Assembly for producing a threaded joint for the drilling and operation of hydrocarbon wells, and resulting threaded joint
A threaded joint and thread technology, applied in the direction of threaded connection, pipe/pipe joint/pipe fitting, earth-moving drilling, etc., can solve the problems of weak connection, narrow self-locking, complex change of thread size, etc.
Active Publication Date: 2014-06-04
VALLOUREC OIL & GAS FRANCE SAS
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Problems solved by technology
This solution also has the drawback of having complex variations in thread dimensions and thus a delicate operation of machining and control
In addition, the total clearance volume is greatest in the central section of the thread, so that, at the same time, different clearances are arranged at the thread, making the connection weaker, because the thread engages in this section, ie self-locks, becomes narrower and narrower
Method used
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Embodiment Construction
[0042] figure 1 A first embodiment of the invention is shown, a threaded joint in a tightened state, having an axis of rotation 10, the threaded joint having a first tubular part and a second tubular part, the first tubular part having the same axis of rotation 10 and matching With a male end 1, the second tubular part has the same axis of rotation 10 and is provided with a female end 2, which are screwed to each other. The two ends 1 and 2 each end with an end face 7, 8 oriented radially with respect to the axis 10 of the threaded joint, are respectively provided with threaded areas 3 and 4 which cooperate with each other so that the two ends The parts are assembled to each other by screwing. By threaded region is meant a section of the circumferential surface of the tubular component which has a continuous thread, ie an uninterrupted thread helix.
[0043] The threaded zones 3 and 4 are of the known so-called "self-locking" type (also known as the progressive variation of ...
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Abstract
The invention relates to an assembly for producing a threaded joint, comprising first and second tubular components having axis of rotation (10). One of the ends (1, 2) of each of the aforementioned components is provided with a first threaded zone (3, 3a; 4, 4a) formed on the outer or inner peripheral surface of the component, depending on whether the threaded end is male or female, and the threaded zones can be screwed to one another, said ends (1, 2) terminating at an end surface (7, 8). The assembly is characterized in that, according to a longitudinal cross-section extending through axis (10), at least one of the threaded zones allows a profile corresponding to a continuous concave curved portion (C) extending over at least 10% of the length of the engaged threads of the threaded zone.
Description
technical field [0001] The present invention relates to an assembly for carrying out threaded joints for drilling and exploiting hydrocarbon wells, said assembly having a first tubular part and a second tubular part, one of the tubular parts has a male threaded end, the tubular part The other has female threaded ends which are adapted for a self-locking screw fit. The invention also relates to a threaded joint, also called a coupling, obtained by screwing two tubular parts together. Background technique [0002] The so-called "hydrocarbon well drilling and development" components refer to such various components: basically in the shape of a tube, used to be assembled to another component of the same type or a different type, and after assembly, either constitute a component capable of drilling hydrocarbon wells The drill string, either constitutes a subsea riser for maintenance such as a "work over riser" or a thick casing string or production string used in the production ...
Claims
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IPC IPC(8): E21B17/042F16L15/00
CPCF16L15/06E21B17/042F16L15/004Y10T29/49995
Inventor J-G·贝斯
Owner VALLOUREC OIL & GAS FRANCE SAS