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AssigneeSchlumberger Technology Corporation
InventorsDzevat Omeragic, Jean Seydoux, Richard A. Rosthal
Estimating the term…
A shielding method and apparatus for an antenna disposed on an elongated support adapted for disposal within a borehole. The shield providing predetermined attenuation of one or more electromagnetic energy field components as the field components interact with the shield. The shield composed of a flexible strip or cylindrical body and respectively comprising a transverse conductive element or a transverse slot therein. The shields being adapted to cover an antenna mounted on the support. The shields being compatible for use in conjunction with saddle, tilted coils or multi-layered tri-axial coils to produce a pure transverse magnetic dipole electromagnetic field. The shields are also used in methods for shielding an antenna disposed on a support to provide predetermined attenuation of an electromagnetic field component as the field components interact with the shield.
An apparatus for use with an elongated support that is adapted for disposal within a borehole, said support having a longitudinal axis, comprising:
An apparatus for use with an elongated support that is adapted for disposal within a borehole, said support having a longitudinal axis, comprising:
A system for measuring a property of a subsurface formation, comprising:
A system for measuring a property of a subsurface formation, comprising:
A method for shielding a source or sensor disposed on an elongated support having a longitudinal axis and adapted for disposal within a borehole, comprising mounting a body adapted to form a cylindrical surface on said support to cover said source or sensor, said body having at least one slot formed therein such that said slot is perpendicular to said longitudinal axis, wherein said body provides predetermined attenuation of an electromagnetic field component as said field interacts with said body.
A method for shielding a source or sensor disposed on an elongated support having a longitudinal axis and adapted for disposal within a borehole, comprising mounting a flexible strip on said support to cover said source or sensor, said strip having at least one conductive element disposed therein such that said element is perpendicular to said longitudinal axis, wherein said strip provides predetermined attenuation of an electromagnetic field component as said field interacts with said strip.
Dependencies are inferred from the claim text.