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Embedded stator and screw motor

A screw motor, embedded technology, applied in the field of oil drilling, can solve the problem of affecting the impact resistance, deformation resistance and service life of the stator casing, affecting the impact resistance and deformation resistance of the stator casing 10, and reducing the output of the screw motor. Power and working efficiency, etc., to achieve good pressure bearing capacity, improve operating efficiency, and prolong life.

Pending Publication Date: 2022-05-10
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the thickness of the rubber layer at each position on the rubber bushing 20 is different, the pressure bearing capacity at the thinner position is poor, thereby affecting the impact resistance and deformation resistance of the stator housing 10, and reducing the output power and work efficiency of the screw motor. , shorten the life of the screw motor
[0005] In the related art, the thickness of the rubber layer at each position of the screw motor stator is different, which affects the impact resistance, deformation resistance and service life of the stator shell, and no effective solution has been given so far.

Method used

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  • Embedded stator and screw motor
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  • Embedded stator and screw motor

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Embodiment approach 1

[0039] Such as figure 2 , image 3 As shown, the present invention provides an embedded stator, including a stator shell 1 and a first bush 2, the stator shell 1 is a cylindrical structure with two ends open, and the first bush 2 is a spiral cylindrical structure with both ends open structure (that is, the outer wall and the inner wall of the first bushing 2 are provided with helical bosses with the same helical direction), and the thickness of each position on the first bushing 2 is equal; the inner wall of the stator housing 1 is formed with The first helical boss matched with the first bushing 2, the first bushing 2 is arranged inside the stator housing 1 along the axial direction, the outer wall of the first bushing 2 is in close contact with the inner wall of the stator housing 1 and Fixedly connected, a helical chamber for accommodating the rotor is formed inside the stator casing 1 .

[0040] In the present invention, a helical first boss is formed on the inner wall ...

Embodiment approach 2

[0057] The present invention provides a screw motor. The screw motor includes the above-mentioned embedded stator and a rotor matched with the embedded stator. The axial direction of the type stator can be rotatably arranged inside the embedded stator, and there is a helical gap between the outer wall of the rotor and the inner wall of the first bushing 2 .

[0058] Further, the spiral direction of the second boss is the same as that of the first boss, and the number of the second boss is less than that of the first boss.

[0059] Features and advantages of screw motor of the present invention are:

[0060] The stator casing 1 of the screw motor is provided with a first bush 2 with equal thickness at each position, which enhances the impact resistance and deformation resistance of the stator casing 1, and is conducive to the rapid dissipation of heat on the stator casing 1, not only The service life of the stator shell 1 can be extended, and the operating efficiency and outpu...

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Abstract

The invention relates to an embedded stator and a screw motor, the embedded stator comprises a stator shell and a first bushing, the stator shell is of a cylindrical structure with two open ends, the first bushing is of a spiral cylindrical structure with two open ends, and the thicknesses of all positions on the first bushing are equal; a spiral first boss matched with the first lining is formed on the inner wall of the stator shell, the first lining is arranged in the stator shell in the axial direction and fixed to the inner wall of the stator shell, the outer wall of the first lining is tightly attached to the inner wall of the stator shell, and a spiral cavity for containing the rotor is formed in the stator shell. The technical problem that the impact resistance, the deformation resistance and the service life of the stator shell are affected due to the fact that the thicknesses of rubber layers at all positions of the screw motor stator are different is solved.

Description

technical field [0001] The present invention relates to the technical field of petroleum drilling, and further relates to an embedded stator and screw motor, in particular to an embedded stator and screw motor used in deep wells and ultra-deep wells. Background technique [0002] The screw drilling tool is the most widely used downhole dynamic drilling tool in the field of oil and natural gas drilling at home and abroad, especially in directional wells and horizontal wells. It plays an irreplaceable role. With the development of oil and gas drilling and the requirement of drilling speed increase, more requirements are put forward for downhole power drilling tools (such as: drilling tool service life, high temperature resistance, mud corrosion resistance, meeting the needs of special process wells, etc.). [0003] The structure of embedded screw drilling tools is basically the same as that of ordinary screw drilling tools, including bypass valve assembly, motor assembly, card...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03C2/08E21B4/02
CPCF03C2/08E21B4/02
Inventor 黄衍福于兴胜罗西超刘凤郭添鸣王宇鹏张洪霖郭晨李兴杰米凯夫宋建刘欣欣杜迎军
Owner BC P INC CHINA NAT PETROLEUM CORP