Systems and methods for positioning an isolation device in a borehole

A well system for a borehole, comprising:

• a tool string configured to travel through the borehole;
• a setting tool coupled to the tool string, the setting tool comprising an internal bypass fluid flowpath;
• a borehole isolation device coupled to the setting tool, the borehole isolation device comprising:
• a body having an outer diameter,
• an expandable ring configured such that an outermost portion of an uphole end portion is expandable from a first outer diameter to a second outer diameter that is greater than the first outer diameter due to a pressure differential of a fluid outside the body across the expandable ring being greater on the uphole end to create at least a partial seal between the borehole isolation device and an inner surface of the borehole or a casing in the borehole during conveyance to a location in the borehole;
• a pressure control device positioned within the internal bypass fluid flowpath and configured to control the pressure differential across the expandable ring by controlling an amount of the fluid passing through the bypass fluid flowpath during the conveyance into the borehole;
• a seat movable relative to the expandable ring to expand the expandable ring to create a seal between the borehole isolation device and an inner surface of the borehole or the casing at the location;
• and
• wherein the bypass fluid flowpath extends across the at least partial seal.

A method comprising:

• pumping a borehole isolation device coupled to a setting tool through a borehole by pumping a fluid in the borehole;
• controlling a fluid pressure across the expandable ring with a pressure control device of the borehole isolation device located in a bypass fluid flowpath through the setting tool to control the velocity of the borehole isolation device while being pumped through the borehole by controlling an amount of the fluid passing through the bypass fluid flowpath during conveyance of the borehole isolation device to a location in the borehole;
• expanding an outermost portion of an expandable ring of the borehole isolation device from a first outer diameter to a second outer diameter that is greater than the first outer diameter of the body due to a pressure differential of the pumped fluid outside the borehole isolation device across the expandable ring being greater on the uphole end to create at least a partial seal between the borehole isolation device and an inner surface of the borehole or a casing in the borehole during conveyance of the borehole isolation device to the location in the borehole;
• and
• expanding the expandable ring by moving a seat relative to the expandable ring to create a seal between the borehole isolation device and the inner surface of the borehole or the casing at the location.