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Title: Electromagnetic logging sonde having improved housing

Abstract

Apparatus for communicating electromagnetic energy between a logging tool and a surrounding medium comprise a support member, a radiating/receiving element disposed on one surface of a nonconductive dielectric material having a shape compatible with the shape and dimensions of the support member, a ground plane disposed on the other face of the dielectric opposite the radiating/receiving element and a predetermined distance therefrom, and impedance means, a short circuit in one embodiment, electrically connecting an end of the first element to the second element. The dielectric, radiating/receiving element, and ground plane are carried by the support member, which may be a mandrel or a pad. Various embodiments particularly suitable for use in certain applications and with certain kinds of logging tools are described. Furthermore, related methods for communicating electromagnetic energy between a logging tool and a surrounding medium and related logging tools for investigating the electrical permittivity and/or electrical conductivity of a formation traversed by a borehole are described.

Inventors:
Publication Date:
OSTI Identifier:
5231596
Patent Number(s):
US 4511843
Assignee:
Schlumberger Technology Corporation
Resource Type:
Patent
Resource Relation:
Patent Priority Date: Priority date 15 Oct 1981, France; Other Information: PAT-APPL-311801
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; GEOLOGIC FORMATIONS; INDUCTION LOGGING; WELL LOGGING EQUIPMENT; DIELECTRIC MATERIALS; ELECTRIC COILS; MAGNETIC FIELDS; PROBES; ELECTRIC LOGGING; ELECTRICAL EQUIPMENT; EQUIPMENT; MATERIALS; WELL LOGGING; 440400* - Well Logging Instrumentation

Citation Formats

Thoraval, Y. Electromagnetic logging sonde having improved housing. United States: N. p., 1985. Web.
Thoraval, Y. Electromagnetic logging sonde having improved housing. United States.
Thoraval, Y. Tue . "Electromagnetic logging sonde having improved housing". United States.
@article{osti_5231596,
title = {Electromagnetic logging sonde having improved housing},
author = {Thoraval, Y},
abstractNote = {Apparatus for communicating electromagnetic energy between a logging tool and a surrounding medium comprise a support member, a radiating/receiving element disposed on one surface of a nonconductive dielectric material having a shape compatible with the shape and dimensions of the support member, a ground plane disposed on the other face of the dielectric opposite the radiating/receiving element and a predetermined distance therefrom, and impedance means, a short circuit in one embodiment, electrically connecting an end of the first element to the second element. The dielectric, radiating/receiving element, and ground plane are carried by the support member, which may be a mandrel or a pad. Various embodiments particularly suitable for use in certain applications and with certain kinds of logging tools are described. Furthermore, related methods for communicating electromagnetic energy between a logging tool and a surrounding medium and related logging tools for investigating the electrical permittivity and/or electrical conductivity of a formation traversed by a borehole are described.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {4}
}