A full-bore hydraulically driven layered fluid injection and fracturing device

Abstract

The invention relates to a full-drift-diameter hydraulic-drive layering liquid injection and fracturing device and method. According to the technical scheme, an upper connector and a lower connector are connected through a center pipe, a sealing piston, a constant pressure switch, a uniflow sliding way body, a rotating ring pressing cap and a rotating ring from a movement body, the constant pressure switch is arranged between the sealing piston and the center pipe, the lower portion of the constant pressure switch is connected with the uniflow sliding way body, the lower portion of the uniflow sliding way body is provided with the rotating ring, the upper portion of the rotating ring is connected with the center pipe through the rotating ring pressing cap, the rotating ring rotates around the center pipe, the lower portion of the movement body is provided with an energy storage mechanism, the bottom of the energy storage mechanism is connected with an energy storage pad, the lower portion of the energy storage pad is connected with a pressure adjusting ring, the pressure adjusting ring is connected with a sealing cylinder sleeve through a positioning pin, and a rail is arranged in the middle of the center pipe. The full-drift-diameter hydraulic-drive layering liquid injection and fracturing device and method have the advantages that the process is simple, it is avoided that multiple layers of pipe columns are placed into a well, layering liquid injection is clear, pressuring is conducted from top to bottom, the device reaches the required water injection layers, and multi-layer connection water injection is achieved; the adjustable function and closable function in the downhole water injection work are achieved, layering water injection is achieved, and meanwhile joint injection can be achieved.

Description

technical field [0001] The invention relates to equipment for oil production, in particular to a full-diameter hydraulically driven layered liquid injection and fracturing device. Background technique [0002] In oil field production, multi-level is a common phenomenon. In many layers, the oil-water content of liquid is different. In order to improve efficiency, in oil field production, it is necessary to inject ash, water shut-off agent, chemical water shut-off Block the water layer and exploit the oil layer in other ways to increase the oil recovery rate, reduce the cost and increase the benefit. A mechanical layering device also appeared in the later period, but its existing problem is that the tool cannot realize reversing. The current situation of separate injection in oil wells is as follows: firstly, the eccentric water distributor is used, which needs to be quantified, and the downhole water injection operation cannot be adjusted, cannot be closed, and different liq...

AI Technical Summary

Problems solved by technology

Mechanical layering devices also appeared in the later period, but the problem is that the tool cannot achieve reversing

The current situation of separate injection in oil wells is as follows: firstly, the eccentric water distributor is used, which needs to be quantified, the downhole water injection operation cannot be adjusted, cannot be closed, and different liquids cannot be injected; the second is the layered plug injection method, which has the advantages of It can achieve the purpose of separate injection, and can inject different liquids. At the same time, the disadvantages are that the process is complicated, the lower multi-layer string is difficult to operate, and it is impossible to realize the combined injection of more than two layers.

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