Continuous directional coring and deflecting machine tool with dual tubes for outer guiding and inner drilling and deflecting method thereof
A machine tool, directional device technology, applied in drilling equipment and methods, directional drilling, drill pipe and other directions, can solve the problems of directional drilling and deflecting technology that cannot be continuously cored
Active Publication Date: 2011-06-01
POWERCHINA ZHONGNAN ENG +1
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[0005] Aiming at the technical problem that the existing directional drilling and deflection building tools cannot realize continuous coring and deflection building, the present invention aims to provide a double-pipe outer guide and inner drilling directional continuous coring and deflection building tool and its deflection building method, which can be used When the deflection tool is drilling in the deflection section of directional drilling, the outer tube is used for guiding, and the inner tube is used for coring. The directional and continuous coring and deflection drilling can be realized through the directional deflection of the outer tube, which can better solve the problem of current directional drilling. The technical problem that the drilling deflection process cannot continuously take cores
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[0039] A double-pipe outer-guiding inner-drilling directional continuous coring tool, as shown in Figure 1(a) and Figure 1(b), includes an outer pipe 30, which is connected to a guide pipe shoe 32; The inner pipe 29 is sleeved in the pipe 30, and the inner pipe 29 is connected to the hydraulic pressure directional device 40 in the hole, and the lower end of the hydraulic pressure directional device 40 in the hole communicates with the upper end of an elastic joint 50 through an intermediate joint 2; The upper end of the water pressure directional device 40 in the hole is connected with a hollow water connection 1, and the other end of the water connection 1 is connected with a drill pipe; the lower end of the elastic joint 50 is connected with a male joint 36, and the lower end of the male joint 36 is connected with the A core tube 33 is connected, and the lower end of the core tube 33 is connected with a diamond drill bit 35 through a snap spring 34 ; a positioning keyway 31 i...
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The invention discloses a continuous directional coring and deflecting machine tool with dual tubes for outer guiding and inner drilling and a deflecting method thereof, which belong to the technical field of continuous directional coring and deflecting. During the drilling in a directional drilling and deflecting segment, a drilling tool group special for continuous directional coring, deflecting and drilling is adopted, and the continuous directional coring, deflecting and drilling is performed by an inner tube coring drilling tool through the directional guiding deflection of an outer tube. The invention well solves the technical difficulty that the traditional domestic directional drilling and deflecting technique cannot perform coring, and provides a utility device and a deflecting method thereof for achieving the full-bore coring during the directional drilling in hydropower investigation projects. Meanwhile, the invention provides a reference for the directional drilling requiring continuous coring and deflecting in other industries of China.
Description
technical field [0001] The present invention relates to the field of directional continuous coring and deflection building, in particular to a double-pipe outer guide and inner drilling directional continuous coring deflection tool and its deflection method, which is mainly suitable for directional drilling continuous coring and deflection building in hydropower survey projects . Background technique [0002] Directional drilling technology has been widely used in my country's petroleum, coal, mining, municipal and other industries. Directional drilling is a technology that drills along the design trajectory according to certain purpose requirements. Directional drilling technology originated in the early 20th century. With the application of the three major international drilling technologies (MWD measurement while drilling technology, high-efficiency PDC bit, and long-life steerable screw drilling tool), directional drilling technology has developed rapidly. In my coun...
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IPC IPC(8): E21B7/06E21B7/08E21B7/28E21B25/16E21B17/00E21B17/046E21B47/02
Inventor 陈安重
Owner POWERCHINA ZHONGNAN ENG
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