Deviation calculation rule used to monitor the drilling path of a two dimensional deviated hole
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United States of America Patent
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Jul 16, 2002
Grant Date -
N/A
app pub date -
Dec 15, 2000
filing date -
Dec 17, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a deviation calculation rule of the circular type for the monitoring of a two-dimensional deviated well path. The rule consists of a support plate (10) on which is marked a circular dial with two semi-circular scales (G.sub.1, G.sub.2) graduated in degrees for locating the inclination angle at the entry point and the exit point of a section of path, at least two rotary disks (12, 12.sub.1) each marked with a plurality of concentric circles (C.sub.1 through C.sub.n ; C.sub.1 through C'.sub.n that each correspond to an inclination gradient for a specific drilled length (Gbu), at least one bi-sectoral disk (14) with, on its edges, scales (E1 through E4) used to locate the various Gbu circles on the disk being used (12), a first sliding system (16h) allowing for a direct reading of the horizontal deflections and a second sliding system (16v) allowing for a direct reading of the vertical depth deviations.
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