RU157794U1 - DRILL BIT - Google Patents

Abstract

1. A drill bit containing a core ring with a connecting thread and an end part with an end, an outer and an inner surface, flushing grooves dividing the end part into sectors reinforced by bore-forming and core-forming inserts, respectively, located along the inner and outer radii of the end part, placed in series alternating on separate sectors and vertically located, flushing grooves located between the wellbore and core-forming inserts, characterized in that the end surface of the end part has a stepped shape formed by flushing grooves, the outer surface of the end part is ribbed, formed by protrusions of sectors, the inner surface of the end part is smooth, octagonal-shaped carbide cutters having the same shape are used as wellbore and core forming inserts sharpening angle and located so that the vertices of the faces of the bore-forming cutters protrude beyond the outer edge of the outer surface the vertices of the faces of the core-forming incisors protrude beyond the outer edge of the inner surface by an amount “a” of equal size, and the flushing grooves having the shape of a trapezoid are inclined from the larger base of the trapezoid to its smaller base with an inclination angle that is a continuation of the sharpening angle of the well-forming and core-forming incisors. 2 . The drill bit according to claim 1, characterized in that an alloy of tungsten-cobalt group VK8-VK.3 is used as a hard alloy for bore-forming and core-forming cutters. Drill bit

Description

The utility model relates to a rock cutting tool, namely to crowns intended for core drilling of exploration wells in abrasive rocks of category VIII-IX according to drillability.

Known impregnated diamond drill bit containing an annular body and a diamond-bearing working layer, divided by flushing grooves into segments formed by parallel and forming the working surface inclined surfaces relative to the axis of the crown, and provided with wear-resistant elements on the outer and inner sides, the inclined surfaces intersect with the working surface of the segments with the formation on it of the annular platform of the initial contact of the crown with the face, and the wear-resistant elements are made rectangular Flax shape and arranged along the long side of the circumferential surface of the segment, RU №2513049 C1, E21B 10/48, 20.04.2014.

Known drill bit containing a housing mounted on the end of a diamond-containing matrix, divided by flushing grooves into the working sectors, RU No. 2513882 C1, E21B 10/48, 04/20/2014; RU No. 2513819 C1, E21B 10/48, 04/20/2014; RU No. 2510450 C1, E21B 10/48, 03/27/2014; RU No. 2496964 C1, E21B 10/48, 10.27.2013; RU No. 2473774 C1, E21B 10/48, 01/27/2013; RU No. 2473773 C1, E21B 10/48, 01/27/2013; RU No. 2471957 C1, E21B 10/48, 01/10/2013; RU No. 2468178 C1, E21B 10/48, 11.27.2012; RU No. 2445438 C2, E21B 10/48, 03.20.2012; RU No. 2440480 C1, E21B 10/48, 01.20.2012; RU No. 2430233 C1, E21B 10/48, 09/27/2011; RU No. 2418938 C2, E21B 10/48, 05.20.2011; RU No. 2394147 C1, E21B 10/48, 07/10/2010; RU No. 2373371 C2, E21B 10/48, 11/20/2009; RU No. 2373370 C2, E21B 10/48, 11/20/2009; RU No. 2367764 C1, E21B 10/48, 09/20/2009; RU No. 2332556 C1, E21B 10/48, 08.28.2008; RU No. 23033119 C1, E21B 10/48, 07.20.2007; RU No. 2298079 C1, E21B 10/48, 04/27/2007; RU No. 2298078 C1, E21B 10/48, 04/27/2007; RU No. 2298077 C1, E21B 10/48, 04/27/2007; RU No. 2287658 C1, E21B 10/48, 11.20.2006; RU No. 2230174 C2, E21B 10/48, 10.06.2004; RU No. 148333 U1, E21B 10/48, 12/10/2014; RU No. 42851 U1, E21B 10/48, 12.20.2004.

A well-known diamond drill bit, comprising a housing and a diamond-containing matrix mounted on it, divided into borehole and core drilling sectors shifted in radius and height and staggered to form hydraulic chambers mated with flushing grooves, while core drilling sectors are made ahead of height with respect to the borehole and are separated from each other by flushing grooves with different height side walls, and the hydraulic chambers are paired with nearby about the circumference of the flushing grooves and have a through message with them, RU No. 2203381 C2, E21B 10/48, 04/27/2003.

