Experimental device and method for co-existence of overflow and lost circulation in fractured formation during drilling of deviated well
US12078054B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2024 |
| Grant date | Sep 3, 2024 |
| Priority date | — |
| Expiry date | Mar 8, 2044 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/20
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An experimental device and method for co-existence of overflow and lost circulation in a fractured formation during drilling of a deviated well are provided. An inner cavity of an outer pipe is provided with an inner pipe to form a deviated casing. An upper side of the outer pipe is provided with a mixture outlet. A middle-lower side of the outer pipe is provided with a leakage port and two overflow ports. The gap width can be changed by adjusting a bolt and a support block to be compatible with different types of fracture models. A gas injection system includes an air compressor and a gas flowmeter. An upper port of a liquid injection system is connected to a joint arranged at upper ends of the inner pipe and outer pipe through a water pump, a liquid flowmeter and a liquid regulating valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.