A wireline coring screw drilling tool for horizontal directional drilling engineering geological survey

Abstract

A cable coring screw drilling tool for horizontal directional drilling engineering geological survey. The bypass valve of the drilling tool provides mud flow into the motor assembly, and a certain pressure difference is formed at the inlet and outlet of the motor assembly to push the motor assembly. The rotor is deflected at a certain angle around the axis of the stator to rotate, so that the rotational speed and torque are transmitted to the drill bit through the cardan shaft and the drive shaft, thus avoiding the existing drilling tools that are produced by the drilling rod to provide the drilling pressure and torque required by the drill bit Correct the deviation and control the direction of the drilling tool, thereby greatly increasing the survey efficiency; at the same time, the rotor is hollow inside, and can be used in conjunction with the wireline core drilling tool to realize the functional integration of horizontal directional screw drilling and wireline coring; the inner diameter of the rotor and the wireline The outer diameter interval of the core drilling tool assembly, the rope core drilling tool assembly cannot produce rotational displacement around the stator, thereby avoiding the phenomenon of falling off, breaking and impacting the internal parts of the rope core drilling tool, and increasing the rope core drilling The service life of the drilling tool.

Description

technical field [0001] The invention relates to a cable coring screw drilling tool for horizontal directional drilling engineering geological survey and belongs to the field of engineering geological survey equipment. Background technique [0002] Wireline core drilling tool is a drilling tool that does not lift the core, that is, during the drilling process, when the core tube is full or the core is blocked, it is not necessary to lift all the drill strings in the hole to the surface, but by means of The special fishing tool fishes the inner core tube out of the drill string with wire rope and lifts the entire drill pipe only when the drill bit is worn out and needs to be inspected or replaced. [0003] The wireline coring tool in the existing vertical drilling and coring technology consists of a drill pipe, a wireline coring assembly and a drill bit, wherein the wireline coring assembly is installed inside the drill pipe, and the drill bit is installed in the drill pipe. ...

AI Technical Summary

Problems solved by technology

[0003] The wireline coring tool in the existing vertical drilling and coring technology consists of a drill pipe, a wireline coring assembly and a drill bit, wherein the wireline coring assembly is installed inside the drill pipe, and the drill bit is installed in the drill pipe. At the end, the mode of "down coring tube-coring-trajectory measurement-controlling deviation correction-bottom coring tube" is adopted for drilling and coring, guiding, and direction-controlling separation, although the efficiency of this method is higher than that of traditional drilling and coring technology, but the drilling tool provides the drilling pressure and torque required by the drill bit by the drill pipe, but it needs to correct the deviation and control the drilling tool, which greatly reduces the survey efficiency, and the workload of horizontal drilling survey is larger than that of vertical drilling survey , so the drilling tool cannot meet the technical requirements of horizontal directional drilling engineering geological survey

At the same time, the rope core drilling tool of the drilling tool will rotate with the drill pipe, causing the internal parts of the rope core drilling tool to fall off, break and hit, which will affect the service life of the rope core drilling tool

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