Downhole device and production method suitable for non-killing well operation

Abstract

The invention discloses a downhole device and production method suitable for non-killing well operation. The downhole device comprises an upper center pipe, an extrusion sleeve, a locking piece, upperslips, an upper cone, a rubber sleeve, a lower cone, lower slips, a sleeve and a lower center pipe. The extrusion sleeve is assembled on the upper part of the upper center pipe, and the locking piece, the upper slips, the upper cone, the rubber sleeve, the lower cone and the lower slips are arranged under the extrusion sleeve in sequence. The locking piece, the upper slips, the upper cone, the rubber sleeve, the lower cone and the lower slips are arranged on the upper center pipe in a sleeving mode, the sleeve is arranged at the lower end of the upper center pipe, and an outflow groove is formed in the middle part of the sleeve. The production method comprises the steps that step one, a setting tool is arranged at a predetermined position; step two, setting-releasing is carried out; stepthree, seal examining is carried out; step four, a fracturing wellhead is removed; step five, oil and gas recovery trees are arranged; and step six, flow channels are established. The downhole deviceand production method suitable for non-killing well operation have the beneficial effects that the production efficiency is improved, costs are saved, and the practicability is high.

Description

technical field [0001] The invention relates to a downhole device and a production method, in particular to a downhole device suitable for snubbing operation and a production method. Background technique [0002] At present, in the development process of unconventional gas reservoirs such as tight gas and shale gas, hydraulic fracturing is a necessary production measure. In order to meet large-scale reservoir stimulation with large displacement, casing fracturing is commonly used in the stimulation process. Considering the weak liquid-carrying capacity of the casing, tubing with a small internal diameter needs to be lowered after the fracturing operation to meet the liquid-carrying and stable production requirements of the gas well. At present, there are three common ways to run the production string after fracturing: one is to use a snubbing device to run in a conventional tubing; the other is to use a coiled tubing vehicle to run in a coiled tubing; Wellhead and lower tu...

AI Technical Summary

Problems solved by technology

On the one hand, if the plug is made of conventional materials, it will fall into the bottom of the well after being knocked out, which will affect the later operation; on the other hand, if the plug is made of soluble materials, it is difficult to accurately control the dissolution time when the tool is lowered into the well, and premature dissolution may easily cause well control risks

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