SU30223A1 - Instrument for measuring borehole curvature - Google Patents

Description

Instruments are used to measure the rigging of boreholes in which there are heavy plumb lines making marks on graduated paper. In the proposed device, related to the indicated type of devices, the graduated paper located on the spring-loaded platform is pressed against the tip of the tilt-plate, after being eroded by a 10-inch rod that holds the platform with the paper in the lower position; the acid is poured into the vessel with the rod just before the device is lowered into the well.

, In the drawing, the device is depicted in the vertical section.

On the hinge /, fixed in the protrusion 24 of the cork 2J of the casing 22, free Hang a rigid 2, on the lower end of which a needle 3 is strengthened. there is a platform 5 with a graduated paper circle 7, fixed on the rod 6; the latter can move freely in the vertical direction in the opening of the plug 8 with the influence of the spring 9

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pad 5 tends upward. This movement is prevented by the rod J6, suspended by the ends in the JO and Jf hooks, from which the first is fixed on the lower end of the rod .6 and the second on the fixed leg J2. Leg J2. and the rod 16 is placed in a glass vessel, /, fixed in the casing 25 with cement 77. Acid is poured into the vessel 14, which corrodes the rod 76. When the latter is sufficiently eroded by the kirlota, the platform 5 will spring up by the action of spring 9. Pulling up, the paper circle 7 rests on the tip 3, which will pierce a hole in it, the distance of which from the center of the circle will correspond to the angle of deviation from the vertical (for convenience of reference, circle 7 is divided into concentric circles corresponding to the deviation angle, for example, half a degree). The acid is poured into the vessel 14 (through the hole / 5) just prior to the descent of the device into the well. Its strength, as well as - the thickness of the rod 16 is easy to pick up in such a way that the corrosion of the rod occurs after a time sufficient for the device to fly to the bottom and the master has time to calm down (which takes about 15-20 minutes).

While lifting the device to the top, the platform 5 remains pressed to the tandem 2. Since casing 22 has a notch 19, immediately after removing the device from the casing, the deviation angle from the vertical of tandem 2 can be read, i.e. Marked curve of the well, without additional measurements.

For a new charging device {and the lower cover 25 is unscrewed.,

The subject matter of the invention.

An instrument for measuring the curvature of boreholes with a heavy plumb with a tip for marking on graduated paper, characterized by the use of a spring-loaded platform 5 with a paper circle 7 pressed against the tip of a plate by the action of a spring 9 after being eroded by acid poured into a vessel, 14 rod 16 holding the platform in the lower position ..