SU972034A1 - Machine evaluating the efficiency of work of rock-breaking tool - Google Patents

Description

(54) METHOD OF EVALUATING THE EFFICIENCY OF WORK OF THE PREVORIZING TOOL

12

The invention relates to the drilling of 1GO1 rocks.

There is a method for estimating the performance of a rock cutting tool when drilling with npoNHBO Hoft fluid by removing foot prints using plastics. This method is used to study the irregularities of the bottom, which characterize the degree of its destruction by ClJ.

However, the method gives an estimate only of the surface part of the hole or hole, but does not give an idea of the so-called pre-destruction zone. It is known that in the process of drilling homogeneous rocks in the hole bottom two layers are formed: shear and structurally changeable. The second layer, i.e. the pre-destruction zone is. directly under the blade of the drilling tool. It is assumed that the thickness of the second layer is 0.5-4 mm. The deeper and fuller the second layer is worked, the easier it is to remove the drilling tool in the position of the first layer.

The closest to the invention is a method for evaluating the performance of a rock-cutting tool based on research results.

prefracture zones with the use of a flushing fluid, which uses a luminescent emulsion. The study of the predisposition zone is carried out by macro-microanalysis in ultraviolet rays, previously destroyed by the diameter of the rock samples. This method involves the preparation of a rock sample, the destruction of this sample with a tool while simultaneously impregnating the pre-destruction zone with a washing liquid, and studying this C23 zone. However, the known method does not allow determining the penetration depth of the wash liquid directly during the drilling process, without compromising the integrity of the sample, since produced after the time required to remove the sample after drilling and its cutting, during which additional fissure is formed st on the studied place. During this period, the luminescent emulsion continues to penetrate further along the cracks formed during the drilling process and the newly formed cracks created during the process of cutting the sample. In addition, the luminescent emulsion has a higher wettability coefficient than the used washing liquids. These shortcomings, from the actual depth of penetration of the applied liquid into the pre-destruction zone, which is said on the assessment of its accuracy. The object of the invention is to improve the accuracy of the estimate of the pre-destruction area. The goal is achieved by the fact that when preparing a sample of rocks in it, the electrodes of the registering device are installed, then when the sample is destroyed. The depth of liquid penetration into the area of the fracture is determined by the distance passed by the instrument until the first signal of the recording device is fixed. By the nature of the signal, the pre-fracture zone is judged to be fractured. The drawing shows a scheme for measuring the depth of liquid penetration into the pre-dislocation zone. The scheme contains sample 1 of rock, fixed in the nest; electrodes 2 embedded in the sample and fixed therein at a fixed distance from the end surface of the sample ;, drilling tool 3; Amplifier 4 for amplifying the signal of an oscilloscope 5. A lubricating / cooling fluid (coolant) is fed through the hole in the drill rod. These studies under laboratory conditions are carried out according to the following procedure. A large-diameter 131 mm core is drilled from sandstone with f 12 grade on a scale of prof. MM Protod - horse; The core is cut into samples with a height of 150 dm. Then, 12 mm diameter holes were drilled to a depth of 45 wiM in the sample, which were diagrted each other at a distance of L 70 mm from the end surface. The drilling is carried out with a diamond drill at low feed forces so as not to create prefracture zones around these holes. The sample is blown dry with hot air, after which copper electrodes with an appropriate diameter of 12 mm and a height of 80 gm are inserted into the holes. Ei slot between sample and electrode - hall: electrically conductive lacquer based on epoxy resin is applied and held until hardened. The sample is inserted into the well in a massive metal strip. Electrodes 2 are connected through an amplifier to a registering boron 5. In sample 1, experimental drilling is performed using an emulsion tool 3. Water is used as an ESS with added salt to increase electrical conductivity. The conductivity between the electrode .11 is measured by an E5 electrometric amplifier 6 4 and is monitored with an H105 loop oscilloscope 5. During drilling, L, t, e, the depth of penetration of the drilling tool to the first signal (L 67 mm) and the distance L from the end surface of the sample to. They measure the penetration depth: they are liquids - in the pre-destruction zone uLi 70-67 3 mm. The dB value can also be measured as the distance traveled by the instrument from recording the first and last signals (breakage of the electrodes). Then, during the drilling process, the flux penetrates through the received d signal, i.e. by the nature of the received signal, it is possible to judge the fracture of the pre-fracture zone by the depth hl. In comparison with the known method, the accuracy of the pre-fracture zone is improved, since the penetration depth of the prohoboric fluid is determined directly during the drilling process. The technical and economic efficiency of the proposed method lies in the fact that the study of the behavior of the pre-destruction zone introduces a new element. in the theory of destruction, it allows to determine under what modes of operation there is a dry friction between the rock-cutting tool and the rock, and under what modes it is wet, which is necessary for the rational use of the rock-breaking tool. The method of evaluating the performance of a rock-cutting tool, including preparing a sample of a mountain range, destroying this sample with a tool while simultaneously impregnating the area with liquid pre-destruction and studying the fracture of this area, characterized in that, in order to improve the accuracy of the pre-destruction area, preparing the sample of rock in it, the electrodes of the recording device are installed; then, when the sample is destroyed, the penetration depth of the liquid is determined. the pre-destruction zone in the distance traveled by the instrument until the first signal was recorded by the registering instrument, and the nature of the signal determines the pre-fracture zone fracture.

Sources of information taken into account in the examination

1. Kvach V.V. and Sveshnikov I.A., Method for obtaining prints at the face.

Sat Rock-breeding tool, Kiev Technique, 1966.

2. USSR author's certificate in application number 2537944 / 22-03, E 21 B 9/00,: 24L0.77.

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Claims (1)

Claim A method for evaluating the performance of a rock cutting tool, including preparing a rock sample, destroying this sample with a tool while impregnating the pre-fracture zone with flushing liquid and studying the fracture of this aeon, characterized in that, in order to improve the accuracy of assessing the pre-fracture zone, when preparing the sample rocks, the electrodes of the recording device are installed in it, then, when the sample is destroyed, the depth of liquid penetration into the pre-fracture zone is determined by the distance passed by the instrument until the first signal of the recording instrument is fixed, and the fracture of the prefracture zone is judged by the nature of the signal.