Low shear single well mixed liquid injection allocation equipment

Abstract

The invention discloses low shear single well mixed liquid injection allocation equipment. The low shear single well mixed liquid injection allocation equipment comprises a liquid injection pipeline and a pressure adjusting polymer injection device, the liquid injection pipeline is provided with a high pressure ball valve and a pressure transmitter, and the low shear single well mixed liquid injection allocation equipment further comprises a flow measuring and controlling assembly, a check valve, a mixed liquid inlet and a mixer which are sequentially arranged; the pressure adjusting polymer injection device comprises at least two change-over valves, at least one spiral pipeline arranged between two adjacent change-over valves and a washing device, and the washing device comprises a washing water inlet pipe and washing water outlet pipe which correspondingly communicate with the two change-over valves along the front end and the rear end of a flow body; and the pressure transmitter andthe flow measuring and controlling assembly are correspondingly connected with a control system. According to the low shear single well mixed liquid injection allocation equipment, pressure adjustment is commonly completed through the flow measuring and controlling assembly and the pressure adjusting polymer injection device, and adjusting is more accurate; viscosity reducing in a controllable range is guaranteed through the pressure adjusting polymer injection device; the double-procedure operation is arranged in the pressure adjusting polymer injection device, clear water is adopted to washonline, and the service life is prolonged; and the low shear single well mixed liquid injection allocation equipment is easy to mount, and adjustment is flexible.

Description

technical field [0001] The invention relates to the technical field of tertiary oil recovery, in particular to a low-shear single-well mixed liquid dispensing device. Background technique [0002] At present, only one-third of the world's oil is extracted, and increasing the global oil extraction by one percentage point can provide the world's two-year use. Therefore, using various technical means to enhance oil recovery has become a very meaningful discussion topic. Tertiary oil recovery is a technology used to enhance oil recovery in oilfields through methods such as gas injection, chemical injection, ultrasonic stimulation, microbial injection or heat recovery. Among them, the polymer flooding method is the most commonly used enhanced oil recovery method for enhancing oil recovery, which can increase the oil recovery rate of the oil reservoir by at least 8% in the late stage of conventional production. [0003] The polymer flooding method is to add polymers to the injec...

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is that the existing dispensing device has the problems that the viscosity cannot be adjusted accurately, the polymer injection requirement cannot be met and the device is easily blocked

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