CN111305760A - Split gauge block, manufacturing method and PDC drill bit with gauge block - Google Patents
Split gauge block, manufacturing method and PDC drill bit with gauge block Download PDFInfo
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- CN111305760A CN111305760A CN202010243144.5A CN202010243144A CN111305760A CN 111305760 A CN111305760 A CN 111305760A CN 202010243144 A CN202010243144 A CN 202010243144A CN 111305760 A CN111305760 A CN 111305760A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000002131 composite material Substances 0.000 claims abstract description 20
- 238000005266 casting Methods 0.000 claims description 40
- 208000002925 dental caries Diseases 0.000 claims description 34
- 238000005219 brazing Methods 0.000 claims description 24
- 229910000679 solder Inorganic materials 0.000 claims description 22
- 238000003466 welding Methods 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 11
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- NEIHULKJZQTQKJ-UHFFFAOYSA-N [Cu].[Ag] Chemical group [Cu].[Ag] NEIHULKJZQTQKJ-UHFFFAOYSA-N 0.000 claims description 5
- 230000004907 flux Effects 0.000 claims description 5
- 230000008595 infiltration Effects 0.000 claims description 5
- 238000001764 infiltration Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 230000007704 transition Effects 0.000 abstract description 10
- 238000013461 design Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 2
- 230000036346 tooth eruption Effects 0.000 description 23
- 230000000694 effects Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 238000003892 spreading Methods 0.000 description 4
- 230000007480 spreading Effects 0.000 description 4
- 238000005457 optimization Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
- E21B10/627—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable with plural detachable cutting elements
- E21B10/633—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable with plural detachable cutting elements independently detachable
Abstract
The invention relates to a split type gauge block, a manufacturing method and a PDC drill bit with the gauge block, wherein the split type gauge block comprises a base, a gauge plate and a PDC toothed plate, a sliding groove is formed in the lower end face of the base, a groove is formed in the upper end face of the base, a first through hole is formed in the center of the bottom of the groove, the gauge plate comprises a gauge plate body, blind holes are formed in the centers of two sides of the gauge plate body respectively and are communicated with each other through a second through hole, a plurality of TSP polycrystalline teeth are embedded around the blind holes in two sides of the gauge plate body, the PDC toothed plate comprises a toothed plate body, a plurality of outwards-inclined PDC composite plate teeth are uniformly arranged on two opposite edges of the toothed plate body along the length direction of the edges, and a third through hole and a fourth through hole are formed in the toothed plate body. When the equal transition wearing and tearing of guarantor footpath board and PDC pinion rack, the guarantor footpath board and the PDC pinion rack of more renewing can, such structural design can greatly reduced the change, the cost of maintenance of PDC drill bit.
Description
Technical Field
The invention relates to the technical field of PDC drill bits, in particular to a split gauge block, a manufacturing method and a PDC drill bit with the gauge block.
Background
At present, in oil, natural gas and other prospecting drilling operations, the PDC drill bit is mainly used for drilling operations, the basic structure of the PDC drill bit comprises a joint, a base body, blades and cutting teeth, the rear part of the base body is connected with the joint, the base body is generally integrally formed and can also be connected in a welding mode, the front part of the base body is provided with a diameter protection section, the blades surround the front end of the base body, the cutting teeth are arranged on the blades, and a nozzle communicated with an internal water eye hole is arranged at the position, between two adjacent blades, of the front end of the base body and used for spraying drilling fluid to the cutting teeth.
The gauge protection section of the PDC drill bit is used as an important component of the PDC drill bit and has important influence on the using effect of the drill bit. The gauge protection structure of the PDC drill bit plays a role in righting the drill bit, ensuring the stability of a well wall, the regularity of a well hole and the non-reduction of the well diameter in the drilling process of the drill bit. The gauge block of drill bit all has certain wearing and tearing to the use of going into the well each time of drill bit, leads to the drill bit external diameter to diminish gradually. When the gauge teeth are worn to the extent that the diameter of the borehole is reduced to a value that does not meet the working requirements, the service life of the drill bit is reached, and the drill bit needs to be replaced with a new one. In order to avoid the problem that the whole bit is replaced due to transitional wear of the gauge blocks, the existing PDC bits are movably connected with the bit base body, after the gauge blocks are worn, the gauge blocks are detached, and new gauge blocks are replaced, but different cutting teeth are arranged on the outer end faces and the edges of some gauge blocks, the wear conditions of the cutting teeth at the two positions are different, so that sometimes the cutting teeth on the edges are seriously damaged, the cutting teeth on the outer end faces can be normally used, or the cutting teeth on the outer end faces are seriously damaged, the cutting teeth on the edges can be normally used, and if the whole gauge blocks are replaced, waste is caused to a certain extent.
