Impregnated diamond crown bit. RU patent 2513049.
 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. |
 Crown bit / 2445439Crown bit comprises a body, the working end of which is reinforced with wear-resistant radially arranged inserts with the cylindrical base and a trihedral prismatic blade aligned in parallel to the axis of the cylindrical base and having width that is less than the base diameter, at the same time the wear-resistant inserts are installed in radial slots of congruent shape at the end of the body. The wear-resistant inserts in plan are made as T-shaped. Besides, the transverse part of inserts is arranged at the side of periphery and is equipped at the external side with ledges, at the same time the lower end of the transverse part of each insert is displaced relative to the working edge of the blade towards the side, which is opposite to the bottom hole. Achievement of the specified purpose is also aided by the fact that the prismatic blade is equipped with a cone-shaped section, which connects the longitudinal and the transverse parts of the insert. Ledges on the external surface of the transverse part have in their cross section a wedge-like, or a trapezoidal or a rectangular or a hemispherical shape; besides, ledges are arranged in parallel to the axis of the crown bit casing. |
 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: process engineering.
SUBSTANCE: invention 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.
EFFECT: shorter conformability, longer life.
4 dwg
The invention relates to the production of rock cutting diamond tools, in particular impregnated diamond drill bits used for drilling of boreholes with coring in the exploration of mineral deposits.
Diamond drilling crown ring contains case and divided wash channels segments diamond working layer, including diamond grain, sealed with an adhesive. Usually before you begin crowns its working surface "opened" by grinding in order to ensure the protrusion of diamond grains of a binding material. You can combine the "opening" of the diamond grains with the initial stage of work of the crown, when the working face crowns some time prisobachivaetsya at low speeds of rotation of the crown and low axial effort to ensure the protrusion of a sufficient number of diamond grains on the surface of a binding material and opportunities for further implementation of the process of effective cutting on the recommended drilling. The running-in period drilling crown often takes a considerable amount of time and therefore increases the cost of drilling.
Known technical solutions aimed at the creation of drill bits, break working surface which requires much less time.
Known drilling crown, including housing and solid diamond working layer with wedge-shaped working face, which made sloping flushing grooves. The wedge shape of the face promotes rapid break-in crown and prevents deviation crowns from the axis drilling (SU # 1086112, E21B 10/60, 1983). The lack of crowns is that a pointed top of a working layer wears out quickly and as of wear layer decreases useful volume of flushing grooves. Deteriorating cooling drilling crown and conditions of carrying out of the sludge produced by the crown.
Known drill bits, diamond matrix which is divided into segments flushing grooves. On the desktop side segments performed V-grooves (US №3537538, E21B 10/48, 1970, US no 2011031027, E21B 10/02, 2011, ER №0487355, E21B 10/48, 1992). On the outer and/or inner surfaces of the segments of the established durable items, which are used or high strength of diamond grains, or wear-resistant elements
the rectangular form of polycrystalline diamond material, which are the long side in the direction of the axis of the tool. Wear-resistant elements protect the outer and/or inner diameter of the crown from unacceptable deterioration in diameter. The implementation of the grooves on the working surface crowns accelerates the process of opening the diamond grains, due to the fact that the protruding part V-shaped relief wear out easier and faster at the same time the deepening of the relief are the slots for the flow of coolant in the running-in period crowns. The lack of crowns is that when they break the formed of coarse-grained slurry scores quite shallow deepening V-shaped relief, with deteriorating cooling of the working surface of the crown, the running-in period crowns accompanied temperature spikes, which has a negative effect on the underlying relief under the layers diamond matrix.
Known drilling crown containing diamond segments, work surfaces with a protruding above the surface of the parts, having the form of an ellipse or of the hemisphere (WO №2011020111, E21B 10/48, 2011). The crown also features a wear-resistant elements of the rectangular form, mounted on the outer surface of the segments. Raised areas on the working surface of the segments are substantially reduce the time running crowns. The lack of crowns is that getting the speakers sites on the working surface of the segments is a slow operation, so as to receive them at the bottom of the form in which it is made a crown or a segment of a crown, you must perform a large number of pits, the form of which must match the shape of the speakers areas crowns.
