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Electromagnetic method pipe fitting shaping technique

A technology of electromagnetic method and pipe fittings, which is applied in the direction of wellbore/well parts, earthwork drilling and production, etc., can solve the problems such as the difficulty of controlling the explosive plastic repair method, and achieve the effect that the magnetic pulse intensity can be accurately controlled and is conducive to the protection of the environment

Inactive Publication Date: 2009-09-23
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 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

[0023] In this embodiment, the length L of the working rod of the shaper is taken as 800mm, the one-sided taper angle is 1.2 degrees, the lengths of the two sections of L1 and L2 are respectively 300mm and 500mm, and the bottom thickness h is 30mm. The working rod gap is 62mm; the gap d is 21mm. After installation, put it into the flat tube whose original internal diameter is 130mm and thickness is 3mm, feed continuous current to the shaper coil (3), and the flat tube slowly expands and slowly returns to its original shape under the action of electromagnetic force.

Embodiment 2

[0025] In this embodiment, the length L of the working rod of the shaper is taken as 800mm, the one-sided taper angle is 1.2 degrees, the lengths of the two sections of L1 and L2 are respectively 300mm and 500mm, and the bottom thickness h is 30mm. The working rod gap is 62mm; the gap d is 21mm. After installation, put it into the flat tube whose original internal diameter is 130mm and thickness is 8mm, feed pulse current to the shaper coil (3), and the flat tube expands rapidly under the action of electromagnetic force and restores to its original shape.

Embodiment 3

[0027] In this embodiment, the length L of the working rod of the shaper is taken as 800mm, the one-sided taper angle is 1.5 degrees, the lengths of the two sections of L1 and L2 are respectively 300mm and 500mm, and the bottom thickness h is 30mm. The working rod gap is 62mm; the gap d is 25mm. Put it into the flat tube whose original internal diameter is 130mm and thickness is 2mm after installation, feed continuous current to the shaper coil (3), and the flat tube slowly expands slowly under the action of electromagnetic force and returns to its original shape.

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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 a technique and a device for shaping pipe fittings by electromagnetic method. Background technique [0002] Pipe fittings are often affected by the environment during use, and there are phenomena such as flattening, which affect their normal work. In a typical situation, such as oil well casing, it is easy to be flattened under the action of in-situ stress. [0003] During the actual service process, the oil casing is often crushed, broken, severely deformed and severely corroded due to the extrusion effect of the ground stress and the corrosion and wear of the corrosive medium, which directly affects the normal production of the oil well, and even Resulting in oil well shutdown and scrapping. There are more than 2,000 wells with casing damage every year in my country, and the economic losses caused by casing damage are as high as tens of billions of yuan. Therefore, casing repair has become a key problem that must be solved...

Claims

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Application Information

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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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