Downhole tool unit
AssigneeReelwell AS
InventorOla M. Vestavik
Life of this patent
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Abstract
The invention concerns a unit for a down hole well tool comprising a tool unit comprising at least one first fluid conduit and a return fluid conduit in use forming a well annulus space between the tool unit and the well bore. The tool unit is arranged with at least one piston provided for dividing the well annulus space into at least two well annulus spaces. The communication of fluid between the adjacent well annulus spaces at each side of the piston is controlled by the relative movement between the first fluid conduit and a control element.
Claims13
A unit for a down hole well tool comprising a tool unit comprising at least one first fluid conduit and a return fluid conduit, wherein the tool unit in use forms a well annulus between the tool unit and the well bore, wherein the tool unit is arranged with at least one piston provided for dividing the well annulus into at least two well annulus spaces, wherein the communication of fluid between the adjacent well annulus spaces at each side of the piston is controlled by a relative movement between the first fluid conduit and at least a portion of the piston in an axial direction of the well tool.
A unit for a down hole well tool comprising a tool unit comprising at least one first fluid conduit and a return fluid conduit, wherein the tool unit in use forms a well annulus between the tool unit and the well bore, wherein the tool unit is arranged with at least one piston provided for dividing the well annulus into at least two well annulus spaces, wherein the communication of fluid between the adjacent well annulus spaces at each side of the piston is controlled by a relative movement between the first fluid conduit and a control element, wherein the piston and the first fluid conduit are provided with recesses at their surfaces facing each other, configured to arrange for a passage for fluid communication or a closed condition determined by the relative position between the first fluid conduit and the piston.
A unit for a down hole well tool, comprising:
- a tool unit comprising a first fluid conduit and a return fluid conduit arranged inside the first fluid conduit, the tool unit being adapted for arrangement in a well bore such that a well annulus is formed between the tool unit and a wall of the well bore;
- a piston disposed about the first fluid conduit, the piston being configured to divide the well annulus into a first well annulus space above the piston and a second well annulus space below the piston;
- a fluid passage formed in a wall of the first fluid conduit, the fluid passage having a first opening for communication with the first well annulus space and a second opening for communication with the second well annulus space;
- and
- a valve member disposed about the first fluid conduit for closing and opening the fluid passage.
Dependencies are inferred from the claim text.