Chisel for core-catching. RU patent 2244091.
 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 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. |
 Drilling bit / 2269634Drilling bit comprises body with cuts made in lower part thereof and inclined in direction opposite to body rotation direction. The cuts divide drilling bit into sectors reinforced with cutters. The drilling bit also has guiding bush arranged in body interior. The bit is provided with additional bush arranged from outer body side and coaxial with guiding bush. The guiding bush has inclined radial channels to communicate bit interior with cavity defined by guiding and additional bushes. Radial channels may be aligned with inclined body cuts. |
 Annular crown bit / 2270317Crown bit comprises body with cuts formed in lower bit part. The cuts are inclined in direction opposite to body rotation direction and divide the crown bit into several sectors reinforced with cutters. The crown bit also has guiding bush arranged inside the body. The guiding bush has safety means to prevent cutters from damage arranged in each body sector in front of the cutters and having dimensions equal to multiple cutting edge width of the cutters defined in direction of crown bit rotation. Each safety means is made as a rod with spherical working head and annular groove or slot created in outer surface thereof for fixer receiving. The fixer is made as retaining corrugated ring. The body has mating axial channel for axially movable rod insertion and annular boring formed in inner body side. The boring crosses axial channels for rods receiving. |
 Drilling bit / 2272119Drilling bit comprises body with cuts made in lower parts thereof. The cuts are inclined and extend in direction opposite to body rotation direction. The cuts divide the bit into several sections reinforced with cutters. Drilling bit also has guide bush arranged in body interior. The cutters have asymmetric wedge-like working heads with cutting edges directed along crown radius and offset from longitudinal cutter axis in crown rotation direction. Front cutter edge is aligned with front wall of the section. |
 Annular drilling bit / 2320845Drilling bit comprises body with longitudinal grooves on outer surface thereof. The longitudinal grooves connect radial body channels and grooves made in working end thereof. The working end is reinforced with well-forming and core-forming cutters displaced relatively diametrical planes, which are parallel to cutting edges thereof, in direction opposite to drilling bit rotation direction. Drilling bit comprises guiding bush arranged on outer body surface and restricted from rotation relatively the body. Inner surface of guiding bush has longitudinal grooves communicated with radial channels of the body and radial grooves of working end. Guiding bush is fixed from rotation relatively the body with splined connection and is provided with sealing unit made as several rings or spring arranged on outer bush surface. |
 Drilling bit / 2347057Present invention pertains to drilling bits, designed for drilling with continuous removal of core material. The drilling bit has housing with a working butt end, reinforced by concentric well-, core-forming and intermediate cutters, and an inner core tube, put inside the housing, and the cavity between them is connected to the annular space by radial channels in the housing. The core-forming cutters are L-shaped. Their transverse part is located on the side of the longitudinal axis of the drill bit. The height of the transverse part and the overall height of the cutters have the following relationship: h≤0.5(H-ΔH), where h is the height of the transverse part of the cutters, H is the overall height of the cutters and ΔH is the height of the cutters, projecting above the butt end. The number of core forming cutters is more than the number of cutters in the adjacent row. Gap a, between the inner surface of the drill bit and the housing, and gap b, between the inner surface of the drill bit and the inner core tube have the following relationship: a=(0.5-0.6)·b. Such a drill bit increases integrity of the core, increases accuracy of locating rocks transported to the drilling interval and increases efficiency of prospecting as a whole. |
 Column drill / 2348788Proposed invention pertains to techniques of drilling large diameter wells in soft and rocky soils, and mainly for constructing building foundations and supports. The technical outcome of the invention is faster drilling of a large diameter well, as well as increased efficiency of extracting drilled rocks from the well. The column drill has a body frame, an outer core tube and an inner core tube arranged coaxially, as well as a device with discs, for pushing out the core. The inner core tube has vertical recesses in which a jumper link is fitted, joining the discs of the device for pushing out the core. The core tubes have rock cutting elements. The column drill has a mechanism for fixing the device for pushing out the core relative the body, which is in form of a spring-loaded pushing device joined by the top part to top and bottom supports and sleeve pieces, and hinged by an axle to the body of a locking device and a fixing member and an actuator arm. The fixing member can be linked to the sleeve piece, while the actuator arm can be linked to the supports of the pusher. |
 Drill bit / 2348789Present invention pertains to drill bits meant for drilling with continuous removal of core material. The drill bit has a body with a working end, which is fitted with well and core-forming cutters, displaced from diametral planes, parallel their cutting edges, to the side opposite the direction of rotation of the drill bit, and slanted radial channels, linking the inner cavity of the body with an annular space through mud outlet grooves at the end of the body. The bottom of the mud outlet grooves at the working end is in form of Archimedes' spiral. Their surface area along the groove on the side of the centre increases according to the following relationship: S1/S2=a·I1/I2, where S1 and S2 - is the cross sectional area of the radial groove at distance I1 and I2 from the outer diameter of the drill bit on the side of the centre, a=(0.9-1.3) is a proportionality constant, which depends on physical and mechanical properties of the drilled rocks and diameter of the drill bit. |
 Bore bit / 2353747Invention refers to bore bits designed for boring with continuous removal of core material. The bore bit consists of a case with a packering unit on exterior surface, of washing radial and lengthwise channels connected with sludge removing slots on its working end armoured with rock destroying elements. The bore bit is equipped with ejectors in form of bent hubs; the inlet part of each is installed in the lengthwise cleaning channel of the case, while the outlet part is flushed in the bottom of the sludge removing slot in an additional slot. The outlet part of the hub is made with smaller cross section in comparison with the inlet part and is directed to the lengthwise axis of the bit. The inlet part of the hub is equipped with a head, is assembled in the middle part of the sludge removing channel and is set off relative to core forming surface of the bit to periphery. The packering unit of the case is made in form of a screw with right-side winding and of a packing element located above the screw. Such design of the bit increases efficiency of its operation. |
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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. |
 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. |
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Drilling bit / 2268348 Drilling 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.
