BIMETAL COMPOSITE PIPE CONNECTING STRUCTURE

Title:

BIMETAL COMPOSITE PIPE CONNECTING STRUCTURE

Document Type and Number:

WIPO Patent Application WO/2023/236474

Kind Code:

A1

Abstract:

A bimetal composite pipe connecting structure, comprising a corrosion-resistant connecting pipe (100), a first bimetal composite pipe fitting (200), a second bimetal composite pipe fitting (300), and a sealing member (400). The corrosion-resistant connecting pipe (100) comprises a first end (101) and a second end (102) arranged opposite to each other; the end portion of the first bimetal composite pipe fitting (200) is embedded in the first end (101); the end portion of the second bimetal composite pipe fitting (300) is embedded in the second end (102); a limiting pipe section (103) is located between the first end (101) and the second end (102); a central axis of the limiting pipe section (103) is the same as that of the corrosion-resistant connecting pipe (100); the outer peripheral wall of the limiting pipe section (103) overlaps with the inner peripheral wall of the corrosion-resistant connecting pipe (100); preset gaps are separately formed between the end portion of the first bimetal composite pipe fitting (200) and the limiting pipe section (103) and between the end portion of the second bimetal composite pipe fitting (300) and the limiting pipe section (103); and the sealing member (400) is disposed in the preset gaps. The sealing member (400) is arranged at connecting positions, so that the purpose of preventing corrosion of the connecting positions is achieved.

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WO/2020/021691	SCREW JOINT FOR PIPE AND METHOD FOR MANUFACTURING SCREW JOINT FOR PIPE
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Inventors:

LIU YONGGANG (CN)
YIN CHENGXIAN (CN)
LI WENSHENG (CN)
SU HANG (CN)

Application Number:

PCT/CN2022/137692

Publication Date:

December 14, 2023

Filing Date:

December 08, 2022

Export Citation:

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Assignee:

CHINA NAT PETROLEUM CORP (CN)
TUBULAR GOODS RES INSTITUTE OF CNPC (CN)
XIAN SANHUAN PETROLEUM MATERIAL TECH CO LTD (CN)

International Classes:

F16L15/04

Foreign References:

CN206904387U	2018-01-19
CN112082014A	2020-12-15
CN201835756U	2011-05-18
CN211423671U	2020-09-04
US6375232B1	2002-04-23
DE102010028262A1	2011-10-27
CA2543186A1	2006-11-04

Attorney, Agent or Firm:

LEADER PATENT & TRADEMARK FIRM (CN)

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