Eccentric water distributor for oil field

Abstract

The invention relates to an eccentric water distributor for an oil field, and relates to the technical field of oil field downhole tools. The eccentric water distributor comprises an upper connector, a valve element seat, an upper outer sleeve, an upper central pipe and a valve element, wherein the upper and lower ends of the upper outer sleeve are fixedly connected to the outer sides of the upper connector and the valve element seat respectively, and the upper and lower ends of the upper central pipe are connected to the inner sides of the upper connector and the valve element seat respectively in a sealed mode; and an annular space is reserved between the upper outer sleeve and the upper central pipe, an axial valve element installation hole is machined in the valve element seat and comprises three different hole-diameter sections including a large-diameter section, a medium-diameter section and a small-diameter section according to the relation of the hole diameters, the three sections are arranged in sequence from top to bottom, a valve element push rod is inserted in the valve element installation hole in a sliding mode, a large-diameter piston and a small-diameter piston are arranged on the valve element push rod, the large-diameter piston is sealed in the large-diameter section in the sliding mode, and the small-diameter piston is sealed in the medium-diameter section in the sliding mode. The invention provides the mechanical eccentric water distributor for the oil field. According to the eccentric water distributor, the injection amount can be adjusted without replacing a water nozzle of a blanking plug.

Description

technical field [0001] The invention belongs to the technical field of oilfield downhole tools, in particular to an eccentric oilfield water distributor. Background technique [0002] Water flooding is the main method of oil recovery in major domestic oilfields. The water distributor is the main tool for water flooding. The function of the water distributor is to adjust the injection amount of polymer in each reservoir to better achieve the purpose of increasing production. The traditional water distributor includes a shell and an eccentric plug inserted in the shell. After installation, it is necessary to take out the plug in the shell through downhole operation, and adjust the injection volume by replacing the water nozzle in the plug. Purpose, when this adjustment method is implemented, the thrower often gets stuck, and the success rate of throwing fish is low, which seriously affects the operation efficiency. [0003] In addition, there is also an electronically control...

AI Technical Summary

Problems solved by technology

However, there are obvious defects in the electronically controlled water distributor: the electrical part of this water distributor needs to be completely installed in a closed, dry, and waterproof space, so the sealing performance of the sealing structure inside the water distributor is required to be high. The temperature has high requirements on the high temperature resistance of the electrical components in the water distributor, and many circuit components are easily damaged at high temperatures

It can be seen that the stability of the electronic control system of the electronically controlled water distributor is poor

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