A multi-purpose downhole casting and fishing device with a guiding structure

Abstract

A multi-purpose downhole fishing device with a guide structure, comprising a rope cap head located at the uppermost end, an upper joint is connected below the rope cap head, an installation groove is processed in the middle of the upper joint, a lower joint is connected below the upper joint, and a lower joint is connected below the top joint. The guide joint, the rope cap head is connected with the steel wire to go downhole, the slips grab the instrument to be fished under the action of the ejector rod spring and the ejector rod, and the cam is used to control the ejector rod stroke to prevent false triggering when going into the well. After the slips are opened, the positions of the ejector rod and the slips are locked, so that the instrument can be separated from the throwing and fishing device smoothly. The guide joint has a cone angle and an opening of a special shape. It has the advantages of reliable grasping and small trigger force, and because of the added guide mechanism, the present invention can overcome the steps of the tool section, and has strong passability under the premise of ensuring the success rate of docking, and can realize the advantages of jumping and salvaging .

Description

technical field [0001] The invention belongs to a downhole fishing device in the field of oil and gas field development, in particular to a multipurpose downhole fishing device with a guiding structure. Background technique [0002] Downhole tool sections (such as concentric water distributors, etc.) often need to put in tools such as sealing sections and pressure gauges for long-term testing. Traditional instrument placement generally uses impact force to cut copper pins to release the instrument, which requires a large impact force , it is easy to fail in launching; at the same time, in order to ensure reliable docking, the bottom of traditional fishing tools is all flat and right-angled. Due to the extremely small diameter difference between them, it is also difficult for the fishing tool to pass through the tool section and salvage the instruments on the next layer. Contents of the invention [0003] In order to solve the above-mentioned deficiencies in the prior art,...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a multi-purpose downhole fishing device with a guiding structure, which can solve the problems of unreliable feeding and poor tool passability, and has two functions of throwing and fishing. Cut off the pin to release the instrument, the advantage of small trigger force, and has a very strong passability and a high success rate of docking

Images