石油钻井设备与工具-连续油管钻井技术46.ppt

连续油管钻井技术 二、连续油管系统简介 装备的组成： 油管滚筒 动力装置 油管注入装置 控制室 井控装置 油管滚筒 Transport pipe Store pipe Continuous gas/fluid pumping Maintain pipe tension 动力装置 - Hydraulics Conventional units hydraulic powered 2 systems - static and dynamic BOP and stripper use static pressure and accumulator Injector and reel require pressure and flowrate Small electric units exist Future designs electric or electric over hydraulic 连续油管注入头 Coiled tubing injector head 注入装置的类型 CT Stuffing Box Dynamic seal around coiled tubing Compressed to seal by well pressure and hydraulic pressure to seal Self lubricating polymers Change while CT in wellbore Intended to wear be replaced 控制室 Coiled Tubing Evolution CT Size Issues Pump / Circulation Rates Annular Flow Friction Force Conditions Fatigue Life Cost Main components Pumping / displacing Create under-balance Create over-balance (kill) Circulate Flush ….. Acid Stimulation Well bore flush Perforation flush Perforation squeeze Accurate fluid placement Avoid bullheading well fluid Minimize completion corrosion Minimize iron contamination ….. Cementing Balanced plug Abandonment Zonal isolation Perforation squeeze Cement whipstock ….. Fishing Gas lift Perforating Stiff Wire Line (SWL) High angle wells for real time logging (PLT) Depth correlation Perforating Treatment monitoring DUCT directional Memory logging….? Jetting Underreaming cutting APR RIH Job Type From Jan 1999 to Sept 2001 Fluid velocity + Particle terminal velocity = Lift velocity Clean out - vertical RIH to top of fill Pump fluid at high rates Wash into fill Displace fill out of well Pump rate / velocity critical Clean out – high angle Push Pull Hammer up or down Mill Circulate fluids Video, photograph ….. Create under-balance Initiate natural flow Differential stuck pipe Evacuate fluid ….. Nitrogen Underbalance Deployment systems Firing systems Extreme lengths and weights ….. Standard Vortex RotoJet Tornado ….. 连续油管亦称挠性油管、盘管。连续油管钻井技术是90年代国 外大力研究和发展的热门钻井技术之一。1991年，ELF公司首次使用新研制的连续油管在巴黎盆地