Filter assembly having a bypass passageway and method
US7243740B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 2004 |
| Grant date | Jul 17, 2007 |
| Priority date | — |
| Expiry date | Aug 10, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/002
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A filter assembly including a primary flow passageway having at least one filter deployed therein and a secondary flow passageway having a bypass filter deployed therein is provided. The filter assembly further includes a bypass valve assembly configured to selectively open and close the secondary flow passageway when a fluid pressure is respectively above and below an adjustable, predetermined threshold value. Exemplary embodiments of this invention may be coupled to a drill string and advantageously utilized to filter drilling fluid downhole. Such embodiments tend to advantageously improve the filtering efficiency and safety of drilling operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.