Disclosure of Invention
The invention aims to solve the technical problem and provide a split gauge block, a manufacturing method and a PDC drill bit with the gauge block.
In order to solve the technical problems, the invention adopts the technical scheme that: a split gauge block comprises a base, a gauge plate and a PDC toothed plate, wherein a sliding groove is formed in the lower end face of the base, a groove is formed in the upper end face of the base, a first through hole is formed in the center of the bottom of the groove, the gauge plate comprises a gauge plate body, blind holes are respectively arranged at the centers of two sides of the gauge plate body, the blind holes at the two sides are communicated through a second through hole, a plurality of TSP polycrystalline teeth are embedded around the blind holes at the two sides of the gauge plate body, the PDC toothed plate comprises a toothed plate body, a plurality of outwards-inclined PDC composite sheet teeth are uniformly arranged on two opposite edges of the toothed plate body along the length direction of the edges, a third through hole and a fourth through hole are arranged on the toothed plate body, the gauge plate can cover the groove of the base, TSP polycrystalline crystals on the lower end face of the gauge plate are arranged in the groove of the base, and the tooth plate body can pass through the third through hole or the fourth through hole through bolts to fix the tooth plate body and the base together.
As the split gauge protection block of the invention is further optimized: the TSP polycrystalline teeth are cylindrical polycrystalline teeth.
As the split gauge protection block of the invention is further optimized: the sliding groove on the lower end face of the base is provided with a dovetail groove.
As the split gauge protection block of the invention is further optimized: and a PDC tooth avoiding groove is formed in the lower part of one side wall of the base.
As the split gauge protection block of the invention is further optimized: the groove on the upper end face of the base is of a step structure.
A manufacturing method of a split gauge block comprises the following steps:
s1: casting a cuboid-shaped base, reserving a step hole at the upper end of the base in the casting process, reserving a dovetail groove at the lower end face of the base, and then processing a threaded blind hole at a position, close to the bottom, on one side of the base in the length direction;
s2: casting a diameter-keeping plate, wherein blind holes are reserved in the centers of the upper end surface and the lower end surface of the diameter-keeping plate respectively in the casting process, a plurality of tooth pockets of TSP polycrystalline teeth are reserved on the upper end surface and the lower end surface around the central blind holes, after the casting is finished, holes are axially punched in the diameter-keeping plate to enable the blind holes on the two sides to be communicated, and finally the TSP polycrystalline teeth are fixedly welded in the tooth pockets;
s3: casting a PDC toothed plate, reserving a plurality of tooth cavities of PDC composite sheet teeth on two opposite edges of the PDC toothed plate along the length direction of the edges in the casting process, and fixedly welding the PDC composite sheet teeth in the tooth cavities after casting is finished;
s4: and clamping the gauge plate into a stepped hole on the upper end surface of the base, and fixing the PDC toothed plate on one side of the base with the threaded blind hole through bolts to obtain the split type gauge block.
As a further optimization of the manufacturing method of the split gauge block: the welding in the steps S2 and S3 is specifically performed by: heating the tooth cavity, spraying and welding the tooth cavity, simultaneously infiltrating brazing filler metal at the bottom and the inner wall of the tooth cavity, then putting the tooth into the tooth cavity, controlling the heating temperature to be 630-650 ℃, simultaneously melting the welding wire at the back of the tooth, stopping heating and pressing the tooth after adjusting the angle of the tooth, finally spraying a small amount of brazing flux and filling the joint with silver solder.
As a further optimization of the manufacturing method of the split gauge block: the infiltration solder is silver-copper solder, and the solder is composed of the following raw materials in percentage by weight: ag55-65%, Cu15-20%, Zn5-10%, Sn5-8% and P3-8%.
