China National Petroleum Corporation ;CNPC Drilling Research Institute
发明人:
ZHANG Yanping,LI Xuehui,WU Qianli,YU Yongliang,CAO Chuan,LV Mingjie,JIA Tao,YANG Yi
申请号：
US201615363699
公开号：
US2017152718(A1)
申请日:
2016.11.29
申请国别(地区):
美国
年份:
2017
代理人:
摘要：
The present disclosure provides a casing windowing method and tool using coiled tubing; the windowing method comprises the steps of: a) preparing a borehole, including drifting a casing, and scraping an inner wall of the casing; b) hanging a positioning assembly in the casing, including seating the positioning assembly at a wellhead of the borehole, and after the positioning assembly is put down to a predetermined position in the casing, hanging a hanger of the positioning assembly at the inner wall of the casing; c) fixing a whipstock at a down-hole of the borehole, including seating the whipstock at the wellhead, and inserting a guiding assembly of the whipstock into the hanger so that an orientation of a window inclined plane of the guiding assembly meets a requirement of window orientation; and d) windowing the casing, including seating a tapered windowing mill at the wellhead, and after the tapered windowing mill is put down to the window inclined plane of the guiding assembly, starting the tapered windo
