Measurement method of weak mud pulse pressure wave under high standing pressure

A technology of mud pulse and measurement method, which is applied in the direction of pressure difference measurement, measurement, and measurement devices among multiple valves, to achieve accurate measurement, reduce bit error rate, and the effect of simple and reliable method
CN112393844BActive Publication Date: 2022-02-08BC P INC CHINA NAT PETROLEUM CORP +1
6 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BC P INC CHINA NAT PETROLEUM CORP
Publication Date
2022-02-08

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to the technical field of a method for measuring information while drilling downhole oil and gas, and is a method for measuring weak mud pulse pressure waves under high vertical pressure, which includes determining error and resolution, static calibration, dynamic electrical calibration, static pressure There are six steps for pipeline dynamic pressure isolation, installation and diaphragm protection, and improvement of accuracy. The present invention can satisfy the extremely low-level dynamic pressure measurement under the high mud standpipe pressure, can withstand the high mud riser pressure, and has a wide range of dynamic pressure measurement; at the same time, it meets the extremely low-level measurement accuracy and avoids the strain type measurement method 1. Zero drift and working frequency interference problems of the piezoelectric measurement method; the method of the present invention can effectively adapt to the mud pulse signal measurement environment, accurately measure, significantly reduce the bit error rate, and has great practical value.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of a method for measuring downhole drilling information of oil and gas, and relates to a method for measuring weak mud pulse pressure waves under high standing pressure. Background technique

[0002] The mud pulse pressure wave signal transmitted in the drill string is essentially generated by the compressibility of the mud, and the reliability of the monitoring and control data while drilling is based on the reliability of various measurement data. In the process of the mud pulse signal propagating along the mud medium in the drill string, the pulse signal is affected by various factors such as well depth, transmission frequency, mud density, friction resistance of the inner wall of the drill string, drilling pump pressure, etc., and its transmission process is a continuous attenuation. As a result, the amplitude of the pressure wave signal collected by the ground decoding system is small and the noise is l...

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