Resettable Telescoping Plug Retrieving Tool
AssigneeHalliburton Energy Services, Inc.
InventorsPeter Reid Maher, Colby Munro Ross, Jhess Menard
Life of this patent
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Abstract
A plug retrieval tool includes a mandrel lowerable into a wellbore. A retrieval head is coupled to the mandrel for selectively latching onto a plug. A shroud is telescopically coupled to the mandrel about the retrieval head and moveable repeatedly between an extended position below the retrieval head for displacing debris on the plug and a retracted position for moving the retrieval head closer to the plug to latch onto the plug. A resistance mechanism provides a resistance to moving the shroud each time the shroud is moved toward the retracted position
Claims20
A plug retrieval tool, comprising:
- a mandrel lowerable into a wellbore;
- a retrieval head coupled to the mandrel for selectively latching onto a plug;
- a shroud telescopically coupled to the mandrel about the retrieval head and moveable repeatedly between an extended position for displacing debris on the plug and a retracted position for moving the retrieval head closer to the plug;
- and
- a resistance mechanism providing a resistance to moving the shroud each time the shroud is moved toward the retracted position, wherein the resistance mechanism comprises one or more valves providing the resistance when moving the shroud toward the retracted position and one or more other valves providing the resistance when moving the shroud to the extended position.
(canceled)
A plug retrieval tool, comprising:
- a mandrel lowerable into a wellbore;
- a retrieval head coupled to the mandrel for selectively latching onto a plug;
- a shroud telescopically coupled to the mandrel about the retrieval head and moveable repeatedly between an extended position for displacing debris on the plug and a retracted position for moving the retrieval head closer to the plug;
- and
- a resistance mechanism including first and second fluid chambers defined between the mandrel and the shroud, a valve plate separating the first and second fluid chambers, and one or more valves arranged in the valve plate to constrain flow from the second fluid chamber to the first fluid chamber to provide resistance when the shroud is moved toward the retracted position.
A method comprising:
- step a). lowering a plug retrieval head into a wellbore on a mandrel with a shroud telescopically coupled to the mandrel about the retrieval head;
- step b). with the shroud in an extended position, displacing debris on the plug using a lower end of the shroud while resisting movement of the shroud to the retracted position on the mandrel;
- step c). after displacing debris, lowering the mandrel to move the shroud to a retracted position on the mandrel thereby moving the retrieval head to the plug;
- step d). latching onto the plug with the retrieval head;
- step e). removing the plug from the wellbore on the retrieval head;
- if the retrieval head failed to latch onto the plug;
- moving the mandrel away from the plug to allow the shroud to return to the extended position;
- resetting the internal valve simultaneously to apply compression on any remaining debris without the retrieval head to move towards the plug;
- and
- completing steps a-e again.
Dependencies are inferred from the claim text.