Pumping cable fishing gear and method

A fishing device and pumping technology, which is applied to the equipment used in the field of geological and mineral drilling, and in the field of oil drilling, can solve the problems that fishing tools cannot be lowered into the bottom of the well, increase drilling time and cost, and increase the intensity of workers' operations. Achieve good promotion and application value, reduce drilling time and cost, and simple structure

Inactive Publication Date: 2012-09-19
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Pumping cable fishing gear and method
  • Pumping cable fishing gear and method
  • Pumping cable fishing gear and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: A kind of pumping wired salvage device of the present invention, its overall structure and installation state are as follows figure 1 As shown, it includes motor 8, cable 13 and fishing tool 14, and is also provided with cable box, central shaft 18, drum 22, connecting pipe 3, tee joint 2, cable centering pulley block 5 and guide pulley 11; 8 select a stepless variable speed motor, the motor is connected to the driven wheel 10 installed at the end of the drum 22 through the transmission belt 9, the driven wheel drives the drum 22 in the cable box box 7 to rotate, and the rotation of the drum 22 drives the cable 13 wound on the drum. Rewinding; one end of the cable is wound on the drum 22, the cable enters the upper drill string 15 through the cable outlet 4, the cable centered pulley block 5, the connecting pipe 3, the tee joint 2, and the guide pulley 11, and the cable is centered The pulley block 5 ensures that the cable 13 remains centered at the cable ...

Embodiment 2

[0033] Embodiment 2: A kind of pumping wired fishing device, its overall structure is the same as embodiment 1, the difference is that the middle part of the case cover is provided with the see-through window 32 that organic glass is made.

Embodiment 3

[0034] Embodiment 3: Use the pumping cable salvage device of embodiment 1 of the present invention to salvage the method for surveying instrument 16 in high-inclination drilling, operate according to the following steps:

[0035] (1) During the drilling process of high-inclination drilling, the drill string 15 is supported by the derrick 1, the drill string is inside the well wall 12, the end of the drill string is the drill bit 17, and the measuring instrument 16 is installed behind the drill bit 17, which needs to be pumped Before the wired fishing device, stop the drilling activities, and install the pumping wired fishing device as required;

[0036] (2) Pull out the cable 13 on the drum 22 in the box 7 from the cable lead-out end 4, pass the cable through the center pulley block 5, pass through the connecting pipe 3, the tee joint 2, and then pass through the guide pulley 11 and the fishing tool 14 connected;

[0037] (3) Connect the tee joint 2 into the drill string 15, ...

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PUM

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B31/00
Inventor 邵春陈鹏飞褚志伟石奎李田军
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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