摘要
粘吸、沉砂卡钻是常见和频发的卡钻事故,发生此类事故的主要原因是停止循环或钻井液静止后,钻具紧贴井壁失却钻井液润滑,且液柱横向正压将钻具挤向井壁压紧,导致钻具紧贴井壁与泥饼粘合,同时岩屑下沉将井下钻具包裹堵塞。利用循环密封三通技术、SIT功能合并和高压冲管的旋转原理,研制出一套在井口能够旋转循环防卡装置,用于吐哈、三塘湖等油气田的29口井,在钻井提升系统、旋转系统或钻井液循环系统发生故障时,将旋转循环防卡装置安装后,实现转动钻具及独立循环的功能,解决了钻井现场因钻井提升系统、旋转系统或钻井液循环系统发生故障而无法有效预防粘吸、沉砂卡钻事故的难题,从而为优快钻井及安全钻井提供了技术保障。
Adhesive suction and sand settling are the common and frequent accidents for drill pipe sticking.The main reason for such accidents is that after the circulation is stopped or the drilling fluid is static,the drill tools are close to the borehole wall and lost the drilling fluid lubrication,and the horizontal positive pressure of the liquid column squeezes the drill tools to the borehole wall and compresses them tightly,resulting in the drill tools to tightly adhere to the borehole wall and bond with the mud cake.At the same time,the cuttings sinks,wrapping and plugging the down-hole drilling tools.A set of anti-sticking device with rotating circulation at the wellhead was developed by using the three-way technology of cycle seal,SIT function merging and rotation principle of high pressure washing pipe,which was used in 29 wells of Tuha,Santanghu and other oil and gas fields.When the drilling lifting system,rotating system or drilling fluid circulation system fails,the rotating circulation anti-sticking device is installed to realize the function of rotating drill tools and independent circulation,solving the problem of ineffective prevention of drill pipe sticking accidents of adhesive suction and sand settling caused by drilling lifting system,rotating system or drilling fluid circulation system failures in drilling sites.It provides technical support for optimal fast drilling and safe drilling.
作者
张耀先
李开荣
张创科
万军
张强
刘玉白
ZHANG Yaoxian;LI Kairong;ZHANG Chuangke;WAN Jun;ZHANG Qiang;LIU Yubai(XDEC Tuha Drilling Company of CNPC,Turpan,Xinjiang 838200,China;XDEC Geological Research Institute(Logging Engineering Branch)of CNPC,Karamay,Xinjiang 834000,China)
出处
《录井工程》
2024年第4期14-19,共6页
Mud Logging Engineering
关键词
卡钻
循环
旋转
防卡
钻具转动
循环密封三通
drill pipe sticking
circulation
rotation
anti-sticking
drilling tool rotation
cycle seal three-way
