RU1788202C - Toggle-type core catcher - Google Patents

Abstract

Usage: capture and core extraction while drilling wells. SUMMARY OF THE INVENTION: the device comprises a clip. Short and long levers with a cutting edge are placed in the cage windows. All short levers are mounted on one half of the circumference of the clip, and long levers on the other. 3 ill.

Description

The invention relates to drilling equipment, in particular to devices for capturing and retrieving core samples.

Knobs containing core and short and long levers with cutting edges located in its windows are known, with short and long levers alternating along the circumference of the holder.

A core core arrester that we have adopted as a prototype is known.

Known lever core grinders, including the prototype, have the disadvantage that when the cutting edges of the levers are introduced into the core when it is torn off, they act on the core symmetrically, evenly and create tension in the core and, after penetration, stretch without creating bending stresses . As a result of this, especially when working in hard rocks, in

which the cutting edges of the arms cannot penetrate, the arms slip along the core, or even break. As a result, the core yield and core stability are reduced.

The aim of the invention is to increase the reliability and stability of the core and increase the yield of core, especially from hard rock, by creating bending stresses in the core when it breaks.

The goal is achieved in that in the lever core corer containing the holder and short and long levers with cutting edges located in the holder windows, all short levers are mounted on one half of the circumference of the core holder and the long ones on the other.

A comparative analysis with the prototype shows that the claimed technical solution differs in that. that all the short levers are mounted on one half of the circumference of the body of the cornhorn body, and the long ones on the other.

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A distinctive feature of the claimed technical solution is that all the short levers are installed on one half of the circumference of the core holder and the long ones on the other, so that when the core drill moves up to break the core, all the short levers transmit force to the core on the one hand, on one level, and all long ones, on the other hand, and on another level, higher. As a result, a bending moment acting on the core is created, the core breaks, is picked up by levers and brought to the surface; The core yield of such a core extractor is higher than that of known ones. Persistence is the same.

Thus, the above feature provides the achievement of the object of the invention.

The proposed lever core-gel is shown in the figures. Figure 1 shows a General view of the core cutter in longitudinal section; figure 2 is a section aa in figure 1; in Fig.Z - core breaker at the beginning of the separation of the core.

The core drill contains a holder 1, in the windows 2 and 3 of which short 4 and long 5 levers with rotary rollers b are placed, brought into horizontal position by springs 7, the levers 4 and 5 with springs 7 are locked in the holder 1 by a ring 8. Since the rollers are located in one the planes, the cutting edges of the long 5 levers are adjacent to the core above the cutting edges of the short 4 levers.

During operation of the core, due to the transfer of force from the levers to the core at different heights, when lifting the core and cutting the levers into the core, a moment is created that bends the core and leads to its fracture. Thanks to this, it is possible to select the core from the strongest rocks, which the levers cannot penetrate, for example in Jespilites.

According to the proposed technical solution, a core drill R31-80 was developed.

The technical advantage of the proposed core drill is to increase the core yield and increase the reliability and stability of the core drill.

A socially useful advantage of the proposed technical solution is a reduction in the terms of exploration and development of new deposits.

Claims (1)

The claims Lever core explorer containing a holder and short and long levers with cutting edges located in the holder windows, characterized in that, in order to increase the reliability and stability of the core breaker and increase the core yield, especially from hard rock, by creating bending roots in the root voltage, all short levers are installed on one half of the circumference of the cage, and long - on the other. phage-i Editor Compiled by V. Galust nts .; Tehred M. Morgenthal Corrector E. Papp