Strain gauge pasting and positioning method in oil and gas pipeline concave deformation strain field measurement

A technology of oil and gas pipelines and positioning methods, applied in the direction of electric/magnetic solid deformation measurement, electromagnetic measurement devices, etc.
CN109780987AActive Publication Date: 2019-05-21BC P INC CHINA NAT PETROLEUM CORP +1
8 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
BC P INC CHINA NAT PETROLEUM CORP
Publication Date
2019-05-21

Smart Images

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

Abstract

The invention discloses a strain gauge pasting and positioning method in oil and gas pipeline sunken deformation strain field measurement, which comprises the following steps: positioning the sunken center of the inner wall of a pipeline, drawing a spiral scale, and manufacturing a spiral strain gauge positioning mold according to the spiral scale; fixing a strain gauge and coating an adhesive; and pasting the strain gauge, and finally taking out the spiral strain gauge positioning mold to complete strain gauge pasting and positioning. According to the invention, a plurality of strain gauges can be simultaneously adhered to specified positions of the inner walls of pipelines with various inner diameters, and meanwhile, pasting devices for the strain gauges can be adjusted according to testrequirements, so that real-time measurement of pipeline inner wall concave strain field response is realized while an oil and gas pipeline concave defect prefabrication test is realized.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of pipeline detection and testing, and in particular relates to a method for sticking and positioning strain gauges in the measurement of the deformation and strain field of oil and gas pipeline depressions. Background technique

[0002] Oil and gas pipeline sag refers to the total deformation of the pipeline cross-section due to the permanent plastic deformation of the pipeline wall, and is one of the common forms of pipeline geometric defects. The influence of sag on the safe operation of the pipeline mainly includes four aspects: sag leads to deformation of the pipe wall, stress concentration and reduces the pressure bearing capacity or directly leads to its rupture and leakage; periodic internal pressure fluctuations may also cause fatigue damage or even fracture in the sag area; For some old pipelines with poor ductility, even if the stress concentration caused by the sag is not large, it may cause crac...

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