Pipe joints or couplings – With lubrication
Patent
1990-02-16
1991-11-12
Arola, Dave W.
Pipe joints or couplings
With lubrication
285334, F16L 2500
Patent
active
050642243
ABSTRACT:
An oil field tubular connection is provided for joining metallic tubulars at a well site. At least one end of each tubular is provided with a frustoconical external sealing surface for metal-to-metal sealing engagement with a corresponding surface of an adjoining tubular. A plurality of antigalling grooves provided along the external sealing surface each project radially inward thereof and circumferentially encircle the threaded end of the tubular member and seal the groove from fluid communication with the interior of the tubular member. The antigalling grooves are particularly well suited for use with a low angular taper sealing surface of less than approximately 7.degree., and reduce galling between the metal sealing surfaces during makeup of the connection. Each tubular connection may also include an energizing groove spaced axially between the exterior sealing surface and the threads on the tubular member. The energizing groove receives excess thread lubricant, and has a uniform radial depth circumferentially about the tubular member for reducing the cross-sectional thickness of the tubular member, thereby allowing the exterior sealing surface to move radially outward in response to increased tubing pressure and allowing more flexibility for increased interference between the sealing surfaces during makeup of the connection.
REFERENCES:
patent: 3047316 (1962-07-01), Wehring
patent: 3054628 (1962-09-01), Hardy et al.
patent: 3489437 (1970-01-01), Duret
patent: 3508771 (1970-04-01), Duret
patent: 3822902 (1975-06-01), Maurer et al.
patent: 3850461 (1975-02-01), Fujioka et al.
patent: 3856337 (1975-03-01), Ehm et al.
patent: 3870351 (1975-04-01), Matsuki
patent: 3880451 (1975-05-01), Kinzbach
patent: 3989284 (1976-10-01), Blose
patent: 4192533 (1980-03-01), Blose
patent: 4433862 (1984-02-01), Raulins
patent: 4548431 (1985-10-01), Hall
patent: 4601491 (1986-07-01), Bell
patent: 4750761 (1988-06-01), Watts
patent: 4770444 (1988-09-01), Hauk
World Oil's 1986 Tubing Tables, Jan. 1986, pp. 41 and 50, Gulf Publishing Co.
NL Atlas Bradford General Catalog, 45 pages, Copyright 1987, "Bearing and Lubricants", Machine Design, 10/13/88, pp. 127-189.
"Super Premium (SPC) and Deep Sour Gas (DSGC) Threaded Connection Development", H. J. Dunham and Others, 1982.
Internal Patent Disclosure NL-5481, "Optimized Threaded Connections for Deeper and/or Higher Pressure Sour Gas Wells", Dec., 1982, H. J. Dunham.
Arola Dave W.
Baroid Technology Inc.
LandOfFree
Oil field tubular connection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oil field tubular connection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oil field tubular connection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1009317