Downhole pump
US7927083B2 · kind B2 · utility
11Cited by
11References
61Claims
0Family size
Assignees
Inventor
Key dates
| Filing date | Oct 7, 2004 |
| Grant date | Apr 19, 2011 |
| Priority date | — |
| Expiry date | Aug 11, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S417/904
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for pumping from a well. A pump includes a piston assembly reciprocably engaged in a cylinder assembly. Pressure applied to a column of fluid above the pump causes a pump chamber to fill with fluid. A spring mechanism coupled to an anchor point above the piston assembly provides upward force on the piston assembly. Alternate cycles of the application and release of pressure result in the pumping of a fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.