CAJ | 학술논문

针对双层套管开窗侧钻井分叉难度大、开窗效率低、常规工具不适应等现状，研制了新型高效快速分叉导向式开窗工具；采用硬对硬设计理念，实施双角度超硬复合斜面导向、双切削刃强侧切开窗钻头和三缸联动加压非循环坐封新技术；在切削过程中，大大降低了导斜体的损伤程度，增强了非对称性、非稳定性和形态随机性所形成的断续切削工况的适应性和可靠性，有效地提高了分叉角，在文25侧61井应用获得成功。同时，对该双层套管井窗口形成机理进行了现场跟踪调研和静动态仿真，在此基础上进一步阐述了实现双层套管高效侧钻的技术途径，并对侧钻市场的后续发展有着重要的借鉴意义。
침대쌍층투관개창측찬정분차난도대、개창효솔저、상규공구불괄응등현상，연제료신형고효쾌속분차도향식개창공구；채용경대경설계이념，실시쌍각도초경복합사면도향、쌍절삭인강측절개창찬두화삼항련동가압비순배좌봉신기술；재절삭과정중，대대강저료도사체적손상정도，증강료비대칭성、비은정성화형태수궤성소형성적단속절삭공황적괄응성화가고성，유효지제고료분차각，재문25측61정응용획득성공。동시，대해쌍층투관정창구형성궤리진행료현장근종조연화정동태방진，재차기출상진일보천술료실현쌍층투관고효측찬적기술도경，병대측찬시장적후속발전유착중요적차감의의。
Aiming to solve problems like difficulty in low efficiency in opening the window and ill adaptability of conventional sidetracking tools,we developed a new type of fast and efficient bifurcation and pilot type sidetracking tools,using“hard to hard”design idea,an implementing new technologies of dual-angle superhard compound bevel guide,double cutting edge and strong lateral cutting ability of sidetracking bit,and triplex-cylinder linkage pressurized and non-cyclical packer. In the cutting process,greatly reduced the extent of damage to whipstock,enhanced the adaptability and reliability of intermittent cutting conditions caused by the asymmetry,non-stability and the form-randomness,effectively improved the bifurcation angle,and applied it to be successful in the Wen25Ce61 well. At the same time,the window formation mechanism of the dual cased hole was done,and static and dynamic simulation were made. On this basis,further we elaborated technical methods to achieve efficient dual casing sidetrack. This research is hoped to have great significance to the future development of the sidetrack market.