Large pressure difference real-time adjustment water distributor

Abstract

The invention discloses a high-pressure-difference real-time adjusting water distributor. The high-pressure-difference real-time adjusting water distributor comprises a central pipe, a water distribution core and a working drum, wherein the upper end of the central pipe is connected with an upper joint through an upper short joint; the water distribution core is arranged in the central pipe; the working drum covers the central pipe; the inner side of the lower end of the working drum is connected with a lower joint; a water distribution adjusting device is arranged between the central pipe and the working drum; and a spit preventing device is arranged at the outer side of the upper short joint at the upper end of the water distribution adjusting device. The spit preventing device comprises a counter preventing piston and a counter preventing spring; the counter preventing piston can vertically slide along the outer surface of the upper short joint; the counter preventing spring covers the outer side of the upper short joint at the upper end of the counter preventing piston; and a pressure transfer through hole is formed in the middle wall of the upper short joint. The high-pressure-difference real-time adjusting water distributor not only can satisfy the high-leakage layer throttle requirement under high interlayer water injection pressure difference, but also can realize stable water injection under the condition of pressure fluctuation, and can effectively reduce the measurement and adjustment workloads and improve the water injection precision.

Description

technical field [0001] The invention relates to a layered water distribution device for water injection wells in oil exploitation, in particular to a large pressure difference real-time regulating water distribution device. Background technique [0002] With the continuous deepening of fine development, the difference in water absorption between high and low permeability layers in the same water injection well is relatively large, resulting in an increase in the water injection pressure difference between layers. At present, the conventional water distributors used in oilfields mostly adopt fixed throttling methods. While increasing the pressure to increase the injection rate of low-permeability layers, it is easy to overfill the high-permeability layers. The serious problem of stab damage increases the number of deployment operations and production costs; in addition, water injection layers with large differences between layers are more sensitive to pressure changes, and a ...

AI Technical Summary

Problems solved by technology

At present, the conventional water distributors used in oilfields mostly adopt fixed throttling methods. While increasing the pressure to increase the injection rate of low-permeability layers, it is easy to overfill the high-permeability layers. The serious problem of stab damage increases the number of deployment operations and production costs; in addition, water injection layers with large differences between layers are more sensitive to pressure changes, and a small fluctuation in pressure will cause the injection volume of each layer to deviate greatly from the allocation. And this kind of deviation can only be found when the regular test just meets the pressure fluctuation, resulting in actually more and less noticeable invalid water injection

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