CN110593768B - Size-adjustable drill bit - Google Patents
Size-adjustable drill bit Download PDFInfo
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- CN110593768B CN110593768B CN201911015586.8A CN201911015586A CN110593768B CN 110593768 B CN110593768 B CN 110593768B CN 201911015586 A CN201911015586 A CN 201911015586A CN 110593768 B CN110593768 B CN 110593768B
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- 230000036346 tooth eruption Effects 0.000 claims abstract description 39
- 238000005520 cutting process Methods 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims 1
- 238000010030 laminating Methods 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 26
- 239000011435 rock Substances 0.000 abstract description 11
- 239000003208 petroleum Substances 0.000 abstract description 2
- 230000003044 adaptive effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a drill bit, in particular to a size-adjustable drill bit, and belongs to the technical field of petroleum drilling. The cutting diameter of the cutting teeth on the blades can be changed by aligning the stepped through holes on the blades with different threaded holes on the bosses, so that drilling tasks with multiple sizes can be met; the cutter wings provided with the cutting teeth are fixed on the convex parts of the drill bit body through screws, the cutting teeth on the cutter wings are seriously abraded, so that the diameter of a drilled hole is reduced, the standard cannot be reached, the whole drill bit does not need to be replaced, and only the cutter wings with the cutting teeth need to be replaced; the adjusting mechanism drives the gauge protection part to move by rotating the rotary drum so that the gauge protection size of the gauge protection part is adaptive to the cutting diameter of the cutting teeth on the blade, and the locking block is simultaneously in threaded connection with the rotary drum and the fixed drum to fix the rotary drum so as to prevent the gauge protection size of the gauge protection part from changing; the drill bit body is rotatably provided with a central drill bit and is used for cutting rocks at the center of a borehole so as to improve the drilling efficiency at the center of the borehole, thereby improving the drilling efficiency of the whole drill bit.
Description
Technical Field
The invention relates to a drill bit, in particular to a size-adjustable drill bit, and belongs to the technical field of petroleum drilling.
Background
The oil drill bit is an important tool for oil drilling, is used for drilling oil when oil is extracted, and the working performance of the oil drill bit directly influences the drilling quality, the drilling efficiency and the drilling cost, wherein the PDC drill bit is a drill bit which is widely applied at present. The blades and the bit body of the conventional PDC bit are mostly of an integrated structure, and the whole bit needs to be replaced when the diameter of a drilled hole is reduced and the drilled hole cannot reach the standard due to serious abrasion of cutting teeth on the blades along with the increase of drilling total amount, so that the cost is high; in addition, the size of the existing PDC drill bit is not adjustable, the same drill bit can only drill a borehole with a fixed size, and the drill bits with different sizes need to be replaced for drilling tasks with different sizes, so that how to provide a size-adjustable drill bit with detachable blades is a technical problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
In view of the above, the technical problems to be solved by the present invention are: how to provide a size-adjustable drill with detachable blades.
In order to achieve the purpose, the invention provides a size-adjustable drill bit which comprises a threaded connection part, a shell fixedly connected below the threaded connection part and uniformly distributed with three through holes in the circumferential direction, and a drill bit body fixedly installed below the shell, wherein the shell is provided with three radial-movable gauge protection parts through an adjusting mechanism, and the drill bit body is fixedly provided with detachable blades with adjustable cutting diameters.
Preferably, the drill bit body includes that the surface is fixed for central part, the circumference of sphere central part outer wall and is provided with the bellying of equidistant screw hole, screw hole on the bellying by the bellying extends to the extension line of central part and screw hole all passes through the centre of sphere of drill bit body, the surface of bellying be with the concentric sphere of centre of sphere of central part, the internal surface of wing with the central part cooperation, the wing inboard set up with bellying complex recess, the outside sets up cutting teeth and ladder through-hole, the extension line process of ladder through-hole on the wing the centre of sphere of drill bit body just the wing passes through the fix with screw on the bellying.
Preferably, the gauge protection part comprises a plate-shaped gauge protection part body protruding outwards and two rollers symmetrically arranged on two sides of the gauge protection part body and rotatably connected with the gauge protection part body, the diameter of each roller is equal to the thickness of the gauge protection part body, and gauge protection teeth are arranged on the outer side surface of the gauge protection part body.
Preferably, the three through holes on the shell are rectangular holes.
