Inhibiting corrosion in gas wells

Patent metadata

Field	Value
Publication number	US-11959016-B2
Application number	US-202117347952-A
Country	US
Kind code	B2
Filing date	Jun 15, 2021
Priority date	Jun 15, 2021
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

A composition for inhibiting corrosion in gas wells includes a pyrazolopyridine derivative. The pyrazolopyridine derivative includes a pyridyl moiety, a first pyrazole moiety, a second pyrazole moiety, and a phenyl moiety. The first pyrazole moiety is bound to the pyridyl moiety. The second pyrazole moiety is bound to the pyridyl moiety. The phenyl moiety is bound to the pyridyl moiety. The composition can be flowed into a wellbore formed in a subterranean formation, thereby inhibiting corrosion in the wellbore.

First claim

What is claimed is:

1. A method comprising:
flowing a composition into a wellbore formed in a subterranean formation, thereby inhibiting corrosion in the wellbore, the composition comprising a pyrazolopyridine derivative comprising:
a pyridyl moiety;
a first pyrazole moiety bound to the pyridyl moiety, the first pyrazole moiety comprising an R 2 group selected from the group consisting of an alkyl group, a thiol group, a carboxyl group, an aromatic carbonyl group, a hydroxyl group, a methyl amino group, an amide group, and an ester group;
a second pyrazole moiety bound to the pyridyl moiety, the second pyrazole moiety comprising an R 3 group selected from the group consisting of an alkyl group, an amide group, an amino group, a thiol group, a hydroxyl group, an ester group, and a carboxyl group; and
a phenyl moiety bound to the pyridyl moiety; and

producing a hydrocarbon from the subterranean formation via the wellbore.

2. The method of claim 1 , wherein the pyrazolopyridine derivative has a concentration in the composition in a range of from 100 parts per million (ppm) to 10,000 ppm.

3. The method of claim 2 , wherein the phenyl moiety further comprises an R 1 group selected from the group consisting of a methoxy group, a carboxyl group, an aromatic amide group, a thiol group, a nitrile group, an azo group, a pyridyl group, a bromophenyl group, and a sulfonic acid group.

4. The method of claim 3 , wherein the R 1 group is selected from the group consisting of methoxy, mercapto, pyridyl, (bromomethyl)pyridyl, and pyridine-2-aldoxime.

Assignees

• Saudi Arabian Oil Co
• Univ King Fahd Pet & Minerals

Inventors

• Obot Ime Bassey
• Quraishi Mumtaz A
• Sorour Ahmad A
• Chen Tao
• Wang Qiwei
• Bataweel Mohammed A
• Al-Harbi Bader Ghazi

Classifications

• C09K8/54 Primary

  Compositions for in situ inhibition of corrosion in boreholes or wells · CPC title

• C07D471/14 Primary

  Ortho-condensed systems · CPC title

• C23F11/146

  containing a multiple nitrogen-to-carbon bond · CPC title

• C23F11/149

  Heterocyclic compounds containing nitrogen as hetero atom · CPC title

• C09K2208/32

  Anticorrosion additives · CPC title