Pipe joints or couplings – With assembly means or feature – Guide and support
Patent
1981-07-06
1983-10-18
Scanlan, Jr., Richard J.
Pipe joints or couplings
With assembly means or feature
Guide and support
285 27, 285334, F16L 5500, F16L 2500
Patent
active
044102046
ABSTRACT:
Proper alignment of threads when joints of casing are made up in hostile environments, such as on off-shore floating platforms subject to being buffeted by wave action, is provided the means of an improved box and pin connector. The pin has a substantially tapered threaded section whose small diameter end terminates in a cylindrical lower guide section and whose large diameter is adjacent a larger diameter cylindrical upper guide section. A stop above the upper guide section is provided by an upset. The box has a complementary section of internal oppositely tapered threads to mate with those on the pin as well as a smaller lower cylindrical receptacle to receive the lower guide section on the pin and a larger cylindrical receptacle to receive the upper guide section on the pin. The upper and lower guide sections on the pin and complementary receptacles in the box guide the threads into proper alignment. The threads are sufficiently tapered so that the guide sections and complementary receptacles are mutually, partially engaged prior to engagement of the threads. The threads have a back slant that prevents expansion of the box.
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Dril-Quip Inc.
Scanlan, Jr. Richard J.
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