Preferably, the adjusting mechanism comprises a rotating drum with external threads arranged above, the lower end of the rotating drum is fixedly connected with a rotating disc uniformly distributed with three sliding chutes, the sliding chutes on the rotating disc extend in an inclined manner from outside to inside, connecting lines at two ends of the sliding chutes do not intersect with the central line of the rotating disc, the lower end of the rotating disc is rotatably connected with the bottom end of the shell through a second bearing, movable rods are connected in the three sliding chutes on the rotating disc, the upper ends of the movable rods sequentially penetrate through a lower fixed disc, a T-shaped rod slidably mounted on the lower fixed disc, an upper fixed disc and a T-shaped rod slidably mounted on the upper fixed disc, the outer ends of the T-shaped rods are fixedly connected with sliding blocks, the outer ends of the sliding blocks matched with rectangular holes in the shell are fixedly connected with the diameter-protecting part, the lower end face of the upper fixed disc, the lower end face of the lower fixed disc is in clearance fit with the rotary disc, the rotary drum is rotatably connected with the support through a first bearing, the support is fixed on the inner wall of the shell, the support is fixedly connected with a fixed cylinder which is sleeved on the rotary drum in an empty mode, and the rotary drum and the fixed cylinder are fixedly connected with the locking block at the same time.
Preferably, the movable rod includes the rectangle piece that slides on the carousel upper chute and with lower fixed disk, T type pole, upper fixed disk fixed connection's cylinder section, the rectangle piece with the cylinder section rotates to be connected, the cross-section of T type pole is T type and upper end width is less than the lower extreme width.
Preferably, the sliding block is matched with the rectangular hole in the shell and always slides in the rectangular hole in the shell.
Preferably, the circumference of the upper end face of the upper fixed disk is uniformly distributed three T-shaped grooves matched with the T-shaped rods, through holes for accommodating the cylindrical sections of the movable rods are formed in the bottoms of the T-shaped grooves, and the upper fixed disk is the same in structure as the lower fixed disk and is higher than the lower fixed disk.
Preferably, an upper threaded hole matched with the upper end of the rotary drum and a lower threaded hole matched with the upper end of the fixed drum are formed in the locking block, and the diameter of the upper threaded hole is smaller than that of the lower threaded hole.
Preferably, the size-adjustable drill bit further comprises a center drill bit, the center drill bit is rotatably connected with the hole in the drill bit body through a third bearing, the center drill bit comprises a rotating connecting portion rotatably connected with the drill bit body, the lower end of the rotating connecting portion is fixedly connected with the center drill bit body, a wear-resistant layer is arranged on the outer wall of the center drill bit body, a planar cutting tooth and a conical cutting tooth are radially arranged on the bottom surface of the center drill bit body, the planar cutting tooth and the conical cutting tooth are arranged at intervals, and a nozzle located between the adjacent planar cutting tooth and the adjacent conical cutting tooth is arranged on the center drill bit body.
According to the size-adjustable drill bit, the stepped through holes in the blades are aligned with different threaded holes in the protruding portions so as to change the cutting diameters of the cutting teeth on the blades, and drilling tasks of multiple sizes can be met; the cutter wings provided with the cutting teeth are fixed on the convex parts of the drill bit body through screws, so that the cutter wings can be conveniently detached from the drill bit, the cutting teeth on the cutter wings are seriously abraded, the diameter of a drilled hole is reduced, the standard cannot be reached, the whole drill bit does not need to be replaced, and only the cutter wings with the cutting teeth need to be replaced; the rotary drum is rotated to enable the adjusting mechanism to drive the gauge protection part to move so that the gauge protection size of the gauge protection part is matched with the cutting diameter of the cutting teeth on the blade, and the locking block provided with the upper threaded hole and the lower threaded hole is simultaneously in threaded connection with the rotary drum and the fixed cylinder to fix the rotary drum, so that the gauge protection size of the gauge protection part is prevented from being changed; the drill bit body is rotatably provided with a central drill bit and is used for cutting rocks at the center of a borehole so as to improve the drilling efficiency at the center of the borehole, thereby improving the drilling efficiency of the whole drill bit.
The invention has the beneficial effects that:
(1) when the blade slides along the bulge of the drill bit body, the stepped through hole on the blade is aligned with the different threaded holes on the bulge, the cutting diameter of the cutting teeth on the blade is changed, and the drilling tasks of multiple sizes can be met.
