Fibrous seal for blowout preventer
US5713581A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1996 |
| Grant date | Feb 3, 1998 |
| Priority date | — |
| Expiry date | Feb 21, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/944
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A high pressure seal material, such as for a lateral "T" seal of a shear ram blowout preventer, is disclosed wherein the seal material is preferably nitrile rubber and includes uniformly dispersed synthetic, non-cellulosic fibers in parallel alignment to resist rollover action occurring transverse to the applied compressive force by orienting the aligned fibers parallel to the axis of the applied force. The material is made in a milling process that aligns and maintains the alignment of the fibers. The milled sheet is then cut into appropriately shaped pieces. The pieces are rotated 90.degree., plied and cured to make the final material, which curing can be done in a suitable mold so that the final product is in its desired final shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.