A parallel inflow control box and a parallel inflow control device

An inflow control, parallel technology, used in the production of fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems of complex structure and poor applicability of adaptive inflow control devices, achieve flow suppression, ensure long-term The effect of stable production and increased flow resistance

Active Publication Date: 2016-11-16
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem of complex structure and poor applicability of the self-adaptive inflow control device in the prior art

Method used

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  • A parallel inflow control box and a parallel inflow control device
  • A parallel inflow control box and a parallel inflow control device
  • A parallel inflow control box and a parallel inflow control device

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Embodiment Construction

[0021] The parallel inflow control box of the present invention will be further described in detail below in conjunction with the accompanying drawings. A parallel inflow control box, including a parallel flow divider 8 and a hollow flow restrictor 10; the parallel flow divider 8 contains a flow limiting pipeline 9 and a friction pipeline 11, and the flow limiting pipeline 9 expands the flow area The pipelines arranged alternately by contraction, the frictional resistance pipeline 11 is a curved pipeline, the outlet 92 of the flow limiting pipeline and the outlet 112 of the frictional resistance pipeline are all connected with the flow limiter 10, and the parallel flow control box 7 is provided with a When the liquid enters the diversion channel 12 inside the parallel inflow control box 7, the inlet 91 of the flow limiting pipeline and the inlet 11 of the friction pipeline are both connected with the diversion channel 12 of the parallel inflow control box 7, and the parallel in...

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Abstract

The invention provides a parallel type inflow control box and a parallel type inflow control device. The parallel type inflow control box can automatically identify fluid of different characteristics, in other word, when the fluid passing through a parallel type flow divider (8) is of an oil phase, the fluid tends to flow into a flow limiting pipeline (9), enters a disc-shaped flow limiter (10) in the radial direction and then directly flows out of an outlet, the length of a flow pass is shorter, and the flow resistance is smaller; when the fluid passes through the parallel type flow divider (8) is of a water phase, the fluid tends to flow into a friction drag pipeline (11), enters the disc-shaped flow limiter (10) in the tangent direction and flows out of the outlet after several-time rotation, the length of a flow pass is longer, and the flow resistance is larger. According to the parallel type inflow control device, the water-phase fluid can be restrained from rapidly entering the disc-shaped flow limiter, and therefore the long-time stable yield of an oil-gas well can be ensured.

Description

technical field [0001] The invention relates to a device for improving the effect of oilfield development, in particular to a parallel inflow control box, or a parallel inflow control device containing the parallel inflow control box. Background technique [0002] In long horizontal wells, due to the "heel effect" and / or the influence of reservoir heterogeneity, the production of the well in some locations is much higher than that in others, and the resulting uneven production These locations see water / air prematurely. Once coning occurs, well production is significantly reduced due to restricted flow elsewhere. In order to eliminate this unbalanced phenomenon, commonly used methods include staged perforation, variable density perforation completion, central pipe completion, etc. However, these methods have limited ability to control the inflow profile, and it is difficult to ensure that the production profile is sufficiently uniform. [0003] In the early 1990s, Norsk Hy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/12
Inventor 曾泉树汪志明王小秋杨刚
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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