A layered injection choke for chemical flooding

A chemical flooding and choke technology, which is applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems of large loss of chemical fluid viscosity, inability to maintain chemical fluid stability, and unsatisfactory chemical flooding effect.

Active Publication Date: 2016-10-19
大庆康盛石油节能科技开发有限公司
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a layered injection choke for chemical flooding to solve the complex structure of the prior art. While controlling the flow rate, the viscosity loss of the chemical liquid passing through the flow control device is large and cannot be maintained. The stability of chemical fluid and the effect of chemical flooding cannot meet the needs of all situations

Method used

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  • A layered injection choke for chemical flooding
  • A layered injection choke for chemical flooding
  • A layered injection choke for chemical flooding

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Embodiment Construction

[0014] see Figure 1-7 , the present invention is a layered injection choke for chemical flooding, which is composed of an upper joint 1 and a choke core 2, wherein the upper joint 1 and the choke core 2 are threaded and installed in a chemical flooding injection device (existing Technology) in the offset hole 3, cooperate with the smooth inner surface of the offset hole 3 to form a labyrinth flow channel 26.

[0015] The choke core 2 is composed of an inlet end 25, a center column 22, a left stopper 23, a right stopper 24 and an outlet end 21 arranged on the same axis, and the top and bottom ends of the center column 22 are respectively connected with cross-sectional shapes Outlet port 21 and inlet port 25 are waist-shaped. A plurality of left stoppers 23 and right stoppers 24 are equidistantly connected to the central column 22 between the inlet end 25 and the outlet end 21 . The left block 23 and the right block 24 are in the shape of a circular plate with a small half cu...

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Abstract

A layered injection choke for chemical flooding, consisting of an upper joint (1) and a choke core (2). After the upper joint (1) is screwed to the choke core (2), it is installed Injecting into the eccentric hole of the device in layers, it is characterized in that the flow resistance core (2) cooperates with the smooth inner surface of the eccentric hole to form a labyrinth flow channel (26). When this device is used, due to the effect of the labyrinth flow channel, the flow field of the liquid flow is redistributed multiple times to consume energy and form resistance to control the flow of the chemical liquid, which can not only control the flow rate, but also make it pass through the flow control device The viscosity loss of the chemical fluid is extremely small, and the stability of the chemical fluid is maintained, which is an important measure to improve the chemical flooding effect.

Description

technical field [0001] The invention relates to an oil recovery process device in an oil field, in particular to a layered injection choke for chemical flooding. Background technique [0002] At present, the application of chemical flooding and separate injection technology in oil fields is becoming more and more common, and the applied well conditions are becoming more and more complex. The traditional chemical flooding choke has a complicated structure. The viscosity loss of the chemical fluid is large, the stability of the chemical fluid cannot be maintained, and the chemical flooding effect cannot meet the needs of all situations. Contents of the invention [0003] The purpose of the present invention is to provide a layered injection choke for chemical flooding to solve the complex structure of the prior art. While controlling the flow rate, the viscosity loss of the chemical liquid passing through the flow control device is large and cannot be maintained. The stabil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00
Inventor 康庆刚
Owner 大庆康盛石油节能科技开发有限公司
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