Hydraulic-driven automatic bit feeding control system with constant bit pressure
A technology of automatic drilling and control system, which is applied to the automatic control system of drilling, drilling equipment, earthwork drilling and production, etc.
Active Publication Date: 2014-05-28
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0002] The automatic drilling technology has been maturely applied in drilling engineering, but the hydraulically driven constant drilling pressure automatic drilling technology is still blank in China
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[0008] As shown in the attached figure, a hydraulically driven constant pressure-on-bit automatic drilling control system includes a load-sensing variable pump 1, a cartridge relief valve I2, a cartridge relief valve I6, a cartridge relief valve II7 and a cartridge Install the pressure reducing valve Ⅱ9; the suction port of the load sensing variable pump 1 is connected with the oil tank, and the outlet is respectively connected to the A port of the cartridge pressure reducing valve Ⅰ2 and the B port of the cartridge pressure reducing valve Ⅱ9, and the B port of the cartridge pressure reducing valve Ⅰ2 The port is connected with the oil port of the lower cavity of the oil cylinder, and is connected with the inlet A of the cartridge relief valve I6 at the same time, the outlet B of the cartridge relief valve I6 is connected with the oil tank, and the control port X of the cartridge relief valve I6 is connected with the pressure valve 4 The inlet of the pressure valve 4 is connect...
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The invention relates to the technical field of hydraulic control, in particular to a hydraulic-driven automatic bit feeding control system with a constant bit pressure, of an automatic drilling machine. A suction inlet of a load-sensing variable pump of the system is connected with an oil tank, an outlet of the load-sensing variable pump is respectively connected with an opening A of a plug-in reducing valve I and an opening B of a plug-in reducing valve II, the opening B of the plug-in reducing valve I is connected with a lower cavity oil port of an oil cylinder and is simultaneously connected with an inlet A of a plug-in overflow valve I, an outlet B of the plug-in overflow valve I is connected with the oil tank, a control opening X of the plug-in overflow valve I is connected with an inlet of a pressure valve, an outlet of the pressure valve is connected with an inlet of a direct-acting overflow valve I, a control opening of a shuttle valve and an opening T of the plug-in reducing valve I, the outlet of the direct-acting overflow valve is connected with the oil tank, and the opening A and the control opening X of the plug-in overflow valve I are connected through a damping hole. The hydraulic-driven automatic bit feeding control system with the constant bit pressure disclosed by the invention realizes a top-drive automatic bit feeding function with the constant bit pressure in a well drilling process.
Description
Technical field: [0001] The invention relates to the technical field of hydraulic control, in particular to a hydraulically driven constant drilling pressure automatic drilling control system for an automatic drilling rig. Background technique: [0002] The automatic drilling technology has been maturely applied in drilling engineering, but the hydraulically driven constant drilling pressure automatic drilling technology is still blank in China. Invention content: [0003] The technical problem to be solved by the present invention is to provide a hydraulically driven constant pressure-on-bit automatic drill feeding control system, which realizes the function of automatic drill feeding at constant pressure on top drive during drilling. [0004] The technical solution adopted by the present invention is: a hydraulically driven constant drilling pressure automatic drilling control system, including a load sensing variable pump, a cartridge pressure reducing valve I, a cartri...
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IPC IPC(8): E21B44/06
Inventor 王鑫张延忠袁祖振朱兴张珣王国军乔环郑勇谭
Owner BC P INC CHINA NAT PETROLEUM CORP