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Variable flow path inflow control devices, production nipples and production tubing strings

A technology of inflow control and flow channel, which is applied in the field of oil well completion and production, can solve the problems of oil well production decline, achieve the effects of increasing flow rate, improving recovery rate, and solving high water cut problems

Active Publication Date: 2022-05-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

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

Method used

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  • Variable flow path inflow control devices, production nipples and production tubing strings
  • Variable flow path inflow control devices, production nipples and production tubing strings
  • Variable flow path inflow control devices, production nipples and production tubing strings

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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 present invention proposes a variable channel type inflow control device, an oil production nipple and a production pipe string. The inflow control device includes: an upper valve body with a flow channel inlet; a lower valve body with an upper valve body Body connected and formed with a cavity, the lower valve body is provided with a flow channel outlet; and a floating plate, which is set in the cavity between the upper valve body and the lower valve body, the viscosity of the fluid flowing in from the flow channel inlet The size automatically adjusts the upper and lower positions of the floating disc, thereby adjusting the flow rate of the fluid flowing through the channel. The inflow control device can automatically adjust the size of the flow channel according to different fluid properties, so as to achieve the purpose of stabilizing oil and controlling water / gas.

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 Patents(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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