US 12,146,400 B2
Method and downhole apparatus to accelerate wormhole initiation and propagation during matrix acidizing of a subterranean rock formation
Ziad Sidaoui, Dhahran (SA); and Mustapha Abbad, Al-Khobar (SA)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on May 19, 2023, as Appl. No. 18/320,424.
Application 18/320,424 is a continuation of application No. 17/233,927, filed on Apr. 19, 2021, granted, now 11,692,425.
Claims priority of provisional application 63/060,688, filed on Aug. 4, 2020.
Prior Publication US 2023/0304386 A1, Sep. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. E21B 43/27 (2006.01); E21B 33/124 (2006.01); E21B 41/00 (2006.01)
CPC E21B 43/27 (2020.05) [E21B 41/0078 (2013.01); E21B 33/124 (2013.01)] 18 Claims
OG exemplary drawing
 
11. A downhole tool configured to be deployed at a treatment zone of a wellbore, the downhole tool comprising:
a channel for supplying a stimulating fluid to the treatment zone;
two or more nozzle structures configured to create at least one notch in a surface of the wellbore at the treatment zone; and
two or more arms including respective internal passageways that are in fluid communication with a respective nozzle structure of the two or more nozzle structures and the channel; and
wherein the downhole tool is configured to supply the stimulating fluid to the treatment zone at a pressure less than formation breakdown pressure, wherein the notch facilitates wormhole formation at a corresponding position of the notch arising from dissolution of rock caused by reaction of the rock with the stimulating fluid.