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

2005-01-18

2005-01-18

Larkin, Daniel S. (Department: 2856)

Measuring and testing

Borehole or drilling

Fluid flow measuring or fluid analysis

C073S152020, C073S152220, C073S152270, C073S152460, C073S152510, C073S152520, C073S152550, C166S250010, C166S250030, C340S853100, C340S854900, C340S855100, C340S855200

Reexamination Certificate

active

06843119

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: 4535843 (1985-08-01), Jageler
patent: 4553428 (1985-11-01), Upchurch
patent: 4741208 (1988-05-01), Vandevier
patent: 5767400 (1998-06-01), Nakano et al.
patent: 5831156 (1998-11-01), Mullins

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