Continuous oil pipe-based guide high-pressure jet drilling system
A high-pressure injection and tubing technology, applied in the field of oil well drilling, can solve the problems of lack of engineering and geological monitoring instruments, inability to grasp bottom hole information in time, poor controllability of wellbore trajectory, etc., achieve good geosteering function, improve drilling speed and The effect of bit life, improved wellbore length and wellbore trajectory accuracy
Inactive Publication Date: 2012-11-14
CNPC GREATWALL DRILLING ENG
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Problems solved by technology
Overcome the lack of effective directional tools or simple directional methods in existing drilling systems, poor controllability of wellbore trajectory; lack of engineering and geological monitoring instruments, and bottom-hole information cannot be grasped in time
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[0008] As shown in the attached figure, a steerable high-pressure jet drilling system based on coiled tubing consists of two parts: the ground system and the downhole drilling tool assembly; the ground system consists of a coiled tubing machine, a ground power supply system, a high-pressure pump and a high-pressure manifold; The downhole drilling tool assembly consists of coiled tubing 1, cable 2, connecting joint 3, drill collar 4, steering device 5, electric motor device 6, orientation device 7 and high-pressure jet drill bit 8; coiled tubing 1, connecting joint 3, drill collar 4 , guiding device 5, electric motor device 6, orienting device 7 and high-pressure jet drill bit 8 are connected sequentially; machine to achieve. The cable 2 is built in the coiled tubing 1 and is lowered or lifted synchronously with it to transmit communication signals and power provided by the ground power system. The cable 2 realizes the real-time transmission of downhole information such as dri...
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The invention relates to the technical field of oil (gas, water) well drilling, in particular to a continuous oil pipe-based high-pressure jet drilling system with guiding function. A continuous oil pipe, a connecting joint, a drill collar, a guide device, an electric motor device, an orienting device and a high-pressure jet drill of a down-hole drilling assembly of the system are connected in turn; a cable is embedded inside the continuous oil pipe; an engineering and geologic parameter measuring instrument is arranged in the guide device; the electric motor device consists of a high-power motor, a speed reducer and a lubricant compensating device; a torque sensor, a temperature sensor and the like are arranged in the motor; the orienting device consists of a driving hydraulic cylinder, a rotary guide wing and an orientated measuring and controlling system; the lower part and the side face of the high-pressure jet drill are provided with cutting blade wings; a polycrystalline diamondand a YD alloy are embedded on the cutting blade wings; and a plurality of wear-resistant high-pressure nozzles are spirally distributed on the lower part of the high-pressure jet drill. The drillingsystem has guiding function, down-hole information is known in time, accurate traction control is realized and the aim of drilling efficiently is fulfilled.
Description
Technical field: [0001] The invention relates to the technical field of oil (gas, water) well drilling, in particular to a coiled tubing-based high-pressure jet drilling system with guiding function. Background technique: [0002] Conventional high-pressure jet drilling technology is mainly based on the existing drilling equipment to increase the pumping pressure of drilling mud. The mechanical cutting of the drill bit is the main method, and the hydraulic jet rock breaking is supplemented by the working method to realize the drilling of the drill bit to the rock. Although this technology improves the drilling efficiency to a certain extent, the speed-up effect is not very obvious. Another popular short-radius or radial high-pressure water jet drilling technology mostly uses high-pressure hoses to transport high-pressure liquid, and only relies on hydraulic jet rock breaking to achieve rock formation drilling. The borehole diameter formed by this drilling method is often sm...
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IPC IPC(8): E21B7/18E21B3/00E21B7/06E21B47/12E21B10/55E21B4/04
Inventor 邓旭余雷喻晨吴兴国李敏李敬东尚宪飞苏涛孙红玉匡绪兵高扬王成业刘青云唐亮徐肇国马勇孙少亮
Owner CNPC GREATWALL DRILLING ENG