Vibration mitigation tool
AssigneeNational Oilwell Varco, L.P.
InventorsSouhail Bouaziz, Jonathan Getz, Chigozie Emuchay
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Abstract
A vibration mitigation tool may include a mandrel portion, a sleeve portion arranged about the mandrel portion and configured to move longitudinally and rotationally relative to the mandrel portion. The tool may also include a spring stack configured to control compression on the vibration mitigation tool through compression of the spring stack and to control tension on the vibration mitigation tool through compression of the spring stack. A helical engagement between the mandrel portion and the sleeve portion may also be provided.
Claims20
A vibration mitigation tool, comprising:
- a mandrel portion;
- a sleeve portion arranged about the mandrel portion and configured to move longitudinally and rotationally relative to the mandrel portion;
- a spring stack comprising a first spring and a second spring, the second spring distal of the first spring, the spring stack configured to control compression on the vibration mitigation tool through compression of both the first spring and the second spring toward one another, wherein a proximal end of the first spring moves closer to a distal end of the second spring, and to control tension on the vibration mitigation tool through compression of both the first spring and the second spring toward one another, wherein the proximal end of the first spring moves closer to the distal end of the second spring;
- and
- a helical engagement between the mandrel portion and the sleeve portion.
A vibration mitigation tool, comprising:
- a mandrel portion;
- a sleeve portion arranged about the mandrel portion and configured to move longitudinally and rotationally relative to the mandrel portion;
- a spring stack comprising a first spring and a second spring, the spring stack configured to control compression on the vibration mitigation tool through compression of both the first spring and the second spring, wherein an opposite end of the first spring moves closer to the opposite end of the second spring, and to control tension on the vibration mitigation tool through compression of both the first spring and the second spring, wherein the opposite end of the first spring moves closer to the opposite end of the second spring;
- and
- a helical engagement between the mandrel portion and the sleeve portion.
A vibration mitigation tool, comprising:
- a mandrel portion;
- a sleeve portion arranged about the mandrel portion and configured to move longitudinally and rotationally relative to the mandrel portion;
- a spring stack comprising a first spring and a second spring, the second spring distal of the first spring, the spring stack configured to control compression on the vibration mitigation tool through compression of both the first spring and the second spring toward one another, wherein a proximal end of the first spring moves closer to a distal end of the second spring, and to control tension on the vibration mitigation tool through compression of both the first spring and the second spring toward one another, wherein the proximal end of the first spring moves closer to the distal end of the second spring;
- and
- a helical engagement between the mandrel portion and the sleeve portion, wherein the mandrel portion and the sleeve portion together form a lubrication chamber including a first portion configured for lubricating a helical engagement, a second portion in fluid communication with the first portion and for lubricating a biasing mechanism, and a third portion in fluid communication within the vibration mitigation tool with the first portion and the second portion and for interfacing with a pressure equalizing chamber.
Dependencies are inferred from the claim text.