Efficient sulfur solving agent for sulfur deposits in sulfur-containing gas well

A technology of depositing sulfur and sulfur dissolving agent, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of high cost, small amount of dissolved sulfur, and slow speed of dissolving sulfur, and achieve low cost and high dissolved sulfur Large, fast sulfur dissolving effect

Inactive Publication Date: 2012-04-11
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, amines, carbon disulfide, n-heptane, toluene, spindle oil, alkanes, aromatics, N-methyldiethanolamine, diethanolamine, N,N-dimethylacetamide, methanol, etc. also have a certain ability to dissolve sulfur. However, at 30°C, the amount of sulfur dissolved in 1g of sulfur dissolving agent cannot exceed 0.3g. The amount of sulfur dissolved is small, the speed of dissolving sulfur is slow, the dosage is large, and the cost is high.

Method used

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  • Efficient sulfur solving agent for sulfur deposits in sulfur-containing gas well
  • Efficient sulfur solving agent for sulfur deposits in sulfur-containing gas well
  • Efficient sulfur solving agent for sulfur deposits in sulfur-containing gas well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] First configure the aqueous sodium hydroxide solution, dissolve 3g of sodium hydroxide in 10g of water, after the sodium hydroxide is completely dissolved, add 0.08g of sodium hydrosulfide, and after it is completely dissolved, add 10g of dimethyl disulfide, 0.5 g N, N-dimethylformamide to obtain a sulfur-dissolving agent. At 25, 30, 40, 50, 60, 70, 80, and 90°C, the experiment of dissolving sublimated sulfur powder was carried out, and the results are shown in figure 1 . At 25, 30, 40, 50, 60, 70, 80, and 90°C, half of the maximum amount of sulfur dissolved at each temperature was dissolved, and the sulfur dissolution time experiment was carried out. see results figure 2 .

[0046] Experimental method and steps:

[0047] The experiment was carried out at a pressure of 1 atm and a certain temperature. Set the mass to M 0 The sublimated sulfur powder is added to the sulfur-dissolving agent with a mass of M, and the stirrer rotates at a speed of 280r / min. After ful...

Embodiment 2

[0049] First configure the sodium hydroxide aqueous solution, dissolve 10g of sodium hydroxide in 25g of water, after the sodium hydroxide is completely dissolved, add 0.2g of sodium hydrosulfide, and then add 10g of dimethyl disulfide, 1.5 g N, N-dimethylformamide to obtain a sulfur-dissolving agent. At 25, 30, 40, 50, 60, 70, 80, and 90°C, the experiment of dissolving sublimated sulfur powder was carried out, and the results are shown in image 3 . At 25, 30, 40, 50, 60, 70, 80, and 90°C, half of the maximum amount of sulfur dissolved at each temperature was dissolved, and the sulfur dissolution time experiment was carried out. see results Figure 4 .

[0050] The experimental method and steps are the same as in Example 1.

Embodiment 3

[0052] First configure the aqueous sodium hydroxide solution, dissolve 2.5g of sodium hydroxide in 7g of water, after the sodium hydroxide is completely dissolved, add 0.06g of sodium hydrogen sulfide, and then add 10g of dimethyl disulfide, 0.6 g of N,N-dimethylformamide to obtain a sulfur-dissolving agent. At 25, 30, 40, 50, 60, 70, 80, and 90°C, the experiment of dissolving sublimated sulfur powder was carried out, and the results are shown in Figure 5 . At 25, 30, 40, 50, 60, 70, 80, and 90°C, half of the maximum amount of sulfur dissolved at each temperature was dissolved, and the sulfur dissolution time experiment was carried out. see results Image 6 .

[0053] The experimental method and steps are the same as in Example 1.

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Abstract

The invention discloses an efficient sulfur solving agent for sulfur deposits in a sulfur-containing gas well, relating to the field of the sulfur solving agent. The efficient sulfur solving agent is composed of dimethyl disulfide, sodium hydroxide aqueous solution, sodium bisulfide and N, N-dimethylformamide. The efficient sulfur solving agent is high in sulfur solving capability, high in sulfur solving speed and low in cost, and thereby can be widely applied to sulfur solving of sulfur deposits in the well tube of a high sulfur-containing gas well and a surface pipeline. At 25 DEG C, 1 g of sulfur solving agent is capable of solving 1.62 g of sulfur and the time of solving is only 2.27 min; therefore, the sulfur solving effect of the efficient sulfur solving agent is obviously superior to that of the sulfur solving agent in the prior art.

Description

technical field [0001] The invention relates to a sulfur dissolving agent, in particular to an efficient sulfur dissolving agent used for depositing sulfur in sour gas wells. Background technique [0002] With the development of high-sulfur gas fields, the problem of sulfur deposition has become increasingly prominent. The harm of sulfur deposition is not only manifested in clogging formations, reducing permeability, causing a sharp drop in gas well productivity, and forcing gas wells to reduce production or stop production. More importantly, once a "sulfur blockage" is formed in the production manifold, the manifold will be damaged due to corrosion, pressure suppression, etc., resulting in the escape of sulfur-containing gases, posing a serious threat to the safety of people's lives and property. At present, sulfur deposition is very serious in the wellbore of high-sulfur gas wells and surface pipelines. [0003] In 1970, Fisher first proposed dialkyl disulfide (Merox) as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/532
Inventor 刘建仪刘敬平
Owner SOUTHWEST PETROLEUM UNIV
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