Patent ID: 7020045

Claim:
Tubing conveyed seismic acquisition device, comprising a source and/or a sensor module for placement between a well casing and a production pipe, wherein the source and/or sensor module comprises a block equipped with acoustic transducers and/or sensor devices and clamping devices for clamping the block against the well casing, wherein the block comprises a device for locking the block to the module in a first position where the block's surface is flush with the module's surface, a device for releasing the locking device, and a fluid circuit for controlling the operation of the locking and releasing devices, and wherein the fluid circuit comprises a first chamber containing a fluid under pressure, a second chamber containing a fluid under a lower pressure, and a rupture disc arranged between the chambers, the first chamber being connected to the locking device for controlling its position as a function of the fluid pressure in said first chamber, the first chamber being also connected to the releasing device, this device controlling fluid supply and thus pressure in the first chamber, the releasing device being adapted to increase pressure in the first chamber until rupture of the rupture disc, which causes the release of the locking device.