SUBSTANCE: 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.
EFFECT: higher reliability, higher durability, higher efficiency.
6 dwg
The present invention relates to mining and in particular, to the design of buildings bits for coring.
Known drill head for coring /Methodological guide for drilling with coring of oil and gas wells. RD 39-2-399-80, Institute of drilling technology., M., 1982, S. 39, 21/, comprising a housing with a working bodies, the surfaces of which are system end tabs, reinforced small natural diamonds. For pumping drilling mud holes along the core, which entails a large erosion of the core.
You know the bit, taken as a prototype, consisting of a body 1 with blades 2, equipped with cutters 3, the Central opening 4 under carnival and holes 5 for pumping the drilling fluid, placed in megapath channels 6 bits in the housing wall between the Central hole 4 and the outer surface 7 of the casing bit /1 Photo 1, 2. A bit firm “Hughes-Christensen” the United States. Year of fame 2002 or US 4981183, 01.01.1991/.
To ensure continuous operation of the bit it is necessary to ensure good cooling of the cutters 3, located in the Central part of the bit. Therefore, the flushing holes 5 are located on the shortest possible distance from the center of the bit, this leads to a decrease jumper 8, which in turn leads to rapid hydroabrasive wear jumpers especially when using the weighted drilling fluids (see figure 1).
When you wear jumpers increases the flow of drilling fluid through the annular gap formed by the Central bore 4 of the body of the bit and the outer surface of Carnivale, which leads to erosion of the core and thus to reduce the percentage of removal of the core.
The technical problem solved by the invention, stabilization of the flow of the washing solution, acting on the core, improving washing (cooling) of the Central incisors, the reduction of hydroabrasive wear of the housing.
The technical problem is solved in that in the known bit for coring, comprising a housing with blades, equipped with cutters, the Central hole under carnival and holes for pumping drilling fluid, placed in megapath channels bits in the housing wall between the Central hole and the outer surface of the body of the bit, the holes for pumping drilling fluid prepared in such a manner that the distance between the Central hole and the holes for pumping the fluid at the inlet into the casing bit more than at the outlet of the casing bit.
The invention is illustrated in the drawing.
Figure 2. The proposed construction of a bit with Carnivale in the cut - holes are made inclined in a radial plane.
Figure 3 same as figure 2. Holes inclined in the tangential plane.
Figure 4 - cross section a-a figure 3.
Photo 1 - bit company “Hughes-Christensen” the United States. Top view of the prototype.
Photo 2 is the same. Bottom view.
We offer you the bit consists of a housing 1 with blades 2 and placed on them by the cutters 3, in the casing of the Central hole 4 under carnival and openings 5 for pumping the solution posted in megapath channels 6 bits in the housing wall between the Central hole 4 and the outer surface 7 of the casing bit with distance education 8 - jumpers between the Central hole 4 and hole 5 for pumping the fluid at the inlet into the casing bit larger than the distance of 9 at the outlet of the casing bit. In those cases, when the distance between the Central hole 4 and the outer surface 7 of the housing prevents the hole 5 is inclined in a radial plane, they are inclined in the tangential plane, ensuring maximum distance from the center (axis) of the bit at the input, the minimum output from the body of the bit, with a slope in thickness in the area of the body under the blade (see figure 3 and 4).
The device operates as follows.
The flow of washing fluid passes through the holes for pumping the solution - wash holes 5, is output from the housing to cool the cutters Central part of the body. Due to the fact that the holes 5 at the outlet of the housing close to the center of the bit, is the best cooling incisors Central part of the bit, which significantly increases their resistance, and increased jumper 8 significantly reduces erosion of the body of the bit and completely eliminates improve (increase) the flow of the washing solution through the annular gap. This reduces erosion of the core and increases the percentage of its ejection.
Thus, a new set of features bits for coring, namely the implementation of the holes for pumping the solution in such a way that the distance between the Central hole and the holes for pumping the fluid at the inlet into the casing bit more than at the outlet of the casing bit allows to stabilize the flow rate of the washing solution, acting on the core, and improve flushing (cooling) of the Central incisors, as well as to reduce the hydro-abrasive wear on the body of the bit.
The bit for coring, comprising a housing with blades, equipped with cutters, the Central hole under carnival and holes for pumping drilling fluid, placed in megapath channels bits in the housing wall between the Central hole and the outer surface of the housing of the drill bit, characterized in that the holes for pumping the solution is designed as radial and(or) the tangential plane so that the distance between the Central hole and the holes for pumping the fluid at the inlet into the casing bit more than at the outlet of the casing bit.