Polymeric chemical blocking remover

A plug-removing agent and polymer technology, applied in the field of chemical plug-removing agents, can solve the problems of poor water solubility, unfavorable field application, poor stability, etc., and achieve the effect of good stability, easy storage and transportation

Inactive Publication Date: 2016-01-06
CHINA PETROLEUM & CHEM CORP +1
18 Cites 17 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems existing in the prior art, such as the poor stability and unsafeness of the deblocking products using oxidants such as hydrogen peroxide and chlorine dioxide, and the poor water solubility of solid oxidants su...
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Abstract

The invention provides a polymeric chemical blocking remover which is prepared from the following raw materials in parts by mass: 1.5-5 parts of a solid oxidizing agent, 0.5-2.5 parts of a catalyst, 0-1 part of a strippant, 0-1 part of a penetrating agent, 0-1 part of a ferric ion stabilizer and 2-5 parts of a corrosion inhibitor, wherein the solid oxidizing agent is urea peroxide; the catalyst is formic acid, acetic acid, citric acid, hydrochloric acid, oxalic acid, sulfamic acid and various substituents, Na2CO3, NaOH, sodium sulfite, sodium hydrogen sulfite, formaldehyde or thiourea; the strippant is urea, PEG-400 or ethanol amine; the penetrating agent is a nonionic surfactant; the nonionic surfactant is fatty alcohol-polyoxyethylene ether; the ferric ion stabilizer is citric acid, acetic acid, nitrilotriacetic acid or ethylene diamine tetra acetic acid; and the corrosion inhibitor is formaldehyde, acetaldehyde, benzaldehyde, butanedial or glutaraldehyde.

Application Domain

Drilling composition

Technology Topic

Nitrilotriacetic acidBenzaldehyde +26

Image

  • Polymeric chemical blocking remover
  • Polymeric chemical blocking remover
  • Polymeric chemical blocking remover

Examples

  • Experimental program(54)

Example Embodiment

[0030] Example 1:
[0031] Take 1.5 parts by mass of urea peroxide and mix with 2.5 parts by mass of formic acid and 2 parts by mass of formaldehyde to obtain a polymer chemical blocking remover product. At the time of use, 84 parts by mass of water was added to prepare an aqueous solution.

Example Embodiment

[0032] Example 2:
[0033] Take 5 parts by mass of urea peroxide and mix with 0.5 parts by mass of formic acid and 5 parts by mass of formaldehyde to obtain a polymer chemical blocking agent product. At the time of use, 96 parts by mass of water was added to prepare an aqueous solution.

Example Embodiment

[0034] Example 3:
[0035] Take 3 parts by mass of urea peroxide and mix with 1.5 parts by mass of formic acid and 3.5 parts by mass of formaldehyde to obtain a polymer chemical blocking agent product. In use, 90 parts by mass of water was added to prepare an aqueous solution.

PUM

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Description & Claims & Application Information

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