Diamond drilling bit
 Drilling tool / 2246603Drilling toll has body with thread and inner washing channel, as well as matrix, contacting pin by its inner surface and having outer end spherical surface, provided with rock-destroying means. Pin in body is mounted coaxially. Outer end spherical surface of matrix with rock-destroying means is made with diameter equal to outer diameter of drilling toll, and inner surface of matrix and outer surface of pin are made spherical, centers of which coincide with center of outer end spherical surface of matrix. Between inner surface of matrix and spherical pin, balls are mounted in recesses of contact surfaces. Recesses for balls made in matrix are elongated in vertical directions from ball center for distance L=(R+r)tgΨ, where R - radius of pin spherical outer surface, m; r - ball radius, m; Ψ - maximally possible angle of matrix rotation in vertical plane, in degrees. |
 Chisel for core-catching / 2244091Device has body with blades provided with cutters, central aperture for core catcher and apertures for pumping of drilling mud, placed in inter-blade channels of chisel in body wall between central aperture and outer surface of chisel body. Apertures for pumping of solution are made in radial and/or tangential plane in such a way, that distance between central aperture and apertures for mud pumping at input into chisel body is greater, than at output from chisel body. |
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Chisel for core-catching / 2244091 Device has body with blades provided with cutters, central aperture for core catcher and apertures for pumping of drilling mud, placed in inter-blade channels of chisel in body wall between central aperture and outer surface of chisel body. Apertures for pumping of solution are made in radial and/or tangential plane in such a way, that distance between central aperture and apertures for mud pumping at input into chisel body is greater, than at output from chisel body. |
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Drilling tool / 2246603 Drilling toll has body with thread and inner washing channel, as well as matrix, contacting pin by its inner surface and having outer end spherical surface, provided with rock-destroying means. Pin in body is mounted coaxially. Outer end spherical surface of matrix with rock-destroying means is made with diameter equal to outer diameter of drilling toll, and inner surface of matrix and outer surface of pin are made spherical, centers of which coincide with center of outer end spherical surface of matrix. Between inner surface of matrix and spherical pin, balls are mounted in recesses of contact surfaces. Recesses for balls made in matrix are elongated in vertical directions from ball center for distance L=(R+r)tgΨ, where R - radius of pin spherical outer surface, m; r - ball radius, m; Ψ - maximally possible angle of matrix rotation in vertical plane, in degrees. |
 Diamond drilling bit / 2257458Diamond drilling bit comprises body with matrix divided into a number of sections by waterways. Concentric rock-cutting members of diamond bit matrix are provided with cutters made of superhard composite material arranged from end matrix surface and installed in arches of the sections. Distance between cutters decreases from drilling bit periphery co center thereof. |
 Drilling bit with removable members / 2257459Drilling bit comprises body with inner surface, replaceable rock-cutting members connected to holders made as spaced tail pieces and fixer for body and holders fixation. Inner surface of bit body has annular groove. Tail pieces of holders have shoulders made as sectioned inserts with slots on outer surfaces thereof to fit the inserts in annular groove of drilling bit body. Body and tail pieces have beveled end surfaces so that they may cooperate with each other. Fixer is made as a number of radial rivets connecting tail pieces with drilling bit body. |
 Bit / 2263197Bit comprises body with diamond matrix divided in sections by flushing channels, cylindrical cutters made of synthetic diamonds and reinforcing the sections. Synthetic diamond cutters are inclined towards body end and project in respect to the body. Synthetic diamonds are also inclined to matrix ends so that diagonal plane extending through diametrically opposite points of cutter cylinder bases and dividing the cylinder in two halves coincides with matrix plane. Synthetic diamonds have optimal dimensions of 0.07-0.14 of cutter diameter. Area of contact surface defined in matrix section is 1.8-2.4 times greater than summary areas of contact surfaces of the cutters in above section. |
 Thermal-mechanical drilling method and device / 2263758Method involves frictional heating of rock surface layer; separating above layer by cutting and removing the cuttings with flushing liquid. One half of face section corresponding to annular strip with width equal to half of face width is heated by frictional member rubbing. Another half thereof is cooled with flushing liquid. Outer and inner face parts are alternately heated and cooled. Thermal-mechanical drilling device comprises body, frictional members adapted to weaken rock surface layer by heating thereof, cutters and radial channels for flushing liquid. Frictional members and cutters are divided into downhole and core treating sections and have outlines defined in radial sections thereof in face contact area, which coincide with each other in overlapped manner. Non-working faces of frictional members and face form annular channels connected with radial channels for flushing liquid. |
