Abstract:
An in-water distributed control system for use in marine seismic survey. The system includes a shipboard interface and power supply coupled to an in-water subsystem via a high bandwidth communication link. The in-water subsystem includes a remote control module for generating firing commands based on synchronizing and position parameters transmitted by the interface. The remote control module transmits power, data, and commends to a plurality of gun control modules. Each gun control module operates an air gun. An individually addressable remote cut-off valve controls air to each air gun. Depth and pressure at the gun control module is sensed by at least one DT/PT module. An optional expansion unit provides additional DT/PT capability.
Abstract:
A graphical user interface (GUI) and control system (102) for controlling and testing an acoustic source (14). The control system includes real-time data processing (124) of individual source near-field measured signatures and synthesis of array far-field signatures. The control system (102) determines individual source out-of-specification conditions and computes far-field signatures based on an array configuration and, when applicable, excluding failed sources. Source, array, and troubleshooting information are presented to a user in real-time over a GUI monitor (126) to allow informed decision-making regarding continued and/or modified survey operations and operational parameters.
Abstract:
The present invention provides an interactive system for controlling seismic data acquisition (100). A central controller controls seismic sources, detectors and receivers (102-a) that provide the user or operator one or more views of the operational components over a graphical user interface (102). Software is provided to change the parameters associated with the components. A second controller might be located in the seismic source vehicle (110). Two way data and audio comunication i sprovided between the controllers (122) to provide dual control of the seismic system (100). A field operator operates and makes decisions for selecting and operating the system components and relays information to and receives information from the central operator and the controller.
Abstract:
The present invention provides an interactive system for controlling seismic data acquisition. A central controller controls seismic sources, detectors and receivers. A user/operator is provided one or more views of the operational components over a graphical user interface and is provided software to change parameters associated with the components. A second controller might be located in a seismic source vehicle. There exists two-way data and audio communication between the two controllers for providing dual control of the system. A field operator, relays information to and receives information from the central operator and controller. Together, the operators make decisions for selecting and operating system components.
Abstract:
A sensor module (110) includes a module case (112) coupled to a module cap (114). The module cap (114) provides an access into the module case (112) for one or more electrical conductors of a telemetry cable. Housed in the module case (112) and module cap (114) is a sensor electronics package (116), the module case (112) is constructed with a wall thickness that allows for wall flexure to provide damping of high-g shock input. The outer surface (126) may include a longitudinal ridge (128). The longitudinal ridge (128) provides a key-type fit to prevent inadvertent rotation after the sensor module (110) is inserted into the ground. Disposed between the module tip (120) and the sensor electronics package (116) is an isolator (115) for isolating the sensor electronics package from damaging mechanical shock axially induced in the sensor module (110). The isolator (115) may comprise one or more layers (115a) and (115b) of vibration-isolating material. A first isolating layer 115a adjoins the electronic package 116 and a second isolating layer (115b). The second isolating layer (115b) adjoins the first isolating layer (115a) and the module tip (120). The first isolating layer (115a) is manufactured from a material such as silicone, and the second iasolating layer (115b) is manufactured from a material such as high-damping polyurethane foam. A second, and similary constructed isolator (130) is disposed between the sensor electronics package (116) and the module cap (114). The sensor module (110) includes one or more MEMS accelerometers in an electronic package (116).
Abstract:
A hydrophone housing (20) includes a hydrophone module or cap (56), which contains a hydrophone. The hydrophone housing (20) clamps around a marine seismic cable (16). The hydrophone housing (20) further includes a first portion (78) and a second portion (82). One of the portions has a receiving recess (86). The hydrophone cap (56) installs on this receiving recess (86). The portions (78, 82) each include a contact surface (94) which contacts the cable (16) when the portions (78, 82) fasten around the cable (16). The portions (78, 82) clamp around the cable (16) via screws (102). The contact surface (94) includes raised bosses (98) which securely grip the cable (16) by increasing contact pressure per unit area in a region of contact between the raised bosses (98) and the cable (16). In another feature, the portion which contains a receiving recess (86) further includes a wire-clearance recess (90) and a wire passageway (106) between the receiving recess (86) and the wire-clearance recess (90).
Abstract:
A seismic source signal generator having feed-forward control having pressure, curre and/or valve position sensors that detect system component parameters. Initial and operating parameters are processed during source operation to remove, partially or wholly, harmonic distortions from the seismic source signal.
Abstract:
A seismic cable coupling comprising connector body, a coupling ring is rotatably mounted on the connector body. The coupling ring includes a ring body having a first longitudinal projection and a second longitudinal projection, the first longitudinal projection having an interior surface including a first angled groove, the second longitudinal projection having an exterior surface including a first raised stud. The coupling ring is a hermaphrodite coupling ring that mates with a coupling ring having a substantially identical ring body.
Abstract:
The invention describes a sensor array with digital signals transmitted over an optical fiber for seismic exploration systems. The seismic system includes a transducer for providing digital optical data signals and an optical interrogator for collecting the digital data. The transducer provides data from seismic sensors to the optical interrogator by acting on an optical carrier transmitted along the optical fiber. The system is designed to utilize known electromechanical seismic sensors with fiber optic telemetry.
Abstract:
The invention includes a permanent seafloor seismic recording system (100) using SEMS seismic sensors (106). Further included are backbone (112), multiple hubs (110) and sensor lines (108). The sensor lines include multiple sensor modules (106.