论文部分内容阅读
为了使连续循环系统(CCS)的操作更方便、机械性能更可靠,进行了样机试验,试验中对系统的机械和控制系统进行了改善和提高。该系统引入到钻井作业中可提高专用设备的可靠性和适用性。连续循环系统的使用能大大地改变钻井作业商在一些难钻地层的作业方式,当钻遇破裂压力和孔隙压力梯度差很小的地层时,接单根时保持连续循环是相当有利的。连续循环能维持稳定的当量循环密度,在正常钻井过程中可以避免接单根引起的正负压力激动,改善井眼的清洁效果,避免井涌的发生。
In order to make the operation of continuous circulation system (CCS) more convenient and the mechanical performance more reliable, the prototype test was carried out. The mechanical and control system of the system was improved and improved in the experiment. The introduction of this system into drilling operations enhances the reliability and suitability of specialized equipment. The use of a continuous circulation system can significantly change the way a drilling operator works in some difficult formations. When drilling a formation with a small difference in fracture pressure and pore pressure gradient, it is quite advantageous to keep a continuous cycle of a single root. Continuous circulation can maintain a stable equivalent cycle density, in the normal drilling process can be avoided by a single root cause positive and negative pressure to stimulate the wellbore to improve the cleaning effect and avoid the occurrence of kick.