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Special alloy with function of paraffin inhibition and application thereof

A special and alloy technology, applied in the direction of metal material coating process, fusion spraying, coating, etc.

Active Publication Date: 2012-10-10
NAIR ENERGY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most commonly used method of well cleaning is thermal washing or chemical paraffin removal. The above methods are effective, but the oil production operation must be stopped and drained for several days before the oil pumping operation can be restarted. At the same time, a large amount of chemical substances are discharged, which seriously affects the Crude oil production efficiency, but also pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A special alloy with anti-wax function. The composition of the alloy is shown in the following table (wt%):

[0017] Cu Ni co Gd 88.0 10.5 1.0 0.5

[0018] The specific preparation method is as follows: use a vacuum induction furnace to melt under normal pressure, use normal pressure casting, and make a φ2 wire after forging, rolling, and drawing; The inner and outer surfaces of the inner cylinder and the inner surface of the outer cylinder are sprayed with alloy by flame spraying, with a thickness of 22 microns. After the crude oil flows into the inner cylinder, it is injected into the outer cylinder and enters the oil pumping pipeline. During this period, the crude oil and the surface layer of the alloy fully interact.

[0019] The depth of the oil well is 1100 meters, the fluid production rate of the oil well is 5.8 tons / day, the oil production rate is 2.3 tons / day, the water content is 60%, and the wax content is 14.5%. The wax removal c...

Embodiment 2

[0021] A special alloy with anti-wax function. The composition of the alloy is shown in the following table (wt%):

[0022] Cu Ni co Ti Pr+Nd B 71.0 25.4 2.8 0.3 0.4 0.1

[0023] The specific preparation method is as follows: use vacuum induction furnace to melt under vacuum, adopt vacuum casting, and make φ2 wire after forging, rolling, and wire drawing; use stainless steel to make anti-wax tools, and the anti-wax tools are composed of porous inner cylinder and The non-porous outer cylinder is combined, and the alloy is sprayed on the inner surface and outer surface of the inner cylinder and the inner surface of the outer cylinder by flame spraying, with a thickness of 16 microns. After the crude oil flows into the inner cylinder, it is injected into the outer cylinder and enters the oil pumping pipeline. During this period, the crude oil and the surface layer of the alloy fully interact.

[0024] The depth of the oil well is about 1500 meters...

Embodiment 3

[0026] A special alloy with anti-wax function. The composition of the alloy is shown in the following table (wt%):

[0027] Cu Ni co Ti La+Ce 91.0 7.0 1.1 0.4 0.5

[0028] The specific preparation method is as follows: melting in a vacuum induction furnace under the protection of Ar gas, casting at normal pressure, and crushing to become a master alloy. Micron-sized alloy powder is made by atomizing equipment. The anti-wax tool is made of stainless steel. The anti-wax tool is composed of a porous inner cylinder and a non-porous outer cylinder. The alloy powder is sprayed on the inner surface and outer surface of the inner cylinder and the inner surface of the outer cylinder by plasma spraying, with a thickness of 19 Microns. After the crude oil flows into the inner cylinder, it is injected into the outer cylinder and enters the oil pumping pipeline. During this period, the crude oil and the surface layer of the alloy fully interact.

[0029] ...

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Abstract

A special alloy with a function of paraffin inhibition is characterized in that the special alloy contains the following elements of: by weight, 65-95% of Cu, 3-30% of Ni, 1.0-5.0% of Co and 0.1-0.5% of RE, wherein RE is rare earth element. With the application of the special alloy in crude oil production wax inhibitor / removal technology, crude oil production efficiency is not only raised, but pollution caused by hot washing / chemistry-flushing well is also avoided. Therefore, the special alloy has obvious social and economic values. The paraffin inhibition special alloy is a novel functional material and has a good subject research value and a development prospect for the research on interaction effect of a metal material and a liquid and the development of a novel functional material by its electrocatalysis effect of crude oil composition and a special function of changing wax deposition agglomeration behavior.

Description

technical field [0001] The invention relates to the field of metal materials, and in particular provides a special alloy with wax-repelling function and its application. Background technique [0002] Crude oil generally contains wax, and there are many oil fields with high wax content in my country. During the oil production operation, the temperature of the crude oil is continuously lowered during the process from the underground to the surface, and the wax in the crude oil will precipitate and condense on the sucker rod and the pipe wall after the temperature reaches the wax precipitation point (generally around 40°C). As a result, the oil pumping operation is stopped, and the solidified wax must be removed by "well flushing" to continue oil pumping. Therefore, wax removal and prevention has become an important technical link in crude oil production. The most commonly used method of well cleaning is thermal washing or chemical paraffin removal. The above methods are effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/06C23C4/08C23C4/134
Inventor 吕曼棋张海峰胡壮麒
Owner NAIR ENERGY EQUIP
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