Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Patent
1987-05-27
1988-09-27
Massie, Jerome W.
Wells
Conduit wall or specific conduit end structure
Downhole coupling or connector
285 55, 285371, E21B 1714, F16L 914
Patent
active
047734795
ABSTRACT:
A tubing string includes a series of tubing sections connected together by cuffs and extends from above the surface of the ground to an oil bearing formation in oil field service. To prevent corrosion of the string, each individual section of tubing has an internal bore which is tapered at the end and a corrosion resistant coating applied to the bore, including the taper. A corrosion resistant nipple is tapered on both ends to fit the taper within the bore of the ends of the tubing. The bore of the tubing, including the taper, has a corrosion resistant coating thereon. Therefore, the nipple which floats within the cuff retains the corrosive fluid being carried by the tubing within the bore, and the corrosive material does not contact the cuff, the threads, or any other part of the tubing.
REFERENCES:
patent: 2310944 (1943-02-01), Douglass
patent: 2349081 (1944-05-01), Douglass
patent: 3253841 (1966-05-01), Ahmad
patent: 3266821 (1966-08-01), Safford
patent: 3268240 (1966-08-01), Gerner
patent: 3286341 (1966-11-01), Miller
patent: 3338598 (1967-08-01), Kurtz
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patent: 4024913 (1977-05-01), Grable
patent: 4509776 (1985-04-01), Yoshida et al.
patent: 4568113 (1968-02-01), Axford et al.
Permian Enterprises, Inc., Advertising brochure, Midland, Tex., 79702, (Published Prior to 5-27-87).
FMC brochure, "Introducing the FMC Differential-Thread Pipe Connector," FMC Corp., Wellhead Equipment Div., Houston, Tex., 4 pages, 1982.
Coffee Wendell
Massie Jerome W.
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