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CN-121977131-A - Combined sleeve for repairing pipeline

CN121977131ACN 121977131 ACN121977131 ACN 121977131ACN-121977131-A

Abstract

The invention provides a combined sleeve for repairing a pipeline, which is formed by splicing a sealing cylinder body and sealing end sockets, wherein cylinder lug plates are arranged on two sides of the sealing cylinder body, an end socket insertion groove is formed in the end socket of the sealing cylinder body, the sealing end socket of the sleeve is provided with the sealing end socket cylinder body, a sealing end socket end cover is arranged above the sealing end socket cylinder body, and the sealing end socket cylinder body is connected with the end socket of the sealing cylinder body. The invention adopts the combined sealing sleeve, effectively solves the problems of quick recovery of the damaged pipeline and no open fire repair, realizes the repair treatment of the main pipe section by the sealing cylinder, realizes the installation without open fire and enhances the secondary sealing effect by the sealing head, and is a safer and more efficient pipeline repair scheme.

Inventors

  • CAO YAXIANG
  • Zhuang Mingzhu
  • ZHU YULING
  • WANG ZHE
  • ZHAO DAN
  • GAO JINGWEI
  • GUO LICHUN
  • HAO GUOQING
  • Sha Zhiyan
  • LIANG YAN

Assignees

  • 中国石油天然气股份有限公司

Dates

Publication Date
20260505
Application Date
20241031

Claims (10)

  1. 1. The combined sleeve for repairing the pipeline is characterized by comprising a sealing cylinder body and sealing end sockets, wherein cylinder body ear plates are arranged on two sides of the sealing cylinder body (1), and end socket insertion grooves (5) are formed in the end sockets of the sealing cylinder body (1); The sealing head of the sleeve is provided with a sealing head cylinder body (13), a sealing head end cover (10) is arranged above the sealing head cylinder body (13), and the sealing head cylinder body (13) is connected with the end head of the sealing cylinder body.
  2. 2. A modular sleeve according to claim 1, characterized in that a cylinder stiffener (2) is also provided on the sealing cylinder.
  3. 3. The combined sleeve according to claim 1, wherein a cylinder end and seal head fixing bolt hole (6) is arranged at the connecting position of the sealing cylinder (1) and the sealing seal head.
  4. 4. The combined sleeve according to claim 1, characterized in that the sealing cylinder (1) is a hollow cavity with an inner diameter of 1.2-1.5 times the outer diameter of the pipe to be repaired.
  5. 5. A combined sleeve according to claim 1, characterized in that a cylinder axial seal groove (9) and a cylinder radial seal groove (8) are provided on the sealing cylinder (1).
  6. 6. The combined sleeve as claimed in claim 1, wherein the barrel lug plate is used for fixing the barrel on a pipeline to be repaired, and stud bolts can be inserted into the barrel lug plate fixing bolt holes (3) and used for fixing the sealing barrel (1) on the pipeline to be repaired.
  7. 7. A modular sleeve as claimed in claim 1, characterised in that the barrel head fixing bolt holes (4) are adapted to screw in bolts to compress the barrel head against the pipe.
  8. 8. The combined sleeve according to claim 1, wherein the sealing head end cover (10) is provided with sealing head and cylinder end fixing bolt holes (11), two sides of the sealing head end cover (10) are provided with sealing head fixing bolt holes (12), and the front end of the sealing cylinder is provided with a sealing head and sealing cylinder inserting groove face sealing groove (14).
  9. 9. The combined sleeve according to claim 1, wherein a sealing head and pipeline contact surface sealing groove (16) and a sealing head axial sealing groove (15) are arranged on the sealing head.
  10. 10. A method of using a modular sleeve as set forth in claim 1, wherein, S1, pressing all sealing strips into sealing grooves of a sealing cylinder body (1); S2, placing the lower half part of the sealing cylinder body (1) below a damaged pipeline; s3, assembling and installing the upper half part and the lower half part of the sealing cylinder body (1) together, and tightening all bolts to form a sealing cavity; S4, screwing bolts into the end socket of the cylinder body and the fixing bolt hole (6) of the end socket; s5, assembling an upper sealing head and a lower sealing head on the pipeline, installing sealing strips, and fixing the sealing strips on the connecting bolts of the end head of the cylinder and the sealing heads; s6, pushing the sealing head and the sealing cylinder tightly, and fastening bolts to form stable sealing between the sealing head and the end of the cylinder; S7, locking the connecting bolts of the upper sealing head and the lower sealing head, so that the sealing head forms stable seal in the axial direction, the sealing head is tightly attached to the pipe wall, and radial auxiliary pressing force is provided for the sealing cylinder body.

