Variable flow channel type inflow control device, oil extraction short section and production pipe string

An inflow control and flow channel technology, which is applied in the field of oil well completion and production, can solve problems such as oil well production decline, and achieve the effect of solving high water cut problems and improving reservoir recovery.

Active Publication Date: 2020-04-17
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0003] The existing inflow control device generally has a fixed flow path, although it can delay the outflow of water / gas, but due to its constant flow resistance rating (FRR), once a water / gas cone occurs, low-viscosity water / gas will occupy the entire wellbore , and inhibit the flow of the oil phase, resulting in a significant drop in well production

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  • Variable flow channel type inflow control device, oil extraction short section and production pipe string
  • Variable flow channel type inflow control device, oil extraction short section and production pipe string
  • Variable flow channel type inflow control device, oil extraction short section and production pipe string

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Embodiment Construction

[0031] In order to make the technical solutions and advantages of the present invention clearer, the exemplary embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only a part of the embodiments of the present invention, and are not exhaustive of all the embodiments. And in the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with each other.

[0032] The inventor noticed during the invention process that the existing inflow control device has a fixed flow channel and constant flow resistance, which cannot solve the problem of water / air coning.

[0033] In view of the above deficiencies, the embodiment of the present invention proposes a variable channel type inflow control device, which can automatically adjust the size of the channel according to different fluid properties, and its flow resistance ...

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Abstract

The invention provides a variable flow channel type inflow control device, an oil extraction short section and a production pipe string. The inflow control device comprises an upper valve body which is provided with a flow channel inlet; a lower valve body which is connected with the upper valve body to form a cavity, wherein a flow channel outlet is arranged in the lower valve body; and a floating disc which is arranged in a cavity between the upper valve body and the lower valve body, wherein the vertical position of the floating disc is automatically adjusted according to the viscosity of the fluid flowing in from the inlet of the flow channel so that the flow speed of the fluid flowing through the flow channel is adjusted. According to the inflow control device, the size of the flow channel can be automatically adjusted according to different fluid properties so that the purposes of stabilizing oil and controlling water / gas can be achieved.

Description

technical field [0001] The invention belongs to the technical field of petroleum well completion and production, and in particular relates to a variable flow path type inflow control device, an oil production pup joint and a production pipe string. Background technique [0002] Most of the sandstone oilfields have entered an ultra-high water cut period as a whole, and the remaining oil is highly dispersed, making production more difficult, and the situation of stabilizing oil and controlling water is very severe. It is very difficult to control water in the later stage of horizontal wells. Due to factors such as the "heel-toe effect", reservoir heterogeneity, reservoir anisotropy and natural fractures, the production profile of long horizontal wells is difficult to continue and advance in a balanced manner. Premature water / gas is seen at the heel, high-permeability intervals and fractures. Once the oil well sees water / gas, due to the low viscosity of water / gas, a fast chann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/12E21B43/32
CPCE21B43/121E21B43/32
Inventor 邵志香张瑞亢武臣廖洪千李夯杨德锴程光明
Owner CHINA PETROLEUM & CHEM CORP
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