Known crowns with a diamond-containing matrix are distinguished by the properties of the matrix material and the grain size of the diamonds, as well as the number of layers: single-layer with the arrangement of layers according to a certain pattern and impregnated with diamonds of small fractions distributed throughout the volume and have individual use.

Known annular drill bit containing a housing with a connecting thread, divided by washing channels into sectors that are equipped with cutters reinforced with carbide inserts, RU No. 2506399 C1, E21B 10/02, 02/10/2014; RU No. 2443847 C1, E21B 10/02, 02.27.2012; RU No. 2422613 C1, E21B 10/48, 06/27/2011; RU No. 2359103 C1, E21B 10/48, 06/20/2009; RU No. 2359101 C1, E21B 10/02, 06/20/2009; RU No. 2353748 C1, E21B 10/02, 04/27/2009; RU No. 2082867 C1, E21B 10/02, 06/27/1997; RU No. 47042 U1, E21B 10/02, 08/10/2005; RU No. 40076 U1, E21B 10/02, 08/27/2004; RU No. 35123 U1, E21B 10/48, 12/27/2003.

Known drill bit containing a housing with flushing channels and protrusions on the working end, core-forming and central carbide cutters that form a step-shaped annular face while drilling, while core-forming cutters are made in the form of solid plates with a width greater than the thickness of the crown body by the amount of required ring gaps and are a support for adjacent to them on the running side of the cut-in central n-sided incisors having a significantly smaller cross section and protruding above the blade stinchatyh cutters, RU №16175 U1, E21B 10/02, 10.12.2000.

Known drill bit containing a crown ring, the end of which is divided by flushing grooves into sectors reinforced with borehole and core forming cutters, RU No. 2489563 C1, E21B 10/02, 08/10/2013; RU No. 2487227 C1, E21B 10/02, 07/10/2013; RU No. 2462578 C1, E21B 10/02, E21B 10/48, 09/27/2012; RU No. 2348789 C1, E21B 10/02, 03/10/2009; RU No. 2347057 C1, E21B 10/02, 02/20/2009; RU No. 2332555 C1, E21B 10/48, 08.28.2008; RU No. 2320845 C1, E21B 10/02, 03/27/2008.

SM and CA crowns are screwed to the core tube, which are a hollow cylinder, on one side of which a ribbon thread is cut, finger alloy is soldered with a wire, snab- .; ; .

Known carbide self-sharpening crown ST2, made in accordance with GOST 11108-70, reinforced with octagonal cutters G5303, used for core drilling of rocks of category 5-6 for drillability, and consisting of a body with slurry and flushing grooves and soldered main and additional cutters from solid VK8 alloy in GOST 3882-67, e-koronki.html.

Known crowns are designed for drilling wells with coring and have a narrow focus on the use depending on the physicomechanical properties of the drilled rocks.

A drill bit is known that contains a core ring with a connecting thread and an end part with an end, outer and inner surfaces, flushing grooves that form sectors when the end part is divided, reinforced with bore-forming and core-forming inserts, respectively, located along the inner and outer radii of the end part and placed at sequential alternation in separate sectors and vertically located flushing grooves located between the borehole and core samples with inserts, RU No. 2492308 C1, E21B 10/48, 09/10/2013.

This technical solution is taken as the closest analogue of this utility model.

In the drill bit of the closest analogue, the sectors are reinforced with bore-forming and core-forming inserts with blades having a sawtooth plan with at least two protrusions, which improves the efficiency of the crown, but narrows the operational capabilities and reduces its strength characteristics.

The present utility model is based on solving a problem that allows to increase operational capabilities, reduce the energy intensity of the drilling process and increase the strength characteristics of the crown.

The technical result of this utility model is to reduce the cost of well drilling and increase the mechanical drilling speed, to improve drilling due to the same angle of sharpening of the cutters and to perform flushing grooves by continuing the angle of sharpening of the cutters, to increase the destructive ability and to enable drilling of harder rocks due to the end surface is stepped, the outer surface is ribbed, the inner surface is smooth and the use of octagonal cutters to increase the crown resistance to wear due to the use of hard alloy cutters with increased resistance, the implementation of flushing grooves inclined in the form of a trapezoid improves the cooling of the cutters during operation, in obtaining a well of a given diameter due to protrusions by the value of "a" of the vertices of the cutter faces beyond the outer edge of the crown ring.