 Drilling bit / 2268348Drilling bit comprises body with slits formed in lower part thereof. The slits are inclined in direction opposite to body rotation direction and divide the body into sectors reinforced with concentrically arranged cutters. The drilling bit also has guiding bush with connection thread arranged in body interior. The sectors are arranged in steps and the leading sectors are reinforced with rock-cutting members having lesser wear resistance and lesser bending resistance in comparison with other drilling bit sectors. To provide this the leading sectors have reduced cross-sections. The cross-sections are reduced by forming unloading radial channels arranged at slit bases or by imparting trapezoid shapes to the leading sectors, wherein the bases of trapezoid sectors are arranged from connection thread side. |
 Diamond crown bit / 2287657Crown includes body and matrix, divided by washing grooves on working sectors of variable length reinforced with cutting elements. Crown is provided with hollow inserts positioned in washing grooves, open on the side of well bottom and made in cross-section in form of circular segments with height, alternating along length. Hollow inserts on portions adjacent to matrix have convex shape, congruent to concave sides of working sectors. |
 Crown bit / 2287658Crown includes body and diamond-containing matrix, divided by washing grooves on sectors, reinforced by external and internal reaming and volumetric diamonds. Special feature of crown is the positioning schematic of reaming diamonds, which in vertical plane in each sector are mounted along inclined line, while beginning of line, positioned in frontal part of sector is shifted along height relatively to another end of line towards connecting thread. |
 Crown bit / 2298077Drilling bit comprises body and matrix separated into sectors with flushing grooves. The sectors are provided with hole-forming, central and core-forming inserts made of superhard alloy and with protective members for hole-forming and core-forming insert protection. The protective members for hole-forming and core-forming inserts are made as bushes with conical apexes and eccentric channels, which are open in outer surface of protective bush. The inserts are arranged in bush interior and are made of wear-resistant material having hardness decreasing from center to periphery thereof. |
FIELD: mining industry, particularly for drilling wells along with coring thereof during solid mineral prospecting.
SUBSTANCE: diamond drilling bit comprises body with matrix divided into a number of sections by waterways. Concentric rock-cutting members of diamond bit matrix are provided with cutters made of superhard composite material arranged from end matrix surface and installed in arches of the sections. Distance between cutters decreases from drilling bit periphery co center thereof.
EFFECT: increased operational reliability and service life.
2 dwg
The invention relates to the mining industry, namely the rock cutting tool to be used when drilling with coring in the exploration for solid minerals and water.
Known drilling crown, comprising a housing with a matrix, separated by flushing channels in the sector. Each sector consists of a diamond-containing layer or stabika soldered to the body of the crown (see ed. Saint of the Russian Federation No. 1570737, CL E 21 10/48).
The disadvantage of the crown is low mechanical speed of drilling.
Known drilling crown with a triangular diamond matrix, which is provided with radial cutting blades, contributing to the preservation of its radial dimensions (see ed. Saint of the Russian Federation No. 1596061, CL E 21 10/48).
A disadvantage of the known crown is a low resource due to the reduced contact area of its rock elements with slaughter and radial non-uniformity of load distribution.
Known drilling crown Portorosa elements which made concentric variable width increasing from the periphery to the center of the crown (see ed. Saint of the Russian Federation No. 1069476, CL E 21 10/48).
A disadvantage of the known crown is a low resource due to the reduced contact area of its rock elements with slaughter.
This crown is selected in the image quality is as prototype.
The aim of the invention is to increase the resource crowns.
This technical result is achieved by the fact that in the diamond drill crown, comprising a housing with a matrix, separated by flushing channels in the sectors of concentric Portorosa elements with the end surface is equipped with cutters of superhard composite material installed over the arc of the sector and of discrete steps, decreasing from the periphery to the center of the crown.
Figure 1 shows a General view of the drilling crown side view in section, figure 2 - view from the side end surface.
The crown includes a housing 1 with a sector matrix 2, Portorosa elements 3, which are made concentric.
In the end surfaces of the elements 3 to the arc length of each sector discretely installed cutters 4 of superhard composite material with a pitch decreasing from the periphery to the center of the crown.
When the crown is accompanied by heating of the rock cutting elements 3 and their wear, the teeth 4, as having higher heat resistance, cut the softened rock in the flushing channel matrix 2, which together with the sludge taken from the bottom of the wash liquid. As wear of the incisor teeth 4 the process will be repeated.
The totality of the work of rock cutting elements 3 and pick 4 contributes to the preservation of the geometry and growth of the resource crowns.
Diamond drilling crown, comprising a housing with a matrix, separated by flushing channels in the sectors and concentric Portorosa elements, characterized in that the concentric Portorosa elements with the end surface is equipped with cutters of superhard composite material installed over the arc of the sector and of discrete steps, decreasing from the periphery to the center of the crown.