Abstract:
A marine seismic streamer includes a jacket substantially covering an exterior of the streamer. At least one strength member is disposed along the length of the jacket. A sensor mount is coupled to the strength member. At least one particle motion sensor is suspended within the sensor mount at a selected location along the jacket. The at least one particle motion sensor is suspended in the jacket by at least one biasing device. A mass of the particle motion sensor and a force rate of the biasing device are selected such that a resonant frequency of the particle motion sensor within the sensor jacket is within a predetermined range. The sensor mount is configured such that motion of the jacket, the sensor mount and the strength member is substantially isolated from the particle motion sensor.
Abstract:
A seismic streamer includes a jacket covering an exterior of the streamer. At least one strength member extends along the length of the jacket inside the jacket. At least one seismic sensor is disposed inside the jacket. The seismic sensor is disposed in a mount. The mount defines a sealed, liquid filled chamber inside the jacket. A material fills the void spaces inside the jacket and outside the chamber. The material is introduced to the void spaces in liquid form and cures to a gel thereafter.
Abstract:
A seismic streamer includes a jacket covering an exterior of the streamer. At least one strength member extends along the length of the jacket. The strength member is disposed inside the jacket. Seismic sensors are disposed at spaced apart locations along the interior of the jacket. An acoustically transparent material fills the space inside the jacket. The material is introduced into the inside of the jacket in liquid form and undergoes a state change upon exposure to radiation. The radiation in one embodiment is ultraviolet radiation. The radiation in one embodiment is electron beam radiation.
Abstract:
A connector is disclosed for joining two cable ends. The connector includes a load transfer plug adapted to couple to a strength member in each end of the cable. A connector insert assembly is coupled to an inner portion of each load transfer plug. Conductor terminals are disposed in corresponding openings of the insert. The terminals protrude from the insert. An alignment sleeve holder is coupled to one of the insert assemblies. The alignment sleeve holder includes alignment sleeves for receiving the protruding terminals. A housing element is sealingly coupled to an exterior of each of the plugs. The housing elements are adapted to coupled to each other and to urge the connector insert assemblies into contact with each other, and to transfer axial load between the plug coupled to each end of the cable. The housing elements have rotational and axial alignment features on corresponding surfaces. The housing elements are adapted to be removed from the plugs without uncoupling the cable from the plug.
Abstract:
Systems and methods comprise marine geophysical equipment with polyurethane-based material at least partially covering a surface. The surface also at least partially coated with a suspension medium and with a biocide. A method comprises disposing such marine geophysical equipment in a body of water. A method comprises applying a suspension medium and a biocide to a surface at least partially covered with a polyurethane-based material.
Abstract:
Disclosed are methods and systems for using an impact-activated device for repelling sharks from marine geophysical survey equipment. An embodiment discloses a marine geophysical survey system, comprising: marine geophysical survey equipment configured to be located in a body of water when in operation; and an impact-activated device coupled to the marine geophysical equipment, wherein the impact-activated device comprises a circuit configured to release a shark repellent in response to a pre-determined impact on the impact-activated device.
Abstract:
A marine geophysical survey cable retriever system. At least some of the illustrative embodiments are methods including causing a submerged survey cable to surface. In some cases, causing the submerged survey cable to surface includes: shedding ballast weights when the survey cable reaches or exceeds a first predetermined depth; and inflating a lifting bag when the survey cable reaches or exceeds a second predetermined depth.
Abstract:
Depth triggers for marine geophysical survey cable retriever systems. At least some of the illustrative embodiments include causing a submerged geophysical survey cable to surface. In some cases, the causing the cable to surface may include: fracturing a frangible link wherein the frangible link, before the fracturing, affixes position of a piston within a cylinder bore of a housing coupled to the geophysical survey cable, and the fracturing of the frangible link responsive to pressure exerted on a face of the piston as the geophysical survey cable reaches or exceeds a predetermined depth; moving the piston within the cylinder bore; and deploying a mechanism that makes the geophysical survey cable more positively buoyant.
Abstract:
A system comprises towed marine seismic equipment marine seismic equipment, adapted for towing through a body of water; and a coating of copper particles covering the marine seismic equipment to protect from marine growth. A method comprises towing marine seismic equipment having a coating of copper particles thereon to protect from marine growth.
Abstract:
A seismic streamer includes a jacket covering an exterior of the streamer. At least one strength member extends along the length of the streamer and is disposed inside the jacket. At least one seismic sensor is disposed in a sensor spacer affixed to the at least one strength member. An encapsulant is disposed between the sensor and the sensor spacer. The encapsulant is a substantially solid material that is soluble upon contact with a void filling material. A void filling material is disposed in the interior of the jacket and fills substantially all void space therein. The void filling material is introduced to the interior of the jacket in liquid form and undergoing state change to substantially solid thereafter.