Ball check-valve for linear reciprocating downhole pumps
US12209484B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2021 |
| Grant date | Jan 28, 2025 |
| Priority date | — |
| Expiry date | Apr 12, 2043 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present disclosure relates to a ball check-valve assembly comprising a ball; a casing comprising an outer surface and defining an internal cavity extending within the casing, the internal cavity comprising a cylindrical inner wall; a bottom threaded connection at a downhole end of the casing, the bottom threaded connection comprising an opening therethrough to allow fluid passage into the internal cavity; a top threaded connection at an uphole end of the casing, at least three longitudinally extending guides defined within internal cylindrical cavity; and (f) a sealing surface formed in the casing and interposed between the top threaded connection and the internal cavity, the sealing surface further defining at least three quartic-shaped flow-passages extending from the sealing surface and providing for fluid passage through the sealing surface from the internal cavity to the uphole end of the casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.