SU1460173A1 - Core drill - Google Patents

Abstract

The invention relates to a drilling technique and is intended for coring drilling. The goal is to increase the durability of the bit in the work. It comprises a housing 8 with flushing channels 9 and outer sections 4 with trunnions 5. On the latter, well-forming 6 and core-forming 3 shingles are mounted, respectively. Axles axle 5 mesh, Yena in the horizontal plane. The axes of the trunnions 5 of the two cutters 6 and the adjacent cutters 3 have an angular displacement opposite to the diametrical axis of symmetry of the oppositely arranged cutters 3 and 6. One of the cutters 6 has a peripheral rock crown, and the other is peripheral and adjacent to it destroys the crowns. In the process of drilling, the cutters 3 and 6 destroy the annular sections of the bottom, forming the walls of the well and the core column, respectively. 2 Il.

Description

The invention relates to drilling equipment, and in particular to a rock-breaking tool for coring.

The purpose of the invention is to increase the durability of the bit.

In FIG. 1 shows a core bit, a General view, in section; in FIG. 2 - arrangement of cones.

The bit consists of an inner section 1 with three trunnions 2, on which core-forming cones 3 are installed, outer sections 4 with trunnions 5 and bore-forming cones 6, three plates 7 and a casing 8 with flushing channels 9.

him half

The axis of the trunnions 5 of two bore-forming cones 6 and adjacent two core-forming cones 3 are displaced by an acute angle opposite to the diametrical axis of their symmetry. The axles of the trunnions of all cones intersect with the axis of rotation of the core bit.

Well-forming cones I and II (Fig. 2) are armed respectively only on the peripheral and adjacent to the crowns, and cone III is armed

In the process of drilling, borehole and core-forming cones destroy the annular sections of the face, forming respectively the walls of the well and the core column. Flushing fluid to the bottom of the well is fed through channels 9.

Claims (1)

Claim A core bit containing a body with flushing channels, inner and outer sections with trunnions on which are mounted. Well and core forming cones, respectively, axes of core forming cones are offset in the horizontal plane, characterized in that, in order to increase the durability of the bit, the axis of trunnions two core-forming and adjacent two bore-forming cones have an angular displacement opposite to the diametrical axis of symmetry of oppositely located cones, one of the bore-forming of the cone has a peripheral rock-cutting crown, while the other one has a peripheral rock-cutting adjacent to Tehred I. Veres Circulation 514 Proofreader N. King Subscription