CN219864872U - PDC reaming bit with spiral blade - Google Patents
PDC reaming bit with spiral blade Download PDFInfo
- Publication number
- CN219864872U CN219864872U CN202320092503.0U CN202320092503U CN219864872U CN 219864872 U CN219864872 U CN 219864872U CN 202320092503 U CN202320092503 U CN 202320092503U CN 219864872 U CN219864872 U CN 219864872U
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- pdc
- reaming
- transition
- guide
- bit
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 230000007704 transition Effects 0.000 claims abstract description 37
- 230000036346 tooth eruption Effects 0.000 claims abstract description 34
- 239000002893 slag Substances 0.000 claims abstract description 13
- 239000002131 composite material Substances 0.000 claims description 11
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 32
- 239000011435 rock Substances 0.000 abstract description 26
- 238000005065 mining Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- 239000013049 sediment Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000012634 fragment Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 235000011470 Adenanthera pavonina Nutrition 0.000 description 1
- 241000428378 Lopa Species 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The utility model discloses a PDC reaming bit with spiral blades, and belongs to the technical field of mining drilling equipment. The PDC reamer bit with helical blades includes: the drill bit body comprises a guide body, a transition body, a reaming body and a connecting screw thread, wherein the guide body is connected with the transition body; the spiral blades are uniformly distributed on the outer walls of the guide body, the transition body and the reaming body of the drill bit body, a plurality of main cutting teeth are arranged on the edges of one side of each spiral blade, which is positioned on the outer wall of the guide body section and the reaming body section, and a plurality of auxiliary cutting teeth are arranged on the edges of one side of each spiral blade, which is positioned on the outer wall of the transition body section; a slag discharge groove. The PDC reamer bit with the spiral blades can play a good role in righting when cutting rock, improve the guiding accuracy and reduce the drilling resistance and the water head pressure.
Description
Technical Field
The utility model relates to the technical field of mining drilling equipment, in particular to a PDC reaming bit with spiral blades.
Background
Along with the rapid development of directional exploration technology of coal mines, the depth of exploitation is continuously increased, the drilled rock stratum is more complex, the conventional hole forming process of directional pilot hole and graded reaming adopts directional perforation, and the diameter of the drilled hole is increased on the basis of the directional hole through the reaming technology. Conventional PDC reamer bits have significant advantages in hard rock drilling, but in soft or medium hard rock formations, the water hole flushing and water hole jet flow are used for upward slag returning, large water pressure is needed, the residual chip removal can lead to repeated crushing of PDC composite sheets, the drilling efficiency is low, and meanwhile, bit balling can be formed. The conventional PDC reamer bit has larger feeding pressure and longer drilling length, and adopts a linear groove or reduces the diameter of a guide part to leave an annular gap as a mud upward return passage for the reaming part and the guide part of the conventional PDC reamer bit.
There are several problems with conventional PDC reamer bits: when the pilot hole collapses more rock fragments, the conventional PDC reaming bit cannot be effectively guided into the hole due to high drilling resistance; the mud upward return needs to overcome the pressure of a larger water head, and the centralizing performance and the guiding performance are deteriorated by adopting small-diameter guiding; conventional PDC reamer bits can cause repeated fractures that affect bit life and drilling efficiency.
Disclosure of Invention
The utility model aims to solve the problems in the prior art and provides a PDC reaming bit with spiral blades, which can play a role in good righting when cutting rock, improve the guiding accuracy and reduce drilling resistance and water head pressure. Adopt the main cutting tooth of multirow to cut rock, can promote the drilling efficiency of drill bit.
The utility model provides a PDC reamer bit with spiral blades, comprising:
the drill bit body comprises a guide body, a transition body, a reaming body and a connecting screw thread, wherein the guide body is connected with the transition body;
the plurality of spiral blades are uniformly distributed on the outer walls of the guide body, the transition body and the reaming body of the drill bit body, a plurality of main cutting teeth are arranged on the edge of one side of each spiral blade, which is positioned on the outer wall of the guide body section and the reaming body section, and a plurality of auxiliary cutting teeth are arranged on the edge of one side of each spiral blade, which is positioned on the outer wall of the transition body section;
the slag discharging groove is arranged between two adjacent spiral blades.
Preferably, a central water hole is formed in the guide body, the transition body, the reaming body and the connecting screw thread, a plurality of water holes are formed in the outer wall of the transition body, each water hole is communicated with the central water hole, and an included angle between the axis of each water hole and the axis of the central water hole is an acute angle.
Preferably, one end of the guide body, which is far away from the connecting screw thread, is provided with a truncated cone-shaped guide head, and the large end face of the truncated cone-shaped guide head is connected with the guide body.
Preferably, the small end face of the truncated cone-shaped guide head is provided with a plurality of hard alloy cutting strips, and the hard alloy cutting strips are uniformly distributed along the circumference of the small end face of the truncated cone-shaped guide head.
Preferably, the outer walls of the spiral blades protrude out of the connecting screw threads, and one ends of the spiral blades, which are close to the connecting screw threads, are provided with transition inclined planes.
Preferably, the transition inclined plane of each spiral blade is provided with a reverse cutting tooth at the edge on the same side with the main cutting tooth.
Preferably, a plurality of auxiliary cutting teeth on the spiral blade are densely distributed in a staggered manner, the main cutting teeth adopt phi 16/13PDC composite sheets, and the auxiliary cutting teeth and the reverse cutting teeth both adopt phi 16/05PDC composite sheets.
Compared with the prior art, the utility model has the beneficial effects that: the PDC reamer bit with the spiral blades can play a good role in righting when cutting rock, improve the guiding accuracy and reduce the drilling resistance and the water head pressure. Adopt the main cutting tooth of multirow to cut rock, can promote the drilling efficiency of drill bit.
Through setting up central water hole and water hole, utilize the impact effect of high pressure rivers to make the smooth upward return of rock sediment mud, guarantee the sediment effect to avoid rock sediment by secondary crushing, thereby further improved drilling efficiency. Through setting up round platform shape first of leading, utilize the back taper outer wall of round platform shape first of leading to lead, can further guarantee the straightness accuracy of final drilling. Through setting up a plurality of carbide cutting strips, utilize a plurality of carbide cutting strips to cut the stratum in the direction of feed, can further promote the drilling efficiency of drill bit to promote the efficiency of drilling. Through setting up the transition inclined plane on a plurality of spiral wings, when moving back the boring, under the guiding effect of utilizing the transition inclined plane, can prevent that remaining rock sediment from moving back the boring and hinder. Through setting up the anti-cutting tooth, when moving back the boring, utilize the anti-cutting tooth to carry out further cutting to the drilling inner wall, can effectively avoid shrinkage cavity and collapse the difficult problem of card boring that leads to moves back. The PDC composite sheet is adopted for the main cutting teeth, the auxiliary cutting teeth and the reverse cutting teeth, so that the novel high-hardness high-wear-resistance high-heat-conductivity high-impact-toughness high-hardness high-toughness high-strength drilling bit has the advantage that the service life of the whole drill bit is prolonged.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic top view of the present utility model.
Reference numerals illustrate:
101. guide body 102, transitional body 103, reamer 104, connecting screw thread 105, spiral blade 106, main cutting tooth 107, auxiliary cutting tooth 108, slag discharging groove 201, central water hole 202, water hole 3, truncated cone-shaped leading head 4, transitional inclined plane 5, reverse cutting tooth 6, hard alloy cutting strip.
Detailed Description
Specific embodiments of the present utility model will be described in detail below with reference to fig. 1 and 2, but it should be understood that the scope of the present utility model is not limited by the specific embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1:
as shown in fig. 1 and 2, the PDC reamer bit with spiral blades provided by the present utility model comprises: the drill bit comprises a drill bit body, a plurality of spiral blades 105 and a slag discharging groove 108, wherein the drill bit body comprises a guide body 101, a transition body 102, a reaming body 103 and a connecting screw thread 104, the guide body 101 is connected with the transition body 102, the transition body 102 is connected with one end of the reaming body 103, the other end of the reaming body 103 is connected with the connecting screw thread 104, and the diameter of the reaming body 103 is larger than that of the guide body 101; the plurality of spiral blades 105 are uniformly distributed on the outer walls of the guide body 101, the transition body 102 and the reaming body 103 of the drill bit body, a plurality of main cutting teeth 106 are arranged on one side edge of each spiral blade 105, which is positioned on the outer walls of the guide body 101 section and the reaming body 103 section, and a plurality of auxiliary cutting teeth 107 are arranged on one side edge of each spiral blade 105, which is positioned on the outer walls of the transition body 102 section; the slag discharge groove 108 is provided between the adjacent two spiral blades 105.
The working principle of example 1 will now be briefly described:
the guide body 101, the transition body 102 and the reaming body 103 are made of mining Lopa molybdenum steel material, and the spiral blades 105 are four. The drill bit is connected to a drill rod through a connecting screw thread 104, and the drill rod is connected with a power device. When the drill rod is used, the drill rod is driven to rotate by the power device, the drill rod drives the whole drill bit to rotate, and the rotating spiral blades 105, the main cutting teeth 106 and the auxiliary cutting teeth 107 on the spiral blades cut and drill rock strata, and rock slag is discharged from the slag discharge groove 108. During drilling, the blades and the auxiliary cutting teeth 107 on the outer side of the guide body 101 drill the rock stratum first, and as the diameter of the guide body 101 is smaller than that of the reaming body 103, the reactive force born by the blades and the auxiliary cutting teeth 107 on the guide body 101 is smaller, so that the straightness accuracy of the pilot hole is easily ensured. When the blades and the main cutting teeth 106 on the transition body 102 are in contact with the rock stratum, the blades and the main cutting teeth 106 on the transition body 102 receive the reaction force of the rock stratum, the whole drill bit can play a role in centralizing and stabilizing under the guiding action of the pilot drill, and the drill bit is prevented from being inclined in drilling during reaming, so that the reaming body 103 and the blades and the auxiliary cutting teeth 107 on the reaming body can smoothly enter the pilot drill hole, and the pilot hole is expanded, so that the finally formed drill hole reaches the target aperture. The pilot bit 10 and the pilot head 11 have the same diameter, and meanwhile, the rock fragments collapsed in the pilot hole can be smoothly discharged, so that repeated breakage of the rock fragments is prevented, and the drilling efficiency is improved. By using the spiral blade 105, the drilling resistance can be reduced and the drilling rate can be increased.
According to the PDC reaming bit with the spiral blades, the guide body and the reaming body are arranged, and the spiral blades are arranged on the guide body and the reaming body, so that a good righting effect can be achieved when rock is cut, the guide accuracy is improved, and drilling resistance and water head pressure can be reduced. Adopt the main cutting tooth of multirow to cut rock, can promote the drilling efficiency of drill bit.
Example 2:
on the basis of the embodiment 1, in order to smoothly return the rock slag slurry, the deslagging effect is ensured, and the PDC composite sheet is prevented from being cut and secondarily broken, so that the drilling efficiency is further improved.
As shown in fig. 1 and 2, a central water hole 201 is formed in the guide body 101, the transition body 102, the reaming body 103 and the connecting screw thread 104, a plurality of water holes 202 are formed in the outer wall of the transition body 102, each water hole 202 is communicated with the central water hole 201, and an included angle between the axis of each water hole 202 and the axis of the central water hole 201 is an acute angle.
The drill bit is provided with four water holes 202 with the diameter phi of 18mm, the diameter phi of the central water hole 201 is 22mm, and the included angle between the axis of the water holes 202 and the axis of the central water hole 201 is 65 degrees. When the drill bit drills into the rock stratum, the slurry pump is utilized to provide high-pressure water in the central water hole 201, the high-pressure water is led to the tip end of the guide body 101 through the central water hole 201 and is sprayed to the inner wall of the drill hole along the four water holes 202, and the included angle between the axis of each water hole 202 and the axis of the central water hole 201 is 65 degrees, so that the blades, the main cutting teeth 106 and the auxiliary cutting teeth 107 can be cooled, and the rock slag slurry can be smoothly returned by utilizing the impact action of the high-pressure water flow, the slag discharging effect is ensured, the rock slag is prevented from being secondarily broken, and the drilling efficiency is further improved.
As a preferred solution, as shown in fig. 1, one end of the guide body 101, which is far away from the connecting screw thread 104, is provided with a truncated cone-shaped guide head 3, and a large end surface of the truncated cone-shaped guide head 3 is connected with the guide body 101. Through setting up round platform shape guide head 3, the resistance when the guide body 101 section drilling of drill bit can further be reduced to utilize the back taper outer wall of round platform shape guide head 3 to lead, can further guarantee the straightness accuracy of final drilling.
As a preferable solution, as shown in fig. 1, the small end surface of the truncated cone-shaped pilot head 3 is provided with a plurality of cemented carbide cutting strips 6, and the cemented carbide cutting strips 6 are uniformly distributed along the circumferential direction of the small end surface of the truncated cone-shaped pilot head 3. Through setting up a plurality of carbide cutting strips 6, the material of a plurality of carbide cutting strips 6 is tungsten carbide, utilizes a plurality of carbide cutting strips 6 to cut the stratum in the direction of feed, can further promote the drilling efficiency of drill bit to promote the efficiency of drilling.
As a preferable solution, as shown in fig. 1, the outer walls of the plurality of spiral blades 105 protrude from the connecting screw thread 104, and one end of the plurality of spiral blades 105, which is close to the connecting screw thread 104, is provided with a transition inclined plane 4. By providing the transition inclined surfaces 4 on the plurality of spiral blades 105, the residual rock in the drilled hole can be prevented from obstructing the drill withdrawal by the guiding action of the transition inclined surfaces 4 when the drill withdrawal is performed.
As a preferred solution, as shown in fig. 1, the transition slope 4 of each spiral blade 105 is provided with a counter cutting tooth 5 on the edge on the same side as the main cutting tooth 106. Through setting up anti-cutting tooth 5, when moving back the boring, utilize anti-cutting tooth 5 to carry out further cutting to the drilling inner wall, can effectively avoid shrinkage cavity and collapse to lead to the card boring to move back the difficult problem of boring.
As a preferable scheme, as shown in figure 1, a plurality of auxiliary cutting teeth 107 on the spiral blade 105 are densely distributed in a staggered way, the main cutting teeth 106 adopt phi 16/13PDC composite sheets, and the auxiliary cutting teeth 107 and the counter cutting teeth 5 adopt phi 16/05PDC composite sheets. The plurality of auxiliary cutting teeth 107 are densely distributed on the spiral blade 105 in a staggered manner, so that the uniformity of stress on the plurality of auxiliary cutting teeth 107 on the spiral blade 105 can be improved, and the equal life of the plurality of auxiliary cutting teeth 107 is improved. The main cutting teeth 106, the auxiliary cutting teeth 107 and the counter cutting teeth 5 are all PDC composite sheets, so that the high-hardness high-wear-resistance high-heat-conductivity high-impact-toughness PDC composite sheet has high hardness and high wear resistance, and has impact toughness, and the service life of the whole drill bit is prolonged.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A PDC reamer bit with helical blades, comprising:
the drill bit body comprises a guide body (101), a transition body (102), a reaming body (103) and a connecting screw thread (104), wherein the guide body (101) is connected with the transition body (102), the transition body (102) is connected with one end of the reaming body (103), the other end of the reaming body (103) is connected with the connecting screw thread (104), the diameter of the reaming body (103) is larger than that of the guide body (101), a central water hole (201) is formed in the guide body (101), the transition body (102), the reaming body (103) and the connecting screw thread (104), and a plurality of water holes (202) are formed in the outer wall of the transition body (102);
the spiral blades (105) are uniformly distributed on the outer walls of the guide body (101), the transition body (102) and the reaming body (103) of the drill bit body, a plurality of main cutting teeth (106) are arranged on one side edge of each spiral blade (105) which is positioned on the guide body (101) section and the outer wall of the reaming body (103) section, and a plurality of auxiliary cutting teeth (107) are arranged on one side edge of each spiral blade (105) which is positioned on the outer wall of the transition body (102) section;
and a slag discharge groove (108) arranged between two adjacent spiral blades (105).
2. The PDC reamer bit with helical blades of claim 1 wherein each of the water bores (202) is in communication with the central water bore (201), the axis of each water bore (202) being at an acute angle to the axis of the central water bore (201).
3. A PDC reamer bit with spiral blades according to claim 1, characterized in that the end of the guide body (101) far away from the connecting screw thread (104) is provided with a truncated cone-shaped guide head (3), and the large end face of the truncated cone-shaped guide head (3) is connected with the guide body (101).
4. A PDC reamer bit with spiral blades according to claim 3, characterized in that the small end face of the truncated cone-shaped pilot head (3) is provided with a plurality of cemented carbide cutting strips (6), and the cemented carbide cutting strips (6) are uniformly distributed along the circumference of the small end face of the truncated cone-shaped pilot head (3).
5. The PDC reamer bit with the spiral blades according to claim 1, wherein the outer walls of the spiral blades (105) protrude out of the connecting screw threads (104), and a transition inclined plane (4) is arranged at one end of the spiral blades (105) close to the connecting screw threads (104).
6. A PDC reamer bit with helical blades according to claim 5, wherein the transition bevel (4) of each helical blade (105) has a counter-cutting tooth (5) on the same side edge as the main cutting tooth (106).
7. The PDC reamer bit with helical blades of claim 5 wherein the plurality of secondary cutters (107) on the helical blades (105) are offset densely packed, the primary cutters (106) are a phi 16/13PDC composite, and the secondary cutters (107) and the counter cutters (5) are both a phi 16/05PDC composite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320092503.0U CN219864872U (en) | 2023-01-31 | 2023-01-31 | PDC reaming bit with spiral blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320092503.0U CN219864872U (en) | 2023-01-31 | 2023-01-31 | PDC reaming bit with spiral blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219864872U true CN219864872U (en) | 2023-10-20 |
Family
ID=88345039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320092503.0U Active CN219864872U (en) | 2023-01-31 | 2023-01-31 | PDC reaming bit with spiral blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219864872U (en) |
-
2023
- 2023-01-31 CN CN202320092503.0U patent/CN219864872U/en active Active
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