System and method for low-pressure well completion
US7296631B2 · kind B2 · utility
14Cited by
16References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2007 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | Feb 2, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/047
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A low-pressure wellhead system with tubular heads and mandrels secured independently using threaded unions. A casing mandrel is secured to a wellhead by a first threaded union. Likewise, a tubing head spool is secured to the casing mandrel using a threaded union. A tubing hanger is also secured to the tubing head spool using a threaded union. An adapter flange may also be secured to the tubing hanger by a threaded union. Because this low-pressure wellhead is faster and easier to assemble and provides full bore access, there is less rig downtime, thus rendering the well completion process faster and more economical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.