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A device for generating downhole mud pulse signal

A technology for generating devices and mud pulses, applied in wellbore/well components, measurement, earth-moving drilling, etc., can solve the problems of low precision and slow transmission of pressure signals, and achieve the effect of improving adaptability and flexibility

Active Publication Date: 2017-01-25
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention is that the transmission speed of the pressure signal in the prior art is slow and the precision is not high, so a kind of generation device of the downhole mud pulse signal that can be fast and accurate is proposed

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  • A device for generating downhole mud pulse signal
  • A device for generating downhole mud pulse signal
  • A device for generating downhole mud pulse signal

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Embodiment Construction

[0034] A device for generating downhole mud pulse signals according to the present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] A generator of mud pulse signal, such as Figure 4 As shown, it includes a shell and a pulse generator arranged inside the shell, wherein the pulse generator includes:

[0036] A plurality of driving valves 1, each of which has a built-in sensor, and transmits the detected mud pressure and valve position signals to the control system;

[0037] The driving rod 2 is connected with the driving valve 1 one by one, and controls the up and down movement of the driving valve 1;

[0038] The limit seat 3 is arranged on the outside of the drive valve 1, matching the size and shape of the drive valve 1, and the size of the moving area of ​​the drive valve 1 is limited by the two limit seats 3;

[0039] A plurality of mud passages 4, the opening and closing of the mud passages 4 are controlled by the degre...

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Abstract

The invention provides a down-hole slurry pulse signal generation device. The down-hole slurry pulse signal generation device comprises a plurality of driving valves and a plurality of communication systems corresponding to the driving valves in a one-to-one mode. Due to the arrangement of the multiple driving valves, the types of generated data signals while drilling is more; due to the arrangement of the independent communication systems, the overall transmission speed can be effectively guaranteed, and the precision of detection is guaranteed to a certain extent. In addition, in combination with multiple modulation modes, the data transmission rate is further increased. The signals can be controlled to be strong or weak through selection of the outer diameter of each driving valve and the inner diameter of a limiting base so that the transmitting speed of the data signals while drilling can be guaranteed, the downhole slurry pulse signal generation device can be suitable for working environments with different wells, different displacements and different well depths, and therefore the adaptability to the various environments is greatly improved; the number of working driving valves can be controlled, and therefore high flexibility is obtained.

Description

technical field [0001] The invention belongs to the field of downhole surveying instruments, and relates to a mud pulse generator, in particular to a downhole mud pulse signal generation device. Background technique [0002] In recent years, with the continuous development of oil, natural gas, gas and geological exploration drilling technology, MWD (MeasureWhileDrilling, measurement while drilling), LWD (LoggingWhileDrilling, logging while drilling) and other wireless while drilling tools are more and more used in the market. more extensive. The pulse generator is the most important part of the wireless measurement-while-drilling system, which mainly transmits signals through the pressure wave of the mud. The basic principle of mud pulse transmission is that the signal measured by the downhole sensor is coded, and the drive control circuit of the pulse generator drives the cone valve, rotary valve or rotor of the mud pulse generator to produce a blocking effect, thereby gen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/18
Inventor 刘策李敬吴素明王华平梁任岳任威
Owner BC P INC CHINA NAT PETROLEUM CORP
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