Self aligning stuffing box and guide bushing assembly
US6000469A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1998 |
| Grant date | Dec 14, 1999 |
| Priority date | — |
| Expiry date | Feb 17, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A stuffing box and guide bushing assembly, particularly adapted for use with a reciprocating pump rod connected to a downhole well pump and to a pumping unit on the Earth's surface. The stuffing box includes a frame comprising a lower plate member with a floor surface, an upper plate member spaced from the lower plate member and including an opposed and generally parallel roof surface, the upper plate member being supported by circumferentially spaced longitudinally extending column members. The upper plate member includes an internal threaded bore centered at the longitudinal central axis of the stuffing box assembly, which axis is also the central axis of the well and the desired central axis of reciprocation of the pump rod. A guide bushing includes a bore for receiving the pump rod and an externally threaded hub portion for engagement with the bore of the upper plate member. The upper plate member is releasably secured to the frame column members by bolts which are arranged on a bolt circle equally spaced so that the upper plate member and the guide bushing may be indexed 90.degree., 180.degree. or 270.degree. in either direction from an initial position to present a new bearin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.