Diamond bore bit. RU patent 2513819.
 Impregnated diamond crown bit / 2513049Invention relates to production of rock crushing diamond tools, that is, impregnated diamond crown bits used in drilling with recovery of core. Proposed crown bit comprises circular body, diamond-bearing working layer separated by flushing grooves to segments. Said segments are composed by parallel surfaces making the working surface inclined to crown bit axis and furnished with wear-resistant elements arranged it its inner and outer sides. Said inclined surfaces cross the segment working surface to make thereon a ring site of initial contact of crown bit with work face of diametral width making 15-35% of the segment maximum width. Note here that said inclined surfaces and said ring site form the angle of 7-20 degrees. Besides, wear-resistance elements are shaped to rectangle and have their long side arranged in circular surface of the segment. |
 Diamond drill crown / 2510450Diamond drill crown includes a housing and a diamond-containing matrix divided with flushing slots into sectors and containing impregnated and intermediate layers, the latter of which has an annular projection interacting with a mating cavity of the impregnated layer. The annular projection of the intermediate layer is made in the form of a sine with amplitude that does not exceed the half width of the matrix; with that, length of each matrix sector comprises at least length of sine wave. |
 Drilling diamond bit / 2496964Drilling diamond bit includes a housing, a matrix separated with flushing slots into working sectors with concave end faces, which are reinforced with cutting elements, and hollow inserts arranged in flushing slots and open on the side of the well working face and made in cross section in the form of annular segments with convex end faces, which are congruent to concave end faces of the sectors. Each sector of the matrix has horizontal channels interconnected with the cavity of hollow inserts; with that, horizontal channels have conical shape, the larger base of which is oriented towards the bit rotation direction. Horizontal channels can be interconnected with the housing cavity through additional channels. |
 Diamond pilot drill bit / 2493351Diamond pilot drill bit comprises a diamond-containing matrix with a pilot, separated by end, internal and external side, inclined and additional cylindrical washing channels into sectors and a body with an external circular bore. Additional cylindrical washing channels reaching into end washing channels are arranged perpendicularly to the working end of the bit and displaced along the radius to the periphery of the matrix pilot, and the diameter of the additional cylindrical channel is determined in accordance with the established dependence, at the same time the total area of transverse sections of inner side washing channels of the bit is found from the rated ratio. Besides, inlet edges of additional cylindrical channels are made as conical with a sharp angle at the top of the cone, and the inclined washing channels are arranged with alternating capacity, which increases towards the external circular bore of the bit body. |
 Drill bit (versions) / 2492308According to the first version a drill bit comprises a bit blank, the end of which is divided by washing slots into sectors, reinforced by well and core-forming inserts, calibrating blades of which are arranged along the inner and outer radii of the bit, besides, well and core-forming blades of inserts in plan have a serrated shape with at least two ledges, axes of symmetry of which cross in the point arranged beyond the outer surface of the bit and displaced relative to the radial plane to the side opposite to the direction of bit rotation. According to the second version a drill bit comprises a bit blank, the end of which is divided by washing slots into sectors, reinforced by paired well and core-forming inserts, calibrating blades of which are arranged along the inner and outer radii of the bit, besides, well and core-forming blades of inserts in plan have a serrated shape, at the same time tops of serrated ledges in paired inserts are directed to opposite sides, besides, in inserts that lead along the bit rotation the tops of ledges are directed to the side opposite to the direction of bit rotation. |
 Diamond crown bit / 2473774Diamond crown bit includes a body and a matrix separated with washing slots into working sectors reinforced with cutting elements in a radial section in the form of a rectangle and rectangular trapezoids, inclined sides of which are directed to opposite sides. All working sectors in the section perpendicular to the radius of the crown are made in the form of a rectangular trapezoid, the inclined face of which is arranged at the incoming side, at the same time working sectors with rectangular cross section are reinforced with inserts from synthetic superhard materials, besides, inserts are arranged in the zone of crossing of the inclined and end surfaces of rectangular sectors with circumference that divides the end of the sector into two parts of equal thickness. The sum of smaller bases of rectangular trapezoids in radial direction may not be more than the width of the matrix end. The inclined incoming face of each sector may be reinforced with diamonds of smaller fraction compared to the horizontal section of the end surface. |
 Diamond crown bit / 2473773Diamond crown bit comprises a body and a diamond-containing matrix separated with washing slots into sectors, every of which is made with external and internal washing slots for the entire height of the matrix. The crown is made with additional washing slots that connect external and internal washing slots and have alternate height increasing from the external slots to the internal ones. Additional slots may be made with a cross section in the form of a segment, the area of which reduces in direction from the inner slot to the external one, at the same time their height may make 0.2-0.5 of the matrix height. |
