CN212249860U - Anti-sticking bores PDC drill bit - Google Patents
Anti-sticking bores PDC drill bit Download PDFInfo
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- CN212249860U CN212249860U CN202020579368.9U CN202020579368U CN212249860U CN 212249860 U CN212249860 U CN 212249860U CN 202020579368 U CN202020579368 U CN 202020579368U CN 212249860 U CN212249860 U CN 212249860U
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Abstract
The invention discloses an anti-sticking PDC drill bit, which comprises a drill bit body, a water hole and a fixed cutting structure, wherein the fixed cutting structure consists of blades extending from a drill bit body and cutting teeth fixedly connected on the blades, a roller assembly surface is arranged on the drill bit body, at least one roller is sleeved on the drill bit body and can freely rotate relative to the drill bit body, and the outer surface of the roller is provided with a wear-resistant surface layer and/or wear-resistant teeth. When the drill bit is at the rotatory drilling in pit, the cylinder on the nipple joint can be rolled to the wall of a well surface, can not only play stable drill bit and maintain the wall of a well etc. effect, can fall the piece with the wall of a well moreover and roll the breakage, effectively reduce because of falling the risk that the piece stuck the brill, reduce moment of torsion and moment of torsion fluctuation, because the bearing capacity of cylinder and bearing is strong, be difficult for breaking the well that falls, operational reliability is high.
Description
Technical Field
The invention relates to the technical field of drilling tools for oil and gas drilling engineering, mining, geological drilling and the like, in particular to an anti-sticking PDC drill bit.
Background
The drill bit is the main tool for breaking rock during oil and gas drilling, the well hole is formed by breaking rock through the drill bit, and the quality of the working performance of the drill bit directly influences the drilling quality, the drilling efficiency and the drilling cost. At present, the problem of unstable well wall still puzzles the field work in the oil drilling process. The hard layer can often be encountered in the shaft bottom drilling process for the vibrations of downhole tools such as drill bit, drilling rod can not be avoided, and this will cause the wall of a well vibrations, and if the wall of a well is unstable this moment, in case receive vibrations, the detritus of a piece down drops thereupon, will block between the drill bit wing that contains fixed wing such as PDC drill bit, causes the drill bit card to bore.
Disclosure of Invention
The invention aims to provide an anti-sticking PDC drill bit, which solves the problem that the drill bit cannot be stuck because the drill bit cannot break a well wall and fall blocks.
The invention is realized by the following technical scheme: the utility model provides an anti-sticking bores PDC drill bit, includes drill bit body, water hole, fixed cutting structure comprises the wing of extending from the drill bit body to and the cutting teeth of concreteing on the wing, installs a cylinder on the drill bit at least, and the cylinder has base member, working face and hole the axial region between gage section or gage block to the thread end face on the drill bit is provided with the cylinder assembly face, the cylinder passes through the assembly face suit on the drill bit body, can be for the drill bit body free rotation.
The well wall dropping block is generally much larger than drilling cuttings, and can not overcome the buoyancy and impact of mud returning upwards and easily fall into the well bottom directly, the larger dropping block entering the well bottom can be clamped between the blades of the drill bit, so that the drill bit is difficult to continuously drill, the drill bit is clamped, and the cutting teeth can be damaged by larger impact force of the cutting teeth. The roller arranged on the diamond drill bit capable of preventing the drill sticking can prevent larger falling blocks from falling into the bottom of the well, thereby protecting the cutting teeth and reducing the risk of drill sticking. The teeth on the roller can further impact and roll the falling blocks in one step, and the larger falling blocks are crushed, so that the slurry is favorably carried out from the bottom of the well.
The working surface of the roller is provided with a wear-resistant surface layer and/or a plurality of teeth distributed on the working surface.
Preferably, a plurality of teeth which are embedded and fixed in an interference fit or welding mode are distributed on the working surface of the roller, or a plurality of teeth which are formed in a machining or sintering mode are distributed. The teeth improve the efficiency of impact rolling to break the pieces. The portion of the teeth exposed on the outer surface of the drum may be tapered or hemispherical. The teeth can also be rollers transversely arranged on the roller, and can roll along the drilling direction of the drill bit, so that the resistance between the roller and the well wall is reduced.
Preferably, the drill bit body is a split structure consisting of a crown body and a joint body, threads for connecting a drill string are arranged on the joint body, and the roller assembling surface is arranged on the crown body and/or the joint body. The width of the roller assembling surface is slightly larger than that of the roller. The roller is axially limited between the joint and the crown body, the inner circular surface of the roller and the roller assembly surface form a friction pair, so that the roller can freely rotate around the drill bit, and a sealing ring can be arranged between the roller and the roller assembly surface to reduce the abrasion of the inner ring of the roller.
Preferably, the roller is a ridge roller, and diversion grooves are formed between ridges. The surface of the ridge can be overlaid with a wear-resistant layer to increase the wear resistance of the ridge.
Preferably, a flow guide hole is formed in the drum base body.
Preferably, the drill blade has a gauge block, and the roller is mounted on an upper side of the gauge block. Be provided with the annular on the gauge block, the cylinder is installed on the annular, and the width of annular is greater than the width of cylinder, can set up spacing post on the annular with the cylinder spacing on the annular.
Preferably, the drill bit is provided with at least two rollers, the drill bit body is provided with a mounting surface for each roller, and the mounting surfaces of different rollers can be arranged independently or can share the same mounting surface.
Preferably, the drill bit is provided with at least 1 fixed cylinder besides the roller, the fixed cylinder is provided with a base body, a working face and an inner hole, the working face of the fixed cylinder is also provided with a wear-resistant surface layer or is provided with a plurality of teeth distributed on the working face, the drill bit is provided with a fixed cylinder assembly face, and the inner hole of the fixed cylinder is sleeved and fixed at the fixed cylinder assembly face of the drill bit.
Preferably, the roller is an eccentric roller structure, and/or a skewed roller, and/or a non-round profile roller. The eccentric structure roller can provide unbalanced force when teeth of the roller impact falling blocks or roll rocks on a well wall, so that the drill bit generates transverse vibration at the bottom of the well. Proper lateral vibration is beneficial for proper drilling. The roller is of an eccentric structure and can be realized by non-concentricity of the inner circle and the outer circle, and can also be realized by different heights of teeth or by arranging the teeth only on part of the circumference. Similarly, the oval roller can generate transverse vibration when impacting the well wall, which is beneficial to improving the whole drilling efficiency of the drill bit.
The invention has the beneficial effects that: the roller of the diamond drill bit capable of preventing the drill bit from being stuck can prevent a large dropping block from entering the shaft bottom, and teeth on the roller can impact and roll the well wall to drop the block, so that the risk that the large dropping block enters the shaft bottom is reduced, and the risk of sticking the drill bit due to the dropping block is prevented or reduced.
Drawings
Fig. 1 is a front view of the first embodiment.
Fig. 2 is a sectional view of fig. 1.
FIG. 3 is a diagram of a crown of a bit body according to an embodiment.
FIG. 4 is a diagram of a joint body of a bit body according to an embodiment.
Fig. 5 is a perspective view of a drum having channels.
Fig. 6 is a top view of fig. 5.
Fig. 7 is a view of fig. 5 without the teeth.
Fig. 8 is a perspective view of the second embodiment.
Fig. 9 is a cross-sectional view of fig. 7.
Fig. 10 is a diagram of a structure of a second embodiment with a collar stopper.
Fig. 11 is a structural diagram of the second embodiment with ball limit.
Fig. 12 is a front view of the third embodiment.
Fig. 13 is a cross-sectional view of fig. 9.
FIG. 14 is a crown diagram of an embodiment triple bit body.
FIG. 15 is a diagram of a joint body of an embodiment tri-bit body.
Fig. 16 is a front view of the fourth embodiment.
Fig. 17 is a cross-sectional view of fig. 13.
Fig. 18 is a structural view of a fifth embodiment.
Fig. 19 is a structural view of a drum guide groove of the fifth embodiment in the form of a straight groove.
Fig. 20 is a structural view of a drum guide groove of the fifth embodiment in the form of a spiral groove.
Fig. 21 is a structural view of a sixth embodiment.
Fig. 22 is a block diagram of a seventh embodiment.
FIG. 23 is a schematic diagram of a seventh embodiment having a fixed platen.
Fig. 24 is a schematic view of a drum with deflector holes.
Fig. 25 is a schematic view of a drum having an elliptical structure.
FIG. 26 is a schematic view of a drum with eccentric configuration where the inner and outer races are not concentric.
FIG. 27 is a schematic view of rollers with teeth disposed in only a portion of the circumferential space.
Fig. 28 is a roller having teeth of hemispherical configuration.
Fig. 29 is a roller with a rollable wear resistant tooth post.
Fig. 30 is a drill bit with a rollable wear-resistant tooth post roller installed.
Fig. 31 is a view showing a structure of a ridge type drum.
Shown in the figure: 1-bit body, 2-roller, 3-joint body, 4-crown body, 5-cutting tooth, 6-sealing ring, 7-limiting column, 8-collar, 9-ball, 10-fixed tooth column, 101-roller assembly surface, 401-blade, 201-tooth, 202-runner groove, 203-diversion hole, 204-wear-resistant tooth column, 205-ridge and 102-gauge block
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The first embodiment is as follows: as shown in fig. 1-4, the anti-seize PDC drill bit comprises a bit body 1 and a roller 2, wherein the bit body 1 comprises a joint body 3 and a crown body 4, blades 401 are arranged on the crown body 4, and cutting teeth 5 are arranged on the blades 401. The joint body 3 and the crown body 4 of the bit body 1 are of split structures, threads for connecting a drill string are arranged on the joint body 3, and the roller assembling surface 101 is arranged on the joint body 3. Two sealing rings 6 are arranged between the roller 2 and the joint body 3. The width of the drum mounting surface 101 is slightly larger than the width of the drum 2. The outer side of the drum 5 as shown in fig. 5-7 is provided with channels 502 and teeth 501.
The second embodiment is as follows: as shown in fig. 8-9, the anti-seize PDC drill bit comprises a bit body 1 and a roller 2, wherein the bit body 1 comprises a joint body 3 and a crown body 4, blades 401 are arranged on the crown body 4, and cutting teeth 5 are arranged on the blades 401. The joint body 3 and the crown body 4 of the bit body 1 are of an integrated structure, the roller assembly surface 101 is arranged on the joint body 3, and the roller 5 is axially limited between the limiting column 7 and the crown body 3 through the limiting column 7 arranged on the joint body 2.
Preferably, a collar positioning as shown in fig. 10 may be used for the axial positioning of the drum 2. The cylinder 2 is constrained between the crown 3 and the collar 8.
Preferably, the roller 2 can be positioned in the axial direction by using a ball positioning method as shown in fig. 11. A circle of balls 9 are arranged between the roller 2 and the joint body 3, and the roller 2 is axially limited on the joint body 3 and can only rotate.
The third concrete implementation mode: as shown in fig. 12-15, the anti-seize PDC drill bit comprises a bit body 1 and a roller 2, wherein the bit body 1 comprises a joint body 3 and a crown body 4, blades 401 are arranged on the crown body 4, and cutting teeth 5 are arranged on the blades 401. The joint body 3 and the crown body 4 of the bit body 1 are of a split structure, the roller assembly surface 101 is arranged on the gauge block 102, the width of the roller assembly surface 101 is slightly larger than that of the roller 5, the joint body 3 and the crown body 4 are fixedly connected through threads, and the roller 2 is limited between the joint body 3 and the crown body 4.
The fourth concrete implementation mode: as shown in fig. 16-17, the anti-seize PDC drill bit comprises a bit body 1 and a roller 2, wherein the bit body 1 comprises a joint body 3 and a crown body 4, blades 401 are arranged on the crown body 3, and cutting teeth 5 are arranged on the blades 401. The joint body 3 and the crown body 4 of the bit body 1 are of an integrated structure, the roller assembly surface 101 is arranged on the gauge block 102, the width of the roller assembly surface 101 is slightly larger than that of the roller 5, and the roller assembly surface 101 is provided with a limiting column 7 to axially limit the roller 5 on the bit body 1.
The fifth concrete implementation mode: as shown in fig. 18, the anti-seize PDC drill bit comprises a bit body 1 and a roller 2, wherein the bit body 1 comprises a joint body 3 and a crown body 4, and the outer side surface of the roller 2 is not provided with a runner groove.
Preferably, as shown in fig. 19, the guide grooves 202 formed on the outer surface of the drum 2 are straight grooves.
Preferably, as shown in fig. 20, the guide grooves 202 are spiral grooves on the outer surface of the drum 2.
The sixth specific implementation mode: as shown in fig. 21, the anti-seize PDC drill bit comprises a bit body 1 and a roller 2, wherein the bit body 1 comprises a joint body 3 and a crown body 4, the roller 2 is a fixed cylinder and cannot rotate around the bit body 1, and is realized by a fixed tooth column 10 embedded between the roller 2 and the bit body 1, the fixed tooth column 10 can be exposed on the surface of the roller 2, the exposed part of the fixed tooth column has the same shape as teeth, and can participate in rolling of fallen blocks.
The seventh embodiment: as shown in fig. 22, the anti-seize PDC drill bit comprises a bit body 1 and a roller 2, wherein the bit body 1 comprises a joint body 3 and a crown body 4, and the roller 2 is formed by connecting 3 rollers in series. Preferably, as shown in fig. 23, 1 of them is a fixed roller.
As shown in fig. 24, the drum 2 is provided with a diversion hole 203.
As shown in fig. 25, the outer circumference of the drum 2 is elliptical.
As shown in fig. 26, the inner circle and the outer circle of the drum 2 are not concentric, and are eccentric structure, and the eccentricity is e.
As shown in fig. 27, the drum 2 is provided with teeth 201 only in a partial space in the circumferential direction. As shown in fig. 28, the teeth 201 on the drum 2 are exposed to the surface portion in a hemispherical shape. As shown in fig. 29, the drum 2 is provided with wear-resistant tooth columns 204 thereon, and is transversely arranged to roll in the advancing direction. The roller 2 on the anti-sticking drill bit shown in fig. 30 uses a wear resistant tooth post 204 that can roll.
