MEANS TO EFFECT THE TIGHTENING OF A THREADED TUBE JOINT WITH AN ABUTMENT

摘要

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 a predetermined value of the surface of the female element (2) along said line at the level of the gauge.