无气喷涂MoS_(2)/Cu/C复合涂层对海上管柱螺纹抗粘扣性能的影响  

Effect of Airless Spray MoS_(2)/Cu/C Composite Coating on Buckle-resistant Performance of Offshore Pipe String Threads

作　　者：殷启帅 杨进[1] 李振坤 啜广山 沈国华 杨富贵 宋宇[1] YIN Qi-shuai;YANG Jin;LI Zhen-kun;CHUAI Guang-shan;SHEN Guo-hua;YANG Fu-gui;SONG Yu(China University of Petroleum(Beijing),Beijing 102249,China;Engineering Technology Branch of CNOOC Energy Development Co.,Ltd.,Tianjin 300452,China;CNOOC Enertech Equipment Technology Co.,Ltd.,Tianjin 300452,China;ZS Titanium Co.,Ltd.,Liaoning Dandong 118002,China)

机构地区：[1]中国石油大学(北京),北京102249 [2]中海油能源发展股份有限公司工程技术分公司,天津300452 [3]中海油能源发展装备技术有限公司,天津300452 [4]中世钛业有限公司,辽宁丹东118002

出　　处：《表面技术》2022年第5期24-31,共8页Surface Technology

基　　金：“十三五”国家科技重大专项(2017ZX05032-004);中海油能源发展装备技术有限公司项目(ZX2021ZCZBF5808);国家自然科学基金青年基金项目(52101340);海南省科技专项资助(ZDKJ2021026);博士后创新人才支持计划项目(BX2021372);博士后科学基金面上项目(2021M693495);中国石油大学(北京)科研基金项目(2462021BJRC008,2462022YXZZ001)。

摘　　要：目的采用无污染的无气喷涂表面处理工艺,制备MoS_(2)/Cu/C复合涂层,提高海上管柱螺纹抗粘扣性能。方法在MoS_(2)/C涂层中掺杂纳米级Cu粉末,采用无气喷涂+高温固化+喷砂处理工艺,制备MoS_(2)/Cu/C复合涂层。通过显微组织、硬度测定和摩擦试验,分别评价MoS_(2)/Cu/C复合涂层的微观组织、显微硬度和摩擦系数,并通过扫描电子显微镜对MoS_(2)/Cu/C复合涂层进行形貌分析。最后,在实物试样上进行上卸扣试验,测试其抗粘扣性能。结果无气喷涂+高温固化过程中,半熔融粉末经过多次叠加,沉积形成致密的结构,未见明显孔隙。对MoS_(2)/Cu/C复合涂层进行喷砂预处理,可明显提高涂层的均匀度,增加涂层的粘结强度。涂层与基体之间呈锯齿形紧密机械结合,喷砂无气喷涂前后,基体硬度未发生改变,未对金属基体造成不利影响。MoS_(2)/Cu/C复合涂层在螺纹表面结合形成光滑的保护膜,螺纹表面摩擦系数降低,上扣扭矩降低幅度为19%~23%。结论在MoS_(2)/C涂层中掺杂纳米级Cu粉末,形成MoS_(2)/Cu/C复合涂层,可有效降低螺纹表面的摩擦系数,同时不降低本体强度。采用无气喷涂+高温固化得到MoS_(2)/Cu/C复合涂层,可有效提高石油管螺纹的抗粘扣性能,在海上钻完井现场已取得成功应用,该技术具有极大的借鉴意义和推广价值。Threaded pipes deliver offshore oil or gas under high pressure.Thus,threaded connections must be gas or liquid tight in the severe offshore environment.Uneven force or deformation on the surface of the thread tooth will cause galling and even lead to thread failure.Galling is the key that affects the safety and life of the pipe strings and restricts the quality and efficiency of offshore drilling and well completions.In addition,environmental protection has become the primary concern in recent years.This paper aims to innovatively prepare MoS_(2)/Cu/C composite coatings using a non-polluting airless spray coating technology to improve the anti-galling performance of the threads of the offshore pipe strings.MoS_(2)/C coating is a well-known solid lubricant that can reduce drag.Further,nano-scale Cu powder has good thermal conductivity.The prepared MoS_(2)/Cu/C composite coatings provide a thin layer of heterogeneous composite materials with good thermal conductivity,and excellent friction reduction on the thread surface of the offshore pipe strings.The MoS_(2)/Cu/C composite coatings are prepared by doping MoS_(2)/C coating with nano-scale Cu powder and adopting airless spraying and high-temperature curing.Properties of the composite coatings,including microstructure,microhardness,and friction coefficient,are evaluated first.Then,the morphology of the prepared MoS_(2)/Cu/C composite coatings is analyzed by scanning electron microscopy.Finally,make-up and breakout tests are conducted on the pipe string samples with the prepared MoS_(2)/Cu/C composite coatings to test their anti-galling performance.As a result,the semi-molten powder is superimposed and deposited multiple times during airless spraying and high-temperature curing,forming a dense structure without apparent pores.Besides,sandblasting pretreatment of MoS_(2)/Cu/C composite coatings significantly improved the uniformity and adhesive strength of the coatings.Moreover,the coatings and the metal substrate are tightly combined in a zigzag shape.The hardness o

关 键 词：MoS_(2)/Cu/C 复合涂层 无气喷涂 螺纹 抗粘扣 管柱 油套管 海上钻完井 

分 类 号：TG115.58[金属学及工艺—物理冶金] TE921[金属学及工艺—金属学]