SU1615322A1 - Core breaker - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to mining, in particular, to means of capturing and holding core during drilling. The goal is to increase reliability. The core breaker comprises a housing with guide slots in which arcuate plates are placed with core grips at the lower end and coupling elements on the upper end. The cuts are made so that the plates have the ability to move from the outside of the housing on an arcuate path relative to the center of curvature of the plates when interacting with the walls of the well at the time of capturing and detaching the core with a core piece. On the outer side of the plate have a rock-breaking surface for expansion and calibration of the well. 2 Il.

Description

FIELD OF THE INVENTION The invention relates to mining, to means for maintaining a core while drilling exploration wells.

The aim of the invention is to increase reliability.

FIG. 1 shows a core-drill when drilling, section; in fig. 2 - the same, at the time of the capture core .-,

The core breaker includes a housing 1 with guiding elements in the form of slots 2 in the wall of the housing 1. In the slot x 2, carrier armature plates 3 with core grippers are mounted along them - in the form of sharp edges 4 at the lower end and coupling elements - in the form of projections 5 on top end from the outside. The slits 2 allow the carrier plates 3 to move from the outer side of the housing 1 along an arcuate path relative to the center of curvature of the plates, while the plates 3 are made with an outer rock-cutting surface 6. The housing 1 is installed in the column projectile between the core pipe 7 and the rock destructive tool 8.

Kernel works as follows.

Before descending into the well, the plates 3 are installed in the slots x 2 of the housing 1 using bitumen for initial fixation. After descending into the well, the plates 3 are held in the upper position due to contact with the walls of the well. The projections 5 do not allow the plates to be released from the lower slots 2. At the end of the drilling, when the column tube 7 and the body 1 are filled with a core, the projectile is raised. Here, each plate 3, by interacting with the walls of the protrusions 5, enters the internal cavity of the housing 1, cutting the edge 4 into the core, closes the internal cavity of the core slot, holding the core until it reaches the surface. Due to the fact that the plates are equipped with rock-breaking surfaces, and the rotary drilling process, the corer performs the functions of a borehole extender.

Formula of the invention Kernvator, comprising a housing with guiding elements, carrying arcuate plates with guiding elements at the lower end, and coupling elements at the upper one, characterized in that

In order to increase reliability, the guide elements are made in the form of slots in the housing wall with a surface adapted to move the carrier plates on the outside of the housing along an arcuate trajectory relative to the center of curvature of the plates, while the coupling elements are located on the outer side of the carrier plates, and the plates themselves made with external rock cutting. by the surface.

Phage.1

Claims (1)

The claims 5 A core drill containing a housing with guide elements, movable arc-guiding plates along the guide elements with core grabs at the lower end and coupling elements at the upper one, characterized in that, in order to increase reliability, the guide elements are made in the slots in the wall of the housing with a surface made with the possibility of moving the carrier plates from the outside of the housing along an arcuate trajectory relative to the center of curvature of the plates, while the coupling elements are located on the outer side * of the carrier plates and the plates themselves are made with the outer surface of the rock cutting. Figure 1 FIG. 2