发明名称 |
Method and system of depth triggers for marine geophysical survey cable retriever systems |
摘要 |
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. |
申请公布号 |
US9261618(B2) |
申请公布日期 |
2016.02.16 |
申请号 |
US201414513723 |
申请日期 |
2014.10.14 |
申请人 |
PGS Geophysical AS |
发明人 |
Stenzel Andre;Hu Youlin |
分类号 |
F16L1/24;G01V1/38;B63B22/14;B63C7/10;H02G1/10;G01V1/20 |
主分类号 |
F16L1/24 |
代理机构 |
|
代理人 |
|
主权项 |
1. A ballast system comprising:
a ballast attachment block comprising:
a first end and a second end, each end defining an outside diameter configured to couple to an inside diameter of a geophysical survey cable;a first attachment location medially disposed on the ballast attachment block;a passage extending between the first end and the second end, the passage disposed within the ballast attachment block; a first ballast weight abutting the ballast attachment block at the first attachment location, the first ballast weight defining a first aperture; a first depth release mechanism coupling the first ballast weight to the ballast attachment block, the first depth release mechanism comprising
a piston disposed within a cylinder defined in the ballast attachment block, the piston defining an outer face exposed to ambient pressure;a link member coupled to the piston and to the first ballast weight, wherein at depths in water above a predetermined depth the link member holds the piston in a non-triggered state; andwherein at the predetermined depth and below ambient pressure acting on the outer face of the piston creates a tension force that breaks the link member and releases the first ballast weight from the first attachment location. |
地址 |
Oslo NO |