Packer and fracturing process pipe string

Abstract

The invention discloses a packer and a fracturing process pipe string. The packer comprises a central pipe, a packer upper joint and a packer lower joint, an elastic assembly, a rubber tube assembly,an upper piston assembly and a lower piston assembly, wherein the packer upper joint and the packer lower joint are arranged at two ends of the central pipe; the elastic assembly is arranged outside the central pipe; the rubber tube assembly is arranged outside the packer upper joint; the elastic assembly is provided with an elastic piece, and the rubber tube assembly is provided with a rubber tube; the upper piston assembly is arranged between the packer upper joint and the central pipe; a first vacuum piston cavity is formed in the upper piston assembly; the lower piston assembly is arrangedbetween the packer lower joint and the central pipe; a second vacuum piston cavity is formed in the lower piston assembly; and the packer upper joint, the upper piston assembly, the central pipe, thelower piston assembly and the packer lower joint have the same inner drift diameters. According to the packer and the fracturing process pipe string disclosed in the invention, in use, large displacement fracturing can be realized, and the design requirements of volume fracturing can be well met.

Description

technical field [0001] The invention relates to the technical field of oil and gas well fracturing, in particular to a packer and a fracturing process string. Background technique [0002] With the rise of new domestic fracturing concepts, volumetric fracturing transformation has become a trend in the fracturing industry. Volume fracturing refers to the continuous expansion of natural fractures and shear slip of brittle rocks in the process of hydraulic fracturing, forming a fracture network in which natural fractures and artificial fractures intersect, thereby increasing the volume of stimulation, increasing initial production and final recovery Rate. [0003] The mechanism of the volume fracturing is as follows: the reservoir is stimulated by hydraulic fracturing, and at the same time as one or more main fractures are formed, the natural fractures are continuously expanded and the brittle rocks are sheared and slipped, so that the natural fractures, The communication of ...

AI Technical Summary

Problems solved by technology

However, the packer in the conventional immobile fracturing string needs to be throttled and set, which leads to a large loss of pump pressure and limited displacement, which cannot achieve the goal of volume fracturing design

That is to say, the use of conventional multi-layer fracturing fixed strings cannot meet the needs of large-scale fracture network volume fracturing construction.

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