High efficient composite desulfurization corrosion inhibitor and preparation method thereof

A corrosion inhibitor and high-efficiency technology, applied in chemical instruments and methods, earthwork drilling, drilling compositions, etc., can solve problems such as affecting the production of oil and gas wells, blocking oil and gas passages, etc., achieving good compatibility and little impact on performance. , The effect of fast desulphurization reaction

Inactive Publication Date: 2018-04-10
SICHUAN ZHENGRONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the alkaline desulfurizers currently used in oilfields need to add more desulfurizers to reach the 2ppm standard, and the interaction betw

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] A high-efficiency desulfurization and corrosion inhibitor

[0069] Add 22kg of ferrous gluconate, 18kg of ferrous sulfate, 30kg of zinc oxide, and 10kg of stearylamide into a mixer, stir and mix for 1 hour, and then discharge and pack.

Embodiment 2

[0071] A high-efficiency desulfurization and corrosion inhibitor

[0072] Add 18kg of ferrous gluconate, 16kg of ferrous sulfate, 28kg of zinc oxide, and 8kg of stearamide into a mixer, stir and mix for 1 hour, and then discharge and pack.

Embodiment 3

[0074] A high-efficiency desulfurization and corrosion inhibitor

[0075] Add 24kg of ferrous gluconate, 20kg of ferrous sulfate, 32kg of zinc oxide, and 12kg of stearamide into a mixer, stir and mix for 1 hour, and then discharge and pack.

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PUM

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Abstract

The invention discloses a high efficient composite desulfurization corrosion inhibitor and a preparation method thereof. The desulfurization corrosion inhibitor is prepared from the following components in parts by weight: 22 parts of ferrous gluconate, 18 parts of ferrous sulfate, 30 parts of zinc oxide, and 10 parts of stearamide. The desulfurization corrosion inhibitor can be highly dissolved in a water based drilling fluid; when the pH value is 12, precipitation is difficult to happen; and when the pH value of a drilling fluid system is 9-10 and the temperature is 70 DEG C, the desulfurization rate can reach 99.4%. At the same time, divalent iron ions can be easily absorbed by the organic substances, the formed complex, drilling fluid containing iron ion filtrate, or the drilling cuttings will not pollute the environment, and the content of H2S in crude oil and natural gas is reduced effectively.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a method for removing the wet H-containing gas contained in the downhole formation during the drilling process. 2 S, CO 2 An iron-based zinc-based mixed desulfurization and corrosion inhibitor added to drilling fluid and a preparation method thereof. Background technique [0002] According to statistics, the national average loss of drill pipe is 4kg per 1 meter of drilling, and 75%-95% of the loss of drill pipe is caused by corrosion. The corrosion rate of drill pipe in Hanliu gas field in Sichuan is 1.3-2.6mm / a, seriously even exceeding 3.9mm / a, the H present in the drilling fluid 2 S is a serious threat to drilling technology. h 2 S is a highly toxic substance. When the concentration in the atmosphere exceeds 20 parts per million, people cannot work normally. h 2 The intrusion of S into the completion fluid will cause serious corrosion to the downhole pipe string. ...

Claims

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Application Information

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IPC IPC(8): C09K8/54C09K8/03
Inventor 王刚毅黄明松
Owner SICHUAN ZHENGRONG IND
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