As a further optimization of the manufacturing method of the split gauge block: the brazing filler metal also contains 1-5% of liquid metal Ga.
The utility model provides a PDC drill bit with split type gauge block, includes the drill bit main part, and the afterbody of drill bit main part is provided with the bit joint, and the head of drill bit main part is encircleed and is provided with a plurality of blades, and the upper end of every blade all is provided with a plurality of PDC composite sheet teeth, every the equal swing joint in below of blade has split type gauge block, is located and is provided with the guide rail on the bit joint outer wall of blade below, and threaded hole is seted up to the up end of guide rail, split type gauge block's base is established on the guide rail through its spout card, fixes together through fastening bolt between split type gauge block's base, gauge plate and the guide rail, and fastening bolt's head end passes the second through-hole of gauge plate and the threaded hole of the first through-hole screw.
Advantageous effects
1. The split gauge block is divided into a base, a gauge plate and a PDC toothed plate, wherein cutting teeth are arranged at two ends of the gauge plate and the PDC toothed plate, the three parts are detachably connected, when the cutting teeth on the gauge plate are worn in a transition mode, the gauge plate, namely the gauge plate, is turned over to enable the spare cutting teeth to face outwards, when the cutting teeth on the PDC toothed plate are worn in a transition mode, the PDC toothed plate is turned over to enable the spare cutting teeth to face upwards, when the gauge plate and the PDC toothed plate are worn in a transition mode, the gauge plate and the PDC toothed plate which are new are replaced, and due to the structural design, the replacement and maintenance cost of a PDC drill bit can be greatly reduced;
2. in the manufacturing process of the split gauge block, the teeth are brazed by adopting the unique solder, wherein the liquid metal Ga added into the solder can be preferentially diffused in the surface grain boundary of the tooth cavity, the reaction spreading effect is utilized to carry out 'reaction film removal', and in the brazing process, Ga is slowly oxidized to produce a layer of film, so that the local temperature of a brazing position can be increased, and the brazing efficiency and quality are improved.
Drawings
FIG. 1 is a schematic view of the external structure of a split gauge block of the present invention;
FIG. 2 is a schematic view of the internal structure of the split gauge block of the present invention;
FIG. 3 is a schematic structural diagram of a base in the split gauge block of the present invention;
FIG. 4 is a schematic structural view of a gauge plate in the split gauge block of the present invention;
fig. 5 is a schematic structural diagram of a PDC toothed plate in the split gauge block of the present invention;
FIG. 6 is a schematic view of the connection between the split gauge blocks and the drill bit body according to the present invention;
FIG. 7 is a partially enlarged schematic view of the connection between the split gauge blocks and the drill bit body according to the present invention;
FIG. 8 is a schematic structural view of a PDC bit having split gage blocks in accordance with the present invention;
the labels in the figure are: 1. the base, 2, the gauge protection board, 3, PDC pinion rack, 4, fastening bolt, 5, the drill bit main part, 6, the drill bit connects, 7, the wing of a knife, 8, the guide rail, 1-1, the spout, 1-2, the recess, 1-3, first through-hole, 1-4, the PDC tooth dodges the groove, 2-1, the blind hole, 2-2, the second through-hole, 2-3, the TSP glomerocryst tooth, 2-4, the gauge protection board body, 3-1, the pinion rack body, 3-2, the PDC composite piece tooth, 3-3, the third through-hole, 3-4, the fourth through-hole.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1
As shown in fig. 1-6: a split type gauge block comprises a base 1, a gauge plate 2 and a PDC toothed plate 3, wherein a sliding groove 1-1 is formed in the lower end face of the base 1, the sliding groove 1-1 is an assembly dovetail groove which is used for positioning, the base 1 is clamped on a sliding rail of a drill bit through the assembly dovetail groove during installation, and the base is fixed after positioning is completed. The upper end face of the base 1 is provided with a groove 1-2, and the groove 1-2 is a groove 1-2 with a step structure. The bottom center of the groove 1-2 is provided with a first through hole 1-3, the gauge plate 2 comprises a gauge plate body 2-4, blind holes 2-1 are respectively arranged