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Downhole electric drilling tool drive motor

A technology for driving motors and electric drilling tools, applied in the field of oil drilling, can solve the problems of inability to adapt to the complex external environment of underground high temperature and high pressure, low drilling efficiency, etc., and achieve the effects of improving drilling efficiency, large torque and high reliability

Active Publication Date: 2018-01-05
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of oil well drilling, turbine and screw drilling tools are commonly used, but they all have the defect of low drilling efficiency
[0003] Compared with turbine and screw drilling tools, electric drilling tools are a more effective driving method, which is about 20% more efficient than turbine and screw drilling tools, but the existing motors for driving electric drilling tools cannot Defects in adapting to the complex external environment of high temperature and high pressure underground

Method used

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  • Downhole electric drilling tool drive motor
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  • Downhole electric drilling tool drive motor

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Embodiment Construction

[0049] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0050] Such as figure 1 As shown, the present invention provides a downhole electric drilling tool driving motor, which is used to drive a drilling tool for drilling operations. The downhole electric drilling tool driving motor includes a cylindrical casing 20, a rotor shaft 9, a rotor, a stator and a piston 22. Please see also Figure 11 , Figure 12 ;

[0051]Wherein, the rotor shaft 9 has a central hole, which is penetrated in the casing 20 in the axial direction, and forms a closed cavity for filling oil with the casing 20, and the rotor shaft 9 protrudes out of the cavity and can be connected to a load ( or drill bit), the central hole of the rotor shaft 9 is used to discharge the mud produced by drilling, and the oil fil...

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Abstract

The invention provides a driving motor for an electric downhole drilling tool, which comprises: a casing, which is in the shape of a cylinder; a rotor shaft, which has a central hole, and is inserted in the casing along the axial direction, and forms an airtight space between the casing and the casing for filling oil. The chamber, the rotor shaft extends out of the chamber and can be connected to the load; the rotor is located in the chamber and is fixed on the rotor shaft; the stator is located in the chamber and is sleeved between the casing and the rotor; the piston is ring-shaped and can The axial sliding sealing sleeve is installed between the rotor shaft and the casing, the piston is located at the bottom of the chamber, and can balance the pressure inside and outside the chamber through sliding. The downhole electric drilling tool driving motor of the present invention has high efficiency and can adapt to downhole high temperature, high pressure and complex external environment.

Description

technical field [0001] The invention relates to the field of petroleum drilling, in particular to a downhole electric drilling tool driving motor with high efficiency, simple structure and high reliability. Background technique [0002] In the process of oil well drilling, turbine and screw drilling tools are commonly used, but they all have the defect of low drilling efficiency. [0003] Compared with turbine and screw drilling tools, electric drilling tools are a more effective driving method, which is about 20% more efficient than turbine and screw drilling tools, but the existing motors for driving electric drilling tools cannot Adapt to the shortcomings of the complex external environment of high temperature and high pressure underground. Contents of the invention [0004] The purpose of the present invention is to provide a downhole electric drilling tool driving motor, which has high efficiency and can adapt to the complex external environment of high temperature a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K11/21H02K11/30H02K5/10H02K5/124H02K21/14
Inventor 王宏伟侯福祥周志雄范应璞张全立彭嵩
Owner BC P INC CHINA NAT PETROLEUM CORP
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