Wellbore pressure control with optimized pressure drilling
First Claim
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1. A well system, comprising:
- an accumulator in communication with a wellbore, whereby the accumulator applies pressure to the wellbore,wherein the accumulator is connected to a fluid return line between a blowout preventer stack and a choke manifold.
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Abstract
A well system can include an accumulator in communication with a wellbore, whereby the accumulator applies pressure to the wellbore. A method of maintaining a desired pressure in a wellbore can include applying pressure to the wellbore from an accumulator in response to pressure in the wellbore being less than the desired pressure. Another well system can include a dampener in communication with a wellbore isolated from atmosphere, whereby the dampener mitigates pressure spikes in the wellbore.
154 Citations
21 Claims
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1. A well system, comprising:
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an accumulator in communication with a wellbore, whereby the accumulator applies pressure to the wellbore, wherein the accumulator is connected to a fluid return line between a blowout preventer stack and a choke manifold. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of maintaining a desired pressure in a wellbore, the method comprising:
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providing an accumulator connected to a fluid return line between a blowout preventer stack and a choke manifold; and applying pressure to the wellbore from the accumulator in response to pressure in the wellbore being less than the desired pressure. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A well system, comprising:
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a dampener in communication with a wellbore isolated from atmosphere, whereby the dampener mitigates pressure spikes in the wellbore; and an accumulator connected to a fluid return line between a blowout preventer stack and a choke manifold, the accumulator being in communication with and configured to apply pressure to the wellbore. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification