CN202181847U - PDC drilling and expanding double-wing combined drill bit - Google Patents
PDC drilling and expanding double-wing combined drill bit Download PDFInfo
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- CN202181847U CN202181847U CN2011202375916U CN201120237591U CN202181847U CN 202181847 U CN202181847 U CN 202181847U CN 2011202375916 U CN2011202375916 U CN 2011202375916U CN 201120237591 U CN201120237591 U CN 201120237591U CN 202181847 U CN202181847 U CN 202181847U
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- drill
- drill bit
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Abstract
The utility model relates to a drill bit with a hole expansion function. The utility model aims to provide a combined drill bit which has the following advantages: simple operation and stable operation. The combined drill bit can be used for hole drilling and expanding of harder coal seam. According to the PDC drilling and expanding double-wing combined drill bit of the utility model, The front part of the drill bit body is fixedly provided with a plurality of cutting teeth. A central side surface of the drill bit body is provided with a through hole which is internally provided with two cutting wings that are symmetrically equipped in a vertical direction. Each cutting wing is hinged with the through hole. Opposite end faces of the two cutting wings are provided with air outlets. Each cutting wing is internally provided with an air outlet pipe. One end of each air outlet pipe is connected with the air outlet, and the other end is connected with the pipe on the drill bit body through a pipe on a central shaft. According to the PDC drilling and expanding double-wing combined drill bit, through equipping two cutting wings on the drill bit body, the drill bit bears uniform force in performing hole expansion to the coal seam. Bending moment which is bear by the central shaft and the cutting wings is reduced. The PDC drilling and expanding double-wing combined drill bit can be used for hole drilling and expansion of harder coal seam and has stable operation in working.
Description
Technical field
The utility model relates to a kind of drill bit, relates in particular to a kind of drill bit that has the reaming function.
Background technology
The safety in colliery is the essential condition of Coal Production, and gas is one of key factor that influences Safety of Coal Mine Production, and coal-face gas is outstanding, the coal-bed gas blast has caused very big economic loss and casualties when coal production.The highly gassy mine in the whole nation all is used as administer gas as the emphasis of trouble free service, and highly gassy mine generally adopts the coal winning technology of " take out earlier, then adopt " now.Promptly drill through the coal seam that to exploit through the rock stratum adjacent earlier, enlarge the hole in coal seam then, increase the outburst amount of coal-bed gas with the coal seam; Extract gas out with pump drainage equipment, wherein the passage of gas pumping mainly carries out through boring, two steps of reaming, takes PDC to bore, expand the single-blade combined drill in the prior art and accomplishes boring, reaming; Its structure is as shown in Figure 1, with some cutting teeths 2 ' are installed, offers a rectangular opening 9 ' in the front portion of drill main body 1 ' on the medial side surface; The one cutting wing 6 ' is installed in the rectangular opening 9 '; The rear portion of the cutting wing 6 ' and rectangular opening 9 ' are hinged through central axis 5 ' near the position at drill main body 1 ' rear portion, and the front portion of the cutting wing 6 ' is installed with some cutting teeths 2 ', in the upper surface of the cutting wing 6 '; And offer gas outlet 7 ' on the position near the cutting wing 6 ' front portion; Offer a cannelure 10 ' on the external surface at drill main body 1 ' middle part, limit spring 11 ' is installed in the cannelure 10 ', be used to prevent to cut the wing 6 ' and in rectangular opening 9 ', screw out.The operating principle that PDC bored, expanded the single-blade combined drill is: drill bit is connected with drilling rod, opens rig drill bit is moved forward to rock surface, begin boring; When the limit spring on the drill bit during apart from 1.5 centimetres of rock surfaces, rig quits work, and limit spring is taken off; Open rig then and continue boring; After arriving the coal seam, spray from the gas outlet on the cutting wing 6 ' through control compressed air, form a deboost; Make the cutting wing 6 ' open an angle, contact with coal seam 13 '; As shown in Figure 2, when drill bit continue rotation and march forward to the time, under the acting in conjunction of thrust and centrifugal force, the cutting wing 6 ' is opened fully, formation coal seam 13 ' full-scale reaming; Going out the bits situation and creeping into change in torque according to rock pore; After confirming to have accomplished boring, ream operation, switch the rig gear, drill bit is retreated while rotating; When the drill bit cutting wing touches the rock inwall; Rock gives the cutting wing thrust, forces the cutting wing to be got back in the drill body, accomplishes brill, the expansion operation in a gas exhaust hole.But this drill bit only is suitable for softer coal seam, and for harder coal seam, during single-blade rotation cutting, bit force is uneven, and easy generation is trembled, and it is not steady to work.
The utility model content
The technical problem that the utility model will solve provides a kind of combined type drill bit of easy and simple to handle, working stability, can be used in the hole drilling and reaming than hard coal seam.
The utility model PDC bores, expands the double-vane combined drill; Be installed with some cutting teeths in the front portion of drill main body, the rear portion of drill main body is provided with fixing body, wherein on the medial side surface of drill main body, offers a through hole; Two cutting wings are installed in the through hole; Symmetric arrangement about two cutting wings, the rear portion of each cutting wing is all hinged through central axis and through hole, and each cutting wing all can be put into through hole fully; Be installed with some cutting teeths on each cutting wing; On two cutting wing front portions and opposing end faces, offer the gas outlet, the inside of each cutting wing offers outlet pipe, and an end of outlet pipe is connected with the gas outlet; The other end of outlet pipe is all through pipeline on the central axis and the pipeline connection on the drill main body, and drill main body is anterior to be composite polycrystal-diamond with the anterior cutting teeth of installing of the cutting wing.
The utility model PDC bores, expands the double-vane combined drill, and the cutting teeth on wherein said each cutting wing is the single face setting, and the cutting teeth on two cutting wings is on homonymy not.
The utility model PDC bores, expands the double-vane combined drill, offers two installing holes that are connected with through hole on the medial side surface of wherein said drill main body, and installing hole is a stepped hole; Two installing holes are relative with two cutting wings respectively; Each cuts on the wing side relative with installing hole and all offers groove, is provided with a location device in each installing hole, and each positioner includes connector, elastic body and fixed body; The inner end face of connector is arc surface, taper seat or round table surface; The inner of connector is entrenched in the corresponding groove after passing the aperture of installing hole, and the maximum outside diameter place of connector is positioned at the macropore of installing hole, and elastomeric the inner contacts with the outer end of connector; Elastomeric outer end contacts with the inner of fixed body, and fixed body is fixedly mounted in the macropore of installing hole.
The utility model PDC bores, expands the double-vane combined drill, offers two installing holes that are connected with through hole on the medial side surface of wherein said drill main body, and two installing holes are relative with two cutting wings respectively; Each cuts on the wing side relative with installing hole and all offers groove; Be provided with a location device in each installing hole, each positioner includes connector, elastic body and fixed body, and the inner of connector is arc surface, taper seat or round table surface; The inner of connector is entrenched in the corresponding groove; Elastomeric the inner contacts with the outer end of connector, and elastomeric outer end contacts with the inner of fixed body, and fixed body is fixedly mounted in the macropore of installing hole; When the rotation of the cutting wing, the inner of connector keeps contacting with the cutting wing.
The utility model PDC bores, expands the double-vane combined drill, and all perpendicular to the side of the cutting wing, connector is a steel ball to the axis of wherein said each installing hole, and elastic body is a stage clip.
The utility model PDC bores, expands the double-vane combined drill, and wherein said through hole is that cross section is the rectangular opening of rectangle, the center line of through hole and the intersect vertical axis of drill main body.
The utility model PDC bores, expands double-vane combined drill, the axis of wherein said central axis and the intersect vertical axis of drill main body.
The utility model PDC bores, expands the double-vane combined drill, and the rear end face of wherein said each cutting wing is arc surface, and the radius of arc surface is not more than the distance of the axis of central axis to the through hole trailing flank.
The utility model PDC bores, expands double-vane combined drill difference from prior art and is that the utility model is through being provided with two cutting wings of symmetrical distribution on drill main body; Make drill bit in the coal seam during reaming; Stressed even, reduce central axis and the moment of flexure that the cutting wing bears, adopt this structure; Can be used in hole drilling and reaming, working stability than hard coal seam.
