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Screw drilling tool motor stator

A technology of motor stator and screw drilling tool, which is applied in the manufacture of stator/rotor body, earthwork drilling, drilling equipment, etc., can solve the problems affecting the working efficiency and service life of the screw drilling tool motor, the damage of stator rubber, and the small amount of deformation. , to achieve the effect of small difference in expansion, extended service life and not easy to wear

Active Publication Date: 2010-02-24
KINGDREAM PLC CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can avoid the heat failure of the over-thick part of the rubber bushing. However, from the application point of view, when the drilling pressure is too high, the deformation of the equal-wall rubber bushing is relatively small, and the rotor is easily stuck in the stator. Not easy to discharge will also cause damage to the stator rubber, affecting the working efficiency and service life of the screw drilling motor

Method used

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  • Screw drilling tool motor stator
  • Screw drilling tool motor stator
  • Screw drilling tool motor stator

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Embodiment Construction

[0014] The embodiment of the present invention will be further described below in conjunction with the accompanying drawings, including a housing 1 and a rubber bushing 2, the rubber bushing is bonded to the inner hole of the housing by vulcanization of wear-resistant rubber, and the inner hole 3 of the rubber bushing is a continuous helical line , the radial cross-section is uniformly distributed petals in the circumferential direction, and the number of petals is 6. On the radial cross-section, each petal of the rubber bushing is from the lowest point of the concave (the largest radius) to the highest point of the outer convex (the smallest radius). The wall thickness is increasing, that is, the wall thickness is gradually thickened, and the maximum thickness is 1.6 times the minimum thickness. The curve formed by the outer peripheral surface 4 of each petal on the radial section of the rubber bush from the lowest concave point to the highest convex point is Short hypocycloid...

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Abstract

The invention relates to a motor stator which is used for the petroleum and natural gas well-drilling field and is matched with the screw drilling tool. The motor stator comprises a casing and a rubber bushing. The rubber bushing is bonded with the inner opening of the casing. The inner opening of the rubber bushing is of a continuous spiral type. The radial cross section is of a circumferential uniformly-distributed petal shape. The difference is that the wall thickness of the rubber bushing at the radial cross section is not even. The wall thickness of each petal of the rubber bushing at the radial cross section from the lowest part of the dent to the highest part of the projection gradually increases. The largest thickness is 1.2-2 times of the smallest thickness. The shape of each petal on the radial cross section is same,The motor stator of the invention not only can prevent the damage of the stator rubber caused by the easy blocking of the rotor in the stator and no easy discharge of the slurry pressure when an overgreat drilling pressure generates on the stator with same wall thickness, but also prevents the problem of over-early failure caused by the large wall thickness difference of the rubber bushing and easy heat accumulation to the part with thick rubber. Therefore the advantages of greatly increasing the efficiency of the motor stator and effectively prolonging the service lifetime are obtained.

Description

technical field [0001] The invention relates to a motor stator used in the field of oil and natural gas drilling and the configuration of screw drilling tools. Background technique [0002] Screw drilling motor is currently the most widely used downhole power drilling tool, mainly used for deflection and torsion azimuth construction in directional wells and horizontal wells, and partly used in reverse buckling or sidetracking operations in vertical wells. The United States began to develop screw drilling tools in the mid-1950s. It was used for production in 1962. Different manufacturers produced Dina drilling tools (Smith Company), Navier drilling tools (Christensen Company) and Persian drilling tools. The basic principles are based on volume type motor. The motor stator of traditional screw drilling tools, such as figure 1 As shown, the rubber is vulcanized in the steel pipe shell (1) to form a rubber bushing (2). The inner hole of the steel pipe shell is circular, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/12H02K15/02E21B4/00
Inventor 张小俊
Owner KINGDREAM PLC CO
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