Logging apparatus having a wall engaging pad with longitudinally

Details Logging apparatus having a wall engaging pad with longitudinally Logging apparatus having a wall engaging pad with longitudinally

1991-11-18

1993-03-30

Strecker, Gerard R.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

Using electrode arrays, circuits, structure, or supports

73152, 181102, 250268, 324338, 324374, 367 25, G01V 318, G01V 140, G01V 504, E21B 4900

Patent

active

051987708

ABSTRACT:
The apparatus includes a pad (20) pressed against the wall of a borehole (12), the pad comprising a plurality of detecting devices (42, 43, 44, 45) disposed in alignment along the longitudinal direction of the borehole. Each detecting device includes a housing (112, 113) having complementary ends fitted with electrical connectors. The end of one housing (112) is extended by first skirts (117, 118) suitable for interfitting between second skirts (121) of the complementary end of the housing (113) of an adjacent detecting device. An annular element (111) and screws (120, 122) fixed to complementary ends together thus constituting a rigid pad (20) which can be disassembled.

REFERENCES:
patent: 2708485 (1955-05-01), Vogel
patent: 2994398 (1961-08-01), Engle et al.
patent: 3944910 (1976-03-01), Rau
patent: 4219776 (1980-08-01), Arulanandan
patent: 4588951 (1986-05-01), Ohmer
patent: 4692908 (1987-09-01), Ekstrom et al.
patent: 4958073 (1990-09-01), Becker et al.
patent: 5036283 (1991-07-01), Trouiller et al.
Wharton et al., "Electromagnetic propagation logging, advance in technique and interpretation," SPE 9267, 1980, pp. 1-12.

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