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Pressure testing device and method for cleaning pipeline

A pressure testing and pipeline technology, applied in the field of pipeline pigging pressure testing devices, can solve problems such as hidden safety hazards, low construction efficiency, large workload, etc., and achieve the effects of flexible and convenient construction, improved work efficiency, and reduced labor intensity.

Active Publication Date: 2014-09-03
CHUANZHONG BRANCH KEHONG GASOLINEEUM NATURAL GAS ENG SICHUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In order to solve the problems of heavy workload, low construction efficiency and potential safety hazards caused by repeated welding and cutting of pipelines in the existing pipeline cleaning and pressure testing work, the present invention provides a pipeline pigging pressure testing device and method, which can be used in While ensuring that pigging, pressure testing and other processes comply with the technical regulations for pipeline construction and pressure testing, the pipeline pigging and pressure testing device is welded to the pipeline to realize pigging and pressure testing operations, as well as diameter measurement, drying, nitrogen injection, etc. operation; reduce the number of pipe welding and cutting, thereby reducing the workload of on-site staff, improving construction efficiency, and reducing the safety hazards of repeated cutting and welding of pipes

Method used

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  • Pressure testing device and method for cleaning pipeline
  • Pressure testing device and method for cleaning pipeline
  • Pressure testing device and method for cleaning pipeline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] The pipeline pigging pressure test device of this embodiment includes two pressure test heads, which are connected to the two ends of the pipeline 16 respectively. It is connected to the pipeline, and the other end is a reduced-diameter structure equipped with blind plates 1A, 1B and anti-collision airbags 15A, 15B; two pigs are arranged in the cylinder, which are called the first pig 6 and the second pig respectively. The pig 10, at this time, the opening and outlet on the upper part of the cylinder should ensure that the water or compressed air in the pipeline and between the pigs can be discharged to prevent air dead ends.

[0074] Therefore, at this time, the upper part of the cylinder is provided with first inlets 3A, 3B, second inlets 8A, 8B, first outlets 5A, 5B and second outlets 9A, 9B; the first inlet 3A is located between the blind plate 1A and the first clearing On the cylinder between the pipe cleaners 6, the first outlet 5A is located on the cylinder betwe...

Embodiment 2

[0104] The pipeline pigging pressure test device of this embodiment includes two pressure test heads, which are connected to the two ends of the pipeline 16 respectively. It is connected to the pipeline, and the other end is a reduced-diameter structure equipped with blind plates 1A, 1B and anti-collision airbags 15A, 15B; two pigs are arranged in the cylinder, which are called the first pig 6 and the second pig respectively. The pig 10, at this time, the opening and outlet on the upper part of the cylinder should ensure that the water or compressed air in the pipeline and between the pigs can be discharged to prevent air dead ends.

[0105] Therefore, at this time, the upper part of the cylinder is provided with the first inlet 3A, 3B, the second inlet 8A, 8B, the third inlet 11A, 11B, the first outlet 5A, 5B and the second outlet 9A, 9B; the first inlet 3A is located at On the cylinder between the blind plate 1A and the first pig 6, the first outlet 5A is located on the cyli...

Embodiment 3

[0135] The pipeline pigging pressure test device of this embodiment includes two pressure test heads, which are connected to the two ends of the pipeline 16 respectively. It is connected to the pipeline, and the other end is a reduced-diameter structure equipped with blind plates 1A, 1B and anti-collision airbags 15A, 15B; two pigs are arranged in the cylinder, which are called the first pig 6 and the second pig respectively. The pig 10, at this time, the opening and outlet on the upper part of the cylinder should ensure that the water or compressed air in the pipeline and between the pigs can be discharged to prevent air dead ends.

[0136] Therefore, at this time, the upper part of the cylinder is provided with first inlets 3A, 3B, second inlets 8A, 8B, first outlets 5A, 5B and second outlets 9A, 9B; the first inlet 3A is located between the blind plate 1A and the first clearing On the cylinder between the pipe cleaners 6, the first outlet 5A is located on the cylinder betwe...

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Abstract

The invention discloses a pressure testing device and method for cleaning a pipeline, for solving the problems of high workload, low construction efficiency and potential safety hazards caused by repeated welding of the pipeline in the pipeline cleaning and pressure testing work. The pressure testing device comprises two pressure testing heads, wherein the two pressure testing heads are respectively connected to the two ends of the pipeline; each pressure testing head comprises a drum body; one end of the drum body is used for connection with the pipeline, and the other end of the drum body is provided with a matched blind plate; the drum body is internally provided with an anti-collision air bag which is close to the blind plate; the upper part of the drum body is provided with an opening for entering and exiting of compressed and air, and the lower part of the drum body is provided with a sewage outlet; and a pipe cleaner is arranged in the drum body in a matching manner. The pressure testing device disclosed by the invention is arranged on the pipeline, then the procedures of cleaning the pipeline, measuring the diameter and testing the pressure and the like can be finished, the workload is reduced and the safety performance is improved simultaneously.

Description

technical field [0001] The invention belongs to the field of oil and gas pipelines, in particular to a pipeline pigging and pressure testing device and method, which are used for pigging and pressure testing operations on oil and gas pipelines. Background technique [0002] After the welding of oil and gas pipelines is completed, pigging (removal of residues in the pipeline), diameter measurement, pressure testing, drying and other processes are required to check whether the pipeline meets the process requirements. [0003] During the pressure test stage of pipeline construction, the pig transceiver device is first welded to both ends of the pipe section for pigging operation, and the pig transceiver device at both ends is cut and removed after completion; then the pressure test head is welded to the pipeline to carry out After water injection and pressure test, after sweeping the water, cut it off and remove it; then weld and install the pig transceiver device, and carry ou...

Claims

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Application Information

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IPC IPC(8): G01N3/12G01M3/02G01B21/10B08B9/055
Inventor 陈高阳
Owner CHUANZHONG BRANCH KEHONG GASOLINEEUM NATURAL GAS ENG SICHUAN
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