(2) The blade provided with the cutting teeth is fixed on the convex part of the drill bit body through a screw, so that the blade is convenient to detach from the drill bit; the cutting teeth on the blades are seriously worn, so that the diameter of a drilled hole is reduced, the drilled hole cannot reach the standard, the whole drill bit does not need to be replaced, only the blades with the cutting teeth need to be replaced, and the cost is saved.
(3) The rotary drum is rotated to drive the rotary disc fixedly connected with the rotary drum to rotate, the rotary disc drives the rectangular block at the lower end of the movable rod to slide in the sliding groove of the rotary disc, the rectangular block at the lower end of the movable rod drives the T-shaped rod slidably mounted on the lower fixed disc through the cylindrical section rotatably connected with the rectangular block, the T-shaped rod slidably mounted on the upper fixed disc slides simultaneously, and then the sliding block is driven to slide in the rectangular hole in the shell to push the gauge protection part to move together, so that the gauge protection size of the gauge protection part is adapted to the cutting diameter of the cutting teeth on the blades, the gauge protection part is matched with the blades provided with the cutting teeth for use, the drill bit can achieve the gauge protection effect while drilling and can also prolong the service life.
(4) After the gauge size of the gauge is adjusted to be matched with the cutting diameter of the cutting teeth on the blade, the rotary drum needs to be fixed to prevent the gauge size of the gauge from changing; the support is fixed on the inner wall of the shell and fixedly connected with the fixed cylinder, and the locking block provided with the upper threaded hole and the lower threaded hole is simultaneously in threaded connection with the rotary cylinder and the fixed cylinder to fix the rotary cylinder.
(5) The center drill bit is rotatably connected with the hole in the drill bit body through the third bearing, so that friction between the center drill bit and rocks can be reduced, and the center drill bit is used for cutting the rocks at the center of the borehole so as to improve the drilling efficiency at the center of the borehole, thereby improving the drilling efficiency of the whole drill bit.
Drawings
FIG. 1: a first structural schematic diagram of a size-adjustable drill bit of the present invention;
FIG. 2: the invention discloses a schematic sectional structure diagram of a size-adjustable drill bit;
FIG. 3: the invention relates to a partial structure section of a size-adjustable drill bit;
FIG. 4: the invention discloses a partial structure schematic diagram of a size-adjustable drill bit;
FIG. 5: the invention discloses a structure schematic diagram of a rotary table of a size-adjustable drill bit;
FIG. 6: the invention discloses a structural schematic diagram of an upper fixed disc of a size-adjustable drill bit;
FIG. 7: the invention relates to an internal structure section of a size-adjustable drill bit;
FIG. 8: a second structural schematic diagram of a size-adjustable drill bit according to the present invention;
FIG. 9: the invention discloses a central drill bit structure schematic diagram of a size-adjustable drill bit.
Description of the symbols:
1. the rotary cutting tool comprises a threaded connection portion, 2, a shell, 3, a gauge portion, 4, a tool bit body, 5, blades, 6, a center tool bit, 7, a rotary drum, 8, a rotary disc, 9, a movable rod, 10, a T-shaped rod, 11, a sliding block, 12, a second bearing, 13, a support, 14, a first bearing, 15, a fixed cylinder, 16, a locking block, 17, an upper fixed disc, 18, a lower fixed disc, 61, a rotary connection portion, 62, a center tool bit main body, 63, a plane cutting tooth, 64, a conical cutting tooth, 65 and a nozzle.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings and examples, in which it is to be understood that the embodiments described are merely illustrative of some, but not all embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to the size-adjustable drill bit disclosed by the embodiment of the invention, the stepped through holes on the blades 5 are aligned with different threaded holes on the convex parts so as to change the cutting diameters of the cutting teeth on the blades 5, so that the drilling tasks of multiple sizes can be met; the blade 5 provided with the cutting teeth is fixed on the convex part of the drill bit body 4 through a screw, so that the blade 5 is convenient to detach from the drill bit, the cutting teeth on the blade are seriously worn, the diameter of a drilled hole is reduced, the standard cannot be reached, the whole drill bit does not need to be replaced, and only the blade with the cutting teeth needs to be replaced; the diameter-protecting part 3 is driven by the adjusting mechanism to move by rotating the rotary drum 7 so that the diameter-protecting size of the diameter-protecting part 3 is matched with the cutting diameter of the cutting teeth on the blade 5, and the rotary drum 7 is fixed by the locking block 16 provided with an upper threaded hole and a lower threaded hole which are simultaneously in threaded connection with the rotary drum 7 and the fixed drum 15, so that the diameter-protecting size of the diameter-protecting part 3 is prevented from changing; a center bit 6 is rotatably mounted on the bit body 4 for cutting rock at the center of the borehole to improve drilling efficiency at the center of the borehole and thus the drilling efficiency of the entire bit.
