SU448271A1 - Core breaker - Google Patents

Description

s JSS- ™ s Ks Known keonovatrlt. lp i fig laAHrT ° -A ka BB Hflrf, G section along || TKJWS- iiPPsLrirEgl t; .% 15k; KDnnv "®2 ® ° core ring in the S column kit (see core acceptance: f f SI, | n, rg TS el & 5 5 industrial promaochny

Com. FIG. ) t splined protrusions 7 and a boring figure 8, with which the curved ends of the pivotal elements e interact. In the same sub posted slotted body 10 of the drill bit II. The casing 10 is provided with windows b and grooves b for accommodating the axes of the pivotal elements 9.

The body of the valve element 9 is made in the form of a part of a ring (see Fig. 9) with a radius of curvature close to the internal diameter of the housing 10 and has supporting protrusions 12 and a curved part 15. In case 10, the cap 15 is fixed with the stud 10, the material of which has a small specific weight. In the core tube 2 placed the core holder 16.

Burov crown (II) can be cutting-abrasive, single-ball 17 (see FIG. 4) or multi-ball 18 (see FIG. 5), but with the same type of housing. Only plugs 19 (Fig. 4) and 20 (Fig. 5) vary, and an additional core breaker 21 can be used (see Fig. 3).

The cutting portion 22 of the rivet members is reinforced with a wear-resistant material. The inner cavity of the core tube 2 can be filled with an insulating core material, such as paraffin.

The described corenator works as follows.

When the tool is lowered into the borehole, the plug 15 closes the inlet, which prevents sludge from entering the core-receiving tube 2. When supported against the bottom, the pin L4 is cut off,

releasing the plug 15. The drill crown II, together with the core-receiving tube 2, is moved in the axial direction relative to the sub 5 and the housing I. At the same time, the cutting elements 9 occupy a position (see Fig. 6), in which the section of the core-receiving tube 2 completely opens to allow the core to enter -:

During the drilling process, the axial force on the drill bit is transmitted by the end of the sub 5. The core, entering the core tube 2,

promotes traffic jam 15.

When the tool is torn away from the bottom of the figure, the bore 8 acts on the curved part 13 of the pivotal elements 9, turning and

pressing them to the surface of the core. The rotation of the drilling tool leads to the separation of the core (see Figs. 7, 8) from the bottom and to the overlap of the core receiver section.

SUCCESSES INVENTIONS

A core breaker consisting of a body, a core receiver tube and rivet elements made in the form of double-arm levers with curved non-working ends, characterized in that, in order to increase the reliability of the core breaking and holding it, windows are made in the lower part of the core receiver tube and they are installed the axes of the pivotal elements, the bent ends of which interact with the figured boring made on the inner surface of the body.

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Aa

12

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FIG. 2

Bb

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FIG. five

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FIG. 6

15

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