An electro-hydraulic drive setting tool

Abstract

The invention discloses an electro-hydraulic driving setting tool which comprises an upper connector, a balancing piston, a cylinder barrel, a pump station system, an acting cylinder, an inner sleeve and an outer sleeve, wherein the upper connector is located at the top of the cylinder barrel and is connected with a ground power supply; the balancing piston is sleeved in the cylinder barrel in a sliding form; the balancing piston, the cylinder barrel and the acting cylinder at the bottom of the cylinder barrel form a sealed cavity which is served as a system oil tank; the pump station system is located in the cavity and is used for outputting high-pressure oil for the acting cylinder; the upper part of the inner sleeve is connected with the bottom of the acting cylinder barrel of the acting cylinder through a thread; the lower part of the inner sleeve is connected with a spindle of a packer; the outer sleeve is sleeved on the inner sleeve in a sliding form and is connected with a piston rod of the acting cylinder through a connecting device; the outer sleeve is connected with an expandable compressing part of an external packer; and the piston rod drives the outer sleeve to carry out a setting operation under the effect of hydraulic pressure. The electro-hydraulic driving setting tool provided by the invention can supply a bigger axial thrust to an expandable packer and is recoverable and reusable; the axial thrust can be changed according to different well conditions; and the electro-hydraulic driving setting tool is suitable for any packer.

Description

technical field [0001] The invention relates to a downhole setting tool, in particular to an electro-hydraulic driving setting tool. Background technique [0002] At present, in the completion process of oil and gas fields, especially in the completion process of horizontal wells and extended-reach wells, it is necessary to use top packers to suspend a part of the production strings in the casing, and the running strings will complete the seating of the packers. After sealing, it needs to be thrown away from the packer, and the running string should be raised from the wellhead. However, for various types of packers, the general practice is to use different release mechanisms, and the release mechanism is often designed as one with the packer. Once the operation is completed, the release mechanism is generally discarded, which greatly The waste of resources; the packer that needs to carry high tension and compression loads and has multiple ways of throwing away is not only e...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology, provide an electro-hydraulic drive setting tool, solve the problem of great waste caused by one-time use of the setting tool in the current technology, and provide large axial thrust

Images