Well purging and sampling pump
US5353870A · kind A · utility
19Cited by
24References
8Claims
0Family size
Inventor
Key dates
| Filing date | May 28, 1993 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | May 28, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B47/08
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The disclosed well purging and sampling pump has a hydraulically actuated rim driven cylindrical pumping piston assisted by an internal precharged gas return spring all mounted coaxially within a pump housing cylinder suitable for being lowered into and supported by the hydraulic conduits for actuation and pump delivery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.