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A soluble antiscale wax control ball

A soluble and anti-wax technology, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of heavy workload, affecting the operation safety of gathering and transportation pipelines, and increasing the back pressure of pipelines, and achieves good wax removal effect Effect

Active Publication Date: 2016-03-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the single-pipe unheated gathering and transportation process, the pipeline is generally dredged by regularly dropping rubber wax-removing balls; for pipelines with high viscosity of crude oil, serious wax deposition and fouling, the return pressure of the pipeline will easily increase due to the use of rubber wax-removing balls Or blockage, which seriously affects the safety of the gathering and transportation pipeline. Therefore, it is impossible to solve the problem of dredging the pipeline by throwing wax balls regularly
[0004] In the process of realizing the present invention, the inventor found that the prior art has at least the following problems: the current single-pipe does not heat the gathering and transportation process, and relies on the addition of rubber wax removal balls to the pipeline for wax removal. The ball can not achieve the purpose of dredging the pipeline, and it is easy to cause pipeline blockage. For pipelines with severe scaling, it can only be solved by physical descaling or replacement of pipelines. For pipelines with serious wax deposition, hot wax cleaning vehicles are used to clean and wax the pipeline. The cost is high, the workload is heavy, and the ball throwing device installed in the well group is idle

Method used

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  • A soluble antiscale wax control ball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0030] Adopt the formula ratio as shown in table 1 to manufacture TT-166 soluble anti-wax anti-fouling ball, wherein TT-166 is the inventor's own numbering to anti-wax anti-fouling ball, those skilled in the art can also adopt any other numbers. The preparation of TT-166 soluble anti-wax and anti-fouling balls is carried out according to the following steps.

[0031] 1. React in a high-temperature, high-pressure reactor at a constant temperature of 90°C for 3 hours to prepare a liquid mixed wax and scale inhibitor, neutralize and cool to room temperature to obtain wax and scale inhibitor crystals.

[0032] 2. After being dehydrated by a centrifuge, dried by a vacuum dryer, and pulverized by a pulverizer, it is ready for use.

[0033] 3. The binder will be mixed with the crushed anti-scaling agent crystal, heated and extruded to form a regular spherical body, and cooled to obtain TT-166 soluble anti-wax and anti-scaling ball.

[0034] Table 1

[0035] serial number ...

Embodiment 5-7

[0061] Examples 5-7 are the same as the method for preparing the anti-wax and anti-fouling balls described in Example 1, except for the compounding ratio. The specific compounding ratio is shown in Table 5-6.

[0062] table 5

[0063] serial number

[0064] Wherein, the weight ratio composition (A:B:C) of the compound surfactant in Table 5 is 1:1:2; the weight composition of the wax remover is shown in Table 6.

[0065] Table 6

[0066] serial number

[0067] The anti-scaling and anti-wax balls of Examples 5-7 were used to test the amount of wax deposited and the anti-wax rate. The results are shown in Table 7.

[0068] Table 7

[0069] serial number

[0070] It can be seen from Table 7 that the different ratios of EVA and LDPE affect the wax-repelling effect of the system. Wherein, the compounding dosage of fixed surfactant K is about 30%. In Table 7, the amount of the anti-wax and anti-fouling balls is 40 mg / L, and the amount of wax dep...

Embodiment 8-11

[0072] The weight compositions of Examples 8-11 are shown in Table 8.

[0073] Table 8

[0074]

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PUM

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Abstract

A soluble antiscale wax control ball is disclosed. The soluble antiscale wax control ball comprises surfactants, wax cleaning agents and an antiscale agent RX-613. The surfactants comprise sodium alkylbenzenethiosulphonate, Ninol and polyoxyethylene alkyl ether. The wax cleaning agents comprise ethylene-vinyl acetate copolymer and polyethylene. The soluble antiscale wax control ball is advantaged by being soluble and having functions of preventing scaling and wax precipitation of pipelines, being capable of not blocking pipelines, and the like. The soluble antiscale wax control ball can dissolve old scale into crude oil and can prevent crude oil components from scaling onto walls of pipelines, and therefore problems of mechanical wax-cleaning antiscale balls at present, such as pipeline blockage and high running costs, which are caused by pipeline transfiguration, and the like are overcome. Experiment research shows that the soluble antiscale wax control ball can achieve wax-cleaning effects of rubber balls in site and has multiple functions comprising chemical wax cleaning and scale prevention, the comprehensive wax cleaning rate is 85.2%, and the antiscale rate is 82.18%.

Description

technical field [0001] The invention relates to a soluble anti-scaling and anti-wax ball. Background technique [0002] Petroleum, also known as crude oil, is a viscous, dark brown liquid composed of different hydrocarbons and contains the hydrocarbon paraffin. In the process of crude oil production and pipeline transportation, with the decrease of pressure and temperature and the continuous overflow of light components, the wax in condensable crude oil begins to crystallize and precipitate, and continuously deposits in the pipe wall, which affects the pipeline transportation efficiency and seriously It will block the pipeline and stop the delivery. Therefore, it is necessary to invest a large amount of expenses every year for wax removal, and vigorously develop oilfield wax removal and prevention technology. [0003] Oilfield wax removal technology has always been valued by oil producers all over the world, and various wax removal technologies such as machinery, heat, and...

Claims

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Application Information

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IPC IPC(8): C09K8/524
Inventor 雒继忠周志平令永刚王明瑜何建军高超君姜志刚李立标杨帆贺炳成
Owner PETROCHINA CO LTD
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