In the known technical solution CN №101705791, E21B 10/46, 2010 prominent areas are in the shape of a triangular pyramid.
The closest one is a technical solution relating to the diamond core bit, containing a circular body and a diamond-bearing layer is divided into segments flushing grooves (SU # 1361295, E21B 10/60, 1984). Segments formed parallel or inclined about the axis of the crown surfaces. In the lower part with outer and inner side of the installed disk-like wear-resistant elements. Sloping surfaces form on the segments thinned part in the initial period of operation crowns (break) due to a smaller area of the contact surface of the segments with the slaughter develop high specific pressure and high temperatures which lead to rapid abrasion thinned part, and at the same time have a negative impact on the underlying diamond-bearing strata with the loss of their strength characteristics. The reduction of the strength characteristics contributes to excessive initial deterioration of the working surface of the crown, reducing the resource of work of the crown as a whole. In addition, wear-resistant elements, made in the form of a disk, are small and therefore protects against wear a limited surface of the working layer. Equipment crowns great number of wear-resistant elements considerably complicates production technology crowns.
Technical task is the creation of drilling crown short time pererabatyvaushsih working surface, and an increased service life, without complicating technology crowns.
The technical problem is solved in that impregnated diamond drilling crown-containing o-ring housing and diamond working layer separated washing the slots on the segments formed parallel to form a working surface inclined about the axis of the crown surfaces, and is equipped with outer and inner side of the wear-resistant elements, sloping surfaces intersect with the working surface of the segments with the formation of a ring on it platforms initial contact crowns with slaughter, with diametrically direction the width equal to 15-35% of maximum width of the segment, and the slopes are angle annular space 7-20°, in addition, wear-resistant elements are made of rectangular forms and are located along the long side of the district the surface of the segment.
Summary of the invention consists in that the size of the ring site and the angle at which are slanted surface segments, provide optimal initial contact crowns with slaughter, so pererabatyvaushsih the working surface of the crown is carried out in a shorter time. At the same time with the optimal initial contact crowns with the bottom surface pressure acting on a working surface of a crown, reduced, decreasing the temperature effect on the diamond-bearing layer, including through heat dissipation for the most surface and, in addition, the lack thinned part on the working surface segments increase the life of the crown. The location of wearproof elements of rectangular form, with the long side along the ring surface segments protect against wear a large area of the cylindrical surface of diamond-bearing layer in contact with the core and the walls of drill holes, which increases the service life of the tool. In addition, given the fact that the diameter of a working layer crowns high demands on precision, and the material from which made of wear-resistant elements, is very difficult, better technology to achieve high precision equipment sector small amount of wear-resistant elements required length, the more of a wear-resistant elements of small size.
Figure 1 shows a longitudinal axial section crowns.
Figure 2 shows a view of the working surface of the crown.
Figure 3 shows the axial section of the sector.
Fig 4 shows a cross-section of sectors And A.
The crown with the help of a carving clip on coring drill pipe installation and tell her rotation and axial load. Diamond-bearing layer comes into contact with the breed and destroy it. At the same time served coolant to cool down crown and wash slots makes up the resulting sludge. Docked at the bottom of the segments of durable items to calibrate the walls of core and borehole, protected segments from excessive wear and tear, keeping the size of the crowns on the outer and inner diameter and not letting the well to Sauromates.
Thus, the circular area on the working surface of the crown with optimal dimensions and wear-resistant elements of rectangular shape located along the long side of the district's surface segment, reduce the time of pererabatyvaushsih working surface crowns and increase the service life without complications technology crowns.
Impregnated diamond drilling crown-containing o-ring housing and diamond working layer separated flushing grooves into segments formed parallel to form a working surface inclined about the axis of the crown surfaces, and is equipped with outer and inner side of the wear-resistant elements, sloping surfaces intersect with the working surface of the segments with the formation of a ring on it platforms initial contact crowns with slaughter, with diametrically direction the width equal to 15-35% of maximum width of the segment, and the slopes are angle annular space 7-20°, in addition, wear-resistant elements are made of rectangular shape and is located along the long side of the district the surface of the segment.