Unclamping method and device adopting continuous jarring through spring periodically stretching out and drawing back

Abstract

The invention discloses a jam-releasing method and device using spring periodic stretching and continuous vibration. The invention is to set a valve in the pipe string. When the circulating fluid pressure entering the pipe string is greater than the reaction force of the spring inside the pipe string, the valve hole When it is closed, the circulating hydraulic pressure compresses the spring and converts it into the compressed elastic potential energy of the spring. When the compressed potential energy of the spring gradually increases to equal the circulating hydraulic pressure, the valve hole opens, causing the pressure in the pipe string to become unbalanced instantly, and the compressed elastic potential energy of the spring is instantly released and released. Drive the shock hammer in the pipe string to suddenly impact upwards, and transmit the impact kinetic energy to the stuck point through the pipe string; after completing one shock, all parts in the pipe string will reset at the same time to prepare for the next energy storage impact, and repeat the above process , forming periodic repeated vibration until the card is released. The invention can not only be used for the salvage operation of vertical wells, but also can be used for the jamming and salvage operations of inclined wells, extended displacement wells and horizontal wells. There is no need to manually reset the operation during operation, and it can continuously vibrate until the card is released, which is more efficient and faster than conventional technology.

Description

technical field [0001] The invention relates to a stuck-releasing method and device using periodic stretching and continuous vibration of springs, and belongs to the technical field of downhole stuck-releasing of horizontal wells in oil fields. Background technique [0002] In the development process of highly deviated wells or horizontal wells in oil fields, tools such as packers, slips, hydraulic anchors, and pumps need to be lowered into oil, gas and water wells to perform various operations. These tools have been working downhole for a long time; Production strings are often unable to be lifted, lowered, and rotated due to sand, salt, scaling, waxing, etc. Tool stuck accident is the most common and most easily caused downhole pipe string stuck in workover construction. Existing jam release methods mainly adopt measures such as vigorously pulling activity jam release and jar jam release. To release the jam by vigorously pulling, it is necessary to lift the pipe string vi...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a method and device for unjamming using periodic stretching and continuous vibration of springs, so as to solve the problem that the existing jars cannot transmit the lifting force on the wellhead of highly inclined wells or horizontal well sections to the downhole level. The technical problem that the fish fell in the section well cannot be salvaged, so as to overcome the shortcomings of the existing technology

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