According to a utility model, this problem is solved due to the fact that the drill bit contains a core ring with a connecting thread and an end part with end, outer and inner surfaces.

The drill bit contains flushing grooves dividing the end part into sectors.

Sectors are reinforced with borehole and core core inserts.

Well-forming and core-forming inserts are located, respectively, along the inner and outer radii of the end part and are placed in successive alternation on separate sectors.

Well-forming and core-forming inserts are located vertically.

The drill bit contains flushing grooves located between the borehole and core-forming inserts.

The end surface of the end part has a stepped shape formed by flushing grooves.

The outer surface of the end part is ribbed, formed by protrusions of sectors.

The inner surface of the end part is smooth.

As well-forming and core-forming inserts, octagonal-shaped carbide cutters having the same sharpening angle were used.

The bore-forming and core-forming inserts are arranged in such a way that the vertices of the faces of the bore-forming incisors protrude beyond the outer edge of the outer surface and the vertices of the faces of the core-forming cutters protrude beyond the outer edge of the inner surface by an equal dimension “a”.

The flushing grooves are trapezoidal, made oblique from the larger base of the trapezoid to its smaller base with an inclination angle that is a continuation of the sharpening angle of the bore-forming and core-forming cutters.

In addition, an alloy of tungsten-cobalt group VK8-VK or group VK10KS is used as a hard alloy for borehole and core-forming cutters.

In addition, the value of "a" has a size of not less than 0.5 mm.

The applicant has not identified sources containing information on technical solutions identical to this utility model, which allows us to conclude that it meets the criterion of "novelty."

The essence of the utility model is illustrated by drawings, which depict:

in FIG. 1 - Drill bit, general view;

in FIG. 2 - Drill bit, plan view;

in FIG. 3 - Section AA in FIG. 2;

in FIG. 4 - Section BB in FIG. 2;

in FIG. 5 - Section BB in FIG. 2;

in FIG. 6 - Node G in FIG. 2;

in FIG. 7 - Node D in FIG. 2;

in FIG. 8 - Drill bit, reproduction.

The drill bit contains:

Crown ring - 1,

connecting thread (rings 1) - 2,

end part (rings 1) - 3,

stepped end surface (parts 3) - 4,

smooth inner surface (parts 3) - 5,

ribbed outer surface (parts 3) - 6.

Washing grooves (parts 3) - 7,

Sectors (formed by grooves 7) - 8,

ledges (sectors 8 form a surface 6) - 9.

Bore-forming cutters in the shape of an octagon (sectors 8) - 10.

Core-forming cutters in the shape of an octahedron (sectors 8) - 11.

The vertices of the faces (incisors 10) - 12.

The vertices of the faces (incisors 11) - 13.

Wash grooves in the form of a trapezoid (part 3) - 14.

The drill bit contains a core ring 1 with a connecting thread 2 and an end part 3 with an end 4, an outer 6 and an inner 5 surfaces, flushing grooves 7 dividing the end part 3 into sectors 8, and flushing grooves 14.

The crown ring 1 is made of steel grade 45.

Connecting thread 2 according to GOST 6238-77 is made for connection to a core-receiving pipe (not shown).

Sectors 8 are reinforced with borehole and core-forming inserts.

Well-forming and core-forming inserts are located on the inner and outer radii of the end part 3, are placed in sequential alternation on individual sectors 8 and are arranged vertically.

Wash grooves 14 are located between the borehole and core-forming inserts.

The end surface 4 of the end part 3 has a stepped shape formed by flushing grooves 7.

The outer surface 6 of the end part 3 is made ribbed, formed by the protrusions of 9 sectors 8.

The inner surface 5 of the end part 3 is made smooth.

As well-forming and core-forming inserts, cutters 10 and 11 of a solid alloy of an octagonal shape, respectively, were used.

