Drive motor of underground electric drilling tool

A technology for driving motors and electric drilling tools, which is applied in the field of oil drilling, which can solve the problems of low drilling efficiency and inability to adapt to the complex external environment of high temperature and high pressure in the well, and achieve the effects of improving drilling efficiency, large torque, and reliable sealing

Active Publication Date: 2015-12-16
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
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  • 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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  • Drive motor of underground electric drilling tool
  • Drive motor of underground electric drilling tool
  • Drive motor of underground electric drilling tool

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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

Provided in the invention is a drive motor of an underground electric drilling tool. The drive motor comprises a housing in a cylindrical shape, a rotor shaft, a rotor, a stator, and a piston. The rotor shaft having a central hole penetrates the inside of the housing along the axial direction; an enclosed cavity for filling oil fluid is formed between the rotor shaft and the housing; and the rotor shaft extends out of the cavity and is connected with a load. The rotor is arranged in the cavity and is fixed on the rotor shaft. The stator arranged in the cavity is sleeved between the housing and the rotor. The piston in an annular shape can be sleeved between the rotor shaft and the housing in a sealing and sliding mode at an axial direction; and the piston located at the bottom of the cavity can slide to balance pressures inside and outside the cavity. The provided drive motor has a high efficiency and can adapt to an underground high-temperature high-pressure 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 Applications(China)
IPC IPC(8): H02K11/00H02K5/10H02K5/124H02K21/14
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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