Ball actuable circulating dump valve
US4574894A · kind A · utility
55Cited by
6References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 12, 1985 |
| Grant date | Mar 11, 1986 |
| Priority date | — |
| Expiry date | Jul 12, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2665
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A dump valve for use in a downhole motor having a spring-based piston responsive to fluid flow to close a fluid flow port and to a ball actuated force to reopen the port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.