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.
Abstract:
Retriever systems for marine geophysical survey sensor streamers. At least some of the illustrative embodiments are methods including attaching a retriever system to a sensor streamer by: wrapping a lifting bag assembly at least partially around the sensor streamer, the lifting bag assembly comprising a deflated lifting bag, a gas cylinder, and a depth trigger mechanism; and covering the lifting bag assembly with an outer cover.
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.
Abstract:
Retriever systems for marine geophysical survey cables. At least some of the illustrative embodiments are methods including causing a submerged sensor streamer to surface by flooding an intermediate chamber with water, the intermediate chamber defined within a cylinder of a housing coupled to the sensor streamer, the flooding of the intermediate chamber responsive to the sensor streamer reaching or exceeding a predetermined depth; and responsive to flooding the intermediate chamber moving a first piston within the cylinder; and thereby puncturing a seal of a compressed gas cylinder responsive to movement of the first piston, the puncturing makes the sensor streamer more positively buoyant.
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.
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:
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.
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:
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:
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.