CN202073499U - PDC (polycrystalline diamond compact) drilling and expanding single-wing combined drill bit - Google Patents

PDC (polycrystalline diamond compact) drilling and expanding single-wing combined drill bit Download PDF

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Publication number
CN202073499U
CN202073499U CN2011201816729U CN201120181672U CN202073499U CN 202073499 U CN202073499 U CN 202073499U CN 2011201816729 U CN2011201816729 U CN 2011201816729U CN 201120181672 U CN201120181672 U CN 201120181672U CN 202073499 U CN202073499 U CN 202073499U
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CN
China
Prior art keywords
cutting
cutting wing
drill
wing
pdc
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011201816729U
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Chinese (zh)
Inventor
沈康明
乔志军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HUAINAN ZHIJUN DRILLING MACHINES TOOLS CO Ltd
Original Assignee
HUAINAN ZHIJUN DRILLING MACHINES TOOLS CO Ltd
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Application filed by HUAINAN ZHIJUN DRILLING MACHINES TOOLS CO Ltd filed Critical HUAINAN ZHIJUN DRILLING MACHINES TOOLS CO Ltd
Priority to CN2011201816729U priority Critical patent/CN202073499U/en
Application granted granted Critical
Publication of CN202073499U publication Critical patent/CN202073499U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a drill bit with a hole expanding function, in particular to a PDC (polycrystalline diamond compact) drilling and expanding single-wing combined drill bit, and aims to provide a combined drill bit which is simple and convenient to operate, can ream a hole as required while drilling, and is high in working efficiency. A plurality of cutting teeth are fixedly installed at the front part of a drill bit main body; a through hole is formed in the side surface of the middle of the drill bit main body; a cutting wing is hinged inside the through hole; a plurality of cutting teeth are fixedly installed at the front part of the cutting wing; a vent hole is formed in the upper end surface of the cutting wing and near the front part of the cutting wing; a ventilating pipeline is arranged inside the cutting wing; the ventilating pipeline is connected with the vent hole; and the other end of the ventilating pipeline is communicated with a pipeline on the drill bit main body. Through the adoption of the structure that the cutting wing is installed in the middle of the drill bit main body, the cutting wing can be opened as required at any time while drilling, and can ream the hole while drilling, without changing the drill bit; and the working efficiency is high.

Description

PDC bores, expands the single-blade combined drill
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 by the rock stratum adjacent the coal seam that will exploit is drilled through earlier, then the hole in coal seam is enlarged, increase the outburst amount of coal-bed gas, gas is extracted out with pump drainage equipment with the coal seam.Wherein the passage of gas pumping is mainly undertaken by boring, two steps of reaming: at first bore a pilot hole by rock to the coal seam direction.Withdraw from drill bit, drilling rod then; Change reamer then, reamer and drilling rod are goed deep into the coal seam carry out reaming.But adopt this technology when getting into the coal seam, change reamer again after drill bit, drilling rod need being withdrawed from, go deep into the coal seam reaming, cause invalid drilling time long, inefficiency.
The utility model content
The technical problems to be solved in the utility model provides a kind of combined type drill bit easy and simple to handle, can carry out reaming, high efficiency when boring as required simultaneously.
The utility model PDC bores, expands the single-blade combined drill, is installed with some cutting teeths in the front portion of drill main body, and the rear portion of drill main body is provided with fixing body; On the medial side surface of drill main body, offer a through hole, the one cutting wing is installed in the through hole, the rear portion of the cutting wing and through hole are hinged by central axis near the position at drill main body rear portion, the cutting wing can be put into through hole fully after central axis rotates, the front portion of the cutting wing is installed with some cutting teeths, upper surface at the cutting wing, and offer the gas outlet on the position near cutting wing front portion, the inside of the cutting wing offers outlet pipe, outlet pipe is connected with the gas outlet, and the other end of outlet pipe is by pipeline on the central axis and the pipeline connection on the drill main body; Drill main body cutting teeth anterior and the anterior installation of the cutting wing is composite polycrystal-diamond.
The utility model PDC bores, expands the single-blade combined drill, and wherein said through hole is that cross section is the rectangular opening of rectangle, the center line of rectangular opening and the intersect vertical axis of drill main body.
The utility model PDC bores, expands single-blade 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 single-blade combined drill, the rear end face and the lower surface of the wherein said cutting wing are orthogonal, and the rear end face of the cutting wing is connected by arc surface with the lower surface, rear end face, the lower surface of the cutting wing are all tangent with arc surface, and the radius of arc surface equals the distance of the axis of central axis to the rectangular opening trailing flank.
The utility model PDC bores, expands the single-blade combined drill, offers a cannelure on the external surface at wherein said drill main body middle part, and cannelure is positioned at the place ahead of central axis, and near the position of cutting wing front portion; Limit spring is installed in the cannelure, and it is circular that limit spring becomes, and the two ends of limit spring are respectively equipped with a handle.
The utility model PDC bores, expands single-blade combined drill difference from prior art and is that the utility model passes through at the middle part of drill main body the cutting wing to be installed, can when boring, open the cutting wing as required at any time, in boring, finish reaming, need not more bit change and can finish reaming, high efficiency.
Below in conjunction with accompanying drawing the utility model PDC being bored, expand the single-blade combined drill is described further.
Description of drawings
Fig. 1 looks sectional view for the master that the utility model PDC bored, expanded the single-blade combined drill;
Fig. 2 bores, expands the vertical view of single-blade combined drill for the utility model PDC;
Fig. 3 bores, expands the front view of limit spring in the single-blade combined drill for the utility model PDC;
Fig. 4 bores, expands the vertical view of limit spring in the single-blade combined drill for the utility model PDC;
Fig. 5 bores, expands the working state figure (the cutting alar part opens) of single-blade combined drill for the utility model PDC;
Fig. 6 bores, expands the working state figure (the cutting wing opens fully) of single-blade combined drill for the utility model PDC.
The specific embodiment
As shown in Figure 1 and Figure 2, the utility model PDC bores, expands the single-blade combined drill, be screwed in the front portion of drill main body 1 some cutting teeths 2 are installed, the rear portion of drill main body 1 is provided with fixing body 3, on the medial side surface of drill main body 1, offer a rectangular opening 9, the intersect vertical axis of the center line of rectangular opening 9 and drill main body 1; The one cutting wing 6 is installed in the rectangular opening 9, and the rear portion of the cutting wing 6 and rectangular opening 9 are hinged by central axis 5 near the position at drill main body 1 rear portion, the intersect vertical axis of the axis of central axis 5 and drill main body 1.The cutting wing 6 can be put into through hole 4 fully after central axis 5 rotations, the rear end face and the lower surface of the cutting wing 6 are orthogonal, and the rear end face of the cutting wing 6 is connected by arc surface with the lower surface, rear end face, the lower surface of the cutting wing 6 are all tangent with arc surface, and the radius of arc surface equals the distance of the axis of central axis 5 to rectangular opening 9 trailing flanks.The front portion of the cutting wing 6 is screwed some cutting teeths 2 is installed, upper surface at the cutting wing 6, and offer gas outlet 7 on the position near the cutting wing 6 front portions, the inside of the cutting wing 6 offers outlet pipe 8, outlet pipe 8 is connected with gas outlet 7, and the other end of outlet pipe 8 is by the pipeline on the central axis 5 and the pipeline connection at drill main body 1 rear portion.State on the external surface at drill main body 1 middle part and offer a cannelure 10, cannelure 10 is positioned at the place ahead of central axis 5, and near the position of the cutting wing 6 front portions; Limit spring 11 is installed in the cannelure 10, is used to prevent to cut the wing 6 and screws out in rectangular opening 9, in conjunction with Fig. 3, shown in Figure 4,11 one-tenth of limit spring are circular, made by spring steel, and the two ends of limit spring 11 are respectively equipped with a handle 12.Drill main body 1 cutting teeths 2 anterior and the 6 anterior installations of the cutting wing are composite polycrystal-diamond in the utility model.
The utility model PDC bores, expands the single-blade combined drill when work, at first the fixing body at drill bit rear portion is connected with drilling rod, opens rig drill bit is moved forward to rock surface, begins boring; When the limit spring on the drill bit during apart from 1.5 centimetres of rock surfaces, rig quits work, handle by the pulling limit spring, limit spring is taken off, open rig then and continue 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 5, spray from the gas outlet on the cutting wing 6, form a deboost by control compressed air, make the cutting wing 6 open an angle, contact with coal seam 13; When drill bit continue rotation and march forward to the time, as shown in Figure 6, under the acting in conjunction of thrust and centrifugal force, the cutting wing 6 is opened fully, forms coal seam 13 full-scale reamings; Going out the bits situation and creeping into change in torque according to rock pore, after determining to have finished 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, finishes brill, the expansion operation in a gas exhaust hole.
Above-described embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; 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 solution of the utility model all should fall in the definite protection domain of the utility model claims.

