Elimination method of slurry pulse signal pump stroke noise

A mud pulse and mud pump technology is applied in the field of eliminating the noise of the mud pulse signal pump, which can solve the problems of unsatisfactory precision and effect, low transmission frequency, and inconvenience in changing filtering parameters, so as to improve the accuracy and effect. , Improve the channel quality, easy to adjust the effect

Inactive Publication Date: 2014-11-05
GOALTECH
View PDF4 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the field of oil logging while drilling, the commonly used signal filtering is completed by hardware circuits, generally passive filter circuits or active filter circuits are used. This method is simple to implement, but when applied to logging while drilling mud pressure For pulse signals, due to their

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Elimination method of slurry pulse signal pump stroke noise
  • Elimination method of slurry pulse signal pump stroke noise
  • Elimination method of slurry pulse signal pump stroke noise

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The present invention will be further described below in conjunction with specific examples.

[0026] The method for eliminating the pumping noise of the mud pulse signal described in this embodiment is as follows:

[0027] First, according to the movement rate of a single mud pump piston, the number of mud pumps and the sampling frequency of the mud signal, the order formula of the comb filter is used: N=Fs / Fo, Fs is the sampling frequency of the mud signal, and Fo is the mud pump piston The cycle frequency of the movement (that is, the product of the piston movement rate of a single mud pump and the number of mud pumps) determines the order N of the comb filter.

[0028] When it is necessary to eliminate the pumping noise, use MATLAB software to realize the filtering process of the mud pulse signal, including the following steps:

[0029] 1) Collect the signal of the riser pressure sensor in logging while drilling, and convert the collected analog signal into a digit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an elimination method of slurry pulse signal pump stroke noise. The order formula (N=Fs/Fo) of a comb filter is utilized, wherein Fs is the sampling frequency of a slurry signal, and Fo is a product of the movement rate of a single slurry pump piston and the number of slurry pumps, and the order of the comb filter is determined; when the pump stroke noise is eliminated, a filtering process of a slurry pulse signal is realized by utilizing MATLAB software, and comprises the following steps: 1) collecting the slurry pulse signal on site; 2) according to the signal to noise ratio of the signal, determining the bandwidth (BW) of the comb filter, designing the required comb filter according to the BW and the determined order; 3) converting the slurry pulse signal to enable a signal value to be within an interval (-1,1), and obtaining a signal X(n); 4) loading the signal X(n) into the comb filter to carry out convolution filtering to obtain a filtered signal Y(n); and 5) plotting, and observing a signal filtering situation. The invention breaks through the restriction of a hardware circuit, the MATLAB software is utilized to effectively realize the filtering process of the slurry pulse signal, and meanwhile, the comb filter is applied to the slurry pulse signal so as to further enhance a filtering effect.

Description

technical field [0001] The invention relates to the technical field of oil drilling logging while drilling, in particular to a method for eliminating pumping noise of mud pulse signals. Background technique [0002] At present, in the field of oil logging while drilling, the commonly used signal filtering is completed by hardware circuits, generally passive filter circuits or active filter circuits are used. This method is simple to implement, but when applied to logging while drilling mud pressure For pulse signals, due to their low transmission frequency, they are relatively close to the frequency of the interference source, so the accuracy and effect of filtering by hardware filtering methods cannot meet the requirements. At the same time, the types of interference signals are different in different environments. The parameters are also very inconvenient. This requires some high-resistance signal processing filters in the system equipment to improve the channel quality o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F19/00E21B47/06
Inventor 王小虎朱晓岭王肄辉刘海熊陵
Owner GOALTECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap