KIT FOR IMPLEMENTATION OF THREADED CONNECTION USED FOR DRILLING AND DEVELOPMENT OF HYDROCARBON WELLS AND THE THREADED CONNECTION PRODUCED WITH IT

摘要

1. A kit for making a threaded connection, comprising the first and second cylindrical elements with an axis (10) of rotation, each of which at one of its ends (1, 2) contains at least one first threaded part (3, 3a; 4, 4a ), made on the outer or inner peripheral surface of the element, depending on whether the threaded end is male or female, and made with the possibility of connection with the corresponding part by screwing, while these ends (1, 2) are completed by the end surface (7,8), characterized in that at least one of the threaded parts at least 10% of the length of the turns engaged with the specified threaded part in longitudinal section through the axis (10) has a corresponding profile containing a section of a continuous concave curve (C ) .2. A kit for making a threaded connection according to claim 1, characterized in that the portion of the continuous concave curve (C) is an arc of a circle or an ellipse, while the lowest turn height is reduced by 10-90%. 3. A kit for making a threaded connection according to claim 1, characterized in that each of the first and second cylindrical elements contains a second threaded part (3b; 4b) made on the outer or inner peripheral surface of the element, depending on whether the threaded end is male or covering, and made with the possibility of connection with its corresponding part by screwing. 4. A kit for making a threaded connection according to claim 3, characterized in that for each element the second threaded part (3b; 4b) is located in the continuation of the first threaded part (3a; 4a) .5. Comp