MR 6C型钻井隔水管维修改造技术研究  

Repair Technology of MR 6C Marine Drilling Riser

作　　者：罗强 周国林[3] 樊春明 王洪川[2] 陈才虎 张彩莹 王耀锋 LUO Qiang;ZHOU Guolin;FAN Chunming;WANG Hongchuan;CHEN Caihu;ZHANG Caiying;WANG Yaofeng(National Engineering Research Center for Oil & Gas Drilling Equipment,Baoji 721002,China;Baoji Oilfield Machinery Co.,Ltd. ,Baoji 721002,China;China Oilfield Services Limited,Langfang 065201,China)

机构地区：[1]国家油气钻井装备工程技术研究中心,陕西宝鸡721002 [2]宝鸡石油机械有限责任公司,陕西宝鸡721002 [3]中海油田服务股份有限公司,河北廊坊065201

出　　处：《石油矿场机械》2020年第3期82-85,共4页Oil Field Equipment

基　　金：国家高技术研究发展计划(863计划)“深水钻井隔水管系统工程化研制”(2013AA09A222);工业和信息化部“第七代超深水钻井平台(船)创新专项”(工信部联装〔2016〕24号)。

摘　　要：某平台配置的MR 6C型钻井隔水管单根已服役多年,存在主管管体壁厚不足、隔水管单根间连接互换性差等问题,需进行维修升级改造。经检测评估,改造时重新利用了原有旧隔水管主管接头,切割更换了壁厚不足的主管管体。针对大直径异种壁厚的主管接头与主管管体间的组焊,制定了特殊的焊接工艺。以节流压井管线长度确定实际更换的每根主管管体长度,改造了10根老旧MR 6C型钻井隔水管单根。静水压试验表明维修改造后的MR 6C型隔水管单根满足高压密封和互换性等应用要求。One MR 6C drilling riser for a semi-submersible drilling platform have been used for many years and there are problems such as insufficient wall thickness of the main pipe body and poor connection interchangeability between the riser pipes.Maintenance and upgrade were required.After inspect and evaluation,the reconstruction reused the original old riser main pipe joint,and the main pipe body with insufficient wall thickness was cut and replaced.A special welding process has been developed for the group welding between large diameter heterogeneous wall thickness main pipe joints and main pipe bodies.The actual replaced length of every main pipe was determined by the length of choke&kills line.Hydrostatic test proved the repaired MR 6C drilling risers meet high pressure and interchangeability requirements.

关 键 词：钻井隔水管 维修改造 焊接 

分 类 号：TE951[石油与天然气工程—石油机械设备]