CN206693920U - Expansive bit for coal bed drilling - Google Patents
Expansive bit for coal bed drilling Download PDFInfo
- Publication number
- CN206693920U CN206693920U CN201720324994.1U CN201720324994U CN206693920U CN 206693920 U CN206693920 U CN 206693920U CN 201720324994 U CN201720324994 U CN 201720324994U CN 206693920 U CN206693920 U CN 206693920U
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- China
- Prior art keywords
- cylindrical section
- inner sleeve
- outer tube
- external diameter
- cylindrical
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Abstract
Expansive bit for coal bed drilling, including the head with central passage and bar portion, head front end is fixedly installed diamond segment, head front end offers the mud hole connected with central passage, bar portion includes inner sleeve and coaxial package the outer tube outside inner sleeve, and the reducing bearizing mechanism that operation end extends radially out outer tube is provided between outer tube and inner sleeve.For the utility model during bore operation, chisel edge stress slides in and out telescopic mast, the rotation of diamond retractable blade carries out ream operation so as to the compression spring inside top pressure.When chisel edge stress disappears, telescopic mast can return to initial position identical with drilling rod external diameter, can now extract the utility model and drilling rod out.The utility model carries out drilling reaming on the basis of using existing drilling rod external diameter size, improves gas pumping speed, and is easy to extract drilling rod out, reduces the difficulty of construction.
Description
Technical field
The utility model belongs to coal mine gas extraction drill hole technical field of construction, more particularly to a kind of for coal bed drilling
Expansive bit.
Background technology
Gas is always the major issue for influenceing Safety of Coal Mine Production, and the main prophylactico-therapeutic measures taken at present is drilling construction
Screen casing is transferred afterwards so as to carry out gas pumping.Most of coal seam in China belongs to weak seam, and carrying out drilling with normal drill bit applies
In man-hour, because weak seam pore-creating character is poor, hole wall is extremely unstable, and drilling easily occurs and collapses, causes drill bit not take out, after being
Continuous mechanical coal mining adds potential safety hazard.In addition, in boring procedure, existing normal drill bit is due to the work(that only drills
Can, it is impossible to which reaming, drilling back aperture is smaller, and space is limited in drilling, and the gas pumping pipe diameter of decentralization is smaller, influences gas
Extraction efficiency.
Utility model content
The utility model is in order to solve weak point of the prior art, there is provided one kind can drill and can reaming, drill bit
It is easy to the expansive bit for coal bed drilling extracted out out of drilling.
In order to solve the above technical problems, the utility model adopts the following technical scheme that：Telescopic brill for coal bed drilling
Head, including the head with central passage and bar portion, head front end are fixedly installed diamond segment, head front end offer with
The mud hole of central passage connection, bar portion include inner sleeve and coaxial package the outer tube outside inner sleeve, inner sleeve pipe outer wall by
Be followed successively by the first cylindrical section, flat part and the second cylindrical section before backward, flat part include centrosymmetric two planar structures and
Two globoidal structures, planar structure and globoidal structure are along the circumferential direction arranged alternately, the external diameter of globoidal structure and the second cylindrical section
External diameter it is equal, the external diameter of the second cylindrical section is more than the external diameter of the first cylindrical section, and the second cylindrical section back-end central symmetrically offers
Two mounting grooves, the rear end of each mounting groove is corresponding to be connected insertion with the front side edge of a planar structure；Second cylindrical section outer wall
External splines structure is provided with, the second cylindrical section front inner wall is provided with female thread structure, and the rear end on head is stretched into and is threadedly coupled
In female thread structure；
Outer tube front end outer wall is provided with external thread structure, and outer sleeve inner wall is followed successively by the first cylindrical hole, from the front to the back
Two cylindrical holes and internal spline structure, the external diameter of the first cylindrical section is equal with the internal diameter of the first cylindrical hole, the external diameter of the second cylindrical section
It is equal with the internal diameter of the second cylindrical hole, ring-shaped step knot is formed between the front end of the rear end of the second cylindrical hole and the first cylindrical hole
Structure, the first cylindrical section rear portion are plugged in the first cylindrical hole, external splines structure and internal spline structure engagement assembling, outer tube front end
Stop nut is threaded with, the inwall of stop nut is provided with the sealing ring for sealing and being slidably matched with the second cylindrical section, limit
Position nut front end face is provided with diamond and fixes blade；
The reducing bearizing mechanism that operation end extends radially out outer tube is provided between outer tube and inner sleeve.
