Block and module for seismic sources and sensors
AssigneeRead ASA
InventorHelge Brandsaeter
Life of this patent
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Abstract
The invention relates to a source block with a downhole seismic source for use in seismic acquisition during production, comprising: a device for locking the block in a first position spaced from the well casing, a device for releasing the locking device, a device for urging the source block against the casing. The source block is characterized by comprising, a fluid circuit for controlling the operation of the locking and releasing devices, this fluid circuit comprising a rupture disc.
Claims11
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.
Acquisition device according to any of the preceding claims, wherein the clamping device comprises at least one permanent magnet arranged on the block's surface facing the casing.
Acquisition device according to any of the preceding claims, wherein the clamping device comprises at least one spring device arranged on the block's surface facing the production pipe.
Acquisition device according to any of the preceding claims, wherein the clamping device comprises at least one permanent magnet arranged on the block's surface facing the production pipe for cooperation with a repellent permanent magnet arranged on the source module.
Acquisition device according to any of the preceding claims, characterised in that the locking device in the block comprises locking pins for cooperation with sockets in the source module.
Acquisition device according to any of the preceding claims, characterised in that it comprises spacers arranged on the surface of the block adapted for apposition against the casing.
Acquisition device according to one of the preceding claims, characterised in that it comprises at least one geophone and at least one accelerometer.
Acquisition device according to one of the preceding claims, characterized in that the device is an acoustic source.
Acquisition device according to one of the preceding claims, characterized in that the device is an acoustic sensor.
Dependencies are inferred from the claim text.