Pipe joints or couplings – With assembly means or feature – Particular tool-engaging means or with tool
Patent
1976-11-15
1978-06-06
Arola, Dave W.
Pipe joints or couplings
With assembly means or feature
Particular tool-engaging means or with tool
29452, 285334, F16L 5500
Patent
active
040932818
ABSTRACT:
A threaded connector for a pipe string, such as a production riser used in connection with sub-aqueous wells, in which the threaded connection between the pin member and box member of the connector is made up initially through an application of relatively low torque to the members, after which the connector has a straight line pretension force of a high tensile value applied to it through use of a suitable tool, the high pretension force being retained between the mating threads of the pin and box members by a preload reaction member threaded on the pin member and rotated into solid engagement with the box member while the pretension force is being applied, to lock the preload in the connector between the threads.
REFERENCES:
patent: 2671949 (1954-03-01), Welton
patent: 2866370 (1958-12-01), Biach
patent: 3466738 (1969-09-01), Mount
patent: 3749362 (1973-07-01), O'Connor
patent: 3995828 (1976-12-01), Orban
Arola Dave W.
Vetco Offshore Industries, Inc.
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