Adapters for double-locking casing mandrel and method of using same
US7040410B2 · kind B2 · utility
68Cited by
25References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2003 |
| Grant date | May 9, 2006 |
| Priority date | — |
| Expiry date | Aug 5, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/068
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Adapters for connecting to a double-locking casing mandrel of an independent screwed wellhead include a lockdown flange with an adapter pin, and a retainer flange that may be used with or without the adapter pin. The retainer flange has a top surface with circumferentially-spaced threaded bores that permit well stimulation equipment to be mounted thereto. The retainer flange threadedly connects to a pin thread at a top of the casing mandrel, and therefore provides a low profile mounting flange for well stimulation equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.