BOREHOLE GEOMETRY TOOL Russian patent published in 2010 - IPC E21B47/08 G01B7/13 

FIELD: measurement equipment.

SUBSTANCE: invention is related to the field of geophysical survey of deep and ultradeep boreholes, may be used in multi-lever geometry tools - scanners for detailed inspection of internal surface quality in casing strings. Geometry tool comprises the following components installed in tight protective jacket - reversible electric motor with gear, output shaft, which is kinematically connected to screw mechanism, including screw, nut and actuator link, which is taken out of jacket with the help of stem with seal, double-arm metering levers, spring-loaded contact parts for interaction with rheocord, which is installed longitudinally on side surface of drum with driving axis. At the same time kinematic joint between output shaft of gear and screw mechanism is created by driving axis of drum, which is rigidly connected to screw, equipped with tailpiece on another side, installed in rotary support. Nut may come out of threaded engagement with screw at its ends and is equipped with two spring-loaded thrusts, which are installed as opposite on one side on driving axis, and on the other side - on tailpiece. At the same time nut is mounted with the possibility of one-degree-of-freedom reciprocal motion and is equipped with traction rods, which are rigidly connected to stem.

EFFECT: simplified design, increased reliability and accuracy of measurements and expansion of functional resources.

4 cl, 1 dwg