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Cyclone type inflow control valve

A technology of inflow control valve and swirl chamber, which is applied in the direction of production fluid, wellbore/well valve device, wellbore/well components, etc. problems, to achieve the effect of improving oil recovery, prolonging oil production time, and improving reliability

Active Publication Date: 2019-01-04
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the direct contact between crude oil and water body, with the continuous extraction of crude oil in the production process, the energy of the formation is depleted, especially near the wellbore, so the edge / bottom water continues to advance non-uniformly to the wellbore, and even breaks through into the wellbore, so that the water breakthrough time of the oil well is shortened. In advance, the water-free oil recovery period is shortened. After water enters the wellbore, the strong fluidity will inhibit the flow of crude oil and greatly reduce the production of crude oil, resulting in a reduction in the recovery of crude oil and poor reservoir development effects.
Therefore, in order to maximize the recovery of crude oil, it is necessary to control the edge / bottom water. Before the edge / bottom water enters the wellbore, let the edge / bottom water evenly ridge into the oil layer to avoid After the edge / bottom water enters the wellbore, it will reduce the liquid production of the water outlet section and increase the oil production of other sections, and most of the current water control methods are not only applicable to the edge / bottom water wellbore Before, or only after the edge / bottom water enters the wellbore, the water control method that is suitable for both before and after the wellbore water breakthrough and has a significant water control effect is still blank. Therefore, it is of great importance to develop an efficient and widely applicable water control tool. Practical significance, the valve that can automatically identify the fluid according to the fluid properties, and guide different fluids to flow through different flow channels, and produce different flow pressure drops is of great significance, which will strengthen the reduction of water cut in bottom water reservoirs and increase crude oil production The effect of improving the production efficiency of the oil field

Method used

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  • Cyclone type inflow control valve
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as Figure 2-Figure 4 As shown, the restrictor valve 4 includes an end cover 6 and a base 7, the base 7 is provided with a liquid inlet 8 and an annular flow channel 9 communicating with the liquid inlet 8, the annular flow channel 9 is arc-shaped, Thus, the fluid guided into the annular flow channel 9 flows in an arc-shaped trajectory, and is located in the circular cavity surrounded by the annular flow channel 9, and a swirl chamber 12B and a plurality of swirl chambers 10A are distributed along the circumferential direction. The guide flow channel 11 of the cyclone chamber 12B is located in the annular flow channel, and the opening direction of the guide flow channel 11 is the same as the flow direction of the fluid in the annular flow channel 9 here, that is, the flow direction of the guide flow channel 11 and the fluid in the annular flow channel 9 The flow direction is the same, the fluid in the annular flow channel 9 enters the guide flow channel 11 tangenti...

Embodiment 2

[0034] Such as Figure 5 As shown, the base 7 of the restrictor valve 4 is provided with a liquid inlet 8 and an annular flow channel 9 communicating with the liquid inlet 8. The annular flow channel 9 is arc-shaped, thereby guiding the The fluid flows in an arc-shaped trajectory, located in the circular cavity surrounded by the annular flow channel 9, and a plurality of swirl chambers A10 are distributed along the circumference, and the swirl chamber A10 contains fluid with tangential flow For spiral flow, the guiding flow channel 11 of the cyclone chamber A10 is connected to the circular flow channel 9, and the opening direction of the guiding channel 11 is the same as the flow direction of the fluid in the circular flow channel 9, that is, the guiding channel 11 is connected to the annular flow channel. The flow direction of the fluid in the channel 9 is the same, the fluid in the annular flow channel 9 enters the guide splitter groove 11 tangentially, the liquid inlet 8, t...

Embodiment 3

[0038] The swirl type inflow control valve of embodiment 1 works in the production well as follows:

[0039] The reservoir fluid flows into the control chamber 16 after filtering the sand through the screen tube 3, and then enters the annular flow channel 9 through the liquid inlet 8 of the restrictor valve 4 in the control chamber 16, and part of the fluid passes through the nozzle A14 in the cyclone chamber A10 After throttling, it flows into the base pipe 1, and another part of the fluid is pre-selected by the annular flow channel 9, and then enters the swirl chamber B12 from the guide flow channel 11, and performs a spiral movement in the swirl chamber 12B, and finally is throttled by the nozzle B15 Flow into base pipe 1.

[0040] 1. When the fluid is pure oil, after the oil enters the restrictor valve 4 from the liquid inlet 8, due to the high viscosity of the oil, the viscous force is much greater than the inertial force, and tends to flow out of the restrictor valve 4 a...

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Abstract

The invention discloses a cyclone type inflow control valve comprising a base pipe. A top cover and a sieving pipe sleeve the outside of the base pipe. A plurality of liquid inlets are formed in the middle of the base pipe; flow-limiting valves are installed at the liquid inlets and include upper end covers and bases; swirling chambers and swirling water chambers are arranged at the bases; nozzlescommunicated with the base pipes are arranged at the bottoms of the swirling chambers; guiding diversion grooves communicated with annular flowing channels and the swirling chambers are arranged on the side walls of the swirling chambers; nozzles communicated with the base pipes are arranged at the bottoms of the swirling chambers; and base pipe liquid inlets communicated with the flow-limiting valve are formed in the base pipe. The cyclone type inflow control valve has the following beneficial effects: the pressure drops of fluid flowing into the cyclone type inflow control valve can be adjusted automatically based on the nature of the fluid; and the cyclone type inflow control valve is suitable for the edge / bottom water reservoir and the gas capped reservoir with high anisotropy.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a swirl-type inflow control valve used for increasing oil, controlling water and controlling gas in oil exploitation. Background technique [0002] In major oil fields at home and abroad, edge / bottom water reservoirs are widely distributed and have huge oil reserves. Due to the direct contact between crude oil and water body, with the continuous extraction of crude oil in the production process, the energy of the formation is depleted, especially near the wellbore, so the edge / bottom water continues to advance non-uniformly to the wellbore, and even breaks through into the wellbore, so that the water breakthrough time of the oil well is shortened. In advance, the water-free oil recovery period is shortened. After water enters the wellbore, the strong fluidity will inhibit the flow of crude oil and greatly reduce the production of crude oil, resulting in a re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/12E21B34/06
CPCE21B34/06E21B43/12
Inventor 阳明君吴欣袁张颖岳迎春胡忠志史君林
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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