Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Reexamination Certificate
2006-04-11
2006-04-11
Tokar, Michael (Department: 2862)
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
C324S345000, C324S346000, C324S347000, C324S354000, C324S355000, C324S357000, C324S358000, C324S359000, C324S360000, C324S366000, C324S368000, C324S371000, C324S335000, C324S336000, C324S337000, 36
Reexamination Certificate
active
07026820
ABSTRACT:
A method and apparatus for minimizing direct coupling between transmitters and receivers on a downhole logging tool are disclosed. One embodiment includes a transmitter, a bucking device, and a plurality of receivers, where signals may be directly coupled from the transmitter into the receivers and signals may be indirectly coupled from the transmitter into the receivers through the formation and borehole environment. The bucking device minimizes the magnitude of the signals that are directly coupled from the transmitter into multiple receivers within the plurality. By varying the current in the bucking device, the bucking device minimizes the magnitude of the directly coupled signal of each receiver in the plurality, and each receiver may utilize a common bucking device.
REFERENCES:
patent: 4264862 (1981-04-01), Koelle et al.
patent: 5065099 (1991-11-01), Sinclair et al.
patent: 5757191 (1998-05-01), Gianzero
patent: 6100696 (2000-08-01), Sinclair
patent: 6600995 (2003-07-01), Strickland et al.
patent: 6606565 (2003-08-01), Strickland et al.
Gao Li
Xiao Jiaqi
Conley & Rose, P.C.
Halliburton Energy Service,s Inc.
Jones Diane E.
Tokar Michael
Tuttle Robert M.
LandOfFree
Method and apparatus for minimizing direct coupling for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for minimizing direct coupling for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for minimizing direct coupling for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3593680