没google到你说的那个,倒是这个有：Perf-Drill tool “The Perf-Drill perforation tunnel drilling tool drills a large I.D.perforation tunnel using a unique patented (Feb.2003) articulated drill string.The Perf-Drill mills a casing window,then drills clean,2 7/8-in diameter perforation tunnels as much as 30-ft (9 m) out from the well bore,exiting at an angle of 15° from the casing axis and building to horizontal within 20 feet”. 这是一个叫perf-drill品牌的专利钻孔机
