Cooling drilling fluid
US11867026B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2022 |
| Grant date | Jan 9, 2024 |
| Priority date | — |
| Expiry date | May 16, 2042 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system for cooling drilling fluid circulating in a wellbore drilled by a wellbore drilling system includes a drilling fluid conduit positioned at a surface location separate from a wellhead of the wellbore. Drilling fluid flowed from the wellbore and an outer jacket passes through the drilling fluid conduit. An inner surface of the outer jacket at least partially defines an interior volume within which the drilling fluid conduit is at least partially disposed. The interior volume is at least partially filled with liquid nitrogen, such that the drilling fluid passing through the drilling fluid conduit is cooled by heat exchange with the liquid nitrogen across a wall of the drilling fluid conduit prior to flowing back into the wellbore via a mud pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.