at the centers of two sides of the gauge plate body 2-4, the blind holes 2-1 at the two sides are communicated through a second through hole 2-2, a plurality of TSP polycrystalline teeth 2-3 are embedded in the two sides of the gauge plate body 2-4 around the blind holes 2-1, the TSP polycrystalline teeth 2-3 are cylindrical polycrystalline teeth, the gauge plate body 2-4 can be clamped into an upper layer groove of the groove 1-2 and is supported through a step of the groove, and the TSP polycrystalline teeth 2-3 at the lower end face of the gauge plate body 2-4 are embedded into a lower layer groove of the groove 1-2 at the moment. The PDC toothed plate 3 comprises a toothed plate body 3-1, a plurality of outwards-inclined PDC composite sheet teeth 3-2 are uniformly arranged on two opposite edges of the toothed plate body 3-1 along the length direction of the edges, the two rows of PDC composite sheet teeth 3-2 are in diagonal symmetry, and a third through hole 3-3 and a fourth through hole 3-4 are formed in the toothed plate body 3-1. The toothed plate body 3-1 can pass through the third through hole 3-3 or the fourth through hole 3-4 through the fastening bolt 4 to be fixed with the base 1, the lower portion of one side wall of the base 1 is provided with a PDC tooth avoiding groove 1-4, and the PDC tooth avoiding groove 1-4 facilitates hiding of the unused PDC composite sheet tooth 3-2. When the toothed plate body 3-1 needs to be turned over, the toothed plate body is fixed on the base 1 through the third through hole 3-3 or the fourth through hole 3-4, a threaded blind hole is formed in the side wall of the base 1 corresponding to the through hole, and the toothed plate body is fixed together with the threaded blind hole through the through hole by the fastening bolt 4.
The split gauge block is divided into a base, a gauge plate and a PDC toothed plate, wherein cutting teeth are arranged at two ends of the gauge plate and the PDC toothed plate, the three parts are detachably connected, when the cutting teeth on the gauge plate are worn in a transition mode, the gauge plate, namely the gauge plate, is turned over to enable the spare cutting teeth to face outwards, when the cutting teeth on the PDC toothed plate are worn in a transition mode, the PDC toothed plate is turned over to enable the spare cutting teeth to face upwards, when the gauge plate and the PDC toothed plate are worn in a transition mode, the gauge plate and the PDC toothed plate which are new are replaced, and due to the structural design, the replacement and maintenance cost of a PDC drill bit can be greatly reduced.
Example 2
A manufacturing method of a split gauge block comprises the following steps:
s1: casting a cuboid-shaped base, reserving a step hole at the upper end of the cuboid-shaped base in the casting process, reserving a dovetail groove on the lower end face of the cuboid-shaped base, and then processing a threaded blind hole at a position close to the bottom of one side in the length direction;
s2: casting a diameter-keeping plate, wherein blind holes are reserved in the centers of the upper end surface and the lower end surface of the diameter-keeping plate respectively in the casting process, a plurality of tooth pockets of TSP polycrystalline teeth are reserved on the upper end surface and the lower end surface around the central blind holes, after the casting is finished, holes are axially punched in the diameter-keeping plate to enable the blind holes on the two sides to be communicated, and finally the TSP polycrystalline teeth are fixedly welded in the tooth pockets;
the welding in the steps S2 and S3 is specifically performed by: heating the tooth cavity, spraying and welding the tooth cavity, infiltrating brazing filler metal at the bottom and the inner wall of the tooth cavity, putting the tooth into the tooth cavity, controlling the heating temperature to be 640 ℃, melting the welding wire at the back of the tooth, adjusting the angle of the tooth, stopping heating, pressing the tooth, spraying a small amount of brazing flux, and filling the joint with silver solder.
The infiltration solder is silver-copper solder, and consists of the following raw materials in percentage by weight: ag60%, Cu15%, Zn10%, Sn5%, P5% and liquid metal Ga 5%. Liquid metal Ga added into the solder can be preferentially diffused on the surface grain boundary of the tooth cavity, reaction and film removal are carried out by utilizing the reaction spreading effect, and in the brazing process, Ga is slowly oxidized to produce a layer of film, so that the local temperature of a brazing position can be improved, and the brazing efficiency and quality are improved.
