Inclinometer

Details Inclinometer Inclinometer

1974-10-02

1976-10-12

Phillips, Charles E.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

73516LM, G01C 906

Patent

active

039849180

ABSTRACT:
Disclosed is an inclinometer particularly adapted for use as a top-hole indicator in drilling operations. The inclinometer employs a ferrofluid in a closed tube; the fluid serves as an angle-sensitive movable core of a differential transformer. The secondary coils of the transformer are wrapped around the tube; the primary coil is wrapped around a core piece or the tube. Equipment is provided for comparing the outputs of the secondary coils to produce an angle signal. A sturdy construction for downhole use is disclosed.

REFERENCES:
patent: 3131565 (1964-05-01), Amlie
patent: 3209600 (1965-10-01), Stiles et al.
patent: 3260121 (1966-07-01), Johnston
patent: 3839904 (1974-10-01), Stripling

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