As shown in fig. 1 and 2, the size-adjustable drill bit of the present invention comprises a threaded connection portion 1, a casing 2 fixedly connected below the threaded connection portion 1 and having three through holes uniformly distributed in the circumferential direction, and a drill bit body 4 fixedly installed below the casing 2, wherein the upper end of the threaded connection portion 1 is in threaded connection with a drill rod, the threaded connection portion 1 and the casing 2 are detachably connected through threaded connection, etc., the casing 2 is provided with three radial movable gauge protection portions 3 through an adjusting mechanism, the drill bit body 4 is fixedly provided with detachable blades 5 having adjustable cutting diameters, the blades 5 are provided with cutting teeth, and when the cutting teeth on the blades 5 are gradually worn in a drilling process to reduce the diameter of a drill hole, the gauge protection portions 3 start gauge protection work, so as to reduce the loss of the drill bit.
As shown in fig. 1 and 2, the bit body 4 includes a central portion whose outer surface is a spherical surface, a convex portion whose circumference is fixed on the outer wall of the central portion and provided with equally spaced threaded holes, the threaded holes on the convex portion extend from the convex portion to the central portion and the extension lines of the threaded holes all pass through the spherical center of the bit body 4, the outer surface of the convex portion is a spherical surface concentric with the central portion, the inner surface of the wing 5 is matched with the central portion, i.e. the inner surface of the wing 5 is a spherical surface matched with the outer wall of the central portion and the inner surface of the wing 5 is always matched with the central portion, the inner side of the wing 5 is provided with a groove matched with the convex portion, the outer side of the wing 5 is provided with cutting teeth and a stepped through hole, the extension line of the stepped through hole on the wing 5 passes through the spherical center of the bit body 4, when the stepped through hole on the wing 5 is aligned with, two stepped through holes are formed in the blade 5, four threaded holes are formed in the protruding portion at equal intervals, and the stepped through holes in the blade 5 are aligned with different threaded holes in the protruding portion when the blade 5 slides along the protruding portion, so that the cutting diameter of the cutting teeth on the blade 5 is changed accordingly.
As shown in fig. 1, 2 and 8, the gauge protection part 3 includes a plate-shaped gauge protection part main body protruding outwards and two rollers symmetrically arranged on two sides of the gauge protection part main body and rotatably connected with the gauge protection part main body, the diameter of the rollers is equal to the thickness of the gauge protection part main body, the rollers positioned on two sides of the gauge protection part main body can prevent two sides of the gauge protection part main body from rubbing against rocks, so as to prolong the service life of the gauge protection part main body, the rollers are made of high-wear-resistant materials, the rollers and the rocks generate rolling friction to reduce the friction between the rollers and a well wall, so as to prolong the service life of the rollers, gauge protection teeth are arranged on the outer side surface of the gauge protection part main body, and when cutting teeth on the blades 5 gradually wear in the drilling process to reduce the diameter of a drill hole, the gauge protection teeth on the outer side of.
As shown in fig. 2, 3 and 4, the adjusting mechanism includes a rotating drum 7 with an external thread arranged on the upper part, the lower end of the rotating drum 7 is fixedly connected with a rotating disc 8 with three chutes uniformly distributed thereon, the rotating drum 7 and the rotating disc 8 are in threaded connection or interference fit, the chutes on the rotating disc 8 extend from outside to inside in an inclined manner, connecting lines of two ends of the chutes do not intersect with the central line of the rotating disc 8, the lower end of the rotating disc 8 is rotatably connected with the bottom end of the casing 2 through a second bearing 12, the rotating disc 8 is in clearance fit with the inner wall of the casing 2 to facilitate the rotating disc 8 to rotate in the casing 2, movable rods 9 are respectively connected in the three chutes on the rotating disc 8, the upper ends of the movable rods 9 sequentially penetrate through a lower fixed disc 18, T-shaped rods 10 slidably mounted on the lower fixed disc 18, an upper fixed disc 17 and T-shaped rods 10 slidably, T type pole 10, the cylinder section of upper fixed disk 17 fixed connection, the rectangle piece rotates with the cylinder section to be connected, when the rectangle piece of movable rod 9 slides in the spout of carousel 8, the cylinder section of rotating with the rectangle piece and being connected drives T type pole 10 and promotes sliding block 11 and slide in the rectangular hole on casing 2, thereby it slides together in order to change the gauge size of gauge 3 to drive gauge 3, the cross-section of T type pole 10 is T type and upper end width is less than the lower extreme width, prevent that T type pole 10 from taking place axial displacement on upper fixed disk 17 and breaking away from upper fixed disk 17, T type pole 10 outer end and sliding block 11 fixed connection, with casing 2 last rectangular hole complex sliding block 11 outer end and gauge 3 fixed connection, the example, sliding block 11 passes through the screw connection with gauge 3.
