Upstream injection sucker-rod pump same well mining and injecting device

Abstract

The invention discloses an upstream injection sucker-rod pump same well mining and injecting device. The upstream injection sucker-rod pump same well mining and injecting device comprises two following components including a separation component and a swabbing component, wherein by means of the separation component, a stock solution generated in a working well can be separated into different separation products with main components being different in performance underground; and by means of the swabbing component, two functions can be achieved in the upstream process of a movement assembly contained in the swabbing component, one function is that power needed by stock solution separation and a temporary storage space for the separation products are provided for the separation component, and the other function is that the different separation products generated in the previous working circulation are pressurized at the same time. The upstream injection sucker-rod pump same well mining and injecting device is used for a sucker-rod pump mining well, the components of the products in the well are separated underground, when a working bolt support moves upwards, the separation product with relatively large expected component content is mined, the separation product with relatively large unexpected component content is synchronously reinjected, the mining and injection actions can acquire sufficient power through ground hoisting equipment, and the mining and injecting flow ratio can be directly and effectively controlled through a working cavity volume ratio inside the device.

Description

technical field [0001] The invention relates to oil exploitation technology, in particular to an upward injection rod pump simultaneous well production and injection device. Background technique [0002] As oilfield development enters the middle and later stages, there are more and more oil wells with high water cut. High water cut results in higher energy consumption for fluid production in oil wells, higher surface sewage treatment volume, higher treatment costs, shorter economic production life of oil wells, and more shut-down wells. In order to maintain oil production and alleviate the above problems, technicians in the industry have proposed a production process in which oil and water are separated downhole and the produced water is reinjected into the same well in selective layers. For rod pump production wells that dominate the production wells, the existing oil-water separation and simultaneous well production and injection technologies mainly have the following two...

AI Technical Summary

Problems solved by technology

There are two problems in the above implementation methods. One is that the downward injection method is difficult to inject in the high-pressure reinjection layer, which may easily cause problems such as rod column bending, slow down, and increased eccentric wear of the rod tube; Changes due to the influence of pressure, unable to accurately control split ratio and production and injection flow

Images