Pressurized chamber management
First Claim
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1. An apparatus comprising:
- a pressure compensated fluid containment system comprising;
a chamber comprising a port; and
a piston slidably disposed within the chamber and dividing the chamber into first and second portions, wherein the first portion is fluidly connected with the port and the second portion is in fluid communication with a space external to the apparatus, and wherein during liquid filling operations the apparatus is operable to;
maintain the piston in a first piston position within the chamber while the first portion receives a liquid via the port to compress gas located within the first portion; and
permit the piston to move to a second piston position due to expansion of the gas compressed within the first portion.
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Abstract
Apparatus and methods for filling a pressure compensated fluid container with a liquid. An example method includes restraining movement of a piston slidably disposed within the fluid container in a first piston position, wherein the piston divides the fluid container into first and second portions. The method further includes pumping the liquid into the first portion to compress gas located within the first portion, stopping the pumping of the liquid into the first portion, and stopping the restraining of movement of the piston to permit the piston to move to a second piston position due to expansion of the gas compressed within the first portion.
17 Citations
20 Claims
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1. An apparatus comprising:
a pressure compensated fluid containment system comprising; a chamber comprising a port; and a piston slidably disposed within the chamber and dividing the chamber into first and second portions, wherein the first portion is fluidly connected with the port and the second portion is in fluid communication with a space external to the apparatus, and wherein during liquid filling operations the apparatus is operable to; maintain the piston in a first piston position within the chamber while the first portion receives a liquid via the port to compress gas located within the first portion; and permit the piston to move to a second piston position due to expansion of the gas compressed within the first portion. - View Dependent Claims (2, 3, 4, 5)
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6. A method comprising:
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restraining movement of a piston slidably disposed within a pressure compensated fluid container in a first piston position, wherein the piston divides the fluid container into first and second portions; pumping a liquid into the first portion to compress gas located within the first portion; stopping the pumping of the liquid into the first portion; and stopping the restraining of movement of the piston to permit the piston to move to a second piston position due to expansion of the gas compressed within the first portion. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method comprising:
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filling a pressure compensated fluid chamber of a downhole tool by; restraining movement of a piston slidably disposed within the chamber in a first piston position, wherein the piston divides the chamber into first and second portions, and wherein the second portion is in fluid communication with a space external to the downhole tool; pumping a liquid into the first portion to compress gas located within the first portion; stopping the pumping of the liquid into the first portion; and stopping the restraining of movement of the piston to permit the piston to move to a second piston position due to expansion of the gas compressed within the first portion; and conveying the downhole tool within a wellbore causing an increasing ambient pressure to move the piston away from the second piston position as the liquid and gas within the first portion is compressed to maintain pressure within the first portion substantially equal to the increasing ambient pressure. - View Dependent Claims (20)
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Specification