Brake anti-blocking screw drilling tool

Abstract

The invention discloses a brake anti-blocking screw drilling tool with long service life, comprising a well head double-stage filtering device, an upper brake anti-blocking device, a hydraulic motor assembly, a transmission shaft assembly and a lower brake anti-blocking device. The brake anti-blocking screw drilling tool has the advantages as follows: the double-stage filtering is adopted, therefore, the filtering is performed according to particle diameters of impurities, the impurities such as sand grains in different particle diameters can be effectively prevented from entering into the drilling tool through well liquid, the anti-blocking and anti-wearing effects are much better, the service life of the drilling tool is prolonged, the drilling tool is avoided being dismounted due to blocking and wearing, and the work efficiency is improved; when the well liquid passes through, a filter screen plays a role in filtering, and when a pump is stopped, a spring is returned and a valve core is closed so as to play a role in braking, therefore, the well liquid with sand grains can be prevented from flowing back into the drilling tool to cause the blocking of the drilling tool.

Description

technical field [0001] The invention relates to a power drilling tool for drilling and repairing wells. Background technique [0002] Petroleum resources are a non-renewable resource. With the increase in the potential of oil production efficiency control, drilling and workover operations in oilfields gradually extend to deeper and more complex geology. There are more and more inclined wells, horizontal wells and measure wells. Ordinary screw When drilling tools are used for drilling and workover operations in these complex wells, the circulating fluid contains impurities such as sand particles, which may easily cause drilling tool blockage. In addition, due to the high formation pressure, when the wellhead pump is stopped, the downhole fluid will pass through the drill bit water hole and bypass The valve overflow hole returns to the drilling tool, causing the drilling tool to be blocked, and even the drill pipe or tubing to flow up the well platform, resulting in damage to ...

AI Technical Summary

Problems solved by technology

[0002] Petroleum resources are a non-renewable resource. With the increase in the potential of oil production efficiency control, drilling and workover operations in oilfields gradually extend to deeper and more complex geology. There are more and more inclined wells, horizontal wells and measure wells. Ordinary screw When drilling tools are used for drilling and workover operations in these complex wells, the circulating fluid contains impurities such as sand particles, which may easily cause drilling tool blockage. In addition, due to the high formation pressure, when the wellhead pump is stopped, the downhole fluid will pass through the drill bit water hole and bypass The overflow hole of the valve returns to the drilling tool, causing the drilling tool to be blocked, and even the drill pipe or tubing to flow up the well platform, causing the drilling tool to be damaged and restarted, the operating cost increases, and the well platform is polluted

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