Special-shaped B-type sleeve repairing method for large deformation defect of long oil and gas conveying pipeline
A technology for large deformation and oil and gas transportation, applied in the direction of tubular objects, other household appliances, household appliances, etc., can solve the problems of non-conformity of installation specifications, poor maintenance and construction effect of large deformation defects, poor matching accuracy, etc., to improve the pressure bearing. Ability, strong repair effect, easy construction and operation effect
Pending Publication Date: 2022-04-05
PIPECHINA SOUTH CHINA CO +1
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Problems solved by technology
[0004] In view of the defects in the prior art, the purpose of this application is to provide a repair method for the special-shaped B-shaped sleeve for the large deformation defect of the long-distance oil and gas pipeline, so as to solve the problem of the matching of the repair method due to the large deformation defect of the pipeline in the prior art. Due to reasons such as poor precision and non-compliance with the installation specifications, the technical problem of poor repair and construction effect on large deformation defects
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Embodiment 1
[0020] Such as figure 1 As shown, the application provides a method for repairing a large deformation defect of a long-distance oil and gas pipeline with a special-shaped B-type sleeve, wherein the method includes:
[0021] S100: Modeling the original size of the large deformation defect of the pipeline by gypsum paste, and obtaining the gypsum modeling result;
[0022] Specifically, the gypsum paste is made by mixing and dissolving calcium sulfate hemihydrate with water in an appropriate proportion, then coating it on the surface of the pipeline, and cutting it off after the gypsum is solidified, which is to model the gypsum. result. The large deformation defects of the pipeline include pipeline miter joints, pipeline butt joint misalignment, depressions, bulges, folds, and deformation defects with an ellipticity greater than 1.5%-2.5% that affect the overall strength and integrity of the pipeline. Take an unrestricted example: the target defect to be repaired is a pipeline...
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Abstract
The invention discloses a special-shaped B-type sleeve repairing method for a large deformation defect of a long oil and gas pipeline. The method comprises the steps that a gypsum modeling result is obtained; a special-shaped B-type sleeve is manufactured according to the drawing of the large deformation defect of the pipeline and the gypsum modeling result; welding to the large deformation defect position of the pipeline according to a first preset welding rule; carrying out air tightness detection on the special-shaped B-type sleeve; resin adhesive is obtained; the resin adhesive is injected into the special-shaped B-type sleeve through the n adhesive injection holes; and injecting the resin adhesive into the m adhesive overflow holes. The technical problems that in the prior art, due to the fact that a repairing method for the large deformation defect of the pipeline is poor in matching precision, and the installation specification does not meet the requirement, the repairing construction effect on the large deformation defect is poor are solved.
Description
technical field [0001] The invention relates to the field of repairing large deformation defects of pipelines, in particular to a special-shaped B-shaped sleeve repair method for large deformation defects of long-distance oil and gas pipelines. Background technique [0002] Long-distance oil and gas pipelines pass through a vast area with complex geological features. Due to external forces such as geological movement and flood erosion, the pipeline may have large deformation defects such as depressions, folds, and excessive ellipse. Pipe miter joints, misalignment, etc. caused by irregular welding and irregular operation of mechanical equipment during pipeline laying operations are also defects of large deformation. Large deformation defects such as excessive bending deformation and pipe miter joints may not only cause pipe wall fracture, but also cause plastic deformation of the pipe, resulting in a decrease in pipe strength and, under certain conditions, buckling failure ...
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IPC IPC(8): B29C73/02B29C73/24B29L23/00
Inventor 郭旭杨晗黄安东赵建涛蔡越李荣光王禹钦富宽徐葱葱蔡德宇
Owner PIPECHINA SOUTH CHINA CO