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; a seismic sensor configured to record seismic signals; and an anchoring system configured to rock or twist the base in a given sequence so that the base (B) penetrates into the ocean bottom.
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:
Systems, methods, and apparatuses related to automatically and simultaneously charging a plurality of autonomous seismic nodes on a marine vessel before and/or after deployment to the seabed are disclosed. In one embodiment, a plurality of autonomous seismic nodes are simultaneously charged in a CSC approved ISO container. Each autonomous seismic node may comprise a plurality of power connectors, a plurality of rechargeable batteries, and a battery management system. Each of the nodes may be configured to couple with a charging system on the marine vessel, which may include a power source, one or more power/charging stations, one or more power connectors, and a network. In one embodiment, a storage rack in a container has a plurality of charging rails that the plurality of nodes can be placed upon for storage and charging. The node may have a plurality of power connectors disposed within a plurality of grooves that are configured to couple with the plurality of charging rails for simultaneous charging.
Abstract:
Embodiments, including systems and methods, for remotely controlling underwater vehicles (such as ROVs) and deploying ocean bottom seismic nodes from the underwater vehicles. A direct data connection may be created between an Integrated Navigation System (located on a surface vessel) and a ROV controller/Dynamic Positioning (DP) system (which may be located on the surface vessel and/or the ROV). The INS may be configured to output the ROV target position and ROV position (such as standard 2 or 3 dimensional coordinates) to the DP system. The DP system may be configured to calculate the necessary ROV movements based on directly received data from the INS. Based on a selected ROV target destination or desired ROV action (which may be done automatically or by an operator), the ROV may be automatically positioned and/or controlled based on commands from the DP system based on commands and/or data from the INS.
Abstract:
Systems, methods, and apparatuses related to coupling an autonomous seismic node to the seabed. In one embodiment, the node may comprise a plurality of holes on a bottom surface of the node and a plurality of openings on one or more sides and/or surfaces of the node. The bottom surface may comprise a coupling plate that is coupled to the node and/or coupled to a housing or casing that substantially surrounds a pressure node housing. The node may be configured to route water vertically from the bottom holes through the side openings and/or upper holes to decrease the potential of cavitation and fluidization of the seismic sediment and increase the seismic coupling of the node to the seabed.
Abstract:
Apparatuses, systems, and methods for data and/or power transfer to and from an ocean bottom seismic node are described. In an embodiment, an autonomous seismic node is configured with a bulkhead connector assembly that may be coupled to a plug assembly for data and/or power transfer and a pressure cap assembly when utilized subsea. A plurality of pins may be located on the bulkhead assembly in a substantially flat contact surface to obtain an external electrical connection to the node. The pins on the bulkhead assembly may form a flat circuit with an external device, such as a plug assembly or pressure cap assembly. One or more external devices may be coupled to the pressure cap assembly and/or bulkhead connector for increased functionality to the node. A quick release assembly and/or locking ring may be utilized to fasten any external device to the bulkhead connector assembly.
Abstract:
Apparatuses, systems, and methods for the docking of an underwater vehicle (such as a ROV) to a subsea structure (such as a basket or cage) for the transfer of payload devices, such as ocean bottom seismic nodes. The ROV may have a docking probe that is rotatable between an extended and retracted position by a rotatory actuator. The subsea structure may have a docking receptacle that receives the docking probe while the probe is in an extended position. The docking probe and receptacle can latch and/or be secured together by a variety of mechanisms. Once secured, the docking probe can rotate thereby changing the relative positions (horizontal and/or vertical) of the ROV and the subsea structure. The underwater vehicle may have an elevator mechanism that may move vertically and/or horizontally and that is coupled to a handler or grabber for handling and/or transfer of the payload devices.
Abstract:
Embodiments, including systems and methods, for modeling the catenary shape of one or more deployment lines from a marine vessel, each of which is connected to a subsea device. A subsea device may include ROVs or other underwater vehicles and subsea cages, baskets, and similar devices that may be lowered or raised from the surface vessel. The disclosed system and method provides real-time modeling and predictive modeling of the catenary shape of the deployed lines based on input from one or more real time navigation sensors, as well as inputted parameters or values such as length of deployed cable, etc. This allows the surface vessel and/or ROV operators to maximize the position and speed of the surface vessel, ROV, and other subsea devices, and overall seismic node deployment and recovery operations, within the operational constraints of the system without causing cable failure or entanglement of the deployed lines.
Abstract:
A system, apparatus, and method for transferring a subsea payload (such as seismic nodes) at a subsea position by using an elevator system located on a subsea basket. A plurality of seismic nodes may be located on a plurality of support slides, trays, or other node holders at different levels within the basket. The elevator system is configured to move the seismic nodes between different heights within the basket for external transfer from one or more vertical positions. During transfer operations between a subsea basket and an underwater vehicle (e.g., ROV), the desired level of seismic nodes may be positioned to the desired vertical position within the basket and transferred to the ROV by various transfer mechanisms, such as an extendable stinger or chain drive. Multiple levels of seismic nodes (or node holders) may be transferred between the basket and ROV during a single subsea docking.
Abstract:
Seismic autonomous underwater vehicles (AUVs) for recording seismic signals on the seabed. The AUV may be negatively buoyant and comprise an external body (which may be formed of multiple housings) that substantially encloses a plurality of pressure housings. Portions of the external body housing may be acoustically transparent and house one or more acoustic devices for the AUV. The AUV may comprise a main pressure housing that holds substantially all of the electronic components of the AUV, while a second and third pressure housing may be located on either side of the main pressure housing for other electronic components (such as batteries). A plurality of external devices (such as acoustic devices or thrusters) may be coupled to the main pressure housing by external electrical conduit. The AUV may comprise fixed or retractable wings for increased gliding capabilities during subsea travel.