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Torque shoulder of a premium connection

a technology of torque shoulder and premium connection, which is applied in the direction of screw threaded joints, drilling pipes, mechanical equipment, etc., can solve the problems of large standoff and compromise of seals, and achieve the effect of reducing or eliminating pin movement and being easy to manufactur

Inactive Publication Date: 2018-09-06
ARCELORMITTAL TUBULAR PROD LUXEMBOURG SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a connection that prevents a pin from moving in a radial direction. This is done by using torque shoulders that secure or trap the pin in a box. The connection is easy to manufacture. Its technical effect is to reduce or eliminate movement of the pin, making it more stable and reliable.

Problems solved by technology

A large standoff may be problematic because the pin seal surface and box seal surface are in contact while the standoff is being eliminated.
If a large amount of turning is needed to reduce a large standoff, galling of the seal surfaces occurs, thereby compromising the seals.

Method used

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  • Torque shoulder of a premium connection
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  • Torque shoulder of a premium connection

Examples

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Embodiment Construction

[0030]FIG. 1A shows a traditional torque shoulder and metal-to-metal seal combination as known in the art. Box 1520 includes box seal surface 1524 and box torque shoulder 1526. Pin 1420 includes pin seal surface 1424, nose 1428 and pin torque shoulder 1426. As shown in FIG. 1, pin seal surface 1424 is located at an end of pin 1420. The nose 1428 of pin 1420 is wedged between pin seal surface 1424 and pin torque shoulder 1426 when the connection is formed. The connection of pin 1420 and box 1520 defines a longitudinal axis of the pipe and connector (not shown). An axis X is perpendicular to the longitudinal axis and runs through the end of the torque shoulders 1426, 1526 at pin nose 1428. Pin torque shoulder 1426 and box torque shoulder 1526 each include a single shoulder surface that is angled with respect to perpendicular axis X. An interior angle A formed between torque shoulders 1426, 1526 and perpendicular axis X may be, for example, approximately −15°, that is, 15° in the clock...

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Abstract

A threaded tubular connection includes a pin having external threads, a pin seal surface, and a pin torque shoulder at a free end and a box for receiving the pin, a box seal surface for contacting the pin seal surface and a box torque shoulder for contacting the pin torque shoulder. The pin torque shoulder has a curved pin shoulder surface. The box torque shoulder has a curved box shoulder surface.

Description

[0001]The present invention relates to threaded pipes and connectors for such pipes which may be used in the oil and natural gas industry. For example, a pipe can have an end with a pin that fits into a box at one end of a connector, the pipe and connector being connected by threading. The connector can have a second box for a second pipe with a second pin, so that the pipe and the second pipe are connected via the connector.BACKGROUND[0002]WO Publication No. 84 / 04352 purportedly describes a tubular joint or connector of box and pin members having two-step tapered threads. Two metal to metal seals of complementary engaging sealing surfaces are provided. Reverse angle torque shoulders at the end of the pin member and the interior termination of the box member and hooked threads further characterize the joint and box and pin members.[0003]U.S. Pat. No. 4,623,173 purportedly describes a screw joint coupling for oil pipes. A main sealing portion is provided with a sealing portion which ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F16L15/00E21B17/042E21B19/16
CPCF16L15/002E21B19/16E21B17/042F16L15/004E21B17/046F16L15/00F16L15/001
Inventor EVANS, MERLE E.VAN WITTENBERGHE, JEROEN STIJN JULIAAN
Owner ARCELORMITTAL TUBULAR PROD LUXEMBOURG SA
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