Pressure control tool for modluating pressure in a portion of a wellbore
US7380592B2 · kind B2 · utility
13Cited by
16References
26Claims
0Family size
Inventors
Key dates
| Filing date | Oct 8, 2004 |
| Grant date | Jun 3, 2008 |
| Priority date | — |
| Expiry date | Feb 27, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1216
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pressure control device for mounting on a mandrel includes a flexible cup member, a rigid support member and an anti extrusion portion of greater hardness than the cup member located at an outer portion of the cup member. The cup member is bonded only to selected areas of the anti extrusion portion and the support member, thereby permitting relative movement between other areas of contact.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.