Method and apparatus for seismic data acquisition
First Claim
1. An ocean bottom seismic data collection system comprising:
- a. a water tight case having a wall defining an internal compartment;
b. at least one geophone disposed within said casec. a clock disposed within said case;
d. a power source disposed within said case; and
e. a seismic data recorder disposed within said case,f. said system having a negative buoyancy;
g. wherein said system is self contained and requires no external communications or controls during recording,h. wherein the case comprises a first plate having a first periphery and a second plate having a second periphery, wherein the plates are joined along their peripheries by said wall.
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Accused Products
Abstract
A marine seismic exploration method and system comprised of continuous recording, self-contained ocean bottom pods characterized by low profile casings. An external bumper is provided to promote ocean bottom coupling and prevent fishing net entrapment. Pods are tethered together with flexible, non-rigid, non-conducting cable used to control pod deployment. Pods are deployed and retrieved from a boat deck configured to have a storage system and a handling system to attach pods to cable on-the-fly. The storage system is a juke box configuration of slots wherein individual pods are randomly stored in the slots to permit data extraction, charging, testing and synchronizing without opening the pods. A pod may include an inertial navigation system to determine ocean floor location and a rubidium clock for timing. The system includes mathematical gimballing. The cable may include shear couplings designed to automatically shear apart if a certain level of cable tension is reached.
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Citations
52 Claims
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1. An ocean bottom seismic data collection system comprising:
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a. a water tight case having a wall defining an internal compartment; b. at least one geophone disposed within said case c. a clock disposed within said case; d. a power source disposed within said case; and e. a seismic data recorder disposed within said case, f. said system having a negative buoyancy; g. wherein said system is self contained and requires no external communications or controls during recording, h. wherein the case comprises a first plate having a first periphery and a second plate having a second periphery, wherein the plates are joined along their peripheries by said wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. An ocean bottom seismic data collection system comprising:
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a. a disk-shaped, water tight case formed of two parallel, circular plates joined along their peripheries by a shallow wall to define an internal compartment; b. at least one geophone disposed within said case c. a clock disposed within said case; d. a seismic data recorder disposed within said case; and e. a power source disposed within said case, f. said system having a negative buoyancy. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. An ocean bottom seismic data collection system comprising:
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a. a water tight case, wherein the case comprises a first plate having a first periphery and a second plate having a second periphery, the first and second plates joined along their peripheries by a wall so as to define an internal compartment; b. at least one geophone disposed within said case c. a clock disposed within said case; d. a power source disposed within said case; and e. a seismic data recorder disposed within said case, f. said case having a negative buoyancy; g. wherein said system is self contained and all electrical wiring for the system is contained within said case.
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Specification