关于高压高产井钻井双四通安装位置的探讨  

Discussion on Installation Position of Double Spools in Drilling of High-pressure and High-production Wells

作　　者：胡大梁[1,2] 王文刚 朱化蜀[1] 肖国益[1] Hu Daliang;Wang Wengang;Zhu Huashu;Xiao Guoyi(Research Institute of Petroleum Engineering Technology,Sinopec Southwest Oil&Gas Company,Deyang,Sichuan 618000,China;Petroleum Engineering Technology Service Co.,Ltd.,Sinopec,Beijing 100020,China)

机构地区：[1]中国石化西南油气分公司石油工程技术研究院,四川德阳618000 [2]中国石化石油工程技术服务有限公司,北京100020

出　　处：《石油工业技术监督》2022年第3期1-5,共5页Technology Supervision in Petroleum Industry

摘　　要：目前的井控标准规定压力等级为70 MPa和105 MPa,井口装置组合包括单四通和双四通两种方式,但未明确双四通的具体安装位置。双四通中间安装一套半封闸板,若关闭半封闸板,则只能使用下四通的两条通道放喷,高压高产条件下难以满足放喷需求。双四通串联安装,可以根据井口压力确定开启放喷通道的数量,紧急情况下可同时使用双四通的4条通道放喷,有利于降低井口压力。因此,对于新区域的超深高压探井,在使用复合钻杆条件下,建议采用双四通串联安装的方式,有利于保障井口安全。In the current well control standard, it is stipulated that the pressure levels are 70 MPa and 105 MPa. The wellhead device includes two kinds of single spool and double spools, but the specific installation position of the double spools is not stipulated. A set of half-closed ram preventer is installed between the double spools. If the half-closed ram preventer is closed, only two channels of the lower spool can be used for blowout, which is difficult to meet the blowout demand under the condition of high pressure and high yield.It the double spools are installed in series, the number of blowout channels can be determined according to the wellhead pressure. In case of emergency, the four channels of double spools can be used for blowout at the same time, which is conducive to reducing the wellhead pressure. Therefore, for the ultra-deep high-pressure exploration wells in the new area, it is recommended to adopt the series installation mode of double spools under the condition of using composite drill pipe, which is conducive to ensuring the wellhead safety.

关 键 词：井控 钻井四通 闸板防喷器 高压高产井 井喷 

分 类 号：TE28[石油与天然气工程—油气井工程]