Oil well electric spark de-blocking joint-forming robot

Abstract

The invention relates to an oil well electric spark caulking and crack making robot, and belongs to the technology field of the robot. The invention mainly comprises a ground cable automatic feeding system, a guide pulley, a cable, a force sensor, an upper selfadaptive supporting mechanism, a gun perforation eddy current testing device, an electrode feeding device, a tapered bearing connector, a lower selfadaptive supporting mechanism and a counter weight. The robot adopts a method combining the ground and the downhole control, to automatically seek for the gun perforation borehole, to automatically feed the positive and negative tool electrodes used for the electric spark discharging to the gun perforation borehole, and the unplugging seam welding is performed by using the instantaneous high temperature and high-pressure effects generated by the positive and negative tool electrode discharging in the gun perforation borehole, the thermal effect, the electromagnetic effect, the photoelectric effect, and acoustic effect, etc., and are generated along the discharging process. The invention can conveniently seek the tool electrode in the gun perforation and the tool electrode automatically fed to the gun perforation, the unplugging seam welding effect is good, and the invention has no pollution to the oil reservoir.

Description

technical field [0001] The invention belongs to the technical field of robots, and in particular relates to an electric spark plugging-removing and seam-making robot for oil wells. Background technique [0002] In the process of oil exploitation, crude oil is exploited by natural formation pressure, and the ultimate recovery rate generally does not exceed 10% of the total reserves. Conventional water injection is used for development, and the recovery rate does not exceed 30% to 40%. Low permeability and heavy oil reservoirs is lower. How to effectively dredge oil seepage passages and create new oil seepage fractures to improve the recovery of plugged wells and low-permeability oil wells is a topic that is being studied by all oil-extracting countries in the world. [0003] At present, there are three relatively mature methods of oil seepage channel plugging removal and fracture creation at home and abroad: fracturing, acidification, and liquid extrusion. These three techn...

AI Technical Summary

Problems solved by technology

These three technological methods all have the following problems: they all need to use chemical solutions to squeeze the pollutants near the wellbore into the deep part of the formation, which can easily cause secondary pollution; layering treatment is difficult, often resulting in layers with high porosity If the layer with poor porosity is treated, the effect will not be received, which will affect the production degree of the oil layer, and even the aquifer layer will be removed, resulting in water flooded oil layer; it is very difficult to treat the well with poor cementing quality, casing deformation and damage. Difficult and expensive

At present, there is no literature report on oil well electric spark plugging removal and fracture creation robot at home and abroad

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