Variable ram packer with strain reduction features
US9580988B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2015 |
| Grant date | Feb 28, 2017 |
| Priority date | — |
| Expiry date | Dec 8, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/062
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A variable ram packer has an elastomeric body having a central semi-cylindrical recess and wings extending from opposite lateral sides of the recess. Inserts are positioned around the recess, each having an upper plate, a lower plate and a web joining the plates. Inserts at the junction with the wings have barrier plates between and parallel with the upper and lower plates. Upper and lower wing plates are located on upper and lower surfaces of the wings. An adhesive layer on an outer portion of each of the wing plates bonds the wing plates to the elastomer of the body. Each wing plate has an inner portion in abutment with the elastomer and free of the adhesive layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.