Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent
1982-04-16
1985-08-20
Strecker, Gerard R.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
336 84R, 343841, G01V 330, H01Q 152
Patent
active
045367140
ABSTRACT:
The disclosed invention is suited for use in conjunction with a borehole logging device wherein transmitting and receiving antenna coils are wound on insulating media around the axis of a support means that includes an elongated electrically conductive pipe. In accordance with the invention there is provided a shield for shielding each coil of the device, the shield being adapted to reduce spurious electromagnetic field components (especially transverse magnetic components) while not substantially interfering with the desirable transverse electric components. The shield for each coil comprises a hollow closed-end cylinder mounted on the pipe and surrounding the coil, the cylinder being formed of an electrically conductive material and having a series of equally spaced slots therein. Each slot extends radially outward from the support means along a plane which passes substantially through the axis of the pipe so as to pass through the ends and sides of the cylinder. The defined slots in the cylinder thereby form a series of elongated cylindrical side sections, each of which is joined to the pipe by a pair of opposing end sectors.
REFERENCES:
patent: 1652227 (1927-12-01), Zuschlag
patent: 1747983 (1930-02-01), McCarthy
patent: 2018080 (1935-10-01), Martienssen
patent: 2623923 (1952-12-01), Zimmerman
patent: 2722657 (1955-11-01), Janssen
patent: 2757738 (1956-08-01), Ritchey
patent: 2964698 (1960-12-01), Lehmberg
patent: 3094658 (1963-06-01), Bravenec et al.
patent: 3114875 (1963-12-01), Haagensen
patent: 3411111 (1968-11-01), Meyers
patent: 4209747 (1980-06-01), Huchital
patent: 4319191 (1982-03-01), Meador et al.
Borst Stephen L.
Novack Martin M.
Schlumberger Technology Corporation
Strecker Gerard R.
LandOfFree
Shields for antennas of borehole logging devices does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Shields for antennas of borehole logging devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shields for antennas of borehole logging devices will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-563138