Transfer apparatus adapted for transferring an explosive train through an externally pressurized secondary explosive bulkhead
US5123356A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1991 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Jun 27, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42D1/043
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A transfer unit is sealingly connected to a pressure tight housing. The pressure tight housing includes a detonator and electronics circuits connected to the detonator, the pressure tight housing being adapted to be disposed in a well apparatus situated in a wellbore. The wellbore contains fluids at high temperature and pressure, and the pressure tight housing protects the detonator and electronics from the severe temperature and pressure of the wellbore fluids. The transfer unit receives, on one end, the detonator and, on the other end, a separate detonating cord which is adapted to be connected to another separate explosive device and includes a pressure proof housing and a matrix of secondary explosive disposed in a compressed condition within the pressure proof housing between the detonator and the detonating cord, the matrix of secondary explosive functioning like a transversely disposed bulkhead or barrier for protecting the detonator and associated electronics from the severe temperature and pressure of the wellbore fluids which exists adjacent the detonating cord. Although the secondary explosive bulkhead is compressed within the pressure proof housing, the detonating cord …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.