Abstract

A system is for monitoring subsea parameters and is deployable in a water column. The system has: a tether to be moored to a seabed; a variable buoyancy member; one or more sensor units for sensing one or more subsea parameters; and a control unit. The control unit has a communication member for receiving data from the sensor unit(s) and for transmitting the data wirelessly to a remote recipient. The variable buoyancy member is adapted to move the communication member between a submerged position and a surface position for the wireless transmittal of data. The control unit is adapted to control the buoyancy of the variable buoyancy member. A non-variable buoyancy member is connected at an upper portion of the tether. The submerged position of the communication member is below the position of the non-variable buoyancy member. A method is for monitoring subsea parameters.

IPC Classes  ?

• B63B 22/18 - Buoys having means to control attitude or position, e.g. reaction surfaces or tether
• B63B 22/06 - Anchoring arrangements with means to cause the buoy to surface in response to a transmitted signal

Abstract

There is disclosed a system for monitoring subsea parameters, the system being deploy-able in a water column and comprising: - a tether with a first end portion to be moored to a seabed; - one or more sensor units for sensing one or more subsea parameters; and - a control unit, the control unit including a communication member for receiving data from the sensor unit(s) and for transmitting said data wirelessly to a remote recipient, the communication member being provided at or near a second end portion of the tether, wherein the system further comprises a variable buoyancy member connected to the tether, the variable buoyancy member being adapted to move the communication member between a position below the surface of the water column and a surface position for the wireless transmittal of data, and wherein the control unit is adapted to control the buoyancy of the variable buoyancy member. There is also disclosed a method for monitoring subsea parameters.

IPC Classes  ?

• E21B 41/00 - Equipment or details not covered by groups
• E21B 47/14 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
• B63B 22/06 - Anchoring arrangements with means to cause the buoy to surface in response to a transmitted signal