Apparatus for measuring and recording data from boreholes

Details Apparatus for measuring and recording data from boreholes Apparatus for measuring and recording data from boreholes

1998-09-18

2000-12-12

Larkin, Daniel S.

Measuring and testing

Borehole or drilling

Fluid flow measuring or fluid analysis

7315254, 7315246, 3408531, 3408551, 3408552, E21B 4700, E21B 4704, E21B 4706

Patent

active

06158276&

ABSTRACT:
For collecting data from a water well, down-hole sensors are housed in modules. The modules are arranged to be screwed together in-line to form a vertical string. Mechanically, the modules are secured to each other only by the screw connection. Data is transmitted to the surface on a 2-wire cable, there being no other electrical connection between the modules and the surface. The modules are connected in multi-drop configuration to the 2-wire cable. Data is transmitted using time-division multiplexing.

REFERENCES:
patent: 4015194 (1977-03-01), Epling
patent: 4828051 (1989-05-01), Titchener et al.
patent: 5278550 (1994-01-01), Rhein-Knudsen et al.
patent: 5294923 (1994-03-01), Juergens et al.
patent: 5811894 (1998-09-01), Buyers et al.

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