Reducing bearizing mechanism includes compression spring, two telescopic masts and two pilot holes, compression spring and is sleeved on the first circle
Outside shell of column, the front-end and back-end of compression spring coordinate with flat part rear end face and ring-shaped step structure top pressure respectively, it is assumed that along interior
The direction that the radial direction of sleeve pipe points to inner sleeve tube hub is the direction of ecto-entad, pilot hole be opened on outer tube and with peace
Corresponding inside and outside tankage, the second cylindrical section is symmetrically arranged with guide groove in the left side of mounting groove and right side, guide groove with inner sleeve
The distance of heart line is gradually reduced by front end to rear end, and the inner left side of telescopic mast and right side are respectively arranged with and be assemblied in guide groove
Guide pillar, telescopic mast radially pass through pilot hole, and the cross section of pilot hole and telescopic mast is rectangular configuration, telescopic mast outer end
Sidepiece is provided with insert groove, and the diamond retractable blade with telescopic mast welding is provided with insert groove.
Using above-mentioned technical proposal, before the outer tube front end outer wall in the utility model is provided with external thread structure and drilling rod
End connection.Power drive unit drives drilling rod and the utility model rotation, and diamond segment carries out bore operation, and diamond is fixed
The rotation of blade first carries out the reaming of certain radius, when diamond segment runs into larger resistance, head back top pressure inner sleeve,
Inner sleeve overcomes the elastic force of compression spring to be moved rearwards along outer sleeve inner wall, because guide groove is also with being moved rearwards, and leads
It is gradually reduced to the distance of groove and inner sleeve center line by front end to rear end, the position of telescopic mast can only under the restriction of pilot hole
Move radially, guide pillar of the guide groove driving on the telescopic mast in mounting groove is displaced outwardly, and telescopic mast is with regard to protruding overcoat
The segment distance of pipe one simultaneously keeps definite value, and the step that is rotated into of diamond retractable blade carries out reaming drilling operation.
After drilling reaches predetermined hole depth, the utility model and drilling rod are dropped back a small distance, inner sleeve, telescopic mast are being pressed
Initial position is returned in the presence of contracting spring, drilling rod and external diameter of the present utility model are significantly less than the internal diameter of drilling, so
With regard to extracting drilling rod and drill bit out without resistance in the least.
During bore operation, chisel edge stress makes to stretch the utility model so as to the compression spring inside top pressure
Post slides in and out, and the rotation of diamond retractable blade carries out ream operation.When chisel edge stress disappears, telescopic mast can return to
Initial position identical with drilling rod external diameter, can now extract the utility model and drilling rod out.The utility model is using outside existing drilling rod
Drilling reaming is carried out on the basis of the size of footpath, improves gas pumping speed, and is easy to extract drilling rod out, reduces the difficulty of construction.
Brief description of the drawings
Fig. 1 is assembling schematic diagram of the present utility model；
Fig. 2 is the structural representation of inner sleeve in Fig. 1；
Fig. 3 is A-A sectional views in Fig. 2；
Fig. 4 is B-B sectional views in Fig. 2；
Fig. 5 is C-C sectional views in Fig. 2；
Fig. 6 is the structural representation of outer tube in Fig. 2；
Fig. 7 is D-D sectional views in Fig. 6；
Fig. 8 is the structural representation of telescopic mast in Fig. 1；
Fig. 9 is the dimensional structure diagram on head in Fig. 1.
Embodiment
As shown in Fig. 1-Fig. 9, the expansive bit of the present utility model for coal bed drilling, there is the head of central passage 17
Portion 15 and bar portion, the front end of head 15 are fixedly installed diamond segment 16, and the front end of head 15 offers to be connected with central passage 17
Mud hole 18, bar portion includes inner sleeve 19 and coaxial package the outer tube 20 outside inner sleeve 19, and the outer wall of inner sleeve 19 is by rear
The first cylindrical section 21, the cylindrical section 23 of flat part 22 and second are followed successively by forward, and flat part 22 includes centrosymmetric two planes
Structure 24 and two globoidal structures 25, planar structure 24 and globoidal structure 25 are along the circumferential direction arranged alternately, globoidal structure 25
External diameter is equal with the external diameter of the second cylindrical section 23, and the external diameter of the second cylindrical section 23 is more than the external diameter of the first cylindrical section 21, the second circle
The back-end central of shell of column 23 symmetrically offers two mounting grooves 26, and the rear end of each mounting groove 26 is corresponding with planar structure 24
Front side edge linking insertion；The outer wall of second cylindrical section 23 is provided with external splines structure 27, and the front inner wall of the second cylindrical section 23 is provided with
Female thread structure 28, the rear end on head 15 are stretched into and are threaded in female thread structure 28.