 Diamond crown bit / 2471957Diamond crown bit comprises a body and a matrix separated by wide and narrow washing slots into working sectors of different length, larger of which are reinforced with large diamonds compared to sectors of smaller length. Sectors of larger length are equipped with communicated additional washing slots at the end and side surfaces and are equipped with well and core-calibrating inserts with a flat side face, every of which is matched with a slack side of additional side slots. As a version, additional washing slots at the end of long sectors are arranged in the form of a spiral of Archimedes, the convex part of which is directed towards the external surface of the crown body. As a version, additional washing slots on side surfaces of long sectors are arranged as inclined to a longitudinal axis of the crown for directing the flow of washing liquid to the side opposite to direction of crown rotation. |
 Diamond crown bit / 2468178Crown bit comprises a body and a diamond-containing matrix separated with washing grooves into sectors reinforced with outer and inner gage and volume diamonds. The feature of the proposed crown bit is the layout of abrasive material arrangement in a reservoir located inside the matrix and arranged at least with one bushing to discharge an abrasive material, at the same time the output part of the bushing in the initial position is covered with a matrix material. The outer surface of the reservoir for an abrasive material may have a biconical shape, and its upper part may be equipped with a pin for rigid connection with the body. The output part of bushings at different sectors may be arranged at a different distance from the matrix end. |
 Drilling bit / 2462578Drilling bit includes bit blank with slots on the end, in each of them there installed is a group of carbide-cutting tools including main cutting tools, well-forming and core-forming cutting tools. Cutting tools of each group are bow-shaped in vertical and horizontal planes. Cutting tools of one group are faced with their convex surface to well axis and cutting tools of the other group - to well walls, at that main cutting tools of one group are installed covering gaps between main cutting tools of neighbouring group. |
 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. |
 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. |
 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.
SUBSTANCE: diamond bore bit comprises a body and a diamond-containing matrix divided by washing slots into sectors and comprising abrasive material placed in reservoirs that have conical shape at the side of the thread, the upper part of which is equipped with a pin for rigid connection with the body, besides, reservoirs are arranged inside the matrix and are made with a bushing for release of abrasive material, the outlet part of which in the initial position is covered with a matrix material. The working end of the sectors is made with several coaxially arranged grooves, and the reservoirs for abrasive material are made with several bushings, the outlet part of which is arranged at ends of ledges formed between coaxial grooves. Outlet ends of bushings may be arranged in the front part of the end of ledges along with rotation between coaxial grooves. The outlet part of bushings at different sectors may be arranged at different distance from the end of the matrix.
EFFECT: increased efficiency of bit operation.
3 cl, 3 dwg
The invention relates to the field of rock cutting tool, namely drilling with diamond crowns weapons for drilling with core selection.
Known drilling crown, including housing, diamond matrix connected with the case privrednim layer and separated flushing grooves on a specific sector (see auth. St. USSR №594291, CL EV 10/48, 1975).
The disadvantage is that the crown is the low penetration rate, especially when drilling on maloabrazyvnym rocks because of the rapid zabolyavaniya diamonds.
Also known diamond drilling crown, including housing with mounting thread and diamond matrix separated flushing grooves on the sectors and containing abrasive material (see auth. St. USSR №1402659, CL EV 10/48, 1988).
This crown, through the use of abrasive material, allows to avoid zabolyavaniya diamonds. However, it does not provide a reliable connection matrix with the case particularly when a significant height of the matrix and vibration drilling tool. All this reduces the effectiveness of the work of the famous crown.
Closest to the proposed technical substance and the achieved result is diamond drilling crown, including housing with mounting thread and matrix separated flushing grooves on the sectors and containing abrasive the material placed in containers that are having on the part of the thread conical shape of the upper part of which is equipped with a pin for rigid connection with the case; and capacity are located inside the matrix and made with Bush for production of abrasive material, the output of which is in the original position blocked matrix material (see RF patent 2468178, CL EV 10/48, 2011).
Among the drawbacks of the crown should be attributed to the relatively high power consumption of the process of destruction of rocks. This is due to an uneven distribution of abrasive material under the side of the crown, leading in some cases, especially in drilling directional wells, to abnormal wear of the matrix.
