US 12,264,567 B2
Systems and methods for multi-stage well stimulation
Chad Michael Erick Gibson, The Woodlands, TX (US); and Derek Slater Payne, Katy, TX (US)
Assigned to The WellBoss Company, Inc., Calgary (CA)
Filed by The WellBoss Company, Inc., Calgary (CA)
Filed on May 16, 2023, as Appl. No. 18/197,965.
Application 18/197,965 is a continuation of application No. 17/496,717, filed on Oct. 7, 2021, granted, now 11,692,420.
Claims priority of provisional application 63/125,024, filed on Dec. 14, 2020.
Claims priority of provisional application 63/089,631, filed on Oct. 9, 2020.
Prior Publication US 2023/0279757 A1, Sep. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. E21B 34/06 (2006.01); E21B 23/00 (2006.01); E21B 33/12 (2006.01); E21B 43/26 (2006.01)
CPC E21B 43/26 (2013.01) [E21B 23/004 (2013.01); E21B 33/12 (2013.01); E21B 34/06 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A plugging device for use in multistage fracturing a subterranean formation, the plugging device comprising:
a plug body having a distal end, a proximate end, and an outer surface;
a plurality of grooves disposed on the outer surface; and
an index sleeve movingly disposed on the outer surface, the index sleeve configured to engage the plurality of grooves;
wherein the proximate end comprises a shear ring, a seal element, and at least one backup ring disposed therearound,
wherein the index sleeve is set in an initial position before entering a first cluster of valves,
and wherein the index sleeve is configured to increment from the distal end toward the proximate end one groove of the plurality of grooves after leaving the first cluster of valves.