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Inflow-control and sand-prevention device

A technology for sand control and sand control pipe, which is applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems of lengthening the length of the downhole pipe string, time-consuming and laborious, complicated procedures, etc. High-strength, easy-to-operate effect

Inactive Publication Date: 2017-09-08
CHENGDU CHUANTONGDA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires separate design and production of sand control devices and flow control devices, which is time-consuming and laborious, and requires assembly during use, the process is complicated, and the length of the downhole string will be lengthened, which is very inconvenient

Method used

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  • Inflow-control and sand-prevention device
  • Inflow-control and sand-prevention device

Examples

Experimental program
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Effect test

Embodiment

[0026] The structure of a flow control and sand control device of the present invention is as follows: figure 1 , figure 2 As shown, it includes a base pipe 2 and a wire-wound sand control pipe, wherein the two ends of the base pipe 2 are connected to the oil pipe through the connecting thread 1, and the base pipe 2 is provided with a flow hole 4, and the flow hole 4 is embedded with radial The overflow ring 5 which expands with water, and the base pipe 2 are wrapped with silk sand control pipes. It has a device that integrates the inflow control device with the sand control screen, and can automatically adjust the flow resistance level according to the water output of the oil layer. While controlling sand, it can ensure a uniform inflow profile in the horizontal wellbore, reduce gas-water coning, and improve oil well recovery.

[0027] Such as figure 2 , Figure 4 , Image 6 As shown, the water-swellable flow ring 5 is embedded in the flow hole and is in close contact w...

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Abstract

The invention discloses an inflow-control and sand-prevention device which mainly solves the problems that when an oil-gas well is mined, sand and water are produced, and especially in the middle and later mining periods, the recovery efficiency is seriously affected. The device comprises a punching base pipe and a wire-winding sand-prevention pipe, wherein the two ends of the base pipe are connected with oil pipes through connection threads, overflowing holes are formed in the base pipe, overflowing rings capable of being radially expanded when meeting water are embedded into the overflowing holes, and the wire-winding sand-prevention pipe is wrapped around the base pipe. The flow-control and sand-prevention device has the advantages that an inflow-control device and a sand-prevention screen pipe are integrated, the flow resistance level can be automatically adjusted according to the oil-layer water yield, it is ensured that the inflow profile of a horizontal wellbore is uniform while the sand is prevented while, gas and water coning is reduced, and the recovery efficiency of an oil well is improved, and the flow-control and sand-prevention device is very high in practical value and popularization value.

Description

technical field [0001] The invention relates to the field of flow control and sand prevention completion equipment for oil and gas wells, in particular to a flow control and sand prevention device. Background technique [0002] Most of the oil and gas reservoirs in the world have entered the middle and late stage of development, and the problem of sand and water production is common in the development process. Especially in long horizontal wells, due to the "heel-toe effect" and / or the influence of reservoir heterogeneity, the uneven production profile causes premature water breakthrough. Once coning occurs, the oil well production will be significantly reduced and a large amount of sand will be produced. Similarly, sand production has a huge impact on the exploitation of oil and gas reservoirs, mainly causing oil and gas wells to reduce production or even stop production; aggravating the wear and tear of downhole equipment and surface equipment; for such problems, the comb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/08E21B43/32
CPCE21B43/08E21B43/088E21B43/32
Inventor 韩群芳
Owner CHENGDU CHUANTONGDA TECH CO LTD
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