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Branched flow channel type self-adaptation inflow control device

An inflow control and self-adaptive technology, applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc., can solve the problems of EquiFlowAICD's complex structure and poor applicability, so as to ensure long-term stable production, suppress flow, and increase flow Effect of resistance level

Inactive Publication Date: 2014-05-21
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the balanced chip AICD and RCP both contain movable parts and can only control the air cone; the EquiFlow AICD has a complicated structure and currently only has 2 sizes, so its applicability is not strong

Method used

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  • Branched flow channel type self-adaptation inflow control device
  • Branched flow channel type self-adaptation inflow control device
  • Branched flow channel type self-adaptation inflow control device

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Embodiment Construction

[0014] Below in conjunction with accompanying drawing, content of the invention will be further described: with reference to Figure 1-Figure 4 As shown, the bifurcated channel type adaptive inflow control device includes a base pipe 2, an upper outer casing 3, a sand control screen 6, a lower outer casing 7 and a bifurcated inflow control box 8, which is characterized in that: the two ends of the base pipe 2 are connected to The connected oil pipes are connected through the threaded section 1 at the end. The inner diameter of the base pipe 2 is the same as that of the oil pipe. The inflow control chamber 4 is preset on the base pipe 2, and the inflow control box 8 is embedded in it. The hole 5 matched with the nozzle 11 on the back of the control box 8 is used as a passage for the fluid to flow into the base pipe 2. The upper casing 3, the sand control screen 6 and the lower casing 7 are connected by welding, and the upper casing 3 and the lower casing 7 are close to the sand ...

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Abstract

A branched flow channel type self-adaptation inflow control device comprises a base tube, an upper portion outer sleeve, a sand control screen tube, a lower portion outer sleeve and an inflow control box in a mutual connection mode. The type of fluid can be automatically identified, the level of flowing resistance can be automatically adjusted according to the characteristics of the fluid itself, before water breakthrough, certain resistance is exerted on the fluid, influences of a heeling effect and a reservoir stratum anisotropism can be offset, and therefore inflow sections along a horizontal shaft are even; once water breakthrough happens, flowing resistance will be increased obviously, so that flowing on a water layer section is restrained, and the long-period stable yield of an oil-gas well is guaranteed.

Description

technical field [0001] The invention relates to a device for improving the effect of oil field development, in particular to a bifurcated channel type self-adaptive inflow control device. Background technique [0002] In long horizontal wells, due to the heel effect or the influence of reservoir heterogeneity, the heel effect is due to the large drainage area of ​​the reservoir controlled by both ends of the horizontal well, resulting in a higher wall velocity at both ends of the horizontal well than in the middle section of the horizontal well. , the phenomenon of premature water / gas breakthrough at both ends, the production of oil wells in some positions is much higher than that in other positions, and the resulting uneven production profile may cause premature water / gas breakthrough in the wellbore at these positions. Once coning occurs, well production is significantly reduced due to restricted flow elsewhere. In order to eliminate this unbalanced phenomenon, commonly u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/12
Inventor 魏建光赵法军曾泉树李江涛刘达京陈曦
Owner NORTHEAST GASOLINEEUM UNIV
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