S3: casting a PDC toothed plate, reserving a plurality of tooth cavities of PDC composite sheet teeth on two opposite edges of the PDC toothed plate along the length direction of the edges in the casting process, and fixedly welding the PDC composite sheet teeth in the tooth cavities after casting is finished;
s4: and clamping the gauge plate into a stepped hole on the upper end surface of the base, and fixing the PDC toothed plate on one side of the base with the threaded blind hole through bolts to obtain the split type gauge block.
Example 3
A manufacturing method of a split gauge block comprises the following steps:
s1: casting a cuboid-shaped base, reserving a step hole at the upper end of the cuboid-shaped base in the casting process, reserving a dovetail groove on the lower end face of the cuboid-shaped base, and then processing a threaded blind hole at a position close to the bottom of one side in the length direction;
s2: casting a diameter-keeping plate, wherein blind holes are reserved in the centers of the upper end surface and the lower end surface of the diameter-keeping plate respectively in the casting process, a plurality of tooth pockets of TSP polycrystalline teeth are reserved on the upper end surface and the lower end surface around the central blind holes, after the casting is finished, holes are axially punched in the diameter-keeping plate to enable the blind holes on the two sides to be communicated, and finally the TSP polycrystalline teeth are fixedly welded in the tooth pockets;
the welding in the steps S2 and S3 is specifically performed by: heating the tooth cavity, spraying and welding the tooth cavity, infiltrating brazing filler metal at the bottom and the inner wall of the tooth cavity, putting the tooth into the tooth cavity, controlling the heating temperature to be 630 ℃, melting the welding wire at the back of the tooth, stopping heating and pressing the tooth after adjusting the angle of the tooth, and finally spraying a small amount of brazing flux and filling the joint with silver solder.
The infiltration solder is silver-copper solder, and consists of the following raw materials in percentage by weight: ag55%, Cu20%, Zn8%, Sn7%, P6% and liquid metal Ga 4%. Liquid metal Ga added into the solder can be preferentially diffused on the surface grain boundary of the tooth cavity, reaction and film removal are carried out by utilizing the reaction spreading effect, and in the brazing process, Ga is slowly oxidized to produce a layer of film, so that the local temperature of a brazing position can be improved, and the brazing efficiency and quality are improved.
S3: casting a PDC toothed plate, reserving a plurality of tooth cavities of PDC composite sheet teeth on two opposite edges of the PDC toothed plate along the length direction of the edges in the casting process, and fixedly welding the PDC composite sheet teeth in the tooth cavities after casting is finished;
s4: and clamping the gauge plate into a stepped hole on the upper end surface of the base, and fixing the PDC toothed plate on one side of the base with the threaded blind hole through bolts to obtain the split type gauge block.
Example 4
A manufacturing method of a split gauge block comprises the following steps:
s1: casting a cuboid-shaped base, reserving a step hole at the upper end of the cuboid-shaped base in the casting process, reserving a dovetail groove on the lower end face of the cuboid-shaped base, and then processing a threaded blind hole at a position close to the bottom of one side in the length direction;
s2: casting a diameter-keeping plate, wherein blind holes are reserved in the centers of the upper end surface and the lower end surface of the diameter-keeping plate respectively in the casting process, a plurality of tooth pockets of TSP polycrystalline teeth are reserved on the upper end surface and the lower end surface around the central blind holes, after the casting is finished, holes are axially punched in the diameter-keeping plate to enable the blind holes on the two sides to be communicated, and finally the TSP polycrystalline teeth are fixedly welded in the tooth pockets;
the welding in the steps S2 and S3 is specifically performed by: heating the tooth cavity, spraying and welding the tooth cavity, infiltrating brazing filler metal at the bottom and the inner wall of the tooth cavity, putting the tooth into the tooth cavity, controlling the heating temperature to be 650 ℃, melting the welding wire at the back of the tooth, adjusting the angle of the tooth, stopping heating, pressing the tooth, spraying a small amount of brazing flux, and filling the joint with silver solder.
