Pumping cable fishing gear and method

Abstract

The invention relates to a pumping cable fishing gear and method. The fishing gear includes a motor, a cable and a fishing tool, wherein the motor is connected with a driven pulley through a transmission belt and drives a roller and the cable wound on the roller to wind and unwind; the cable enters a drill stem through a T-union and is connected with the fishing tool; the roller is mounted in a box body and contacted with a central shaft in the box body through a ball bearing; central shaft fixing brackets are arranged at the two ends of the central shaft; and further, one end of the roller is matched with the driven gear, and the other end thereof is a roller stopping end provided with a brake ribbon, a movable core shaft, a brake handle and the like. During the use, the fishing gear is mounted, a slurry pump is started, drilling fluid is pumped from the upper end of the drill stem and impacts a cylindrical pipe column at the upper part of the fishing tool, and the dropping speed of the cable is controlled through pressing down and releasing back the brake handle; when a fishing spear collides with a wire-line coring tool or a measuring instrument and gets stuck, the slurry pump is shut down and the motor is started, and then, the tool or the instrument can be fished up by adjusting the rotating speed of the motor. The fishing gear is simple in structure and low and cheap in cost, and has simple use method and high popularization value.

Description

technical field [0001] The present invention relates to a pumping wired fishing device and method, in particular to a pumping wired fishing device and its application for fishing rope coring tools or measuring instruments in highly deviated wells or horizontal well drill strings The method belongs to equipment used in the fields of petroleum drilling and geological and mineral drilling. Background technique [0002] In geological exploration and development, it is often necessary to take out cores from deep underground for geological analysis. In order to improve the efficiency of coring, the rope coring method is usually used; at the same time, in order to improve the quality of hole formation, it is necessary to lower the measuring instrument into the bottom of the hole to measure the parameters of the wellbore trajectory . When drilling, the extraction of the downhole wireline coring tool and the measuring instrument is accomplished by lowering the corresponding fishing ...

AI Technical Summary

Problems solved by technology

At present, these fishing tools are mainly lowered to the bottom of the well by their own gravity, but in highly deviated wells or horizontal wells, the downward force generated by the fishing tool's own gravity is small or not. In addition, the fishing tool is attached to the inner wall of the drill string , resulting in greater frictional resistance, so that fishing tools cannot be lowered into the bottom of the well

Therefore, during the drilling process of highly deviated wells or horizontal wells, it is necessary to pull out the downhole wireline coring tool or measuring instrument, but the tripping and tripping will greatly increase the drilling time and cost, and increase the labor costs of workers at the same time. operating strength

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