Well-killing system for ultra-deep well drilling with co-existence of overflow and lost circulation and operation method thereof
US12331602B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2024 |
| Grant date | Jun 17, 2025 |
| Priority date | — |
| Expiry date | Dec 15, 2044 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/106
- WIPO fieldCivil engineering
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.