The infiltration solder is silver-copper solder, and consists of the following raw materials in percentage by weight: ag65%, Cu20%, Zn5%, Sn5%, P4% and liquid metal Ga 1%. Liquid metal Ga added into the solder can be preferentially diffused on the surface grain boundary of the tooth cavity, reaction and film removal are carried out by utilizing the reaction spreading effect, and in the brazing process, Ga is slowly oxidized to produce a layer of film, so that the local temperature of a brazing position can be improved, and the brazing efficiency and quality are improved.
S3: casting a PDC toothed plate, reserving a plurality of tooth cavities of PDC composite sheet teeth on two opposite edges of the PDC toothed plate along the length direction of the edges in the casting process, and fixedly welding the PDC composite sheet teeth in the tooth cavities after casting is finished;
s4: and clamping the gauge plate into a stepped hole on the upper end surface of the base, and fixing the PDC toothed plate on one side of the base with the threaded blind hole through bolts to obtain the split type gauge block.
Example 5
As shown in fig. 7 and 8: the PDC drill bit with the split gauge protection block comprises a drill bit main body 5, a drill bit joint 6 is arranged at the tail of the drill bit main body 5, a plurality of blades 7 are arranged at the head of the drill bit main body 5 in a surrounding mode, and a plurality of PDC composite blade teeth 3-2 are arranged at the upper end of each blade 7. The drill bit joint comprises a cutter blade 7, a split gauge block and a guide rail 8, wherein the split gauge block is movably connected below the cutter blade 7, the outer wall of the drill bit joint 6 below the cutter blade 7 is provided with the guide rail 8, the upper end surface of the guide rail 8 is provided with a threaded hole, a base 1 of the split gauge block is clamped on the guide rail through a chute 1-1 of the split gauge block, the base 1 of the split gauge block, a gauge plate 2 and the guide rail 8 are fixed together through a fastening bolt 4, and the head end of the fastening bolt 4 sequentially penetrates through a second through hole 2-2 of the gauge plate 2 and a first through hole 1-3 of the base 1 and is screwed into.
The PDC drill bit is at the in-process of creeping into, when the cutting teeth transition wearing and tearing on the gauge plate, will protect the gauge plate promptly the turn-over make reserve cutting teeth outwards can, when the cutting teeth transition wearing and tearing on the PDC pinion rack, overturn the PDC pinion rack make reserve cutting teeth up can, when the equal transition wearing and tearing of gauge plate and PDC pinion rack, more renew the gauge plate and PDC pinion rack can, such structural design can greatly reduced the change of PDC drill bit, cost of maintenance.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (10)
1. A split gauge block, its characterized in that: the anti-theft device comprises a base (1), a gauge protection plate (2) and a PDC toothed plate (3), wherein a sliding groove (1-1) is formed in the lower end face of the base (1), grooves (1-2) are formed in the upper end face of the base (1), first through holes (1-3) are formed in the center of the bottom of each groove (1-2), the gauge protection plate (2) comprises a gauge protection plate body (2-4), blind holes (2-1) are formed in the centers of two sides of the gauge protection plate body (2-4), the blind holes (2-1) in the two sides are communicated through second through holes (2-2), a plurality of TSP polycrystalline teeth (2-3) are embedded in the two sides of the gauge protection plate body (2-4) around the blind holes (2-1), the PDC toothed plate (3) comprises a toothed plate body (3-1), and a plurality of outwards-inclined TSP polycrystalline teeth are uniformly arranged on two opposite edges of the toothed plate body (3-1) along the length direction of the edges PDC composite sheet tooth (3-2), be provided with third through-hole (3-3) and fourth through-hole (3-4) on pinion rack body (3-1), but gage plate (2) lid is established at recess (1-2) department of base (1), and TSP polycrystalline tooth (2-3) of gage plate (2) lower extreme face all arrange in recess (1-2) of base (1), and pinion rack body (3-1) accessible fastening bolt (4) pass third through-hole (3-3) or fourth through-hole (3-4) with it together fixed with base (1).
2. The split gage block of claim 1, wherein: the TSP polycrystalline teeth (2-3) are cylindrical polycrystalline teeth.
3. The split gage block of claim 1, wherein: the sliding groove (1-1) on the lower end face of the base (1) is an assembly dovetail groove.
