Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Patent
1984-05-31
1988-04-19
Strecker, Gerard R.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
With radiant energy or nonconductive-type transmitter
336 84C, 343842, G01V 328, H01F 1504, H01Q 152, H01Q 704
Patent
active
047392720
ABSTRACT:
A wall-engaging apparatus for microinductively investigating a characteristic of an earth formation traversed by a borehole comprises an antenna set mounted in an longitudinally elongated body adapted for a sliding engagement with the wall of the borehole. The antenna set includes a transmitter antenna mounted in the body for coupling electromagnetic energy into a formation; a receiver antenna for sensing a signal indicative of the characteristic; and at least one electroquasistatic shield element mounted coaxially with the magnetic dipole axis of the transmitter antenna. The electroquasistatic shield element comprises a sheet of conductive, non-magnetic material having a conductive center; a first annular band of narrow ray-like conductive segments, each of the conductive segments thereof integrally extending radially from the conductive center and being spaced from adjacent conductive segments by respective narrow radially-extending spaces originating in and traversing the first annular band; and preferably but not necessarily a second annular band of ray-like conductive segments, the conductive segments thereof integrally extending radially in pairs from a respective one of the conductive segment of the first annual band, and being spaced from adjacent pairs of conductive strips of the second annual band by respective longitudinal spaces originating in the first annular band and from one another by a narrow radially-extending space originating in and traversing the second annular band.
REFERENCES:
patent: 2264318 (1941-12-01), Lee
patent: 2582314 (1952-01-01), Doll
patent: 2749503 (1956-06-01), Doll
patent: 2785396 (1957-03-01), Carter
patent: 2987668 (1961-06-01), Goudouin
patent: 3013102 (1961-12-01), Doll
patent: 3060373 (1962-10-01), Doll
patent: 3094658 (1963-06-01), Bravenec et al.
patent: 3376950 (1968-04-01), Grine
patent: 3388323 (1968-06-01), Stripling
patent: 3519919 (1970-07-01), Rance
patent: 3526874 (1970-09-01), Schwartz
patent: 3539911 (1970-11-01), Youmans
patent: 3564914 (1971-02-01), Desai et al.
patent: 3626279 (1971-12-01), Walden
patent: 3808520 (1974-04-01), Runge
patent: 3826973 (1974-07-01), Pflaum
patent: 3882374 (1975-05-01), McDaniel
patent: 3973181 (1976-08-01), Calvert
patent: 4019126 (1977-04-01), Meador
patent: 4251773 (1981-02-01), Cailliau et al.
patent: 4255711 (1981-03-01), Thompson
patent: 4302723 (1981-11-01), Moran
patent: 4305115 (1981-12-01), Armitage
patent: 4334271 (1982-06-01), Clavier
patent: 4348748 (1982-09-01), Clavier et al.
patent: 4355357 (1982-10-01), Chan
patent: 4360777 (1982-11-01), Segesman
patent: 4422043 (1983-12-01), Meador
patent: 4451812 (1984-05-01), Vescovi et al.
patent: 4453219 (1984-06-01), Clavier et al.
patent: 4489274 (1984-12-01), Berlincourt
patent: 4511842 (1985-04-01), Moran et al.
patent: 4514693 (1985-04-01), Meador
patent: 4529938 (1985-07-01), Hagiwara
patent: 4536714 (1985-08-01), Clark
patent: 4578645 (1986-03-01), Hoehn
Fons, Lloyd, "New Dipmeter Tool Logs in Nonconductive Mud," The Oil and Gas Journal, Aug. 1, 1966, pp. 124-126.
Chew Weng C.
Clark Brian
Griffin Douglas D.
Kleinberg Robert L.
Carrol David H.
Lee Peter Y.
Schlumberger Technology Corporation
Strecker Gerard R.
LandOfFree
Apparatus for microinductive investigation of earth formations w does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for microinductive investigation of earth formations w, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for microinductive investigation of earth formations w will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2178248