Temperature compensated element
AssigneeTam International, Inc.
InventorsArthur LOGINOV, Ray FRISBY, Iain GREENAN
Life of this patent
Estimating the term…
Abstract
A time actuated element includes a mandrel, a housing coupled to the mandrel, the housing defining a fluid expansion chamber. A piston is positioned within the fluid expansion chamber. A thermally expanding fluid is positioned within the fluid expansion chamber. An end ring coupled to the piston slides along the mandrel in response to a sliding of the piston. A packer having a first end and a second end, the first end adapted to slide along the mandrel in response to a sliding of the end ring, and the second end fixedly coupled to the mandrel, so that a sliding of the first end of the packer toward the second end causes the packer element to decrease in length and increase in radius.
Claims18
A temperature compensated element comprising:
- a mandrel, the mandrel being generally tubular and having a central axis and an exterior cylindrical surface;
- a housing coupled to the mandrel, the housing defining a fluid expansion chamber between an inner wall of the housing and the exterior cylindrical surface of the mandrel;
- a piston positioned about the mandrel, the piston having a piston head positioned within the fluid expansion chamber and adapted to slide along the mandrel, the piston head forming a seal against the housing and the mandrel to enclose the fluid expansion chamber;
- a thermally expanding fluid positioned within the fluid expansion chamber;
- an end ring positioned about the mandrel, the end ring coupled to the piston, the end ring adapted to slide along the mandrel in response to a sliding of the piston;
- and
- a packer including a packer element coupled to the exterior cylindrical surface of the mandrel, the packer having a first end and a second end, the first end adapted to slide along the mandrel in response to a sliding of the end ring, and the second end fixedly coupled to the mandrel, so that a sliding of the first end of the packer toward the second end causes the packer element to decrease in length and increase in radius.
A method of isolating a section of wellbore comprising:
- providing a temperature compensated element, the temperature compensated element including:
- a mandrel, the mandrel being generally tubular and having a central axis and an exterior cylindrical surface;
- a housing coupled to the mandrel, the housing defining a fluid expansion chamber between an inner wall of the housing and the exterior cylindrical surface of the mandrel;
- a piston positioned about the mandrel, the piston having a piston head positioned within the fluid expansion chamber and adapted to slide along the mandrel, the piston head forming a seal against the housing and the mandrel to enclose the fluid expansion chamber;
- a thermally expanding fluid positioned within the fluid expansion chamber;
- an end ring positioned about the mandrel, the end ring coupled to the piston, the end ring adapted to slide along the mandrel in response to a sliding of the piston;
- and
- a packer including a packer element coupled to the exterior cylindrical surface of the mandrel, the packer having a first end and a second end, the first end adapted to slide along the mandrel in response to a sliding of the end ring, and the second end fixedly coupled to the mandrel;
- coupling the temperature compensated element to a downhole tubular assembly;
- running the downhole tubular assembly into a wellbore;
- heating the downhole tubular assembly;
- expanding the thermally expanding fluid, causing the piston, end ring, and first end of the packer to move along mandrel so that the packer element to decreases in length and increases in radius, defining an actuated position;
- and
- contacting the wellbore with the outer surface of the packer.
Dependencies are inferred from the claim text.