Abstract:
An underwater base handles an autonomous underwater vehicle. The underwater a support structure to be hooked to a cable, a storing part configured to store the AUVs, an inlet part located above the storing part and configured to control access of the plural AUVs to the storing part, and a control part configured to control a movement of the inlet part relative to the support structure. The control part is further configured to wirelessly guide the AUVs while approaching the inlet part.
Abstract:
A seismic survey system records seismic signals during a marine seismic survey. The system includes first and second clusters, each including a set of autonomous underwater vehicles (AUVs); each cluster being associated with a corresponding first or second unmanned surface vehicle (USV); and a central control unit located on a floating platform and configured to control the first and second USVs. The first USV follows its own path and the first cluster follows the first USV independent of the second USV or the second cluster.
Abstract:
A seismic survey system for recording seismic data underwater. The system includes first plural buoys configured to descend to a first predetermined depth (H1) in water, at least one buoy having a seismic receiver for recording the seismic data; a first vessel configured to launch the first plural buoys; and a first acoustic system attached to the first vessel and configured to detect a position of the at least one buoy while underwater. The at least one buoy is instructed to maintain the first predetermined depth (H1) underwater while recording the seismic data.
Abstract:
A recovery underwater base for handling an autonomous underwater vehicle (AUV) equipped with seismic sensors for recording seismic signals during a marine seismic survey. The recovery underwater base includes a storing part configured to store the AUV; an inlet part configured to control access to the storing part; a control part configured to control the inlet part; and a support part configured to support the control part, the storing part and the inlet part and to prevent a burial of the recovery underwater base if deployed on the ocean bottom. The control part is further configured to guide the AUV from the ocean bottom to the inlet part.
Abstract:
An autonomous underwater vehicle (AUV) for recording seismic signals during a marine seismic survey. The AUV includes a body having a base and sides; a propulsion system for guiding the AUV to a final target on the ocean bottom; a pump-jet connected to an inlet and plural base outlets, wherein the plural base outlets are distributed on the base; a processor connected to the pump-jet and configured to activate the pump-jet when the base in on the ocean bottom; and a seismic sensor configured to record seismic signals. The pump-jet has a first low speed so that water jets expelled at the plural base outlets fluidize the ocean bottom underneath the base and buries the AUV.
Abstract:
An autonomous underwater vehicle (AUV) is configured to record seismic signals during a marine seismic survey. The AUV includes a body having a base (B) and first and second sides (A, C), the body having a head part and a tail part; a propulsion system for guiding the AUV to a final target on the ocean bottom; jet pumps connected to corresponding nozzles on the first and second sides (A, C); a control device connected to the jet pumps; and a seismic sensor configured to record seismic signals. The jet pumps are actuated by the control device in a given sequence so that the base (B) penetrates into the ocean bottom.
Abstract:
An autonomous underwater vehicle (AUV) for recording seismic signals during a marine seismic survey. The AUV includes a body extending along an axis X and having a head portion, a middle portion, and a tail portion, wherein the middle portion is sandwiched between the head portion and the tail portion along the X axis; a cross-section of the middle portion, substantially perpendicular on the X axis, having a triangular-like shape; the head portion including a base portion having the triangular-like shape and configured to match the middle portion; the head portion having a tip that, when projected along the X axis on the base portion, substantially coincides with a centroid of the base portion having the triangular-like shape; and a seismic payload located within the body and configured to record seismic signals.
Abstract:
An underwater base for handling plural underwater vehicles equipped with seismic sensors for recording seismic signals during a marine seismic survey. The underwater base including a storing part configured to store the plural underwater vehicles; an inlet part located above the storing part and configured to control access of the plural underwater vehicles to the storing part; a control part configured to acoustically guide the plural underwater vehicles to the inlet part; and a support part configured to support the control part, the storing part and the inlet part. The storing part is further configured to receive the plural underwater vehicles as the plural underwater vehicles fall from the inlet part into the storing part.
Abstract:
An underwater base handles an autonomous underwater vehicle. The underwater base includes a storing part configured to store the AUV; a control part configured to control the storing part; and a support part configured to support the control part and the storing part and to prevent a burial of the underwater base into the ocean bottom. The control part is further configured to guide the AUV while approaching a desired target position on the ocean bottom.
Abstract:
An autonomous underwater vehicle (AUV) for recording seismic signals during a marine seismic survey. The AUV (200) includes a body (204) having a flush shape; a buoyancy system (202) located inside the body and configured to control a buoyancy of the AUV while traveling underwater; a processor (108) connected to the buoyancy system and configured to select one of plural phases for the buoyancy system at different times of the seismic survey, wherein the plural phases include a neutral buoyancy, a positive buoyancy and a negative buoyancy; and a seismic sensor (110) for recording seismic signals.