INCLINOMETER FOR DOWNHOLES Russian patent published in 2009 - IPC E21B47/02 G01C9/00 

FIELD: mining.

SUBSTANCE: invention can be implemented for determination of space position of down boreholes drilled predominantly for driving cutoff and airways rise entries by method of sectional blasting and blasting destruction of ore blocks in clusters of boreholes. The inclinometer contains a case on a logging cable. An electromagnet (EM) and a plumb are assembled axially inside the case on a bracket unit. A needle is connected with a movable core of EM. The logging cable is installed inside a hose with a braiding; viscous liquid is contained leak proof in the cavity of the logging cable. A holder of a paper disk is arranged before a needle point. Also EM is assembled above the bracket unit; and the movable core is designed to travel with the needle upward. The needle has a wedge shape cross section, is equipped with a swivel mechanism and is connected with the movable core by means of a rod. The swivel mechanism is made in form of two washers put on the rod. One washer is rigidly fixed on the rod, while another is fixed on the case of EM. Fiber- like pieces out of elastic material are attached to the first washer at an angle to its lower plane.

EFFECT: simplification of inclinometer design, facilitating determination of azimuth deflection of boreholes, bored in magnet medium of iron ore massif, and expanded technical functions of apparatus due to increased number of measurements per one lowering into borehole.

2 cl, 4 dwg