超高强度CT110变壁厚连续管性能  

Performance of High Strength CT110 Tapered Coiled Tubing

作　　者：汪海涛 韩忍之[3] 刘云 温宝京 王维亮 WANG Haitao1,2, HAN Renzhi3, LIU Yun1,2 WEN Baojing1,2, WANG Weiliang1,2(1. Chinese National Engineering Research Center for Petroleum and Natural Gas Tubular Goods ,Baoji 721008 ,Sh（umxi, China;2. Research Institute of Steel Pipe ,Baoji Petroleum Steel Pipe Co. ,Ltd. ,Baoji 721008 ,Shannxi,China;3. Materials ＆ Equipment Department, China National Petroleum Co. ,Ltd. ,Beijing 100007, China)

机构地区：[1]国家石油天然气管材工程技术研究中心,陕西宝鸡721008 [2]宝鸡石油钢管有限责任公司钢管研究院,陕西宝鸡721008 [3]中国石油天然气集团有限公司物资装备部,北京100007

出　　处：《焊管》2018年第2期32-35,39,共5页Welded Pipe and Tube

基　　金：国家科技重大专项"大型油气田及煤层气开发"(项目编号2016ZX05023-006)

摘　　要：为了打破国外对超高强度CT110变壁厚连续管制造技术的垄断,研制开发了外径不变、壁厚沿长度方向均匀变化的超高强度CT110变壁厚连续管,并对该连续管柱进行了显微组织、强度、塑性、疲劳性能、抗压性能的试验检测。结果显示,开发的CT110变壁厚连续油管组织以铁素体+粒状贝氏体为主,管体和焊缝的组织性能基本一致,平均屈服强度为833 MPa,平均抗拉强度为870 MPa,硬度小于301HV0.5,挤毁强度为145.7 MPa,爆破压力为170.6 MPa,内压条件为34.47 MPa时,疲劳寿命达到230次以上。结果表明,国产CT110变壁厚连续油管各项性能均满足API SPEC 5ST标准要求,符合现场作业需求。In order to break the monopoly of manufacturing technology of a high strength CT110 tapered coiled tubing in foreign countries,the high strength CT110 tapered coiled tubing with constant outer diameter and gradual extension of wall thickness was developed,and the microstructure,intensity,plasticity,fatigue property and compressive property of the coiled tubing were tested.The results showed that the microstructure of the developed CT110 tapered coiled tubing mainly consisted of ferrite and granular bainite,structure properties of tube and weld were basically the same; the average yield strength was833 MPa,the average tensile strength was 870 MPa,the hardness was less than 301 HV0.5,the collapsing strength was 145.7 MPa,the burst pressure was 170.6 MPa,fatigue lives were over 230 times.Results indicated that all the performances of domestic CT110 tapered coiled tubing could meet API SPEC 5ST standard and application requirements.

关 键 词：CT110 连续管 变壁厚 强度 塑性 

分 类 号：TE931.2[石油与天然气工程—石油机械设备]