用传统造斜器进行开窗的窗口形状类似“倒水滴”形 ,窗口全宽部分的比例小 ,影响了后续钻井工具和完井工具的下入。例如 ,7in套管的窗口长为 10ft,而窗口全宽部分的长度仅为 2ft。本文叙述了一种特殊结构的造斜器和开窗工具 ,其开出的窗口全宽部分的长度与窗口总长的比例可达85 % ,为后续钻井工具和完井工具的下入提供了足够的空间。试验表明 :7in套管的窗口长为 9 8ft时 ,采用该技术所达到的窗口全宽部分的长度为 7 5ft (窗口宽 6 0 0in) ;9 in套管的窗口长为 16 83ft时 ,采用该技术所达到的窗口全宽部分的长度为 14 5 0ft (窗口宽 8 5 0in)。该造斜器可以方便地调整以改变窗口全宽部分的长度 ,并且在开窗时不必钻鼠洞。加长窗口全宽部分的长度有以下优点 :①顺利地通过窗口下入钻井工具和完井工具 ;②对短半径水平井的侧钻非常理想 ;③在硬地层侧钻时不必钻鼠洞 ;④可以对窗口深度的计算误差进行弥补 ;⑤窗口形状对称平整。本文详细叙述了该造斜器和开窗工具的试验、试验结果、窗口形状 ,并对现场试验结果进行了总结 The window opened by the traditional whipstock has the shape of “pouring drop”, and the proportion of the full-width part of the window is small, which affects the subsequent drilling tools and completion tools. For example, a 7in sleeve has a window length of 10ft and a full width portion of the window is only 2ft. This paper describes a special structure of whipstocking and windowing tools, the length of the full-width part of the opening window and the total length of the window up to 85% of the follow-up drilling tools and completion tools provided sufficient Space. Experiments show that when the window length of a 7in sleeve is 9 8ft, the total width of the window reached by this technique is 75ft (the width of the window is 600mm); when the length of the 9in sleeve is 1683ft, The full-width portion of the window reached by this technique is 145 ft (850 in window width). The whipstock can be easily adjusted to change the length of the full-width portion of the window without the need to drill a hole in the window. Lengthening the length of the full-width portion of the window has the following advantages: ① Smoothly drilling tools and completion tools through the window; ② Side-drills for short-radius horizontal wells are ideal; ③ There is no need to drill holes in side-drills; ④ Can make up for the calculation error of the window depth; ⑤The shape of the window is symmetrical and flat. This article describes in detail the whipstocking and windowing tools of the test, test results, window shape, and field test results were summarized