Pressure-volume curve drawing system for pressure testing of pipeline

Abstract

The invention, which belongs to the field of pressure testing of a long-distance oil-gas conveying pipeline, discloses a pressure-volume curve drawing device for pressure testing of a pipeline. The device is composed of a stroke counter, a pressure sensor, a data processing device and a drawing computer. The stroke counter measures a stroke value of a pressure testing pump; the pressure sensor measures a pressure value of a pipeline; the data processing device respectively connected with the stroke counter and the pressure sensor obtains the stroke value of the pressure testing pump and the pressure value of the pipeline; the data processing device processes the stroke value of the pressure testing pump to obtain an actual pressure-rising water injection volume value of the pipeline and outputs the processed corresponding actual pressure-rising water injection volume value of the pipeline and the pressure value of the pipeline to the drawing computer; and the drawing computer obtains an actual pressure-volume curve of pressure testing of the pipeline according to a plurality of corresponding pressure values of the pipeline and the actual pressure-rising water injection volume value of the pipeline. Because of machine measurement for replacing manual measurement and drawing of a pressure-volume curve, the labor costs are saved and the drawing errors are reduced.

Description

technical field [0001] The invention belongs to the field of pressure testing of long-distance oil and gas pipelines, in particular to a pressure-volume curve drawing system for pipeline pressure testing. Background technique [0002] After the pipeline installation is completed, various tests should be carried out on the pipeline according to the design requirements. Pipeline pressure test is a pressure test on the pipeline to check whether the pipeline can bear the pressure of the set threshold to ensure the normal production and operation of the pipeline. In the pipeline pressure test operation, by collecting pressure and volume data and drawing a pressure-volume curve, that is, a P-V curve, to understand the situation of the pipeline pressure test and provide a basis for judging the results of the pipeline pressure test. [0003] The prior art is to manually collect pressure and volume data, usually once every 15 minutes, record these data and manually draw a P-V curve ...

AI Technical Summary

Problems solved by technology

[0005] The operation process of the existing technology is relatively cumbersome, and it is necessary to manually record the data. The error of manual reading is relatively large, and due to the long interval of data collection, it is impossible to monitor the abnormal changes of the pipeline in time. If the stress does not meet the standard or the gas content exceeds the standard and cannot be dealt with in time, it will affect the safety of pipeline construction

Images