Title:
HIGH-FREQUENCY INDUCTION WELDED HIGH ALLOY ANTI-CORROSION COILED TUBING AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/034050
Kind Code:
A1
Abstract:
Disclosed is a high-frequency induction welded high alloy anti-corrosion coiled tubing. The coiled tubing is a ferrite-austenite duplex stainless steel coiled tubing, having a metallographic structure with a content of ferrite of 35%-55%, and the coiled tubing has a higher content of an alloy element, and can meet requirements of an application in a high pressure, high CO2 and H2S corrosive environment. The product prepared has a high strength, and a good fatigue life, and the bending fatigue life thereof can reach 3-5 times that of a conventional CT90 coiled tubing.
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Inventors:
CHEN HUAHSUN (CN)
CAI XIAOJING (CN)
LIN XU (CN)
REN CHENGJUN (CN)
WANG TAI (CN)
XU CHANGFU (CN)
CAI XIAOJING (CN)
LIN XU (CN)
REN CHENGJUN (CN)
WANG TAI (CN)
XU CHANGFU (CN)
Application Number:
PCT/CN2018/095771
Publication Date:
February 20, 2020
Filing Date:
August 14, 2018
Export Citation:
Assignee:
JASON ENERGY TECH CO LTD (CN)
International Classes:
B21C37/08; B23K13/02; C22C38/18; C22C38/40
Domestic Patent References:
| WO2013191208A1 | 2013-12-27 |
Foreign References:
| CN105478524A | 2016-04-13 | |||
| CN108220782A | 2018-06-29 | |||
| CN1157768A | 1997-08-27 | |||
| CN108942097A | 2018-12-07 | |||
| CN105478525A | 2016-04-13 | |||
| CN102605284A | 2012-07-25 | |||
| EP2947169A1 | 2015-11-25 | |||
| CN102719767A | 2012-10-10 |
Attorney, Agent or Firm:
YANTAI BINGCHENG PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
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