CAJ | 학술논문

微流量控制钻井技术具有能够探测早期微小溢流和漏失、精确控制井底压力的优势.该技术的核心部件是地面自动节流管汇,其节流敏捷度和准确度直接关系到能否实现微流量控制和其控制精度.为了打破国外对该技术的垄断,降低钻井成本,开发具有自主知识产权的微流量控制钻井技术,综合考虑节流流量与井筒压力分布的关系,基于流体动力学与自动控制理论,设计了一套适用于微流量控制钻井的地面自动节流管汇.现场试验证实其具有较好的自动节流控制功能,能在30 s 内实现井筒微流量控制,地面检测压力误差低于0.1 MPa.该节流管汇的设计与现场成功应用为微流量控制钻井技术在我国的推广和设备的国产化进行了积极探索.
미류량공제찬정기술구유능구탐측조기미소일류화루실、정학공제정저압력적우세.해기술적핵심부건시지면자동절류관회,기절류민첩도화준학도직접관계도능부실현미류량공제화기공제정도.위료타파국외대해기술적롱단,강저찬정성본,개발구유자주지식산권적미류량공제찬정기술,종합고필절류류량여정통압력분포적관계,기우류체동역학여자동공제이론,설계료일투괄용우미류량공제찬정적지면자동절류관회.현장시험증실기구유교호적자동절류공제공능,능재30 s 내실현정통미류량공제,지면검측압력오차저우0.1 MPa.해절류관회적설계여현장성공응용위미류량공제찬정기술재아국적추엄화설비적국산화진행료적겁탐색.
Micro Flux Control (MFC) drilling technology has advantages of detecting early small overflow and leakage and con-trolling the bottom hole pressure precisely. The core component in this technology is ground automatic throttle manifold, whose agility and accuracy is directly related to whether pressure control can be achieved and its accuracy. This technology has been widely used by several foreign companies, who do not sell relevant equipment and tools, but only provide technical service with extremely high price. To break the monopoly of foreign technology and to reduce drilling cost as well as to develop MFC drilling technology with independent intellectual property right, a set of ground automatic throttle manifold was designed by comprehensively considering the relationship between well bore pressure distributions and throttling flow capacity and based on fluid dynamics and automatic control theory, The field test confirmed that this set of equipment has an excellent function of automatic throttle control. The MFC of well bore can be achieved in 30 s and the pressure error is less than 0.1 MPa. Design and successful field application of this throttle manifold paved the way for the promoting of MFC drilling technology in China and equipment localization.