The utility model PDC bores, expands the double-vane combined drill through positioner is set, and wherein steel ball is entrenched under the effect of stage clip pressure in the groove of the cutting wing, and the centrifugal force that produces when overcoming the drill bit rotation can not be opened the cutting wing when drill bit rotates at a high speed; Behind the pressure that strengthens compressed air or water, form high-speed jet, overcome the resistance of steel ball to groove, the cutting wing is opened.
Below in conjunction with accompanying drawing the utility model PDC being bored, expand the double-vane combined drill is described further.
Description of drawings
Fig. 1 looks sectional view for the master that prior art PDC bored, expanded the single-blade combined drill;
Fig. 2 looks sectional view (the cutting wing opens fully) for the master that prior art PDC bored, expanded the single-blade combined drill;
Fig. 3 looks sectional view for the master that the utility model PDC bored, expanded the double-vane combined drill;
Fig. 4 is the sectional drawing of the cutting wing in the utility model;
Fig. 5 bores, expands the vertical view cutaway drawing of double-vane combined drill for the utility model PDC;
Fig. 6 looks sectional view (the cutting alar part opens) for the master that the utility model PDC bored, expanded the double-vane combined drill;
Fig. 7 looks sectional view (the cutting wing opens fully) for the master that the utility model PDC bored, expanded the double-vane combined drill;
Fig. 8 looks sectional view (the cutting alar part is regained) for the master that the utility model PDC bored, expanded the double-vane combined drill.
The specific embodiment
Like Fig. 3, Fig. 4, shown in Figure 5, the utility model PDC bores, expands the double-vane combined drill, is installed with some cutting teeths 2 in the front portion of drill main body 1; The rear portion of drill main body 1 is provided with fixing body 3; On the medial side surface of drill main body 1, offering a cross section is the through hole 4 of rectangle, and the intersect vertical axis of the center line of through hole 4 and drill main body 1 is equipped with two cutting wings 5 in the through hole 4; Two cutting wings symmetric arrangement about in the of 5; The rear portion of each cutting wing 5 is all hinged through central axis 8 and through hole 4, the intersect vertical axis of the axis of central axis 8 and drill main body 1, and each cutting wing 5 all can be put into through hole 4 fully; Rear end face of each cutting wing 5 is arc surface, and the radius of arc surface equals the distance in the axis of central axis 8 to through hole 4 trailing flanks.Be installed with some cutting teeths 2 on each cutting wing 5; Cutting teeth 2 on each cutting wing 5 is the single face setting; And the cutting teeth 2 of two cuttings on the wing 5 is on homonymy not; On two the cutting wing 5 front portions and opposing end faces, offer gas outlet 6, the inside of each cutting wing 5 offers outlet pipe 7, and an end of outlet pipe 7 is connected with gas outlet 6; The other end of outlet pipe 7 is all through the pipeline connection on pipeline on the central axis 8 and the drill main body 1, and drill main body 1 anterior cutting teeths 2 with the 5 anterior installations of the cutting wing are composite polycrystal-diamond.
On the medial side surface of drill main body 1, offer two installing holes 9 that are connected with through hole 4, installing hole 9 is a stepped hole, and two installing holes 9 are relative with two cutting wings 5 respectively; And the axis normal of installing hole 9 is in the side of the cutting wing 5, and each cutting wing 5 and installing hole 9 all offer groove 10 on the relative side, are provided with a location device 11 in each installing hole 9; Each positioner 11 includes connector 12, elastic body 13 and fixed body 14; Connector 12 is a steel ball, and elastic body 13 is a stage clip, and fixed body 14 is a screw; Steel ball is entrenched in the corresponding groove 10 after partly passing the aperture of installing hole 9; The inner of stage clip contacts with the outer end of steel ball, and the outer end of stage clip contacts with the inner of screw, and screw is installed in the macropore of installing hole 9.
