Boring tool tracking/guiding system and method with...

Details Boring tool tracking/guiding system and method with... Boring tool tracking/guiding system and method with...

2005-02-15

2005-02-15

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

C175S045000

Reexamination Certificate

active

06856135

ABSTRACT:
An assembly and method for use in a system for tracking a boring tool that is moved by a drill string within an underground region where movement of the boring tool is characterized by certain orientation parameters including pitch and yaw includes a first arrangement for determining a first pitch orientation and a first yaw orientation of the boring tool at a first position of the boring tool and for determining a second pitch orientation and a second yaw orientation of the boring tool after moving the boring tool to a second position. A second arrangement establishes a distance between the first and second positions. A third arrangement uses the first and second pitch values, the first and second yaw values and the distance the between the first and second positions at least to determine a curvature of the drill string.

REFERENCES:
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patent: 5155442 (1992-10-01), Mercer
patent: 5193628 (1993-03-01), Hill, III et al.
patent: 5920194 (1999-07-01), Lewis et al.
patent: 6005532 (1999-12-01), Ng
patent: 6191585 (2001-02-01), Mercer et al.
patent: 6250402 (2001-06-01), Brune et al.

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