Apparatus for indicating subsea well head pressure
US4193307A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1978 |
| Grant date | Mar 18, 1980 |
| Priority date | — |
| Expiry date | Jun 14, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L11/006
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for indicating at the surface, the subsea well head pressure including; a reservoir, a subsea hydraulic transmitter, a pump to pump hydraulic fluid from reservoir to the subsea hydraulic transmitter, a pressure gauge connected at the surface in the line from the pump to the transmitter, means connecting the transmitter to said reservoir, means for connecting the transmitter to the well head whereby well head pressure is delivered to the transmitter, the transmitter being located on the subsea well head equipment, a flow controlling restrictor connected between the pump and the pressure gauge and the transmitter, the transmitter having a body with a bore at one end and a counterbore at the other end, a piston slidable in said bore and connected to a diaphragm in the counterbore, the piston being exposed to well head pressure, the diaphragm being exposed to pump pressure on one side and to hydrostatic head on the other side with opposite sides of the diaphragm having equal areas to compensate for hydrostatic head, an exhaust valve actuated by the diaphragm to close communication between opposite sides thereof whenever forces from the pump pressure on diaphragm is exceede…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.