The utility model PDC bores, expands the double-vane combined drill when work, at first is connected the fixing body at drill bit rear portion with drilling rod, opens rig drill bit is moved forward to rock surface, begins boring; In drilling process, according to geologic parameter, drilling depth, creep into change in torque and the chip removal situation judges whether to reach the coal seam, after arriving the coal seam; As shown in Figure 6, strengthen compressed air pressure to 2MPa-2.5MPa (former compressed air pressure is 1MPa), make compressed air pass through two gas outlet ejections on the cutting wing 5; The two cutting wings, 5 ejection jets interact, and form two deboosts, overcome the resistance of spring-steel ball to the cutting wing; Make the cutting wing 5 open an angle, contact with coal seam 16; When drill bit continue rotation and march forward to the time, as shown in Figure 7, under the acting in conjunction of thrust and centrifugal force, the two cutting wings 5 are opened fully, formation coal seam 16 full-scale reamings; According to the going out the bits situation and creep into change in torque of rock pore, after confirming to have accomplished boring, ream operation, switching rig gear; Drill bit is retreated while rotating, as shown in Figure 8, when the drill bit cutting wing 5 touches the rock inwall; Rock gives the cutting wing thrust, forces the cutting wing to be got back in the drill body, when being the multilayer coal seam as if the work coal seam; When the cutting wing 5 was got back in the drill body, the rig gearshift moved forward to down one deck rock stratum 17; Continue boring, open the cutting wing after arriving second coal seam, realize the hole drilling and reaming in multilayer coal seam.
The utility model PDC bores, expands the double-vane combined drill; Wherein installing hole can also be through hole; Its outer end is processed with screw thread, and the installing hole axis is to the distance of central axis (central axis of the cutting wing that contacts with steel ball in the installing hole) the axis radius less than the cutting wing (the cutting wing that contacts with steel ball in the installing hole) rear end arc surface.
The utility model PDC bores, expands the double-vane combined drill, and wherein connector can also be round platform or circular cone.
Above-described embodiment describes the preferred implementation of the utility model; Be not that scope to the utility model limits; Under the prerequisite that does not break away from the utility model design spirit; Various distortion and improvement that those of ordinary skills make the technical scheme of the utility model all should fall in the definite protection domain of the utility model claims.
Claims (8)
1. a PDC bores, expands the double-vane combined drill; Be installed with some cutting teeths (2) in the front portion of drill main body (1); The rear portion of drill main body (1) is provided with fixing body (3); It is characterized in that: on the medial side surface of drill main body (1), offer a through hole (4), two cutting wings (5) are installed in the said through hole (4), said two cutting wings (5) are symmetric arrangement up and down; The rear portion of each cutting wing (5) is all hinged through central axis (8) and through hole (4); Said each cutting wing (5) all can be put into through hole (4) fully, is installed with some cutting teeths (2) on each cutting wing (5), on two the cutting wing (5) front portions and opposing end faces, offers gas outlet (6); The inside of said each cutting wing (5) offers outlet pipe (7); One end of said outlet pipe (7) is connected with gas outlet (6), and the other end of outlet pipe (7) is all through the pipeline connection on pipeline on the central axis (8) and the drill main body (1), and said drill main body (1) is anterior to be composite polycrystal-diamond with the anterior cutting teeth of installing (2) of the cutting wing (5).
2. PDC according to claim 1 bores, expands the double-vane combined drill, it is characterized in that: the cutting teeth (2) on said each cutting wing (5) is the single face setting, and the cutting teeth (2) on two cutting wings (5) is on homonymy not.
3. PDC according to claim 2 bores, expands the double-vane combined drill; It is characterized in that: offer two installing holes (9) that are connected with through hole (4) on the medial side surface of said drill main body (1); Said installing hole (9) is a stepped hole; Two installing holes (9) are relative with two cutting wings (5) respectively; Each cuts on the wing (5) side relative with installing hole (9) and all offers groove (10), is provided with a location device (11) in said each installing hole (9), and said each positioner (11) includes connector (12), elastic body (13) and fixed body (14); The inner end face of said connector (12) is arc surface, taper seat or round table surface; The inner of said connector (12) is entrenched in the corresponding groove (10) after passing the aperture of installing hole (9), and the maximum outside diameter place of said connector (12) is positioned at the macropore of installing hole (9), and the inner of said elastic body (13) contacts with the outer end of connector (12); The outer end of elastic body (13) contacts with the inner of fixed body (14), and fixed body (14) is fixedly mounted in the macropore of installing hole (9).
