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Components for producing threaded connections for drilling and operating oil and gas wells and resulting threaded connections

A technology of threaded connectors and connectors, applied in threaded connections, drilling equipment, pipes/pipe joints/fittings, etc., can solve problems such as loss, lip bending contact, and long axial length of the groove

Active Publication Date: 2017-09-05
VALLOUREC OIL & GAS FRANCE SAS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, tests have shown that the axial length of grooves of this type is too long, which means that the radial deformation in the area near the groove often exceeds the elastic zone
Plasticization of this area often occurs, thus leading to bending of the lip and thus loss of contact at the sealing surface

Method used

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  • Components for producing threaded connections for drilling and operating oil and gas wells and resulting threaded connections
  • Components for producing threaded connections for drilling and operating oil and gas wells and resulting threaded connections
  • Components for producing threaded connections for drilling and operating oil and gas wells and resulting threaded connections

Examples

Experimental program
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Effect test

Embodiment Construction

[0051] figure 1 An assembly for producing a threaded connection is shown, comprising a first and a second tubular element with an axis of rotation 10 . One of the elements has an end called male end 1 comprising a first continuous threaded zone 3 produced on the outer circumferential surface of the element and following a first helix. The term "continuous threaded region" means that the threaded region has no breaks in the thread.

[0052] In a variant, it is possible to provide on the end 1 a second threaded zone following a second helix, taking care, of course, that the first and second threaded zones are synchronized to allow fitting.

[0053] The other element has an end called female end 2 comprising a first continuous threaded zone 4 produced on the inner circumferential surface of the element and following a first helix. The term "continuous thread region" means that the thread region 4 has no breaks in the thread.

[0054] In a variant, it is possible to provide on ...

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Abstract

The invention relates to an assembly for producing threaded connections, said assembly comprising a first and a second tubular element with an axis of rotation (10), each at their end (1, 2) respectively at least one first continuous thread region (3, 4) having a first helix followed on the outer or inner circumferential surface of the element depending on whether the threaded end is male or female, the tubular The elements fit together when assembled, said first threaded regions (3, 4) of said ends (1, 2) have a variable width dovetail thread profile, said ends (1, 2) respectively at Ending in terminal surfaces (7, 8), at least one of the ends (1, 2) has a lip (12) disposed between the threaded area and the terminal surface, said lip having a sealing surface (5), said sealing The surface is capable of cooperating with a sealing interference fit with a corresponding sealing surface (6) arranged facing the other end when the connector is in the assembled state, characterized in that said lip (12) is dug out with a groove (11 ), which adjoins the threaded area on the one hand and the sealing surface on the other hand, the length (GL) of the groove is calculated as follows (I):

Description

technical field [0001] The present invention relates to a threaded connection for drilling and / or operating oil and gas wells, and more precisely to optimizing the overall performance of the connection in terms of efficiency and sealing when the connection is operating in compression / tension. Background technique [0002] The term "threaded connection" means any assembly constructed of components that are generally tubular in shape, metallic, and capable of being constructed by purpose fitting to construct rods for drilling oil and gas wells, or for Maintenance standpipes (also known as workover risers), or standpipes used to operate such wells, such as standpipes, casing strings, or tubing strings used in operational wells, are connected together. [0003] Each tubular member includes an end portion having either a male threaded region or a female threaded region for fitting with a corresponding end portion of a similar member. When assembled, the parts fit into so-called ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/042F16L15/00F16L15/06
CPCE21B17/042F16L15/06F16L15/001
Inventor P·马丁B·勒格朗R·莫雷
Owner VALLOUREC OIL & GAS FRANCE SAS