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US 10,208,566 B2Granted
Wellbore stimulation tool, assembly and method
OwnerKevin O. Trahan, Justin B. Johnson +1inventors
InventorsKevin O. Trahan, Justin B. Johnson, Jabian P. Trahan
Life of this patent
Estimating the term…
Abstract
A tubing string ported sub including a valve covering the port that can be opened by a pressure differential established across the valve. The valve includes an exposed portion that can be engaged to mechanically shift the valve.
Claims17
A tubing string sub comprising:
- a tubular wall defining an inner bore;
- at least one port through the wall to provide fluid communication between an outer surface of the tubular wall and the inner bore;
- a valve chamber within the tubular wall adjacent to the port, the valve chamber having an open end, and a closed end having a vent passageway to fluidly couple the inner bore and the valve chamber;
- and
- a valve having a first portion mounted in the valve chamber, and a second portion protruding from the open end of the valve chamber and covering the port, the valve being configured to axially shift more deeply into the valve chamber to open the port when a pressure differential is created between the second portion protruding from the open end, and the first portion mounted in the valve chamber having the vent passageway, wherein the second portion has a radial thickness greater than a radial thickness of the first portion and the second portion is mechanically engageable by a shifting tool located in the inner bore.
2 more elements
A method for stimulating a wellbore, the method comprising:
- moving a shifting tool comprising a seal within a tubing string in the wellbore to a position adjacent a tubing string sub, the sub including:
- a tubular wall defining an inner bore;
- at least one port through the wall to provide fluid communication between an outer surface of the tubular wall and the inner bore;
- a valve chamber within the tubular wall adjacent to the port, the valve chamber having an open end and a closed end with a vent passageway to fluidly couple the inner bore and the valve chamber;
- and a valve having a mounting portion mounted in the valve chamber and a second portion protruding from the open end of the valve chamber and covering the port, the second portion having a radial thickness greater than a radial thickness of the mounting portion, and the valve being configured to axially shift more deeply into the valve chamber for uncovering the port when a pressure differential is created between the second portion protruding from the open end and the mounting portion mounted in the valve chamber having the vent passageway;
- and,
- setting the seal so as to permit the creation of the pressure differential between the second portion protruding from the open end and the mounting portion mounted in the valve chamber having the vent passageway;
- applying increased pressure to the second portion protruding from the open end, to shift the valve deeper into the valve chamber to uncover the port,
- using the shifting tool, to mechanically engage the second portion of the valve protruding from the open end and to partially withdraw the valve from the valve chamber to cover the port.
6 more elements
Dependencies are inferred from the claim text.