Method for measuring transient electromagnetic components to...

Details Method for measuring transient electromagnetic components to... Method for measuring transient electromagnetic components to...

2006-05-16

2006-05-16

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

With radiant energy or nonconductive-type transmitter

C324S339000

Reexamination Certificate

active

07046009

ABSTRACT:
A transverse induction transmitter on an instrument induces currents in an earth formation when it is pulsed. Transient measurements made at transverse and axial receivers are used for determination of a distance to a bed boundary. This may be used to control the drilling direction. Alternatively, a transmitter on an instrument having a conductive body induces currents in the earth formation. Transient signals are measured and the effect of the conductive body is removed by using a reference signal measured in a homogenous space.

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patent: 2003/0085707 (2003-05-01), Minerbo et al.
patent: 2003/0184299 (2003-10-01), Strack
patent: 2003/0184304 (2003-10-01), Homan et al.

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