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Special alloy having functions of inhibiting separation and agglomeration of wax in liquid

A kind of alloy and special technology, which is applied in the field of metal functional materials, can solve the problems of chemical substance discharge, pollute the environment, affect the production efficiency of crude oil, etc., achieve the effect of reducing the amount of precipitation, reducing the rate of precipitation, and avoiding discharge

Inactive Publication Date: 2012-11-28
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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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, which is 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 crude oil production. efficiency and pollution

Method used

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  • Special alloy having functions of inhibiting separation and agglomeration of wax in liquid
  • Special alloy having functions of inhibiting separation and agglomeration of wax in liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Demonstration of the function of inhibiting the precipitation of paraffin in diesel oil, the weight percentage of the alloy composition is shown in Table 1:

[0024] Table 1 Alloy composition weight percentage (%)

[0025] Ni Cu Zn sn Pb co Gd Ti B 23.3 54.7 15.1 1.3 3.1 1.4 0.5 0.5 0.10

[0026] After melting the alloy in a vacuum induction furnace under the protection of Ar gas, the alloy powder was taken. Put 0# diesel oil and paraffin in two petri dishes, and put alloy particles in one of them. Then put them into a constant temperature box at 60°C until the paraffin is completely dissolved, take it out and observe the precipitation of paraffin with temperature. Visible: Petri dish without alloy ( figure 1 In the petri dish on the left in the middle), the paraffin wax precipitates faster, the amount is large, and the precipitates are relatively coarse, while in the petri dish with alloys, the paraffin wax precipitates late...

Embodiment 2

[0029] Demonstration of the function of inhibiting the precipitation of paraffin in water, the weight percentage of the alloy composition is shown in Table 2:

[0030] Table 2 Alloy composition weight percentage (%)

[0031] Ni Cu Zn sn Pb co La+Ce 18.5 65.7 7.8 3.8 1.5 2.0 0.7

[0032] After melting the alloy in a vacuum induction furnace under the protection of Ar gas, the alloy powder was taken. Put water and paraffin in two Petri dishes, and put alloy particles in one of them. Then put them into a thermostat at 100°C until the paraffin is completely dissolved, take it out and observe the precipitation of paraffin with temperature. Visible: Petri dish without alloy ( figure 2 In the petri dish on the left side of the center), the paraffin wax precipitates very quickly and forms a film, and the amount is large, while in the petri dish with alloys, the paraffin wax precipitates later, with a small amount and is more dispersed (see fig...

Embodiment 3

[0035] The effect of oilfield downhole wax-proof tools made of special wax-proof alloys on the oil well flushing cycle, the weight percentage of alloy composition is shown in Table 3:

[0036] Table 3 Alloy composition weight percentage (%)

[0037] Ni Cu Zn sn Pb co La+Nd Ti B 14.6 45.9 27.0 5.6 3.5 1.4 1.0 0.9 0.10

[0038] The vacuum induction furnace is used to melt the alloy in a vacuum state, and the Ar gas is filled before adding the low melting point metal. After pouring, it is made into a porous pipe, which is installed 10 meters below the oil well pump. The depth of the oil well is 1900 meters. Using electric heating to remove wax, the wax removal cycle is 40 days, and the wax removal cycle is extended to 254 days after using alloy tools, and the wax prevention effect is remarkable.

[0039]

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Abstract

An object of the invention is to provide a novel special alloy having functions of inhibiting separation and agglomeration of wax in wax-containing liquid. The alloy has special electrochemical activities when being contacted with the wax-containing liquid, can effectively inhibit separation, precipitation and agglomeration of the wax and some other components in the liquid, and can be used for wax removal and prevention treatment.

Description

technical field [0001] The invention relates to metal functional materials, and in particular provides a new type of special alloy with the function of inhibiting the precipitation and agglomeration of wax in waxy liquid. 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 stopped, and the solidified wax must be removed by "well flushing" to continue oil pumping. Wax removal and prevention have become an important technical link in crude oil production. The most commonly used method of well cleaning is thermal washing or chemical paraff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/06C22C9/04C22C1/02
Inventor 吕曼棋张海峰胡壮麒
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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