发明名称 |
Precision positioning AGM system |
摘要 |
A precision positioning AGM system is provided for detecting the location of an AGM device, as well as the time of a smart pig passing the location. The practice combines two processes into one by using a GPS receiver at the AGM location to record raw GPS measurements at each AGM location. A second GPS receiver is provided at a remote known base location. These position signals and a pig-passage time signal from the AGM provide high accuracy positioning and pig passage time, with only one crew being required. These signals are broadcast to a remote monitoring site. This makes real-time pig tracking unnecessary and eliminates the need for more than one crew visiting the same site.
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申请公布号 |
US6816110(B1) |
申请公布日期 |
2004.11.09 |
申请号 |
US20030629747 |
申请日期 |
2003.07.30 |
申请人 |
VARCO I/P, INC. |
发明人 |
LIU ZIWEN W.;DEAN ALAN P. |
分类号 |
G01S19/23;G01S19/49;G01S19/51;(IPC1-7):H04B7/85 |
主分类号 |
G01S19/23 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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