Horizontal well logging anti-lift unlocking device

Abstract

The invention discloses a horizontal well logging rod and tube delivery tappet anti-lift unlocking device, which is applied to instrument delivery of horizontal well logging of an oilfield. The anti-lift unlocking device consists of a hanging anti-lift shell and an anti-lift device, wherein the hanging anti-lift shell consists of a coupling, an anti-lift body and a hanging body; the anti-lift device consists of an anti-lift cone, an anti-lift slip ring, a garter spring, a slip seat, a piston body, a positioning pin, a tension spring, a piston limiting cylinder and a tension spring plug; the anti-lift cone is provided with a conical surface; the anti-lift slip ring and the garter spring are combined and then are sleeved on the conical surface on the anti-lift cone; the lower part of the anti-lift slip ring is arranged in a mounting groove in the upper part of the slip seat; the upper part of the piston limiting body is used for placing the piston body; the positioning pin is arranged in a threaded hole in the piston limiting body; and the tension spring plug is blocked at the lower end of the piston limiting body under the acting force of the tension spring. The anti-lift unlocking device has the effects of reliable anti-lift property, capability of providing delivery capacity of 3 tons and smooth unlocking.

Description

technical field [0001] The invention relates to the field of oilfield production logging, in particular to a tappet anti-jacking and unlocking device used in the horizontal well production logging process and an on-site use method. Background technique [0002] At present, in the horizontal well testing process, it is necessary to use an anti-top device, which can make the tubing string push the tappet string, provide power for horizontal transportation, and transport the testing instrument to the predetermined position; at the same time, it can also be used after the instrument reaches the testing position It is unlocked so that the testing instrument can be lifted up to complete continuous testing. This device is a key component that determines the success or failure of horizontal well logging. [0003] Chinese patent announcement number CN2083190 provides a kind of "underground anti-jack device". It is mainly composed of a lower joint, a hoop spring, a friction plate, a ...

AI Technical Summary

Problems solved by technology

The anti-top slip needs to lift up the pipe string when unlocking, which cannot achieve the purpose of only unlocking the tappet string while the tubing string does not move, and cannot meet the logging requirements of horizontal wells

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