As shown in fig. 2 to 7, the lower end surface of the upper fixed disk 17 is attached to the lower fixed disk 18 and both of them are in interference fit with the inner wall of the casing 2, the upper end of the rotary disk 8 passes through the lower fixed disk 18, the upper fixed disk 17 is fixedly connected with the rotary drum 7, the rotary drum 7 is rotatably connected with the support 13 through the first bearing 14, the support 13 is fixed on the inner wall of the casing 2, the support 13 is fixedly connected with a fixed cylinder 15 which is not sleeved on the rotary drum 7, for example, the fixed cylinder 15 is fixed with the support 13 in an inserting manner, and the rotary drum 7 and the fixed cylinder 15 are simultaneously fixedly connected with the.
As shown in fig. 1, 2 and 3, the rotating drum 7 is rotated to drive the rotating disc 8 fixedly connected with the rotating drum to rotate, the rotating disc 8 drives the rectangular block at the lower end of the movable rod 9 to slide in the sliding groove of the rotating disc 8, the rectangular block at the lower end of the movable rod 9 drives the T-shaped rod 10 slidably mounted on the lower fixed disc 18 and the T-shaped rod 10 slidably mounted on the upper fixed disc 17 to slide simultaneously through the cylindrical section rotatably connected with the rectangular block, and further drives the sliding block 11 to slide in the rectangular hole on the housing 2 to push the gauge portion 3 to move together, so that the gauge size of the gauge portion 3 is adapted to the cutting diameter of the cutting teeth on the blade 5.
As shown in fig. 1 and 2, the three through holes of the housing 2 are rectangular holes, and the sliding block 11 is engaged with the rectangular hole of the housing 2 and always slides in the rectangular hole of the housing 2, so that the supporting strength of the sliding block 11 on the gauge part 3 is increased.
As shown in fig. 2, 3 and 6, three T-shaped grooves matched with the T-shaped rods 10 are uniformly distributed on the circumference of the upper end surface of the upper fixed disk 17, through holes for accommodating cylindrical sections of the movable rods 9 are formed in the bottoms of the T-shaped grooves, when the cylindrical sections of the movable rods 9 are located at one ends of the through holes of the T-shaped grooves close to the center of the upper fixed disk 17, the gauge size of the gauge section 3 is minimum, when the cylindrical sections of the movable rods 9 are located at one ends of the through holes of the T-shaped grooves far away from the center of the upper fixed disk 17, the gauge size of the gauge section 3 is maximum, the upper fixed disk 17 and the lower fixed disk 18 have the same structure.
As shown in fig. 2 and 7, an upper threaded hole matched with the upper end of the rotary drum 7 and a lower threaded hole matched with the upper end of the fixed cylinder 15 are arranged in the locking block 16, the diameter of the upper threaded hole is smaller than that of the lower threaded hole, and the locking block 16 is simultaneously connected with the rotary drum 7 and the fixed cylinder 15 to prevent the rotary drum 7 and the fixed cylinder 15 from rotating relatively.
As shown in fig. 1, 2, and 7, after the gauge size of the gauge 3 is adjusted to match the cutting diameter of the cutting teeth on the blade 5, the drum 7 needs to be fixed to prevent the gauge size of the gauge 3 from changing. The support 13 is fixed on the inner wall of the shell 2, the support 13 is fixedly connected with the fixed cylinder 15, and the locking block 16 provided with an upper threaded hole and a lower threaded hole is simultaneously in threaded connection with the rotary drum 7 and the fixed cylinder 15 so as to prevent the rotary drum 7 from rotating.
