Pressure regulation mechanism for downhole well tools
Systems, methods, and apparatus for regulating pressure within a well tool. In some aspects, the well tool may include a cylinder, a setting chamber, and a first flow metering device and a second flow metering device installed in the cylinder. The first flow metering device having a first pressure threshold and the second flow metering device having a second pressure threshold may be configured to regulate an internal chamber pressure inside the setting chamber to reduce a collapse pressure or a pressure differential at the cylinder. The first flow metering device may be configured to allow an external pressure greater than a first pressure threshold to enter the setting chamber during a hydrocarbon recovery operation, and the second flow metering device may be configured to allow the internal chamber pressure greater than a second pressure threshold to exit the setting chamber after the hydrocarbon recovery operation.
1. A well tool, comprising:
a cylinder;
a setting chamber formed, in part, by the cylinder; and
a first flow metering device and a second flow metering device installed in the cylinder, the first flow metering device and the second flow metering device configured to regulate an internal chamber pressure inside the setting chamber to reduce a collapse pressure at the cylinder, wherein the first flow metering device is configured to allow an external pressure greater than a first pressure threshold to enter the setting chamber during a hydrocarbon recovery operation using the well tool, the external pressure being external to the well tool, and the second flow metering device is configured to allow the internal chamber pressure greater than a second pressure threshold to exit the setting chamber after stopping the hydrocarbon recovery operation.
2. The well tool of claim 1 , wherein a pressure differential between the inside of the setting chamber and external to the cylinder during the hydrocarbon recovery operation is set by the first pressure threshold of the first flow metering device to regulate and reduce the collapse pressure at the cylinder.
3. The well tool of claim 1 , wherein the second flow metering device maintains the internal chamber pressure at the second pressure threshold after the hydrocarbon recovery operation to maintain a setting pressure within the setting chamber.
4. The well tool of claim 1 , wherein the first flow metering device is a first check valve and the second flow metering device is a second check valve.
5. The well tool of claim 1 , wherein the well tool is a well packer, the well packer configured as either a mechanical hydraulic packer or a mechanical hydrostatic packer.
6. The well tool of claim 1 , further comprising:
an actuating mechanism configured to isolate the setting chamber to reduce burst pressure at the cylinder.
7. The well tool of claim 6 , further comprising:
a mandrel; and
a setting chamber port between the setting chamber and the mandrel,
wherein the actuating mechanism is configured to isolate the setting chamber from the mandrel by sealing the setting chamber port to reduce burst pressure at the cylinder.
8. The well tool of claim 1 , wherein the well tool is a well packer configured for use in
a fracturing operation for hydrocarbon recovery.
9. A method for regulating pressure in a well tool, comprising:
isolating a setting chamber of the well tool to reduce burst pressure at a cylinder of the well tool; and
regulating an internal chamber pressure inside the setting chamber using a first flow metering device and a second flow metering device installed in the cylinder of the well tool to reduce collapse pressure at the cylinder, wherein regulating the internal chamber pressure includes the first flow metering device allowing an external pressure greater than a first pressure threshold to enter the setting chamber during a hydrocarbon recovery operation using the well tool, the external pressure being external to the well tool, and the second flow metering device allowing the internal chamber pressure greater than a second pressure threshold to exit the setting chamber after stopping the hydrocarbon recovery operation.
10. The method of claim 9 , wherein regulating the internal chamber pressure includes limiting a pressure differential between the inside of the setting chamber and external to the cylinder during the hydrocarbon recovery operation to the first pressure threshold of the first flow metering device to reduce the collapse pressure at the cylinder.
11. The method of claim 9 , wherein regulating the internal chamber pressure includes maintaining the internal chamber pressure at the second pressure threshold of the second flow metering device after the hydrocarbon recovery operation to maintain a setting pressure within the setting chamber.
12. The method of claim 9 , wherein isolating the setting chamber of the well tool includes an actuating mechanism isolating the setting chamber from a mandrel of the well tool by sealing a setting chamber port to reduce burst pressure at the cylinder.
13. A well system for hydrocarbon recovery, comprising:
well tubing; and
one or more well packers, wherein each of the one or more well packers includes:
a cylinder;
a setting chamber formed, in part, by the cylinder; and
a first flow metering device and a second flow metering device installed in the cylinder, the first flow metering device and the second flow metering device configured to regulate an internal chamber pressure inside the setting chamber to reduce a collapse pressure at the cylinder, wherein the first flow metering device is configured to allow an external pressure greater than a first pressure threshold to enter the setting chamber during a hydrocarbon recovery operation using the one or more well packers, the external pressure being external to the one or more well packers, and the second flow metering device is configured to allow the internal chamber pressure greater than a second pressure threshold to exit the setting chamber after stopping the hydrocarbon recovery operation.
14. The well system of claim 13 , wherein a pressure differential between the inside of the setting chamber and external to the cylinder during the hydrocarbon recovery operation is set by the first pressure threshold of the first flow metering device to regulate and reduce the collapse pressure at the cylinder.
15. The well system of claim 13 , wherein the second flow metering device maintains the internal chamber pressure at the second pressure threshold after the hydrocarbon recovery operation to maintain a setting pressure within the setting chamber.
16. The well system of claim 13 , wherein the first flow metering device is a first check valve and the second flow metering device is a second check valve.
17. The well system of claim 13 , wherein each of the one or more well packers further includes:
a mandrel;
a setting chamber port between the setting chamber and the mandrel; and
an actuating mechanism configured to isolate the setting chamber from the mandrel by sealing the setting chamber port to reduce burst pressure at the cylinder.