4. PDC according to claim 2 bores, expands the double-vane combined drill; It is characterized in that: offer two installing holes (9) that are connected with through hole (4) on the medial side surface of said drill main body (1); Two installing holes (9) are relative with two cutting wings (5) respectively, and each cuts on the wing (5) side relative with installing hole (9) and all offers groove (10), are provided with a location device (11) in said each installing hole (9); Said each positioner (11) includes connector (12), elastic body (13) and fixed body (14); The inner of said connector (12) is arc surface, taper seat or round table surface, and the inner of said connector (12) is entrenched in the corresponding groove (10), and the inner of said elastic body (13) contacts with the outer end of connector (12); The outer end of elastic body (13) contacts with the inner of fixed body (14); Fixed body (14) is fixedly mounted in the macropore of installing hole (9), and when the cutting wing (5) rotation, the inner of connector (12) keeps contacting with the cutting wing (5).
5. bore, expand the double-vane combined drill according to claim 3 or 4 described PDC, it is characterized in that: all perpendicular to the side of the cutting wing (5), said connector (12) is a steel ball to the axis of said each installing hole (9), and said elastic body (13) is a stage clip.
6. PDC according to claim 5 bores, expands the double-vane combined drill, and it is characterized in that: said through hole (4) is that cross section is the rectangular opening of rectangle, the intersect vertical axis of the center line of said through hole (4) and drill main body (1).
7. PDC according to claim 6 bores, expands the double-vane combined drill, it is characterized in that: the intersect vertical axis of the axis of said central axis (8) and drill main body (1).
8. PDC according to claim 7 bores, expands the double-vane combined drill, it is characterized in that: the rear end face of said each cutting wing (5) is arc surface, and the radius of said arc surface is not more than the distance of the axis of central axis (8) to through hole (4) trailing flank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202375916U CN202181847U (en) | 2011-07-07 | 2011-07-07 | PDC drilling and expanding double-wing combined drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202375916U CN202181847U (en) | 2011-07-07 | 2011-07-07 | PDC drilling and expanding double-wing combined drill bit |
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| Publication Number | Publication Date |
|---|---|
| CN202181847U true CN202181847U (en) | 2012-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202375916U Expired - Fee Related CN202181847U (en) | 2011-07-07 | 2011-07-07 | PDC drilling and expanding double-wing combined drill bit |
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| Country | Link |
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| CN (1) | CN202181847U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499944A (en) * | 2014-11-26 | 2015-04-08 | 西安泾渭超硬材料有限公司 | Diamond composite sheet reamer |
| CN106320987A (en) * | 2016-08-19 | 2017-01-11 | 李泓胜 | Inner reaming PDC (polycrystalline diamond compact) drill bit |
| CN106337656A (en) * | 2016-08-19 | 2017-01-18 | 李泓胜 | PCD drill bit capable of reaming hole forcibly and internally |
| CN109236190A (en) * | 2018-10-31 | 2019-01-18 | 山西晋城无烟煤矿业集团有限责任公司 | Double-vane waterpower, which expands, rushes integration drills technique |
| CN112252983A (en) * | 2020-11-04 | 2021-01-22 | 中国矿业大学(北京) | Hydraulic hole expanding drill bit |
-
2011
- 2011-07-07 CN CN2011202375916U patent/CN202181847U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499944A (en) * | 2014-11-26 | 2015-04-08 | 西安泾渭超硬材料有限公司 | Diamond composite sheet reamer |
| CN104499944B (en) * | 2014-11-26 | 2017-09-22 | 西安泾渭超硬材料有限公司 | A kind of diamond compact reamer |
| CN106320987A (en) * | 2016-08-19 | 2017-01-11 | 李泓胜 | Inner reaming PDC (polycrystalline diamond compact) drill bit |
| CN106337656A (en) * | 2016-08-19 | 2017-01-18 | 李泓胜 | PCD drill bit capable of reaming hole forcibly and internally |
| CN106320987B (en) * | 2016-08-19 | 2018-08-31 | 沧州格锐特钻头有限公司 | A kind of interior reaming PDC drill bit |
| CN109236190A (en) * | 2018-10-31 | 2019-01-18 | 山西晋城无烟煤矿业集团有限责任公司 | Double-vane waterpower, which expands, rushes integration drills technique |
| CN112252983A (en) * | 2020-11-04 | 2021-01-22 | 中国矿业大学(北京) | Hydraulic hole expanding drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120404 Termination date: 20140707 |
|
| EXPY | Termination of patent right or utility model |