An alloy of the tungsten-cobalt group VK8-VK or VK10KS group is used as a hard alloy for bore-forming 10 and core-forming 11 incisors.

Bore-forming cutters 10 and core-forming cutters 11 have the same sharpening angle.

The sharpening angle of the bore-forming 10 and core-forming 11 cutters has a size ranging from 16 to 20 degrees and depends on the type of destructive rocks.

The bore-forming 10 and core-forming 11 incisors are arranged in such a way that the vertices of the faces 12 of the bore-forming incisors 10 protrude beyond the outer edge of the ribbed outer surface 6 and the vertices of the faces 13 of the core-forming incisors 11 protrude beyond the outer edge of the smooth inner surface 5 by an equal dimension “a”. The value "a" has a size of at least 0.5 mm, is determined structurally and depends on the installation dimensions.

The flushing grooves 14 are trapezoidal, made oblique from the larger base of the trapezoid to its smaller base with an inclination angle that is a continuation of the sharpening angle of the bore-forming 10 and core-forming 11 incisors.

The use of a drill bit is as follows.

The drill bit is used for core drilling exploration wells.

The core ring 1 is connected to the core pipe by means of a connecting thread 2 and lowered into the well as part of the drill.

The surface mud pump is turned on, which supplies the flushing fluid to the well.

The rotational mechanism is set in motion.

Borehole cutters 10, cooled by flushing fluid and mounted vertically, provide a given borehole diameter and the required drilling depth.

Core-forming cutters 11, cooled by washing liquid and mounted vertically, provide a core of undisturbed structure.

In the process of drilling, they monitor the operation of the pump and maintain the specified drilling mode.

After filling the core pipe with a core, they begin to raise the drill.

During the hoisting operations, the drill is removed to the surface.

The declared drill bit differs from the closest analogue.

The execution of the end surface of the end part in a stepped form, the outer surface of the end part - ribbed, the inner surface of the end part - smooth and the use of octagonal cutters increases the destructive ability, provides the possibility of drilling harder rocks, increases the mechanical drilling speed, which reduces the energy consumption of the process.

Performing the same angle of sharpening of the cutters, making flushing grooves by continuing the angle of sharpening of the cutters, performing protrusions of the vertices of the faces of the cutters beyond the outer edge of the crown ring increase the operational capabilities.

The implementation of the flushing grooves inclined in the shape of a trapezoid for better cooling of the cutters during operation and the use of a more resistant alloy (VK8-VK and VK10KS) compared to a conventional alloy (VK-8) increases the wear resistance of the crown and increases the strength characteristics of the crown.

The claimed drill bit (TK-10 116) was manufactured industrially by Drilling Technologies Plant LLC and the pilot work on drilling exploration wells determines, according to the applicant, that its criterion is “industrial applicability”.

Claims (4)

1. A drill bit containing a core ring with a connecting thread and an end part with an end, an outer and an inner surface, flushing grooves dividing the end part into sectors reinforced by bore-forming and core-forming inserts, respectively, located along the inner and outer radii of the end part, placed in series alternating on separate sectors and vertically located, flushing grooves located between the wellbore and core-forming inserts, characterized in that the end surface of the end part has a stepped shape formed by flushing grooves, the outer surface of the end part is ribbed, formed by protrusions of sectors, the inner surface of the end part is smooth, octagonal-shaped carbide cutters having the same shape are used as wellbore and core forming inserts sharpening angle and located so that the vertices of the faces of the bore-forming cutters protrude beyond the outer edge of the outer surface top faces kernoobrazuyuschih cutters protrude beyond the outer edge of the inner surface by an amount "a" of equal size, and fluid passages having a trapezoid shape are inclined from a larger to a smaller base of the trapezoid with its base an angle of inclination being a continuation of the angle grinding and skvazhinoobrazuyuschih kernoobrazuyuschih incisors. 2. The drill bit according to claim 1, characterized in that an alloy of tungsten-cobalt group VK8-VK is used as a hard alloy for borehole and core forming cutters. 3. The drill bit according to claim 1, characterized in that an alloy of tungsten-cobalt group VK10KS is used as a hard alloy for borehole and core forming cutters. 4. The drill bit according to claim 1, characterized in that the value of "a" has a size of not less than 0.5 mm

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