US 12,241,332 B1
Isolation device with multiple pressure stages to isolate well interval
David Earl Ball, Stafford, TX (US); Marcus Ray Hudson, Pearland, TX (US); Christian Reding, Houston, TX (US); James Cernosek, Richmond, TX (US); and Anthony Herman van Zuilekom, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Jan. 18, 2024, as Appl. No. 18/416,433.
Int. Cl. E21B 33/124 (2006.01); E21B 33/13 (2006.01); E21B 47/06 (2012.01); E21B 7/04 (2006.01)
CPC E21B 33/1246 (2013.01) [E21B 33/13 (2013.01); E21B 47/06 (2013.01); E21B 7/046 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A well interval isolation device comprising:
a first, uphole expandable element, and a second, downhole expandable element spaced apart on a tool string and cooperating with a primary interval tool to form a primary interval isolating section of the well interval isolation device;
a third expandable element positioned on the tool string uphole of the first expandable element and cooperating with the first expandable element and a first uphole guard interval tool to form a first uphole guard interval section of the well interval isolation device; and
a fourth expandable element positioned on the tool string downhole of the second expandable element and cooperating with the second expandable element and a first downhole guard interval tool to form a first downhole guard interval section of the well interval isolation device;
wherein, the first expandable element and the second expandable element are expandable independently of the third expandable element and the fourth expandable element, and the primary interval tool is operable independently of the first uphole guard interval tool and the first downhole guard interval tool.