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Method for producing a threaded pipe joint, and suit assembly and sealing ring used therefor, and threaded pipe joint

A technology for sealing rings and threaded pipes, which is applied in the direction of threaded connections, connecting components, pipes/pipe joints/fittings, etc. It can solve the problems of increased pipe end thickness, increased cost, and cracks on the sealing surface, achieving simple sealing rings and simple The effect of installation

Inactive Publication Date: 2009-05-06
VALLOUREC OIL & GAS FRANCE SAS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cyclic stress on the subsea pipe string caused by subsea currents due to mutual sliding of the inner and outer threaded surfaces can cause cracks in the sealing surface
Of course, it is conceivable to provide an axially fitted support to the free end of the threaded pipe to prevent such slippage, but this would result in an increased thickness at least at the end of the pipe and consequently increased costs

Method used

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  • Method for producing a threaded pipe joint, and suit assembly and sealing ring used therefor, and threaded pipe joint
  • Method for producing a threaded pipe joint, and suit assembly and sealing ring used therefor, and threaded pipe joint
  • Method for producing a threaded pipe joint, and suit assembly and sealing ring used therefor, and threaded pipe joint

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Embodiment Construction

[0052] The drawings include the essentials of the character. Therefore, they are not only used to provide a better understanding of the description, but also help to define the invention when necessary.

[0053] The threaded male fitting or rod of Figure 1 is formed at one end of a very long tube 101, ie several meters long. It comprises a trapezoidal continuous tapered external thread 3 . Over a region 11 of its length, the thread 3 is formed by a complete thread with a constant thread height equal to the nominal value between the thread root envelope 15 and the thread crest envelope 16, both root and crest truncated cone. In the remaining area 13 of the thread, the thread is incomplete, or is the end of the thread, the envelope of the root of the frusto-conical thread extends to the envelope of the complete thread, the envelope of the top of the thread is defined by the cylindrical outer surface of the pipe 101 Surface 19 constitutes.

[0054] The tube 1 includes a male ...

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Abstract

In threaded connections with tapered external and internal threads (3, 4), an annular cavity (20) is provided near the free end of the female pipe (2), which cavity accommodates a radially compressed deformable sealing ring A part of (130), while due to a rib (53) on the male pipe, a detent land (143) of the sealing ring (130) cannot move in the other annular cavity (18) of the female pipe. The invention can be applied to the pipe connection of oil and gas wells.

Description

technical field [0001] The invention relates to a method for manufacturing a threaded pipe connection, comprising: a male pipe fitting with a tapered external thread, a female pipe fitting with a tapered internal thread matched with the above-mentioned external thread, and a male pipe fitting inserted between the male pipe fitting and the female pipe fitting A deformable sealing ring in between to prevent fluid communication between the outside of the threaded pipe connection and the above-mentioned thread mating area. Background technique [0002] Threaded pipe connections are known in which a male fitting is formed at one end of a very long pipe and a female fitting is formed at one end of another very long pipe or a shorter fitting in the form of a sleeve called a "coupling" Connectors, which allow a number of pipes to be assembled end-to-end in a string, especially for oil and gas wells, where the above-mentioned string of pipes is used to produce oil and gas (pipe strin...

Claims

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Application Information

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IPC IPC(8): F16L15/04
CPCF16L15/003Y10T29/49428Y10T29/53987F16B2200/403
Inventor G·鲁西耶
Owner VALLOUREC OIL & GAS FRANCE SAS
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