SUBSEA CONNECTOR ANTI-VIBRATION POSITION INDICATOR
Publication Date: 2017-Jul-10
The IP.com Prior Art Database
Disclosed is a subsea connector anti-vibration position indicator.
 Traditionally, large scale connectors, for example between a wellhead and a vertical tree are rated to manage pressures of 10,000 PSI up to potentially 15,000 PSI. However, with the development of new higher pressure connectors, often up to or beyond 20,000 PSI rating, there is a need to find a way to install an anti-vibration mechanism plus have a way to check the position of the connector locking system. That is, for lower pressure prior art connectors, these mechanisms were associated with the Mechanical Override Rods that emerge from the top of the connector. However, due to the increased pressure rating requirements, valve structure at the top of the connector is of increased size, leaving insufficient foot space to accommodate such features. As a practical matter, this means that these features are no longer used on the new, higher pressure rated, connectors. However, embodiments detailed herein now combine the anti-vibration functionality and the position indication functionality in a manner that allows the new higher pressure rated connectors to accommodate these features.
 The traditional Anti-vibration mechanism concept consists of a spring loaded ratchet latch detent that grips on a toothed anti-vibration rod connected to the Connector actuation piston. This mechanism is needed to prevent the Connector moving once the position is set by the operator due to operational vibrations through the Tree or Tubing Head Spool. It can also be used to lock the Connector piston for transportation to prevent damage from large transportation impact forces. When unlocked and in its normal run condition the Connector resists operational vibrations. When the operator changes the status of the Connector from lock or unlock, by applying pressure to the Connector actuation piston, that force overcomes the ratchet latch detent.
 The Position Indicator is a pointer an...