Pipe joints or couplings – With assembly means or feature
Patent
1990-07-03
1991-08-20
Arola, Dave W.
Pipe joints or couplings
With assembly means or feature
285 93, 285333, 29407, 33833, F16L 3500
Patent
active
050408275
ABSTRACT:
An improved method of making up a pressure sealing threaded connection for oilfield country tubular goods is provided. A threaded connection is of the non-shouldered type, and includes a pin member having an external tapered thread and a box member having an internal tapered thread. The actual pitch diameter of the pin thread and the box thread are measured and preferably recorded on the outer cylindrical surface of each respective member. An indicator is positioned on the pin member at a preselected location with respect to the pin face end surface. The pin member and box member are made up to form the threaded connection, while the position of the box face end surface is monitored. Make-up of the connection is terminated in response to this position and as a function of the recorded deviations on the pin and box members. In one embodiment, a hold down block is temporarily secured to the pin member, and a measuring probe supported by the hold down block is positioned such that its free end is directed toward the pin face end surface. A gage is used for determining a baseline reading position of the probe with respect to the pin face end surface. A computer is provided for comparing the position of the box face end surface with respect to the baseline reading position during make up of threaded connection. The method and apparatus of the present invention may be easily and reliably used to provide a highly reliable fluid-tight connection for non-shouldered threads of oilfield tubulars, including API threaded connections.
REFERENCES:
patent: 3468563 (1969-09-01), Duret
patent: 4127927 (1978-12-01), Hauk et al.
patent: 4908927 (1990-03-01), Goward
Arola Dave W.
Chun Heather
Tubular Technology, Inc.
LandOfFree
Method and apparatus for improved oilfield connections 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 and apparatus for improved oilfield connections, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for improved oilfield connections will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1003525