| 摘要 |
<p>New compositions are disclosed that are useful for the prevention of sludge or emulsions during the drilling or workover of producing oil wells. These compositions are comprised of a N,N-dialkylamide of a fatty acid, a hydrocarbon solvent for petroleum and a mutual oil/water solvent. Also taught and claimed is a method of preventing such sludge or emulsion formation or of breaking the same after it is formed.</p> |
