Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1986-12-29
1989-08-15
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
324 65P, G01R 2700
Patent
active
048578312
ABSTRACT:
Apparatus and method for investigating a borehole casing. The preferred apparatus generally comprises: a housing which is connected to a cable; sets of electrodes, each set being axially spaced from another set, with the electrodes in each set being circumferentially spaced at an axial depth; a positioning device provided in the housing for bringing the electrodes into contact with the casing; a measuring circuit provided inside of the housing and electrically connected to the electrodes for measuring at least the potential difference of the casing between the electrode locations, wherein the potential difference information is amplified by the measuring circuit, and the amplified information is transmitted through the cable for processing; and a control circuit provided in the housing for controlling the operation of the positioning device and the measuring circuit. Preferably, a digitizing circuit is provided so that the amplified information is digitized before it is transmitted to the surface and processed.
REFERENCES:
patent: 2371658 (1945-03-01), Stewart
patent: 2459196 (1949-01-01), Stewart
patent: 2553350 (1951-03-01), Bayhi
patent: 3167707 (1965-01-01), Oliver
patent: 3548362 (1970-12-01), Blank
patent: 3801924 (1974-04-01), Mueller et al.
patent: 4179652 (1979-12-01), Davis
patent: 4335350 (1982-06-01), Chen
patent: 4431963 (1984-02-01), Walkow
patent: 4431964 (1984-02-01), Walkow
patent: 4468623 (1984-08-01), Gianzero et al.
patent: 4588951 (1986-05-01), Ohmer
Aguilar, J. R., "Redisenan Medidor de Potencial," Petroleo Int. Jan. 1976, pp.33-36.
Aguilar, J. R., "Diseno y Aplicacion de un Dispositivo de Registro de Potencial Diferencial Para Estudio de Fugas de Corriente o Interferencia Exterior en Tuberias de Revestimiento en Pozos Petroleros," Ingenieria Petrolera, Apr. 1975, pp. 159-171.
Kirklen, C. A., "Evaluation and Design Considerations for Cathodic Protection of Well Casings", Proceedings of 17th Annual Appalachian Underground Corrosion Short Course, Engineering Experiment Station Bulletin, No. 106, 1972, pp. 545-554.
Kilpatrick, J. M., "Use of the Casing Potential Profile Test for Well Casing Interference Studies," Paper Presented at Spring Meeting of Southwestern District, API Division of Production, Mar. 1967, pp. 34-39.
"Resistivity Logs", Schlumberger Log Interpretation Principles/Applications, Schlumberger Educational Services, 1987, pp. 69-94.
Davies Dylan H.
Takeda Jiro
Eisenzopf Reinhard J.
Gordon David P.
Harvey Jack B.
Lee Peter Y.
Schlumberger Technology Corporation
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