| 摘要 |
Pipe joint for pumping endogenous fluids and for well casings, with tapered thread, complete with a male (1) and a female element (2), characterized by a specific combination of surfaces ensuring a hermetic metal seal by the interaction between two surfaces, one on the male element and one on the female, having a tapered shape the taper being between 6.25 and 9.25%, the surface (4) of the male element which comes into contact with the corresponding female element (9) having a lengthwise extension of between 0.5 and 2.5 mm. Said seal is advantageously combined with two seat surfaces (5, 10), one on the male element and the other on the female, both being tapered, the angle made by the generatrix with a plane perpendicular to the joint axis being between 5 and 10 DEG , said surfaces coming into contact only after interaction and energization of the threads and the seal surfaces. |
