Hydraulic pumping rod connecting and disconnecting device
US4286663A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 1979 |
| Grant date | Sep 1, 1981 |
| Priority date | — |
| Expiry date | Jul 23, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/042
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pumping rod connecting and disconnecting device comprises: a lower production tubing column and an upper production tubing column having a larger diameter than that of the lower column; a connecting piece provided with a circular seat and a circular groove; a lower assembly mounted onto the upper end of a lower pumping rod column and provided with mounting and locking means, as well as with passage means arranged between the spaces located below and above the device; an upper assembly fixed to the lower end of an upper pumping rod column having a continuous axial conduit; and removable blocking means for blocking the locking means of the upper and lower assemblies, connected to a surface source of hydraulic pressure. The device can be used for pumping by means of floating pumping apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.