SU422842A1 - - Google Patents

Description

(54) DEVICE FOR MEASUREMENT OF WELLS DEFORLS

one

The invention relates to mining and can be used to study the stress state, deformations and properties of an array of rocks.

Devices for measuring borehole deformations are known, including measuring transducers of longitudinal and lateral deformations, bridging rods and a thrust mechanism.

Such devices measure deformations only in one plane; which limits the volume of the resulting strain on the stress state of the rock mass at the measurement site. The accuracy of measurements at ethnh devices is low.

In order to increase the volume of received information and increase the accuracy of measurements, the measuring transducers are placed evenly around the perimeter of the well and are kinematically connected through spherical tips with a spring-loaded lock and a movable thrust mechanism of the thrust mechanism.

FIG. 1 shows the proposed device; in fig. 2 is a section along A-A in FIG. one; in fig. 3 is a section along BB in FIG. one.

A device for measuring well deformations consists of a stop tip 1 rigidly connected to the body 2 of a transverse deformometer, a mounting compartment 3, evenly spaced around the circumference of elastic

beams 4 with glued-on strain gauges 5. On the console sections of beams 4 on the screws 6, the onors 7 of the transverse deformometer are hinged.

The housing 2 by means of the shank 8 is rigidly connected to the housing 9 of the longitudinal deformometer, in which there are uniformly located but circumferential guides 10 with placed inside the sliders 11, which have eight fixed 12 and eight stationary 13 removable supports.

Each of the movable removable supports is connected by a rod 14 with a slider 11, and with rollers 15 fastened to an insert 16, which is located in a glass 17, rigidly connected with a fixed relative to the slider AND liner 18. The inserts 16 and 18 are interconnected by screw 19 by an elastic element 20, on both sides of which a strain gauge 21 is glued.

To the body of the crawl) 1a 11 a screw 22 is attached to a bent spring 23, having contact with a spherical tip 24.

The stacks 26 are attached to the guides 10 on both sides of the corners 25, and the spring-loaded lugs 27 are attached to the slider 11, intended for fixing the sliders 11 in the guides 10. A movable pusher 28 of the thrust mechanism 29 with a mounting compartment 29 connected to the shank is placed inside the housing 9 30 and a secondary launcher 31. Case 9 is equipped with a glass 32, inside which a spring-loaded retainer 33 is replaced, a pusher limiter screw 34, and on the side of the shank 30 — two clamping nuts 35 with rubber washers 36 sealing the outgoing cables 37 and 38 The device works as follows. The device is pretressed to the tested diameter of the well, by tube 31 is inserted into the well and moves along it up to the stop of the tip 1 into the bottom of the well. When this movable pusher 28, overcoming the action of the spring-loaded latch 33, squeezes it and its conical part acts through spherical tips 24 and springs 23 on the sliders 11, shifting them in the radial direction until the supports 12 and 13 contact with the walls of the well. Thus, in the on position, all the supports of the longitudinal deformer are in contact with the walls of the well with a pressing force proportional to the bending deformation of the springs 23. The longitudinal deformations of the well are sensed by the strain gauges 21 through the movable onors 13, the rollers 15, the movable liners 16 and the elastic elements 20. The lateral deformations of the well are sensed by strain gauges 5 through supports 7, which are in contact with the walls of the well, screws 6 and elastic beams 4. These deformations are measured by a thermal station, the link with which It is remotely connected through the outgoing cables 37 and 38. The soldering points of the load cell conductors with the Leyla cables are made in the mounting compartments 3 and 29 and filled with fused. waxing If necessary, both longitudinal and transverse deformometers of the device can be used separately, for which they are disconnected at the attachment point of the shank 8 to the body 9. At the same time, the shank 8 allows the transverse deformometer to be connected to the substructure 31, the transverse deformometer adjusts the required borehole diameter is calibrated by screwing in or unscrewing the screws 6 with the supports 7 relative to the elastic beams 4. Subject of the invention A device for measuring well deformations, including measure Longitudinal and transverse strain transducers, ram bars and a thrust mechanism, characterized in that, in order to increase the amount of information received and improve measurement accuracy, transducers are placed equally along the borehole perimeter and kinematically connected through spherical tips with a spring-loaded lock and movable thrust mechanism thrust.

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