Therefore the technical result of the invention is to increase the efficiency of crowns by reducing the energy intensity of the process of destruction of rocks.
This technical result is achieved by the diamond drilling crown, including housing with mounting thread and diamond matrix separated flushing grooves on the sectors and containing abrasive material, placed in containers that are having on the part of the thread conical shape of the upper part of which is equipped with a pin for rigid connection with the case; and capacity are located inside the matrix and made with Bush for production of abrasive material, the output of which is in the original position covered matrix material, according to the invention the working face sectors performed with several coaxially placed grooves, and capacity for abrasive material is done with a few bushes, output of which are located at the ends of the ledges formed between a helical grooves.
Achieving the technical result is also that:
- output ends of the sleeves are located in the front in the direction of rotation part of the end of the projections between axial grooves;
- the output part of the sleeves on different sectors is situated at different distances from the end of the matrix.
The invention is illustrated by drawings, where figure 1 shows a General view of the crown in a longitudinal incision; figure 2 - view from the working end; figure 3 - node 1 to 1 on a larger scale.
The proposed drilling crown contains a body 1 with mounting thread 2 and matrix 3 separated flushing grooves 4 to production sectors 5 and containing abrasive 6. Abrasive 6, such as quartz sand, placed in containers 7, located inside the matrix 3. having by thread 2 conical shape of the upper part of which is provided with pins 9 for rigid connection with the case 1. The working ends of sectors 5 performed with several coaxially placed grooves 8 that may be located both concentric and eccentric axis crowns. In this capacity 7 for abrasive 6 performed with several sleeves 11, the number of which corresponds to the number of ring tabs 10, educated axial grooves 8. The output part of the sleeves 11 is located in the front in the direction of rotation of the working part of the end of the tabs 10 that provides guaranteed abrasive 6 for the whole working area of tabs 10. The output of each sleeve 11 in the original position covered matrix material and removed from the plane of the face at a certain height, the value of which is determined by the physical and mechanical properties formations drilled. This height from h-1 to h 2 decreases and increases with decreasing and increasing abrasiveness formations drilled. The less abrasive rocks and faster sapronovana diamonds, the less should be the distance from the end of the sleeve 11 to the end of the matrix 3, conversely, abrazivnie breed, the higher from the end of the matrix 3 is the butt of the Bush 11. In addition, this distance can adjust the amount of abrasive material by moving the ends of the sleeves 11 from the end of the projections on 10 different sectors 5. While the outer surface of the capacity 7 for abrasive 6 preferably biconic form. Accommodation biconical capacity 7 in the matrix 3 increase the reliability of their grip and provides high reliability of fastening of a matrix with 3 housing 1 by creating a locking connection between the upper cone biconical capacity 7 matrix 3.
The principle of operation of diamond crown is the following. Under axial load and torque cutting elements of the matrix 3 embedded in the rock and destroy it. Destroyed breed through the slots 4 are deleted on the day surface. In the process, there is a deterioration of the matrix 3 and when worn on her a given value of crop output ends of the sleeves 11 and abrasive 6 from 7 tanks, evenly distributed around the entire circumference of the matrix 3, begins to act under the end crowns, promoting samazinasanu cutting elements of the matrix 3 and reduce their zabolyavaniya. However due to the location of the output ends of the sleeves 11 at different distances from the bottom, you can provide a measured abrasive 6 for the end crowns.
Thus, the proposed design crowns allows to increase the efficiency of crowns by ensuring a reliable connection matrix with housing and protection of cutting elements of the matrix from zabolyavaniya during the entire period of operation of the crown.
1. Diamond drilling crown, including housing and diamond matrix separated flushing grooves on the sectors and containing abrasive material, placed in containers that are having on the part of the thread conical shape of the upper part of which is equipped with a pin for rigid connection with the case, and capacity are located inside the matrix and made with Bush for production of abrasive material, the output of which is in the original position covered matrix material, wherein the working face sectors performed with several coaxially placed grooves, and capacity for abrasive material made with several sleeves, the output of which are located at the ends of the ledges formed between a helical grooves.
2. Diamond drilling crown according to claim 1, characterized in that the output ends of the sleeves are located in the front in the direction of rotation part of the end of the projections between axial grooves.
3. Diamond drilling crown according to claim 1, characterized in that the output part of the sleeves on different sectors is situated at different distances from the end of the matrix.