Shearing type slurry pulse generation device

A technology of mud pulse and generating device, which is used in surveying, wellbore/well components, earth-moving drilling, etc., can solve the problems of poor sealing effect due to the difference in the state of piston components, large inertia of rotor drive shaft motion, and easy failure of sealing components, etc. Achieve the effect of simple and reliable structure, increase service life and reliability, and reduce the risk of mud invasion

Active Publication Date: 2020-06-05
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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  • Shearing type slurry pulse generation device
  • Shearing type slurry pulse generation device
  • Shearing type slurry pulse generation 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 1, a driving part 2 and a housing 3, wherein the pulse generating part 1 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 part 2 includes a motor 21 and a rotor driving part 22, one end of the rotor driving part 22 is connected to the motor 21, and the other end of the rotor driving part 22 is connected to the rotor 12; the casing 3 is arranged on the periphery of the driving part 2, and the driving part 2 is connected to the shell Between the inner walls of the body 3 is an oil immersion space 5; the rotor driving member 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 an immersion hole. The oil space 5 communicat...

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 large, the first balance piston moves toward the motor 21 direction movement is used for pressure compensation, but when the external...

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 invention provides a shearing type slurry pulse generation device. The shearing type slurry pulse generation device comprises a pulse generation part, a driving part and a shell, wherein the pulsegeneration part comprises a stator and a rotor which are matched with each other; slurry flow through holes are formed in the stator and the rotor; the driving part comprises a motor and a rotor driving part; one end of the rotor driving part is connected with a motor shaft, and the other end of the rotor driving part is connected with the rotor; the shell is arranged at the periphery of the driving part; an oil immersion space is formed between the driving part and the inner wall of the shell; a hollow part is arranged in the rotor driving part; one end of the hollow part is communicated with the outside; a blind hole is formed in the other end of the hollow part; an oil through hole communicated with the oil immersion space is formed in the side wall of the hollow part; and a first balance plunger is arranged in the hollow part. According to the shearing type slurry pulse generation device, the rotor driving part is hollow, so that the inertia of the rotating shaft can be reduced; the device is more easily controlled; the power consumption can be reduced; the sealing effect can also be improved; and the device is capable of effectively preventing the slurry from entering the device.

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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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
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