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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12497557 B1

PDFFull Text
Date of Patent:
Dec. 16, 2025

Filed:

Feb. 21, 2024

Methods for stimulating a hydrocarbon-bearing formation by perforating a wellbore and introducing an acidic composition in the wellbore

Applicant:

Dorf Ketal Chemicals Fze, Fujairah, AE;

Inventors:

Clay Purdy, Medicine Hat, CA;

Markus Weissenberger, Calgary, CA;

Assignee:

DORF KETAL CHEMICALS FZE, Fujairah, AE;

Attorney:

Berg Hill Greenleaf Ruscitti LLP

Primary Examiner:

Silvana C Runyan

Int. Cl.
CPC ...
E21B 43/119 (2006.01); C09K 8/03 (2006.01); C09K 8/06 (2006.01); C09K 8/42 (2006.01); C09K 8/46 (2006.01); C09K 8/54 (2006.01); C09K 8/60 (2006.01); C09K 8/74 (2006.01); C23F 11/04 (2006.01); E21B 21/00 (2006.01); E21B 41/02 (2006.01); E21B 43/26 (2006.01); E21B 43/27 (2006.01); E21B 43/28 (2006.01); E21B 33/12 (2006.01); E21B 43/116 (2006.01);
U.S. Cl.
CPC ...
C09K 8/74 (2013.01); C09K 8/032 (2013.01); C09K 8/06 (2013.01); C09K 8/426 (2013.01); C09K 8/46 (2013.01); C09K 8/54 (2013.01); C09K 8/602 (2013.01); C23F 11/04 (2013.01); E21B 21/00 (2013.01); E21B 41/02 (2013.01); E21B 43/119 (2013.01); E21B 43/26 (2013.01); E21B 43/27 (2020.05); E21B 43/283 (2013.01); C09K 2208/32 (2013.01); E21B 33/12 (2013.01); E21B 43/116 (2013.01);
Abstract

The invention includes methods for stimulating a hydrocarbon-bearing formation by perforating a wellbore and introducing an acidic composition in the wellbore. A preferred embodiment includes inserting an isolation plug in the wellbore at a predetermined location followed by inserting a perforating tool and a breakdown acid into the wellbore. The wellbore is perforated by the tool to create a perforated area. The breakdown acid is allowed to come into contact with the perforated area for a predetermined period of time sufficient to prepare the formation for stimulation. The tool is then removed from the wellbore wherein stimulation of the perforated area is thereby initiated. Also disclosed is a corrosion inhibiting composition for use with the acidic composition.

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