Importance

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Abstract

A threaded pipe connection as shown in FIGS. 1, 4, 5, 6 or 7, having a thread form such as depicted in FIGS. 8-11, that has: improved sealing; increased resistance to mechanical loads; easy assembly and low makeup torque. Both pin (31) and box (45) may be cut on non-upset pipe ends and result in nearly 100 percent joint efficiency. Tension flank (33) and compression flank (34) may be formed on pin (31) at high flank angles measured from the tubular axis so as to withstand high axial loads without forcing the pin inwardly and the box outwardly, which would tend to separate the mating threads, break the seal and jump threads. Low torque is assured by the complementary forms of pin threads (32) and box threads (42) which confine the thread dope (49) to remain in the root gaps (52) and (54) during assembly.

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First Claim