Downhole pump
US4173451A · kind A · utility
12Cited by
5References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 1978 |
| Grant date | Nov 6, 1979 |
| Priority date | — |
| Expiry date | May 8, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B19/022
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An improved downhole pump includes a pump body connected to the lower end of tubing extending inside a well. Pumping is effected below the standing valve by a plunger reciprocating within a slidable barrel. In one embodiment, the ported barrel is magnetically responsive to stroking of the plunger to define a closed volume on the upstroke and a vented volume on the downstroke, whereby gas lock is eliminated. In another embodiment, the barrel is mechanically responsive to the plunger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.