Hydraulic jet perforation, fracturing and gas lift liquid drainage integrated technical pipe column

Abstract

The invention discloses a hydraulic jet perforation, fracture and gas lift liquid drainage integrated technical pipe column, which is applied to the oilfield gas well vertical shaft hydraulic jet perforation and fracture and the liquid drainage after the fracture, and a row of pipe columns can complete the oilfield gas well vertical shaft hydraulic jet perforation and fracture and the liquid drainage after the fracture. 2 to 5 gas lifting valves are connected in a casing sequentially from top to bottom by an oil pipe; the lower part of the gas lifting valve is connected with 1 to 4 first-stage hydraulic injectors by the oil pipe; the lower part of each first-stage hydraulic injector is connected with a sliding sleeve base; the lower end of the lower sliding sleeve base is connected with a second-stage hydraulic injector by the oil pipe; the lower end of the second-stage hydraulic injector is connected with a check valve; the lower end of the check valve is connected with a sieve tube and a pipe plug; the first-stage hydraulic injectors are arranged opposite to the top of an upper gas pay; and the second-stage hydraulic injector is arranged opposite to the top of a low gas pay. The invention has the advantages of realizing the jet perforation, fracturing of separated layers and gas lift liquid drainage without moving the pipe columns.

Description

technical field [0001] The invention relates to the technical field of oil field workover, in particular to an integrated process pipe string in which hydraulic jet perforation fracturing of a gas well vertical well and liquid drainage after fracturing are completed by one pipe string. Background technique [0002] At present, for gas wells with two or more perforation sections at the same time, to perform layered fracturing and liquid drainage after fracturing to seek production, it is generally first to use the cable perforation method to shoot all the perforation sections sequentially, and then A layered fracturing tool composed of multiple packers is lowered for fracturing. After the fracturing is completed, if the gas well cannot spray through itself, swabbing or coiled tubing is used to drain fluid for production. The above method has many construction procedures, long construction period, and great damage to the reservoir, especially the risk of blowout when swabbing ...

AI Technical Summary

Problems solved by technology

The above method has many construction procedures, long construction period, and great damage to the reservoir, especially when using swabbing to drain liquid, there is a risk of blowout

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