses in the outer walls of the couplings, or joints, adjacent the non-resilient sealing member against which force is applied during make-up The improvement described here is wherein the bottom face of the annular groove component of the seal is contoured to provide a radius ranging from about 1/8 inch to about 1/4 inch, the annular groove is provided with side walls, and the side walls of the annular groove are straight and are adjoined to angular sides ranging from about 20/sup 0/ to about 45/sup 0/, such that the ring-shaped extrudable generally resilient sealing member is extruded into the contour within the bottom face of the annular groove component.

• Assignee: Tube-Alloy Corp., Houma, PA
• Patent Number(s): US 4655485
• OSTI ID: 6825391
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
CHALCOGENIDES
CONDUCTOR DEVICES
CONNECTORS
COUPLINGS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
ELECTRICAL EQUIPMENT
EQUIPMENT
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INCIDENCE ANGLE
JOINTS
NATURAL GAS WELLS
OIL WELLS
PIPES
SEALS
STRESSES
SULFIDES
SULFUR COMPOUNDS
THREADED JOINTS
WELL DRILLING
WELLS