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US 12,305,470 B2Granted
Plug with shuttle valve
AssigneeTally USA, LLC
InventorDouglas Wayne Davison
Life of this patent
Estimating the term…
Abstract
An improved plug with shuttle valve is disclosed. The improved plug has a bore in which a shuttle valve travels between stops in the bore. The traveling shuttle valve serves to reduce wellbore pressure across at least portions of the plug, thereby at least reducing the possibility of damage resulting from undue wellbore pressure and leak spots.
Claims35
A wellbore plug for use in the bore of an oil and gas well, where the wellbore plug comprises:
- a bore;
- a first stop in the bore of the wellbore plug;
- a second stop in the bore of the wellbore plug;
- a sealing element surrounding the bore of the wellbore plug and positioned entirely between the first stop and the second stop such that there is no overlap between the sealing element and the first stop and the second stop, whereby the sealing element prevents contents in the bore of the oil and gas well from traveling between the sealing element and a wall of the bore of the oil and gas well when the wellbore plug is mounted in the bore of the oil and gas well;
- and
- a shuttle valve mounted in the bore of the wellbore plug to travel between the first stop and the second stop, whereby the shuttle valve is stopped by the first stop when pressure in the bore of the wellbore plug below the shuttle valve is greater than pressure in the bore of the wellbore plug above the shuttle valve, and whereby the shuttle valve is stopped by the second stop when pressure in the bore of the wellbore plug above the shuttle valve is greater than pressure in the bore of the wellbore plug below the shuttle valve.
3 more elements
A wellbore plug for use in the bore of an oil and gas well, where the wellbore plug comprises:
- a bore having a first end open to the wellbore and a second end open to the wellbore;
- a first stop in the bore of the wellbore plug;
- a second stop in the bore of the wellbore plug;
- a sealing element surrounding the bore of the wellbore plug and positioned between the first stop and the second stop, whereby the sealing element prevents contents in the bore of the oil and gas well from traveling between the sealing element and a wall of the bore of the oil and gas well when the wellbore plug is mounted in the bore of the oil and gas well;
- and
- a shuttle valve mounted in the bore of the wellbore plug to travel between the first stop and the second stop, whereby the shuttle valve is stopped by the first stop when pressure in the bore of the wellbore plug below the shuttle valve is greater than pressure in the bore of the wellbore plug above the shuttle valve, and whereby the shuttle valve is stopped by the second stop when pressure in the bore of the wellbore plug above the shuttle valve is greater than pressure in the bore of the wellbore plug below the shuttle valve.
3 more elements
Dependencies are inferred from the claim text.