Patent ID: 7874054

Claim:
A method for producing a tubular component provided at each of its two ends with a threaded element including a male or female thread and a makeup stop abutment that can form part of a string of tubular components in which two consecutive components are mutually assembled by connecting the male thread of one threaded element of one component into the female thread of one threaded element of another component, the corresponding stop abutments coming into mutual bearing contact, the method comprising: a) mounting the component in a chuck of a lathe; b) machining a first threaded element at one end of the component using the lathe; c) screwing a first orientation gauge onto the first threaded element, the gauge including a thread that matches that of the first threaded element and a makeup stop abutment and having a mark on its external periphery, to bring the stop abutments of the threaded element and the orientation gauge into mutual bearing contact; d) drawing an orientation mark axially aligned with the mark on the orientation gauge on the external periphery of the component; e) revolving the component in the lathe chuck during which the component is so disposed that its orientation mark is located in the same angular position with respect to the chuck as in the drawing (d); f) machining a second threaded element at the other end of the component by the lathe, using a machining tool that is displaced with respect to the frame of the lathe under the control of a program, from a given position during which the starting position of the tool is defined after at least one preliminary test; g) screwing a second orientation gauge including a thread matching that of the second threaded element and a makeup stop abutment and having a mark on its external periphery onto the second threaded element to bring the stop abutments of the threaded element and the orientation gauge into mutual bearing contact, the orientation gauge used during the screwing g) being the first orientation gauge if the threads of the first and second threaded elements are both male or both female, or being of a matching type to the first orientation gauge and having its mark axially aligned with the mark of the first orientation gauge when the first and second orientation gauges are screwed into abutment if one of the threaded elements is male and the other is female; and h) comparing an angular offset between the marks on the component and the orientation gauge with a pre-defined set value Q and a new starting position of the machining tool is defined as being axially offset with respect to the initial position by a quantity determined as a function of the direction and amplitude of any existing deviation.