logo

For the Inventor, By the Inventor

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 12644040 B1

PDFFull Text
Date of Patent:
Jun. 02, 2026

Filed:

Nov. 25, 2024

Downhole methods and compositions used in such

Applicant:

Dorf Ketal Chemicals Fze, Fujairah, AE;

Inventors:

Tom Mcloughlin, Foothills, CA;

Steven Scott Mann, Okotoks, CA;

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 41/02 (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 43/119 (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

A method of the invention prepares a hydrocarbon-bearing formation for stimulation. A bottom hole assembly comprising a plug and a perforation tool connected to a wireline is lowered into a wellbore having a casing. An acidic composition is injected into the wellbore; wherein a spacer separates the acidic composition from said bottom hole assembly, but the acidic composition is in direct contact with both the wireline and casing. The spacer may be existing water in the wellbore or water injected into the wellbore. The plug is positioned downhole beyond a location where a first perforation area is to be made in the casing. The perforation tool is activated creating the first perforation area. The acid then contacts the first perforation area and cementitious debris generated from the casing being perforated. The perforation tool next moved up-hole to a second location and the casing is again perforated to create a second perforation area. The acid also contacts the second perforated area and cementitious debris generated from the perforated casing. The perforation tool is lastly removed from the wellbore.

Find Patent Forward Citations

Loading…