定向钻探新型双滑块连续造斜器研究与应用

Research and Application of New Double-slider Continuous Whipstock in Directional Drilling

机械式连续造斜器是定向钻探技术手段之一,目前常用的LZ型连续造斜器采用单滑块与孔壁支撑,径向制动扭矩小,造斜过程中容易发生角位移,影响造斜效果,并且造斜强度不易调节。为解决造斜稳定性问题,特别设计研制了一种新型双滑块连续造斜器,该造斜器卡固稳定,造斜强度可调,器具经过野外试验验证工作可靠。新型连续造斜器的创新点在于:(1)采用双滑块结构形式,在国内还没有先例,已经取得实用新型专利;(2)增加了造斜强度调节机构,可根据施工需要调节;(3)通过工作弹簧与上滑块组件之间的螺纹连接方式来实现上滑块回位;(4)采用分压接头控制上滑块侧向力,在满足卡固要求情况下,降低造斜钻进阻力。新型双滑块连续造斜器为国内外首创,具有自主知识产权,使用效果良好,具备较好的开发推广前景。

Mechanical continuous whipstock is one of the directional drilling techniques. Nowadays, single-slider and hole wall support are used for commonly-used LZ continuous whipstock with small radial braking torque, the angular displacement is easy to occur in the whipstocking process, which affects the whipstocking effect, and the slanting angle adjustment is not easy to operate. In order to solve the slanting stability, a new type of double-slider continuous whipstock is specially designed and developed, which is stably clamped and the slanting angle can be adjusted, the device reliability is verified by field test. The innovative features of this new continuous whipstock are： （1） double-slider structure, there is no precedent in China, has been approved utility model patent; （2） The slanting adjustment mechanism is added, which can be adjusted according to the construction requirements;（3） The upper slider is returned back by means of the threaded connection between the work spring and the upper slider assembly; （4） the lateral force of the upper slider is controlled by a pressure-division joint, which reduces the slanting drilling resistance when the clamping requirements are met. This new type of double-slider continuous whipstock is the initiate both in China and abroad with independent intellectual property rights, which has good application effect and good prospects of development and popularization.