WELL-KILLING SYSTEM FOR ULTRA-DEEP WELL DRILLING WITH CO-EXISTENCE OF OVERFLOW AND LOST CIRCULATION AND OPERATION METHOD THEREOF
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United States of America
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Issued Date -
Apr 10, 2025
app pub date -
Dec 15, 2024
filing date -
Dec 15, 2024
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Abstract
A well-killing system for ultra-deep well drilling with co-existence of overflow and lost circulation is provided. An upper part of a wellhead blowout preventer is connected to a first mud pump and a lost circulation material mud tank through a pipeline, a first three-way control valve, and a second three-way control valve. A lower port of the second three-way control valve is connected to a second mud pump and a mud pit. A lower port of the first three-way control valve is connected to a first well-killing fluid tank and a second well-killing fluid tank. A gas-liquid separation tank is connected to a side of a wellhead device. A first pressure sensor and a first flowmeter are provided on a left port of the first three-way control valve. A second pressure sensor and a second flowmeter are provided at a left port of a third three-way control valve.
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