Oil well sand control screen pipe and preparation method

A technology for sand control screens and oil wells, used in earth-moving drilling, wellbore/well components, coatings, etc. The effect of low application conditions and increased liquid production

Active Publication Date: 2021-04-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the oil well sand control screen in the prior art, polymers, crude oil clay and other substances are adsorbed and accumulated on the surface of the screen to block the gap channel, thus affecting the sand control screen In order to solve the problem of pipe liquid production capacity, the present invention provides an oil well sand control screen and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 100 g of methyltriethoxy silicone oil, 35 g of aminopropylmethyldimethoxysilane, and 1 g of ethanol were added to 1 kg of cyclohexane and mixed uniformly to prepare coating treatment solution 1a.

[0035] The sand control screen was soaked in the treatment solution 1a for 5 minutes, then controlled to dry, and cured in an oven at 80°C for 5 hours to obtain a coated screen with a coating thickness of 15 μm.

[0036] After testing, the coated sand control screen was soaked in a mixed aqueous solution containing 3% montmorillonite and 0.2% polyacrylamide. The results showed that the surface of the treated sand control screen was not easy to be attached by sediment particles and had Good anti-clogging ability.

Embodiment 2

[0038] 340 g of methyl hydroxy silicone oil (hydroxyl content 5%), 35 g of aminoethylaminopropylmethyldimethoxysilane, and 11 g of methanol were added to 1 kg of octane and mixed uniformly to prepare coating treatment solution 2a.

[0039] The treatment solution 2a was sprayed on the surface of the sand control screen, and cured in an oven at 120° C. for 4 hours to obtain a coated screen with a coating thickness of 45 μm.

[0040] After testing, the coated sand control screen was soaked in a mixed aqueous solution containing 3% montmorillonite and 0.2% polyacrylamide. The results showed that the surface of the treated sand control screen was not easy to be attached by sediment particles and had Good anti-clogging ability.

Embodiment 3

[0042] 350 g of methyl hydroxy silicone oil (hydroxyl content 1.5%), 45 g of aminopropyltriethoxysilane, and 10 g of methanol were added to 1 kg of n-hexane and mixed uniformly to prepare coating treatment solution 3a.

[0043] After immersing the sand control screen in the treatment solution 3a for 4 minutes, it was controlled to dry, and cured in an oven at 60° C. for 5 hours to obtain a coated screen. , the coating thickness is 50 μm.

[0044] After testing, the coated sand control screen was soaked in a mixed aqueous solution containing 3% montmorillonite and 0.2% polyacrylamide. The results showed that the surface of the treated sand control screen was not easy to be attached by sediment particles and had Good anti-clogging ability.

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PUM

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Abstract

The invention discloses an oil well sand control screen pipe and a preparation method. The sand control screen pipe comprises a pipe body and a coating, wherein the coating is prepared by soaking, brushing or spraying a coating treatment solution on the pipe body; the coating treatment solution is prepared from an organosilicon compound, a silane coupling agent, a cosolvent and a solvent; and based on the weight of the solvent being 100%, the content of the organosilicon compound is 0.1-50%, the content of the silane coupling agent is 0.1-30%, and the content of the cosolvent is 0.1-10%. The sand control screen pipe can reduce adsorption of substances such as polymers, crude oil and clay on the surface of the screen pipe, improves the flow conductivity of the screen pipe, and is simple in formula, low in field application condition, low in construction cost and long in lasting effect.

Description

technical field [0001] The invention relates to the technical field of crude oil development, in particular to an oil well sand control screen and a preparation method. Background technique [0002] Petroleum is an important natural resource and national strategic material. With the development of social economy, the demand for crude oil is also increasing. In order to improve oil and gas recovery, people have developed a variety of oil displacement technologies, such as using polymer profile control to expand the swept volume; using surfactant flooding to increase oil washing capacity; The integrated application of technology has greatly improved the efficiency of crude oil development. [0003] But at the same time, there will be many problems in the process of oil field development. Sand production in oil wells is one of the main problems in the process of oil and gas production. Sand production problems exist widely in the production of various oil fields at home and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/08B05D7/24
Inventor 沈少春李应成沙鸥张卫东
Owner CHINA PETROLEUM & CHEM CORP
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