As shown in fig. 2, 8 and 9, the size-adjustable drill further includes a central drill 6, the central drill 6 is rotatably connected to the hole of the drill body 4 through a third bearing 19, so as to reduce friction between the central drill 6 and rock, two third bearings 19 are provided, the central drill 6 is used for cutting rock at the center of the borehole to improve drilling efficiency at the center of the borehole, so as to improve drilling efficiency of the entire drill, the central drill 6 includes a rotary connecting portion 61 rotatably connected to the drill body 4, a lower end of the rotary connecting portion 61 is fixedly connected to the central drill body 62, specifically, a lower end of the rotary connecting portion 61 is welded to the central drill body 62, a wear-resistant layer is provided on an outer wall of the central drill body 62 to increase service life of the central drill body 62, a bottom surface of the central drill body 62 is radially provided with planar cutting teeth 63 and conical cutting teeth 64, the conical cutting teeth 64 can better concentrate load on one point for rock breaking, the cuttings blocks are larger, the plane cutting teeth 63 and the conical cutting teeth 64 are arranged at intervals, the rock breaking efficiency is improved, and the central drill bit body 62 is provided with a nozzle 65 positioned between the adjacent plane cutting teeth 63 and the adjacent conical cutting teeth 64.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention are to be considered within the scope of the invention.
Claims (9)
1. A size adjustable drill bit is characterized in that: including threaded connection portion, fixed connection be in casing, the fixed mounting of threaded connection portion below and the three through-hole of circumference equipartition are in the drill bit body of casing below, the casing passes through the three radial movement's of adjustment mechanism installation footpath section of protecting, fixed mounting cutting diameter is adjustable and detachable wing on the drill bit body, adjustment mechanism includes that the top sets up the rotary drum of external screw thread, the carousel fixed connection of the three spout of rotary drum lower extreme and equipartition, spout outside-in slope on the rotary drum extends and the line at spout both ends does not intersect with the central line of rotary disc, the rotary disc lower extreme pass through the second bearing with the bottom of casing is rotated and is connected, all connect the movable rod in the three spout on the rotary disc, the movable rod upper end passes down fixed disk, slidable mounting in proper order under T type pole, upper fixed disk, slidable mounting is in T type pole on the last fixed disk, T type pole outer end and sliding block fixed connection, with rectangular hole complex on the casing the sliding block outer end with protect footpath portion fixed connection, under the last fixed disk terminal surface with down the fixed disk laminating and both all with shells inner wall interference fit, under the fixed disk terminal surface with carousel clearance fit, the rotary drum passes through first bearing and rotate bracket connection, the support is fixed on the shells inner wall, the support is in with the blank cover a fixed cylinder fixed connection on the rotary drum, the guarantor size of guarantor portion adjust to with the wing on the cutting diameter of cutting tooth suit after, will the rotary drum with a fixed cylinder is simultaneously with latch segment fixed connection in order to prevent the rotary drum rotation.
2. A dimensionally adjustable drill bit according to claim 1, further comprising: the drill bit body includes that the surface is fixed for central part, the circumference of sphere central part outer wall and is provided with the bellying of equidistant screw hole, screw hole on the bellying by the bellying extends to the extension line of central part and screw hole all passes through the centre of sphere of drill bit body, the surface of bellying be with the sphere of central part concentric centre of sphere, the internal surface of wing with the central part cooperation, the wing inboard set up with bellying complex recess, the outside sets up cutting teeth and ladder through-hole, the extension line process of ladder through-hole on the wing the centre of sphere of drill bit body just the wing passes through the fix with screw on the bellying.
3. A dimensionally adjustable drill bit according to claim 1, further comprising: the gauge protection part comprises a plate-shaped gauge protection part main body protruding outwards and two rollers symmetrically arranged on two sides of the gauge protection part main body and rotationally connected with the gauge protection part main body, the diameter of each roller is equal to the thickness of the gauge protection part main body, and gauge protection teeth are arranged on the outer side face of the gauge protection part main body.
4. A dimensionally adjustable drill bit according to claim 3, further comprising: the three through holes on the shell are rectangular holes.
5. A dimensionally adjustable drill bit according to claim 1, further comprising: the movable rod comprises a rectangular block sliding in the sliding groove on the turntable and a cylindrical section fixedly connected with the lower fixed disk, the T-shaped rod and the upper fixed disk, the rectangular block is rotatably connected with the cylindrical section, and the cross section of the T-shaped rod is T-shaped, and the width of the upper end of the T-shaped rod is smaller than that of the lower end of the T-shaped rod.
