Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1987-11-05
1989-11-07
Moon, Charlie T.
Metal working
Method of mechanical manufacture
Assembling or joining
29464, 295251, B23P 1102
Patent
active
048782858
ABSTRACT:
Precision makeup at high speed of the most used forms of pipe and casing for production wells is assured by a novel coupling system. A pipe collar is provided with an internal precision makeup ring whose length along the pipe axis assures precise positioning and engagement. When the nose of the pipe is engaged with metal-to-metal contact against a reference shoulder on the precision ring a side surface on the nose end of the pipe engages a center seal ring disposed in the side wall of the collar between the reference shoulder and the threaded portion. This seal constitutes an effective barrier against the leakage of high internal pressures into the thread engagement region. End seals are mounted in grooves in the end recess portions of the collar, outside the threaded engagement region, to provide seals against external pressure, which can also vent internal pressures that are in excess of a predetermined threshold. With this arrangement, a modified standard collar or a manufactured collar can be placed on a pipe or casing off the drill rig floor, with the axial length of the precision ring being selected to assure makeup tightness adjusted to particular axial stress conditions. Makeup on the rig floor requires only stabbing of the next pipe section into the collar and engagement until metal-to-metal contact is achieved and seals are concurrently established. Pipes and collars can readily be prescreened to eliminate a minor proportion of elements whose thread tapers vary more than is permissible for the given conditions. Fig
REFERENCES:
patent: 1590357 (1926-06-01), Feisthamel
patent: 1889868 (1932-12-01), Montgomery
patent: 1889869 (1932-12-01), Montgomery
patent: 2086667 (1937-07-01), Fletcher
patent: 2150221 (1939-03-01), Hinderliter
patent: 2320107 (1943-05-01), Speckert
patent: 2380690 (1945-07-01), Graham
patent: 3266821 (1966-08-01), Safford
patent: 3339945 (1967-09-01), McCrody, Jr. et al.
patent: 3850461 (1974-11-01), Fujioka et al.
patent: 4127927 (1978-12-01), Hauk et al.
LandOfFree
Method of assembling coupling to tubing or casting does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of assembling coupling to tubing or casting, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of assembling coupling to tubing or casting will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-76669