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Controlled releasing microcapsule for scale prevention, wax prevention or viscosity reduction of oil well

A slow-release microcapsule and anti-wax technology, which is applied in wellbore/well components, drilling compositions, earth-moving drilling, etc., can solve the problem of high crude oil extraction cost, high labor intensity, large investment in dosing equipment, etc. problems, to achieve the effect of maintaining the overall shape, reducing labor intensity, and strong operability

Inactive Publication Date: 2011-11-23
门正国
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting electricity bills and measures are considerable, and the cost of crude oil extraction is prohibitively high
Although the liquid dosing mode is more economical, the investment in dosing equipment is large, the later maintenance is troublesome, and the labor intensity is high

Method used

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  • Controlled releasing microcapsule for scale prevention, wax prevention or viscosity reduction of oil well
  • Controlled releasing microcapsule for scale prevention, wax prevention or viscosity reduction of oil well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 as shown, figure 1 It is a structural representation of the present invention. The invention is a slow-release microcapsule used for oil well scale prevention, wax prevention or viscosity reduction.

[0033] The sustained-release microcapsule is supported by an inorganic skeleton 3 inside, so that the density of the drug component 4 is greater than 1.0 g / cm3. It can not only maintain the overall shape of the capsule, but also not hinder the release of the pharmaceutical ingredients. The inorganic framework 3 proppant can use most of the inorganic materials that can meet the strength required by the present invention and can play the role of wax prevention, dispersion and corrosion inhibition. The inorganic skeleton components can be composed of zinc chloride, sodium silicate, sodium carbonate, sodium molybdate, sodium tripolyphosphate, sodium hexametaphosphate, etc.

[0034] The volume and shape of the present invention are solid cylindrical particl...

Embodiment 2

[0063] A slow-release microcapsule used for oil well anti-scaling, anti-wax or viscosity reduction is filled with a cross-mixed structure composed of an inorganic skeleton 3 and a pharmaceutical component 4 in a polymer composite film 2 with a surface mesh 1 things.

[0064] The volume and shape of the present invention are solid cylindrical particles with a diameter of 7mm and a height of 13mm. The addition of the inorganic skeleton 3 can maintain the shape, so that the density of the pharmaceutical component 4 is 1.3g / cm3.

[0065] A slow-release microcapsule for oil well anti-scaling, anti-wax or viscosity reduction is used as a slow-release microcapsule for oil well anti-wax.

[0066] The slow-release anti-wax microcapsule inorganic framework 3 proppant is composed of the following raw materials in parts by weight: zinc sulfate: sodium silicate: sodium carbonate = 2:3:5;

[0067] The macromolecule wrapping film compounded on the outer layer of the sustained-release microc...

Embodiment 3

[0071] A slow-release microcapsule used for oil well anti-scaling, anti-wax or viscosity reduction is filled with a cross-mixed structure composed of an inorganic skeleton 3 and a pharmaceutical component 4 in a polymer composite film 2 with a surface mesh 1 things.

[0072] The volume and shape of the present invention are solid cylindrical particles with a diameter of 8 mm and a height of 12 mm. The addition of the inorganic skeleton 3 can maintain the shape, so that the density of the pharmaceutical component 4 is 1.4 g / cm3.

[0073] A slow-release microcapsule for oil well anti-scaling, anti-wax or viscosity-reducing is used as a slow-release microcapsule for oil well anti-wax and anti-scaling purposes.

[0074] The slow-release anti-wax and anti-scaling microcapsule inorganic framework 3 proppant is composed of the following raw materials in parts by weight: zinc sulfate: sodium silicate: sodium carbonate = 2:3:5;

[0075] The polymer wrapping film compounded on the oute...

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Abstract

The invention relates to the technical field of petrochemical engineering, in particular to a controlled releasing microcapsule for scale prevention, wax prevention or viscosity reduction of an oil well. The invention discloses a solid controlled releasing microcapsule for scale and corrosion prevention in the production process of crude oil and wax prevention or viscosity reduction in the production process of the crude oil as well as a preparation method thereof. Filler comprising an inorganic framework and agent components is arranged in a macromolecule composite membrane. The controlled releasing microcapsule has a stable structure comprising an inside inorganic framework support and an outer-layer macromolecular composite membrane wrapping film, can be used for realizing the slow release of the agent and achieving the aim of maintaining the agent effective for a long term as well as the functions of corrosion inhibition and dispersion. With proper volume and density, the controlled releasing microcapsule can be prevented from being taken away by an extraction solution and can be added through a sleeve; and the controlled releasing microcapsule is simple in process and is strong in maneuverability. According to the controlled releasing microcapsule, volatile matters and harmful components which do harm to the human health are avoided; various components can be basically and slowly dissolved; the labor intensity of workers is reduced; and one-time agent addition can ensure stable operation for 30-90 days.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a slow-release microcapsule used for oil well scale prevention, wax prevention or viscosity reduction. It is a solid slow-release microcapsule used for anti-scaling and anti-corrosion of pipelines and pump bodies in the process of crude oil production, as well as for wax prevention or viscosity reduction of pipelines in the process of crude oil production, and a preparation method thereof. Background technique [0002] As my country's oilfield mining gradually enters the middle and late stages, the water content of crude oil increases year by year, and this high salinity water corrodes the oil inlet pipe wall and scales the pipe wall and pump body very seriously. [0003] Most of the currently used scale and corrosion inhibitors are in liquid state, it is inconvenient to add them continuously, and anti-freezing in winter is also a big problem, while most of the so...

Claims

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Application Information

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IPC IPC(8): C09K8/524C09K8/536C09K8/54
Inventor 门正国
Owner 门正国
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