Claims (5)

1.PDC bore, expand the single-blade 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), the one cutting wing (6) is installed in the described through hole (4), the rear portion of the described cutting wing (6) and through hole (4) are hinged by central axis (5) near the position at drill main body (1) rear portion, the described cutting wing (6) can be put into through hole (4) fully after central axis (5) rotation, the front portion of the described cutting wing (6) is installed with some cutting teeths (2), upper surface at the described cutting wing (6), and offer gas outlet (7) on the position near the cutting wing (6) front portion, the inside of the described cutting wing (6) offers outlet pipe (8), described outlet pipe (8) is connected with gas outlet (7), the other end of outlet pipe (8) is by pipeline on the central axis (5) and the pipeline connection on the drill main body (1), and described drill main body (1) cutting teeth (2) anterior and that install the cutting wing (6) front portion is composite polycrystal-diamond.
2. PDC according to claim 1 bores, expands the single-blade combined drill, and it is characterized in that: described through hole (4) is that cross section is the rectangular opening (9) of rectangle, the intersect vertical axis of the center line of described rectangular opening (9) and drill main body (1).
3. PDC according to claim 2 bores, expands the single-blade combined drill, it is characterized in that: the intersect vertical axis of the axis of described central axis (5) and drill main body (1).
4. PDC according to claim 3 bores, expands the single-blade combined drill, it is characterized in that: the rear end face and the lower surface of the described cutting wing (6) are orthogonal, and the rear end face of the cutting wing (6) is connected by arc surface with the lower surface, rear end face, the lower surface of the cutting wing (6) are all tangent with arc surface, and the radius of described arc surface equals the distance of the axis of central axis (5) to rectangular opening (9) trailing flank.
5. PDC according to claim 4 bores, expands the single-blade combined drill, it is characterized in that: offer a cannelure (10) on the external surface at described drill main body (1) middle part, described cannelure (10) is positioned at the place ahead of central axis (5), and near the anterior position of the cutting wing (6); Limit spring (11) is installed in the described cannelure (10), and it is circular that described limit spring (11) becomes, and the two ends of limit spring (11) are respectively equipped with a handle (12).
CN2011201816729U 2011-06-01 2011-06-01 PDC (polycrystalline diamond compact) drilling and expanding single-wing combined drill bit Expired - Fee Related CN202073499U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201816729U CN202073499U (en) 2011-06-01 2011-06-01 PDC (polycrystalline diamond compact) drilling and expanding single-wing combined drill bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201816729U CN202073499U (en) 2011-06-01 2011-06-01 PDC (polycrystalline diamond compact) drilling and expanding single-wing combined drill bit

Publications (1)

Publication Number Publication Date
CN202073499U true CN202073499U (en) 2011-12-14

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104405290A (en) * 2014-11-28 2015-03-11 淮南宏昌科技有限责任公司 Reamer bit for drilling through coal seam to pre-extract gas
CN104863515A (en) * 2015-06-11 2015-08-26 鞍山紫竹工程设备制造有限公司 Rock breaking drill bit applied to hydraulic multifunctional pile driver
CN110630181A (en) * 2019-08-27 2019-12-31 中国矿业大学 Coal seam reaming and permeability increasing method utilizing pneumatic coupling effect

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104405290A (en) * 2014-11-28 2015-03-11 淮南宏昌科技有限责任公司 Reamer bit for drilling through coal seam to pre-extract gas
CN104863515A (en) * 2015-06-11 2015-08-26 鞍山紫竹工程设备制造有限公司 Rock breaking drill bit applied to hydraulic multifunctional pile driver
CN110630181A (en) * 2019-08-27 2019-12-31 中国矿业大学 Coal seam reaming and permeability increasing method utilizing pneumatic coupling effect

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20111214

Termination date: 20140601