Wellhead for providing structure when utilizing a well pumping system
US6223819A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 1999 |
| Grant date | May 1, 2001 |
| Priority date | — |
| Expiry date | Jul 13, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/126
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A wellhead for use with a surface mounted pumping unit operating a rod string extend to a downhole pump in a well. The wellhead includes a body having a bore for a rod string, a support rod assembly moveable across the bore for coupling with a rod string having a coupling flange to provide a rod string hanger and a releaseable lock operable with the rod string. The wellhead also comprises a hydraulic seal in the body around the bore to seal with a rod string through the bore. Blowout preventer rams in the body for closing off around the rod string through the body and closing off the bore through the body when no rod string is present. A securing structure at the opposite ends of the body secures the wellhead with a rod string operator above the wellhead and to secure the wellhead with a casing flange on a well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.