4. The split gage block of claim 1, wherein: and a PDC tooth avoiding groove (1-4) is formed in the lower part of one side wall of the base (1).
5. The split gage block of claim 1, wherein: the groove (1-2) on the upper end surface of the base (1) is a groove (1-2) with a step structure.
6. A manufacturing method of a split gauge block is characterized in that: the method comprises the following steps:
s1: casting a cuboid-shaped base, reserving a step hole at the upper end of the base in the casting process, reserving a dovetail groove at the lower end face of the base, and then processing a threaded blind hole at a position, close to the bottom, on one side of the base in the length direction;
s2: casting a diameter-keeping plate, wherein blind holes are reserved in the centers of the upper end surface and the lower end surface of the diameter-keeping plate respectively in the casting process, a plurality of tooth pockets of TSP polycrystalline teeth are reserved on the upper end surface and the lower end surface around the central blind holes, after the casting is finished, holes are axially punched in the diameter-keeping plate to enable the blind holes on the two sides to be communicated, and finally the TSP polycrystalline teeth are fixedly welded in the tooth pockets;
s3: casting a PDC toothed plate, reserving a plurality of tooth cavities of PDC composite sheet teeth on two opposite edges of the PDC toothed plate along the length direction of the edges in the casting process, and fixedly welding the PDC composite sheet teeth in the tooth cavities after casting is finished;
s4: and clamping the gauge plate into a stepped hole on the upper end surface of the base, and fixing the PDC toothed plate on one side of the base with the threaded blind hole through bolts to obtain the split type gauge block.
7. The manufacturing method of the split gauge block of claim 6, wherein: the welding in the steps S2 and S3 is specifically performed by: heating the tooth cavity, spraying and welding the tooth cavity, simultaneously infiltrating brazing filler metal at the bottom and the inner wall of the tooth cavity, then putting the tooth into the tooth cavity, controlling the heating temperature to be 630-650 ℃, simultaneously melting the welding wire at the back of the tooth, stopping heating and pressing the tooth after adjusting the angle of the tooth, finally spraying a small amount of brazing flux and filling the joint with silver solder.
8. The manufacturing method of the split gauge block of claim 7, wherein: the infiltration solder is silver-copper solder, and the solder is composed of the following raw materials in percentage by weight: ag55-65%, Cu15-20%, Zn5-10%, Sn5-8% and P3-8%.
9. The manufacturing method of the split gauge block of claim 8, wherein: the brazing filler metal also contains 1-5% of liquid metal Ga.
10. The utility model provides a PDC drill bit with split type gauge block, includes drill bit main part (5), and the afterbody of drill bit main part (5) is provided with bit joint (6), and the head of drill bit main part (5) is encircleed and is provided with a plurality of blades (7), and the upper end of every blade (7) all is provided with a plurality of PDC composite sheet teeth (3-2), its characterized in that: the split gauge protection block of claim 1 is movably connected below each blade (7), a guide rail (8) is arranged on the outer wall of the drill bit joint (6) below the blades (7), a threaded hole is formed in the upper end face of the guide rail (8), the base (1) of the split gauge protection block is clamped on the guide rail through a sliding groove (1-1) of the base, the gauge protection plate (2) and the guide rail (8) of the split gauge protection block are fixed together through a fastening bolt (4), and the head end of the fastening bolt (4) sequentially penetrates through a second through hole (2-2) of the gauge protection plate (2) and a first through hole (1-3) of the base (1) and is screwed into the threaded hole of the guide rail (8).
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| CN111305760B (en) | 2020-09-08 |
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Denomination of invention: The invention relates to a split diameter retaining block, a manufacturing method and a PDC bit with the diameter retaining block Effective date of registration: 20211222 Granted publication date: 20200908 Pledgee: Weifang rural commercial bank Limited by Share Ltd. hi tech sub branch Pledgor: WEIFANG SHENGDE PETROLEUM MACHINERY MANUFACTURING CO.,LTD. Registration number: Y2021980015963 |
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Granted publication date: 20200908 Pledgee: Weifang rural commercial bank Limited by Share Ltd. hi tech sub branch Pledgor: WEIFANG SHENGDE PETROLEUM MACHINERY MANUFACTURING CO.,LTD. Registration number: Y2021980015963 |