Earth boring – well treating – and oil field chemistry – Preventing contaminant deposits in petroleum oil conduits
Reexamination Certificate
2011-03-08
2011-03-08
Kugel, Timothy J. (Department: 1765)
Earth boring, well treating, and oil field chemistry
Preventing contaminant deposits in petroleum oil conduits
C166S304000, C166S305100, C166S307000, C166S308100, C166S308200, C166S311000, C166S312000, C507S268000, C507S269000, C507S277000, C507S922000, C507S923000, C507S927000
Reexamination Certificate
active
07902124
ABSTRACT:
A method of treating a subterranean formation penetrated by a wellbore of a well having iron-containing components is carried out by introducing a treatment fluid into the wellbore of the well. The treatment fluid is formed from an aqueous solution, a mineral acid, a viscoelastic surfactant gelling agent and corrosion inhibitor system containing at least one of an alkyl, alkenyl, alicyclic or aromatic substituted aliphatic ketone and aliphatic or aromatic aldehyde. The treatment fluid is substantially free of any formic acid or precursor formic acid. In certain embodiments, the corrosion inhibitor system comprises a mixture of at least one of an alkenyl phenone or α,β-unsaturated aldehyde, an unsaturated ketone or unsaturated aldehyde other than the alkenyl phenone and α,β-unsaturated aldehyde, a dispersing agent, an extender and an alcohol solvent. A corrosion inhibitor intensifier may also be used in certain embodiments, which may include a mixture of cuprous iodide and cuprous chloride.
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Ali Syed
Auzerais Francois M.
Reyes Javier Sanchez
Samuel Mathew M.
Cate David
Kugel Timothy J.
Nava Robin
Rzaniak Martin
Schlumberger Technology Corporation
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