A hole-finding apparatus having integrated sensors

Details A hole-finding apparatus having integrated sensors A hole-finding apparatus having integrated sensors

E - Fixed Constructions

21

B

E21B 47/12 (2006.01) E21B 23/14 (2006.01) E21B 47/01 (2006.01) G01V 11/00 (2006.01)

Patent

CA 2222386

Measuring or sensing the downhole environment electrically, acoustically, mechanically, or by nuclear means, of either the borehole fluid or surrounding subsurface strata (the formation), is accomplished while, or during, a hole-finding operation. Combining the ability to measure or sense the downhole or formation environment actively from within (such as by means of a nuclear source/sensor), or as part of a hole-finding apparatus so that such a device can provide both mechanical and sensing functions simultaneously, or serially, is the focus of the present invention. A preferred embodiment integrates a series of electrodes as a probe on the tip of the hole- finding apparatus such that the hole-finder can measure borehole fluid resistivity R m and spontaneous potential S p as it guides the equipment through the borehole.

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