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A shear type mud pulse generating device

A technology of mud pulse and generating device, which is applied in measurement, wellbore/well components, earthwork drilling and production, etc. It can solve problems such as poor sealing effect of piston parts, large moment of inertia of rotor drive shaft, and easy failure of sealing parts. Achieve simple and reliable structure, increase service life and reliability, and reduce the risk of mud intrusion

Active Publication Date: 2020-11-10
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problems existing in the existing mud pulse generator are: the inertia of the rotor drive shaft is large, the control is difficult, the energy consumption of the system is high, and the piston part is arranged between the rotor part and the stator part, that is, the two sides of the piston part Large state differences lead to poor sealing effect, and sealing parts are prone to failure

Method used

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  • A shear type mud pulse generating device
  • A shear type mud pulse generating device
  • A shear type mud pulse generating device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A shear type mud pulse generating device, such as Figure 1-Figure 3 As shown, it includes a pulse generating part, a driving part and a housing 3, wherein the pulse generating part includes a stator 11 and a rotor 12 arranged in cooperation, and mud flow holes 4 are arranged on the stator 11 and the rotor 12; the driving part includes a motor 21 and a rotor driving part 22, one end of the rotor driving part 22 is connected to the motor 21 shaft, and the other end of the rotor driving part 22 is connected to the rotor 12; The oil immersion space 5; the rotor driver 22 is provided with a hollow part 6, one end of the hollow part 6 communicates with the outside world, the other end of the hollow part 6 is a blind hole, and the side wall of the hollow part 6 is provided with a hole that communicates with the oil immersion space 5 The oil hole 61 and the hollow portion 6 are provided with a first balance plunger 62 .

[0038] When in use, the shear type mud pulse generatin...

Embodiment 2

[0052] This embodiment also includes a second balance plunger 7 on the basis of Embodiment 1, such as Figure 1-Figure 3 As shown, the second balance plunger 7 is arranged between the rotor driving member 22 and the housing 3 , and the second balance plunger 7 is arranged between the oil hole 61 and the rotor 12 in the axial direction.

[0053] In the actual work of the second balance plunger 7, under normal conditions, the second balance plunger 7 is mainly used to prevent mud from entering from the space between the rotor drive member 22 and the housing 3, and the second balance plunger 7 mainly rotates The dynamic sealing function is the main function, on the other hand; the second balance plunger 7 and the first balance plunger 62 in Embodiment 1 can also cooperate with each other to do reciprocating motion; when the external mud pressure is relatively high, the first balance plunger moves toward the The direction movement of the motor 21 is used for pressure compensation,...

Embodiment 3

[0058] On the basis of Embodiment 1, a third balance plunger 8 is also included, such as Figure 1-Figure 3 As shown, the third balance plunger 8 is arranged between the shaft of the motor 21 and the housing 3, as Figure 5 As shown, the third balance plunger 8 includes a third plunger body 81, and the third plunger body 81 is provided with an oil passage 811 and a one-way valve 812, and one end of the one-way valve 812 communicates with the oil passage 811, and the one-way The other end of the valve 812 is in communication with the oil immersion space 5, the end of the third plunger body 81 close to the shaft of the motor 21 is provided with a third seal 813, and the end of the third plunger body 81 close to the inner wall of the housing 3 is provided with a fourth Seal 814 .

[0059]When working, the third balance plunger 8 is used to protect the motor 21 and put mud into the motor 21. A one-way valve 812 is set in the third balance plunger 8 so that the liquid can only flo...

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Abstract

The application provides a shearing mud pulse generating device, which includes a pulse generating part, a driving part, and a casing. The pulse generating part includes a stator and a rotor arranged in cooperation, and mud flow holes are arranged on the stator and the rotor; The part includes a motor and a rotor drive part, one end of the rotor drive part is connected to the motor shaft, and the other end of the rotor drive part is connected to the rotor; the casing is arranged on the periphery of the drive part, and the oil-immersed space is between the drive part and the inner wall of the casing; the rotor A hollow part is set in the driving part, one end of the hollow part is connected with the outside world, the other end of the hollow part is a blind hole, the side wall of the hollow part is provided with an oil hole connected with the oil immersion space, and a first balance column is arranged in the hollow part stuffed. The hollow setting of the rotor drive can not only reduce the inertia of the rotating shaft, make the device easier to control, reduce power consumption, but also improve the sealing effect and effectively prevent mud from entering.

Description

technical field [0001] The application belongs to the technical field of petroleum downhole instruments, and in particular relates to a shear type mud pulse generating device. Background technique [0002] During the oil drilling process, the measurement-while-drilling system undertakes the measurement function of wellbore trajectory parameters. After the measurement and calculation are completed, the bottom-hole parameters need to be uploaded through the downhole information upload device. At present, the two commonly used information upload methods are electromagnetic wave and mud pulse information. The upload method, electromagnetic wave signal transmission is obviously limited by the depth of the well, which is not suitable for deep wells. The information upload method in the form of mud pulse is more commonly used. The downhole control system converts downhole parameter information into pressure pulse signals through appropriate coding methods and transmits them to the g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/18
CPCE21B47/18
Inventor 刘庆波底青云王向阳
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI