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Underground cylindrical linear motor stator

A linear motor, cylindrical technology, used in electrical components, electromechanical devices, electric components and other directions, can solve the problems of poor water pressure resistance, poor sealing performance, poor heat dissipation performance, etc., to achieve reliable sealing and increase insulation performance. , The effect of improving heat dissipation conditions

Active Publication Date: 2012-03-21
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcome the problems of poor heat dissipation performance, poor water pressure resistance performance and poor sealing performance of existing cylindrical linear motors

Method used

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Embodiment 1

[0019] Embodiment 1: Taking a linear motor stator with a depth of 1000m used in an oil well with an inner diameter of 124mm as an example, the present invention will be further described in detail.

[0020] refer to figure 1 . The stator of the downhole cylindrical linear motor of the present invention is mainly composed of a lower limit retaining ring 1, a dynamic pressure sealing body 2, a dynamic pressure piston retaining ring 3, a dynamic pressure piston 4, a dynamic pressure piston sealing ring 5, and a dynamic pressure sealing body sealing ring 6 , lower plug sealing ring 7, lower plug 8, stator inner sleeve 9, stator coil 10, stator silicon steel sheet 11, upper plug 12, upper plug sealing ring 13, stator lead wire assembly 14, stator upper sealing body 15. The stator upper sealing body seal ring 16, the upper limit retaining ring 17 and the stator shell 18 are composed.

[0021] The stator housing 18 is in the shape of a circular tube. The inner diameter of the stator ...

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Abstract

The invention relates to an underground cylindrical linear motor stator applied to an underground linear motor used for oil recovery in an oil field. The interior of a stator shell is provided with an annular stator coil and an annular stator silicon steel sheet; dynamic pressure sealing bodies in a torus shape are respectively arranged at the lower part of a lower plug and in the stator case; and the wall of each dynamic pressure sealing body is provided with at least two axial holes, and the axial holes of the dynamic pressure sealing bodies are respectively provided with dynamic pressure pistons in a cylinder shape. The upper part of an upper plug is provided with a stator upper sealing body in the torus shape, the wall of the stator upper sealing body is provided with three wire holes; and a power conducting wire penetrates a thread hole on the upper plug, and the power conducting wire is connected with a stator coil. The upper end and lower end of a stator inner sleeve are respectively welded onto the inner walls of the upper plug and the lower plug by adopting argon arc welding. The underground cylindrical linear motor stator provided by the invention has the effects that sealing on the underground cylindrical linear motor stator in low pressure environment and high pressure environment can be realized; pressure inside a stator can vary along with variation of depth of an oil well; and the operation reliability of a motor is improved and the service life of the motor is prolonged.

Description

technical field [0001] The invention relates to the technical field of oil extraction in oil fields, in particular to an underground linear motor in oil extraction, which is a stator of an underground linear motor. Background technique [0002] In recent years, cylindrical linear motors have gradually been introduced into the oil exploration industry from other industries due to their special motion forms. Because it can perform reciprocating linear motion and can directly drive the downhole reciprocating oil well pump, it has been paid more and more attention in the oil field. For this reason, oilfield scientific and technological workers and on-site engineering and technical personnel research and improve it as a new oil well production technology. So far, linear motors have been used as oil well production power products, and cylindrical linear motors have been used in small-scale field applications in a few oil fields as downhole power. [0003] Cylindrical linear moto...

Claims

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Application Information

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IPC IPC(8): H02K41/02H02K1/12H02K5/10
Inventor 段宝玉郝丽
Owner PETROCHINA CO LTD
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