Oil well electric spark de-blocking joint-forming robot

Abstract

The oil well electric spark plugging removal and fracture-making robot belongs to the field of robot technology. It mainly includes ground cable automatic feeding system, guide wheel, cable, force sensor, upper adaptive support mechanism, perforation eddy current detection and electrode feeding device, conical bearing joint, lower adaptive support mechanism and counterweight, etc. The robot adopts the method of combining ground and downhole control to automatically find the perforation blast hole, automatically feed the positive and negative tool electrodes for electric spark discharge into the perforation blast hole, and use the positive and negative tool electrodes to discharge in the perforation blast hole The instantaneous high temperature and high pressure generated during the discharge process, as well as the accompanying thermal effects, electromagnetic effects, light effects, and acoustic effects during the discharge process, are used to remove plugs and create fractures. The invention can conveniently and quickly find the perforation and automatically feed the tool electrode into the perforation, has good effect of removing plugs and creating cracks, and has no pollution to the oil layer.

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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