SU1350322A1 - Drilling bit - Google Patents

Abstract

The invention relates to the mining industry and m. used in drilling blastholes for low-power complex ore bodies (RT). The purpose of the invention is to exclude the deviation of the bit beyond the limits of the Republic of Tajikistan when meeting with stronger rocks than the ore. The chisel includes a spear-shaped body 1 with inclined ribs 2, having slotted grooves 4. Spring-loaded segments (C) 3 are fixed in them with the possibility of radial movement. On C 3 rock cutting elements are located. When a chisel with a stronger than ore, rock C 3 is pressed into the body of the ribs 2. They slip along the plane of the massif without destroying it. The transition of C 6 to the ore zone is accompanied by their transfer to the working position. The bit shifts towards the ore body. Thus, the exit of the well beyond the limits of the PT circuit is excluded. 2 Il. i oo sd about CA5 N3 Yu

Description

The invention relates to the mining industry, in particular to tools for drilling blastholes in low-power complex ore bodies.

The purpose of the invention is to exclude the deviation of the bit beyond the ore body when meeting with stronger rocks than the ore.

FIG. 1 shows a chisel, cut; in fig. 2 - doMoto in working condition in the borehole bottom, cross section.

The bit includes a housing 1, inclined ribs 2, provided with movably placed and spring-loaded segments 3, which are fixed in the spline grooves 4 of the ribs by means of a locking ring 5. Springs 6 fix the segments in the working position so as to ensure the output of carbide inserts 7 above the plane of the ribs to their full height.

Chisel works as follows.

Before starting work, the bit is fixed on (if necessary, flexible) drilling alloy, and is fed to the bottomhole. The springs 6, having the necessary elasticity, provide for the drilling of the ore massif the fixation of the segments 3 in the ribs 2 of the bits in their working position. When a rotating bit encounters a sturdier than the ore, an array of host rocks 8 under pressure from the latter, the spring-loaded segments 3 are alternately pressed into the body of the ribs to a depth sufficient to eliminate hardness

alloy inserts from the drilling process. The ribs 2 of the bit with recessed segments 3 slide along the plane of the rock mass, which does not collapse. The transition of the segments from the zone of contact with the rock mass into the ore zone is accompanied by their transfer under the action of springs to the working position, and the process of destruction of the ore massif does not stop. The bit under the action of the axial load gradually shifts towards the ore mass. Thus, the possibility of a well escaping outside the contour of the ore body is completely excluded.

5 The proposed bit allows to exclude the well exit outside the contour of the ore body.

Claims (1)

Invention Formula 0 A drill bit, including a spear-shaped body with inclined ribs and transferring elements, characterized in that, in order to prevent the bit from deviating beyond the ore body when 5 meeting with stronger, than ore, rock, s, it is equipped with segments, and the ribs are made with slotted grooves, and the segment is spring-loaded and fixed in the slotted grooves with the possibility of radial movement, and rock-breaking elements are located on segments . Compiled by V. Nikulin Editor N. BobkovTechred I. VeresKorrektor M. Demchik Order 5062/31 Circulation 533 Subscription VNIIPI USSR State Committee on Inventions and Discoveries 1 13035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4 Phage. 2 6