A kind of hydrogen sulfide inhibitor for drilling fluid and preparation method thereof

A hydrogen sulfide and inhibitor technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems that threaten the personal safety of on-site operators and affect the smooth progress of drilling work, so as to avoid poisoning accidents and increase drilling fluid The effect of lubrication

Active Publication Date: 2021-01-15
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when encountering formations containing hydrogen sulfide during drilling, it is inevitable that hydrogen sulfide will return to the ground along with the drilling fluid, and the released hydrogen sulfide gas will directly threaten the personal safety of on-site operators, thus affecting the smooth progress of drilling work

Method used

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  • A kind of hydrogen sulfide inhibitor for drilling fluid and preparation method thereof
  • A kind of hydrogen sulfide inhibitor for drilling fluid and preparation method thereof
  • A kind of hydrogen sulfide inhibitor for drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 3 g of sodium hydroxide to 50 mL of ethanolamine solution with a mass fraction of 40%, stir at room temperature for 5 min, add 1.78 g of carboxymethyl cellulose and 1.55 g of β-cyclodextrin, continue stirring for 5 min, add 3.15 g of pentaerythritol oxypropane ether, and increase the speed to 800rpm, after 2min, add 100mL of liquid paraffin, stir at 40°C for 24h, and filter to obtain a wet bulb (see attached figure 1 ), vacuum-dried at 35°C for 24 hours to obtain 4.21 g of ethanolamine-doped cellulose / cyclodextrin microspheres with a particle size of 200 μm (see attached figure 2 ).

Embodiment 2

[0024] As in Example 1, the stirring speed was increased to 1200 rpm to obtain 3.87 g of 100 μm ethanolamine-doped cellulose / cyclodextrin microspheres.

Embodiment 3

[0026] As in Example 2, 150 mL of liquid paraffin was added to obtain 3.02 g of 80 μm ethanolamine-doped cellulose / cyclodextrin microspheres.

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Abstract

The invention discloses a hydrogen sulfide inhibitor for drilling fluid and a preparation method of the hydrogen sulfide inhibitor. The hydrogen sulfide inhibitor is ethanolamine doped cellulose / cyclodextrin microspheres, and the hydrogen sulfide inhibitor is specifically obtained by stirring and cross-linking reaction of cellulose and cyclodextrin under an alkaline condition at the temperature of30-50 DEG C. The preparation method disclosed by the invention is mild, the prepared hydrogen sulfide inhibitor can be used for strengthening the performance of the drilling fluid and guaranteeing the safety when the water-based drilling fluid is used for drilling a sulfur-containing stratum; the hydrogen sulfide inhibitor has the effects of constraining hydrogen sulfide and lubricating the drilling fluid, so that the accident that an operator is poisoned due to release of hydrogen sulfide when the drilling fluid carrying drilling cuttings returns to the ground due to the fact that the drilling fluid contains hydrogen sulfide is avoided.

Description

technical field [0001] The invention relates to the technical field of hydrogen sulfide inhibitors, in particular to a hydrogen sulfide inhibitor for drilling fluid and a preparation method thereof. Background technique [0002] Drilling fluid is a necessary functional fluid in the drilling process of petroleum, natural gas and coal mining industries. Even in the utilization of geothermal, hot spring and dry hot rock, drilling fluid drilling is also used. However, when encountering formations containing hydrogen sulfide during drilling, it is inevitable that hydrogen sulfide will return to the ground along with the drilling fluid, and the released hydrogen sulfide gas will directly threaten the personal safety of on-site operators, thus affecting the smooth progress of drilling work. Contents of the invention [0003] In view of the above problems, the present invention aims to provide a kind of hydrogen sulfide inhibitor for drilling fluid and its preparation method. Addi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C09K8/528C08J3/24C08J3/12C08L1/28C08L5/16
CPCC08J3/12C08J3/246C08J2301/28C08J2405/16C09K8/035C09K8/532C09K2208/20
Inventor 刘显斌邹长军
Owner SOUTHWEST PETROLEUM UNIV
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