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US 10,119,376 B2Granted
Methods and systems for maintaining a pressure differential between pairs of packers
AssigneeComitt Well Solutions US Holding Inc.
InventorPeter Kris Cleven
Life of this patent
Estimating the term…
Abstract
Examples of the present disclosure relate to systems and methods for fracturing systems that maintain a substantially constant pressure differential between a first pressure zone and a second pressure zone.
Claims20
A system for stimulating a well comprising:
- a flow activated valve positioned proximate to a distal end of a tool, the flow activated valve being configured to move towards the distal end to the tool to seal a hole located at the distal most end of the tool responsive to flowing fluid through an inner diameter of the tool;
- a packer pair configured to expand responsive to the flow activated valve sealing the distal most end of the tool, the packer pair including an upper packer and a lower packer;
- a vent including a first end positioned above the lower packer and a second end positioned below the lower packer, the second end of the vent being coupled with a sliding sleeve, the sliding sleeve being configured to cover a vent hole through the tool responsive to the packer pair sealing against a wellbore wall, the vent hole extending laterally through the tool from the inner diameter of the tool to an annulus;
- a first pressure zone positioned within the inner diameter of the tool;
- a second pressure zone positioned outside of the tool between the upper packer and the lower packer;
- a linearly adjustable member configured to maintain a substantially constant pressure differential between the first pressure zone and the second pressure zone when the packers are sealing against the wellbore wall.
3 more elements
A method for stimulating a well comprising:
- positioning a flow activated valve proximate to a distal end of a tool;
- moving the flow activated valve towards the distal end of the tool to seal a hole positioned on the distal most end of the tool responsive to flowing fluid through an inner diameter of the tool;
- expanding a packer pair responsive to the flow activated valve sealing the distal most end of the tool, the packer pair including an upper packer and a lower packer;
- moving a sliding sleeve coupled to a vent to cover a vent hole, the vent hole extending laterally through the tool from the inner diameter of the tool to an annulus responsive to the packer pair sealing against a wellbore wall, wherein the vent includes a first end positioned above the lower packer and a second end positioned below the lower packer, the sliding sleeve being coupled to the second end;
- creating a first pressure zone positioned within the inner diameter of the tool;
- creating a second pressure zone positioned outside the the tool between the upper packer and the lower packer;
- maintaining, via a linearly adjustable member, a substantially constant pressure differential between the first pressure zone and the second pressure zone when the packers are sealing against the wellbore wall.
4 more elements
Dependencies are inferred from the claim text.