旋转导向钻井工具执行机构推靠力规律分析

ANALYSIS OF THE LATERAL FORCE RULE OF ACTUATING MECHANISM ON ROTARY STEERABLE DRILLING TOOL

通过对旋转导向钻井工具执行机构柱塞个数大于2时其导向力、扩径力的分析研究,提出了"柱塞角"、"富裕角"和"间歇角"的概念,得出了工具的"柱塞"个数、工作中最多同时起作用的"柱塞"个数和导向力、扩径力之间的一般规律,指出最多的有效作用"柱塞"个数最好为大于"柱塞"总数的一半的最小整数,进一步为旋转导向钻井工具导向力优化设计及执行机械结构优化提供了理论依据。

Through studying the guiding force and hole enlargement force of actuating mechanism on rotary steerable drilling tool with more than 2 pistons, some conceptions such as piston angle, margin angle, interim angle are put forward, and the general law is derived about piston number and maximum number of simultaneous actuating piston between steering force and hole enlargement force. The research result shows that the maximum number of simultaneous actuating piston is N/2(N means number of pistons).