Stuck point indicating device with linear sensing means

Details Stuck point indicating device with linear sensing means Stuck point indicating device with linear sensing means

G - Physics

08

C

340/135.7

G08C 21/00 (2006.01) E21B 47/09 (2006.01) G01B 7/24 (2006.01) G01B 7/26 (2006.01)

Patent

CA 1228137

ABSTRACT A device for determining the stuck point of a drill pipe in a bore- hole consisting of two relative movable sections, anchoring means for each section, a sensing means for detecting relative movement of the two sections producing an inductance representative of the movement. The inductance is transformed into a frequency modulated signal which transmitted to the surface and converted from non linear direct current voltage representation of relative movement to linear direct current voltage. -10-

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