Description

Combined sleeve for repairing pipeline Technical Field The invention relates to the technical field of unconventional operation in the oil and gas pipeline operation industry, in particular to a combined sleeve for pipeline repair. Background In the daily operation process of the pipeline, the pipeline is possibly deformed or even damaged due to the damage of the external force of a third party. The problem of damage of the pipeline not only seriously threatens the production and operation of enterprises, but also causes great environmental risks and safety risks for enterprises and residents around the pipeline. At present, the art generally uses type a or type B sleeves for emergency treatment for pipes that are damaged or deformed. However, since these sleeves require welding operations during application, the entire length of the pipe needs to be explosion-proof. In addition, for pipelines with large deformation degrees, the repairing effect of the two sleeves is not ideal. In the prior art, CN101858473A discloses a quick connection method for repairing a damaged pipeline, which is connected by adopting a double-loose-joint ball valve, wherein the double-loose-joint ball valve comprises a double-loose-joint ball valve main body, a bell socket and a nut, when in connection, the damaged part of the pipeline is firstly cut off to form two pipe sections, then each pipe section is respectively inserted into the bell socket of the double-loose-joint ball valve, and finally the pipe sections are fixedly connected by the nut. The invention has the advantages of small volume, convenient installation, low cost and convenient operation. The two ports are equivalent to the socket joint positions of the pipe fitting, the two ports can be tightly connected with the pipe fitting in a matched manner, the bonding can be adopted, the construction method is simple, the operation is convenient, and the installation work efficiency is high. However, the technical scheme has the defects that the sealing performance is possibly reduced due to abrasion in long-term use of the double-loose-joint ball valve, the long-term use is not facilitated, and meanwhile, the connection cannot be applied to a pipeline running at medium and high pressure due to poor sealing performance. The disadvantage of this solution is the need to stop the pipeline. Structural stability is last, and this scheme port adopts socket connection, and stability is relatively poor. From the sealing effect, the annular elastic device of the scheme consists of the rubber sleeve, and can not provide good sealing protection when the annular elastic device faces the corrosion aging failure problem on medium pipelines such as petroleum, natural gas, chemicals and the like. In terms of pipeline deformation processing capacity, the scheme has the advantages that due to the fact that only radial sealing pressure is adopted, an effective sealing cavity cannot be formed under the condition that no cutting is performed when a pipeline limited by a structure is deformed. In the prior art, CN1614291a discloses a pipe repairing device and a pipe repairing method, the pipe repairing device is composed of a steel-plastic bushing, an annular elastic device and a protecting device, the steel-plastic bushing is respectively put into the positions of the ports of the pipe to be repaired and the new pipe, the outer surface of the steel-plastic bushing is connected with the inner surface of the positions of the ports of the pipe to be repaired and the new pipe in an anastomotic manner, the annular elastic device is sleeved at the aligned contact connection position of the pipe to be repaired and the new pipe, and the protecting device is sleeved on the outer surface of the annular elastic device. The invention has the disadvantage of operation condition that the pipeline is required to be stopped and disconnected. The port of the invention adopts a glue connection structure with slightly poorer stability. The two ends of the disconnected pipeline have weak corrosion resistance after long-time running, which affects the aging failure problem. In order to meet the urgent need for rapid recovery of production after damage to the pipe, it is necessary to develop a new type of sleeve which is characterized by being installable without welding and is capable of effectively sealing the deformed region having a length ranging from 200mm to 1200 mm. The design of this new sleeve should allow for quick installation, high sealing performance and effective adaptability to varying degrees of deformation to ensure the integrity and safety of the tubing while minimizing impact on production activities. Disclosure of Invention In view of the urgent need for rapid recovery of damaged pipelines, it is important to develop a sleeve which does not require welding and installation and can seal the deformation region with a length of 200-1200 mm with high efficiency, and a safer and more efficient pipelin