DEVICE AND METHOD FOR FASTENING SCREW-THREADED PIPE JOINTS WITH LOCATING MEANS

本发明是关于旋合螺纹钢管接头的方法，该接头主要用在石油工业上，螺纹管接头包括一个带外螺纹（３）的外螺纹件（１）和一个带有内螺纹（４）的内螺纹件（２）以及至少一对位于内螺纹件（２）内的螺纹限位止挡（５、６），在旋合管接头之前，在内螺纹件外表面距限位止挡平面一段距离上，并与螺纹成方向的上述限位止挡的那一边安装一应力计，用以瞬间监测内螺纹件外表面沿母线方向的纵向变形，旋合螺纹管接头，直至应力计上的指示数与一个在应力计处的内螺纹件外表面沿母线方向的扩展预定值相对应时为止。 A process is provided for executing the screwing of a threaded joint for steel tubes, designed especially for the petroleum industry, of the type having a male element (1) with external threading (3) and female element (2) with internal threading (4), as well as at least one pair of screwing limit stops (5, 6). A strain gauge which allows the instantaneous determination of longitudinal deformations of the external surface along a line of the female element (2) is applied to the external surface of the female element (2) at a certain distance from the plane of the screwing limit stop and on the side of said plane which is opposite to the threads (3, 4), and the screwing down of the joint is executed until the indications provided by the strain gauge corresponds to an extension of