6. A dimensionally adjustable drill bit according to claim 1, further comprising: the sliding block with rectangular hole cooperation on the casing just is in all the time rectangular hole on the casing slides.
7. A dimensionally adjustable drill bit according to claim 1, further comprising: the circumference of the upper end face of the upper fixed disk is uniformly distributed three T-shaped grooves matched with the T-shaped rods, through holes for containing the cylindrical sections of the movable rods are formed in the bottoms of the T-shaped grooves, and the upper fixed disk is the same in structure as the lower fixed disk and is higher than the lower fixed disk.
8. A dimensionally adjustable drill bit according to claim 1, further comprising: an upper threaded hole matched with the upper end of the rotary drum and a lower threaded hole matched with the upper end of the fixed drum are formed in the locking block, and the diameter of the upper threaded hole is smaller than that of the lower threaded hole.
9. A dimensionally adjustable drill bit according to claim 1, further comprising: the size-adjustable drill bit further comprises a center drill bit, the center drill bit is rotatably connected with a hole in the drill bit body through a third bearing, the center drill bit comprises a rotating connecting portion which is rotatably connected with the drill bit body, the lower end of the rotating connecting portion is fixedly connected with the center drill bit body, a wear-resistant layer is arranged on the outer wall of the center drill bit body, a plane cutting tooth and a conical cutting tooth are radially arranged on the bottom surface of the center drill bit body, the plane cutting tooth and the conical cutting tooth are arranged at intervals, and a nozzle which is located between the adjacent plane cutting tooth and the conical cutting tooth is arranged on the center drill bit body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911015586.8A CN110593768B (en) | 2019-10-24 | 2019-10-24 | Size-adjustable drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911015586.8A CN110593768B (en) | 2019-10-24 | 2019-10-24 | Size-adjustable drill bit |
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| CN112177532A (en) * | 2020-09-11 | 2021-01-05 | 祁东县锋速钻探工具有限公司 | High-efficiency geological drill bit capable of expanding stratum application range |
| CN112145085B (en) * | 2020-11-23 | 2021-08-03 | 西南石油大学 | Controllable reducing drill bit |
| CN112610159B (en) * | 2020-12-07 | 2022-05-13 | 中国石油大学(华东) | Stepped drill bit suitable for intelligent drilling of difficult-to-drill stratum and drilling method |
| CN112696156B (en) * | 2020-12-28 | 2023-05-30 | 安徽澳德矿山机械设备科技股份有限公司 | Drill bit with adjustable body size |
| CN112873402B (en) * | 2021-01-11 | 2023-01-13 | 南京市蓝业科技有限公司 | Equipment for processing non-woven fabric punched holes |
| CN114704208B (en) * | 2022-06-06 | 2022-08-09 | 胜利油田万和石油工程技术有限责任公司 | Drill bit assembly with adjustable tooth crest angle |
| CN115139378B (en) * | 2022-08-02 | 2023-01-20 | 江苏旅游职业学院 | Drilling and polishing equipment for bamboo flute processing |
| CN116591612B (en) * | 2023-07-17 | 2023-11-10 | 山东省地质矿产勘查开发局第一地质大队（山东省第一地质矿产勘查院） | PDC drill bit capable of preventing drill sticking |
| CN117532692B (en) * | 2023-11-13 | 2024-06-21 | 徐州中集新材科技发展有限公司 | Drilling equipment is used in panel processing |
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| CN201671547U (en) * | 2010-05-06 | 2010-12-15 | 中国石油天然气股份有限公司 | PDC drill bit with gauge having cylindrical roller |
| CN203835276U (en) * | 2014-05-04 | 2014-09-17 | 胜利油田盛辉石油技术开发有限责任公司 | PDC drill bit |
| CN204532081U (en) * | 2015-04-22 | 2015-08-05 | 马永江 | A kind of gauge structure of directional well drill bit |
| JP6447741B2 (en) * | 2016-08-09 | 2019-01-09 | 三菱マテリアル株式会社 | Drilling tools |
| CN107939298A (en) * | 2018-01-09 | 2018-04-20 | 西南石油大学 | Can detachable type PDC drill bit |
| CN109138847A (en) * | 2018-10-19 | 2019-01-04 | 李如意 | A kind of new drill |
| CN109723385B (en) * | 2019-01-17 | 2021-03-19 | 西南石油大学 | PDC drill bit with diameter-keeping and reducing functions |
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