A hydraulic drop-in hand-feeding tool

Abstract

The invention relates to a hydraulic hands-free feeding tool, which belongs to the technical field of downhole operation tools for oil and gas wells. It consists of an anchoring piece and a setting piece. The bottom end of the anchoring piece is threaded with a setting piece, and the setting piece is fixedly connected with the anchoring piece through fastening bolts. Simple, when working, by designing stroke compensation on the release part, it can effectively reduce the frictional resistance in the process of dropping the hand, avoiding the situation that it is difficult or impossible to drop the hand, so as to realize the operation of dropping the hand smoothly; The entry tool has a hand-lost indication feature. When liquid returns from the oil pipe or a sudden drop in the annular pressure is observed, it means that the entry tool has been successfully dropped; the entry tool has an emergency release function, which can be turned by The pipe string can realize emergency drop-off, which is very suitable for drop-off operations in highly deviated oil and gas wells and deep wells.

Description

technical field [0001] The invention relates to a hydraulic hands-free feeding tool, which belongs to the technical field of downhole operation tools for oil and gas wells. Background technique [0002] When oil and gas wells are performing multi-stage fracturing in well cementing and horizontal wells, it is usually necessary to use the liner isolation hanger for liner suspension or interlayer isolation; When the running tool is completed, when the liner operation is performed in highly deviated wells and deep wells, the traditional running tool has the following problems due to structural defects: 1. When the running tool is impacted or vibrated, it is easy to lose the pipe midway The occurrence of the column situation will directly lead to more complicated internal conditions of the wellbore; 2. There is no indication after the feeding tool is dropped, and it is impossible to clearly judge whether the bottom hole has been dropped successfully; 3. When the dropping operatio...

AI Technical Summary

Problems solved by technology

[0002] When oil and gas wells are performing multi-stage fracturing in well cementing and horizontal wells, it is usually necessary to use the liner isolation hanger for liner suspension or interlayer isolation; When the running tool is completed, when the liner operation is performed in highly deviated wells and deep wells, the traditional running tool has the following problems due to structural defects: 1. When the running tool is impacted or vibrated, it is easy to lose the pipe midway The occurrence of the column situation will directly lead to more complicated internal conditions of the wellbore; 2. There is no indication after the feeding tool is dropped, and it is impossible to clearly judge whether the bottom hole has been dropped successfully; 3. When the dropping operation is performed, the feeding tool The frictional resistance between the internal piston and the center tube is large, which makes it difficult to cut the shearing pin, and it is easy to lose the hand, or even cannot lose the hand, so it is necessary to improve it

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