As shown in fig. 31, the outer side surface of the drum structure has a ridge 202, the ridge 205 and the drum 2 are integrated, the ridge 205 is inclined on the drum 2, and a wear-resistant layer can be deposited on the ridge 205.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (10)
1. The utility model provides an anti-sticking bores PDC drill bit, includes drill bit body, water hole, fixed cutting structure comprises the wing of extension from the drill bit body to and the cutting teeth of concretion on the wing, its characterized in that: the drill bit is provided with at least one roller, the roller is provided with a matrix, a working surface and an inner hole, a roller assembly surface is arranged in an axial region between a gauge section or a gauge block on the drill bit body and the thread end surface, and the roller is sleeved on the drill bit body through the assembly surface and can freely rotate relative to the drill bit body.
2. The anti-sticking PDC drill bit of claim 1, wherein: the working surface of the roller is provided with a wear-resistant surface layer and/or a plurality of teeth distributed on the working surface.
3. The anti-sticking PDC drill bit of claim 1, wherein: a plurality of teeth which are fixedly embedded in an interference fit or welding mode are distributed on the working surface of the roller, or a plurality of teeth which are formed in a machining or sintering mode are distributed on the working surface of the roller.
4. The anti-sticking PDC drill bit of claim 1, wherein: the drill bit body is a split structure consisting of a crown body and a joint body, a thread for connecting a drill string is arranged on the joint body, and a roller assembling surface is arranged on the crown body and/or the joint body.
5. The anti-sticking PDC drill bit of claim 1, wherein: the roller is a ridge type roller, and diversion trenches are arranged between ridges.
6. The anti-sticking PDC drill bit of claim 1, wherein: a flow guide hole is arranged in the roller base body.
7. The anti-sticking PDC drill bit of claim 1, wherein: the bit blades have gauge blocks, and the rollers are mounted on the upper sides of the gauge blocks.
8. The anti-sticking PDC drill bit of claim 1, wherein: the drill bit is provided with at least two rollers, the drill bit body is provided with an assembling surface for each roller, and the assembling surfaces of different rollers can be independently arranged or share the same assembling surface.
9. The anti-sticking PDC drill bit of claim 1, wherein: the drill bit is provided with at least 1 fixed cylinder besides the roller, the fixed cylinder is provided with a base body, a working surface and an inner hole, the working surface of the fixed cylinder is also provided with a wear-resistant surface layer or a plurality of teeth distributed on the working surface of the fixed cylinder, the drill bit is provided with a fixed cylinder assembly surface, and the inner hole of the fixed cylinder is sleeved and fixed at the fixed cylinder assembly surface of the drill bit.
10. The anti-sticking PDC drill bit of claim 1, wherein: the roller is an eccentric roller structure, and/or a deflection roller, and/or a non-round profile roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020579368.9U CN212249860U (en) | 2020-04-18 | 2020-04-18 | Anti-sticking bores PDC drill bit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020579368.9U CN212249860U (en) | 2020-04-18 | 2020-04-18 | Anti-sticking bores PDC drill bit |
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| Publication Number | Publication Date |
|---|---|
| CN212249860U true CN212249860U (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020579368.9U Active CN212249860U (en) | 2020-04-18 | 2020-04-18 | Anti-sticking bores PDC drill bit |
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| CN (1) | CN212249860U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006703A (en) * | 2021-03-31 | 2021-06-22 | 四川宝石机械石油钻头有限责任公司 | Wear-resistant PDC-roller composite drill bit |
| CN113153168A (en) * | 2021-04-20 | 2021-07-23 | 中石化江钻石油机械有限公司 | Breaking device and drilling tool for falling blocks while drilling |
| CN113404435A (en) * | 2021-07-12 | 2021-09-17 | 潍坊盛德石油机械制造有限公司 | Eccentric drill bit and drilling equipment |
-
2020
- 2020-04-18 CN CN202020579368.9U patent/CN212249860U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006703A (en) * | 2021-03-31 | 2021-06-22 | 四川宝石机械石油钻头有限责任公司 | Wear-resistant PDC-roller composite drill bit |
| CN113006703B (en) * | 2021-03-31 | 2023-09-12 | 四川宝石机械石油钻头有限责任公司 | Wear-resistant PDC-roller cone composite drill bit |
| CN113153168A (en) * | 2021-04-20 | 2021-07-23 | 中石化江钻石油机械有限公司 | Breaking device and drilling tool for falling blocks while drilling |
| CN113404435A (en) * | 2021-07-12 | 2021-09-17 | 潍坊盛德石油机械制造有限公司 | Eccentric drill bit and drilling equipment |
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