Downhole Pressure Maintenance System Using A Controller
First Claim
1. A completion assembly comprising:
- a base pipe having an exterior surface at least partially defining an external region and an internal surface at least partially defining an internal region; and
a pressure maintenance device disposed in the base pipe and comprising;
a flow path that extends between the external region and the internal region;
a valve that controls the flow of a fluid from the internal region to the external region through the first flow path;
a first pressure sensor exposed to the external region; and
a controller in communication with the first pressure sensor and in communication with the valve.
1 Assignment
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Accused Products
Abstract
A method and apparatus that includes positioning a completion string that has an internal passageway and that has an external surface that at least partially defines an external region within a wellbore; isolating a zone of the external region from a wellbore hydrostatic pressure; measuring a pressure within the external region of the isolated zone; determining whether the pressure within the external region of the isolated zone is within a predetermined pressure range; and operating a valve that controls a flow of a fluid through a flow path from the internal region to the external region of the isolated zone when the pressure within the external region is outside of the predetermined pressure range.
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Citations
28 Claims
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1. A completion assembly comprising:
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a base pipe having an exterior surface at least partially defining an external region and an internal surface at least partially defining an internal region; and a pressure maintenance device disposed in the base pipe and comprising; a flow path that extends between the external region and the internal region; a valve that controls the flow of a fluid from the internal region to the external region through the first flow path; a first pressure sensor exposed to the external region; and a controller in communication with the first pressure sensor and in communication with the valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of pressure maintenance within an isolated zone of a wellbore comprising:
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positioning a first pressure maintenance device that is disposed in a completion string within a first zone of a wellbore, wherein the first pressure maintenance device comprises; a first flow path that extends between an external region of the completion string that is at least partially defined by an external surface of the completion string and an internal region of the completion string that is at least partially defined by an internal surface of the completion string; a first valve that controls the flow of a fluid from the internal region to the external region through the first flow path; a first pressure sensor exposed to the external region; and a first controller that is in communication with the first valve and the first pressure sensor; isolating the first zone from a first hydrostatic wellbore pressure that is associated with the first zone; measuring the pressure within the external region of the isolated first zone using the first pressure sensor; determining whether the pressure within the external region of the isolated first zone is less than a first zone minimum pressure using the first controller; and opening or partially opening the first valve to allow the fluid from the internal region to flow to the external region of the isolated first zone when the pressure within the external region of the isolated first zone is less than the first zone minimum pressure. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of isolated wellbore pressure maintenance, the method comprising:
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positioning a completion string that has an internal passageway and that has an external surface that at least partially defines an external region within a wellbore; isolating a zone of the external region from a wellbore hydrostatic pressure; measuring a pressure within the external region of the isolated zone; determining whether the pressure within the external region of the isolated zone is within a predetermined pressure range; and operating a valve that controls a flow of a fluid through a flow path from the internal region to the external region of the isolated zone when the pressure within the external region is outside of the predetermined pressure range. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification