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Electromagnetic method pipe fitting shaping technique

A technology of electromagnetic method and pipe fittings, applied in wellbore/well components, earthwork drilling, etc., can solve problems such as difficulty in controlling explosion shaping repair method, and achieve the effect of environmental protection

Inactive Publication Date: 2013-04-03
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, casing deformation has become a major problem restricting oil production. The existing mechanical bulging repair method is difficult to adapt to the situation of large deformation, and the explosive plastic repair method is difficult to control. Development of a new deformed casing plastic repair method has very important practical significance

Method used

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  • Electromagnetic method pipe fitting shaping technique

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Effect test

Embodiment 1

[0022] In this embodiment, the length of the shaper working rod is 800mm, the one-sided taper angle is 1.2 degrees, the lengths of the L1 and L2 sections are respectively 300mm and 500mm, and the bottom thickness h is 30mm. The working rod gap is 62mm; the gap d is 21mm. After being installed, it is placed in a flat tube with an original inner diameter of 130 mm and a thickness of 3 mm, and a continuous current is applied to the shaper coil (3), and the flat tube slowly expands and returns to its original shape under the action of electromagnetic force.

Embodiment 2

[0024] In this embodiment, the length of the shaper working rod is 800mm, the one-sided taper angle is 1.2 degrees, the lengths of the L1 and L2 sections are respectively 300mm and 500mm, and the bottom thickness h is 30mm. The working rod gap is 62mm; the gap d is 21mm. After being installed, it is placed in a flat tube with an original inner diameter of 130 mm and a thickness of 8 mm, pulse current is applied to the shaper coil (3), and the flat tube is rapidly expanded and restored to its original shape under the action of electromagnetic force.

Embodiment 3

[0026] In this embodiment, the length of the shaper working rod is 800mm, the one-sided taper angle is 1.5 degrees, the lengths of the L1 and L2 sections are respectively 300mm and 500mm, and the bottom thickness h is 30mm. The working rod gap is 62mm; the gap d is 25mm. After installation, it is placed in a flat tube with an original inner diameter of 130 mm and a thickness of 2 mm, and a continuous current is applied to the shaper coil (3), and the flat tube is slowly expanded and restored to its original shape under the action of electromagnetic force.

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Abstract

The invention discloses an electromagnetic method pipe fitting shaping technique. The technique uses two working levers to be movably connected with a supporting body in the middle; the inside of one end of the working lever is provided with a shaper coil; the other end of the working lever is arranged at the flattening part of the pipe fitting; and sustained current or pulse current is introduced into the shaper coil so that the shaper coil generates attractive force, and consequently the pipe fitting can be swollen open for restoration. Compared with other restoration methods, the shaping technique has the advantages of repeatability, controllability, designability and the like and provides a new way for the shaping restoration of pipe fittings.

Description

Technical field [0001] The invention relates to an electromagnetic tube shaping technology and device. Background technique [0002] The pipe fittings are often affected by the environment during use, and the phenomenon of flattening occurs, which affects its normal operation. A typical situation is that the casing of an oil well is easily crushed under the action of ground stress. [0003] In the actual service process, the oil casing is often squeezed, broken, severely deformed and severely corroded due to the squeezing effect of the ground stress and the corrosive wear effect of the corrosive medium, which directly affects the normal production of the oil well, and even Caused the oil well to stop production and scrap. There are more than 2,000 casing damage wells in my country each year, and the economic loss caused by casing damage is as high as tens of billions of yuan. Therefore, casing repair has become a key issue that must be solved in the development of oil fields at ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B29/10
Inventor 郑茂盛忽满利朱秀红马益平桑海峰
Owner NORTHWEST UNIV
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