The front end outer wall of outer tube 20 is provided with external thread structure 29, and the inwall of outer tube 20 is followed successively by the first cylinder from the front to the back
Hole 30, the second cylindrical hole 31 and internal spline structure 32, the external diameter of the first cylindrical section 21 is equal with the internal diameter of the first cylindrical hole 30, the
The external diameter of two cylindrical sections 23 is equal with the internal diameter of the second cylindrical hole 31, before the rear end of the second cylindrical hole 31 and the first cylindrical hole 30
Ring-shaped step structure 33 is formed between end, the rear portion of the first cylindrical section 21 is plugged in the first cylindrical hole 30, the He of external splines structure 27
The engagement assembling of internal spline structure 32, for transmitting the moment of torsion of drilling operation, the nose threads of outer tube 20 are connected with stop nut 34,
The inwall of stop nut 34 is provided with the sealing ring 43 for sealing and being slidably matched with the second cylindrical section 23, the front end face of stop nut 34
It is provided with diamond and fixes blade 35；The change that operation end extends radially out outer tube 20 is provided between outer tube 20 and inner sleeve 19
Footpath bearizing mechanism.
Reducing bearizing mechanism includes 36, two telescopic masts 37 of compression spring and two pilot holes 38, compression spring 36 are set with
Outside the first cylindrical section 21, the front-end and back-end of compression spring 36 are pushed up with the rear end face of flat part 22 and ring-shaped step structure 33 respectively
Press-fit, it is assumed that along the radial direction of inner sleeve 19 point to inner sleeve 19 center direction be ecto-entad direction, pilot hole
38 are opened on outer tube 20 and corresponding with inside and outside mounting groove 26, and the second cylindrical section 23 is symmetrical in the left side of mounting groove 26 and right side
Be provided with guide groove 39, the rear edge of guide groove 39 is penetrating with the inwall front edge of mounting groove 26 and flushes, guide groove 39 with it is interior
The distance of the center line of sleeve pipe 19 is gradually reduced by front end to rear end, and the inner left side of telescopic mast 37 and right side are respectively arranged with and be assemblied in
Guide pillar 40 in guide groove 39, telescopic mast 37 radially pass through the cross section of pilot hole 38, pilot hole 38 and telescopic mast 37
It is rectangular configuration, the outer end sidepiece of telescopic mast 37 is provided with insert groove 41, is provided with what is welded with telescopic mast 37 at insert groove 41
Diamond retractable blade 42.
After the rear end of each mounting groove 26 is correspondingly connected insertion, and guide groove 39 with the front side edge of a planar structure 24
End edge edge is penetrating with the inwall front edge of mounting groove 26 and flushes, and can so pass through and telescopic mast 37 is installed at planar structure 24.
The front end outer wall of outer tube 20 in the utility model is provided with external thread structure 29 and is connected with drilling rod front end.Power drives
Dynamic device drives drilling rod and the utility model rotation, and diamond segment 16 carries out bore operation, and diamond fixes the rotation of blade 35
Turn the reaming of first progress certain radius, when diamond segment 16 runs into larger resistance, head back top pressure inner sleeve 19, inner sleeve
Pipe 19 overcomes the elastic force of compression spring 36 to be moved rearwards along the inwall of outer tube 20, because guide groove 39 is also with being moved rearwards, and
And the distance of guide groove 39 and the center line of inner sleeve 19 is gradually reduced by front end to rear end, the position of telescopic mast 37 is in pilot hole 38
Restriction under can only move radially, guide pillar 40 of the driving of guide groove 39 on the telescopic mast 37 in the mounting groove 26 is displaced outwardly,
Telescopic mast 37 is with regard to the protruding segment distance of outer tube one and keeps definite value, and the step that is rotated into of diamond retractable blade 42 is expanded
Hole drilling operation.
After drilling reaches predetermined hole depth, the utility model and drilling rod are dropped back a small distance, inner sleeve 19, telescopic mast 37
Initial position is returned in the presence of compression spring 36, drilling rod and external diameter of the present utility model are significantly less than in drilling
Footpath, thus extract drilling rod and the utility model out without resistance in the least.
The present embodiment not makees any formal limitation, every foundation to shape of the present utility model, material, structure etc.
Any simple modification, equivalent change and modification that the technical essence of the utility model is made to above example, belongs to this reality
With the protection domain of new technique scheme.
Claims (2)
1. the expansive bit for coal bed drilling, it is characterised in that：Including the head with central passage and bar portion, before head
End is fixedly installed diamond segment, and head front end offers mud hole connect with central passage, bar portion include inner sleeve with
Outer tube of the coaxial package outside inner sleeve, inner sleeve pipe outer wall are followed successively by the first cylindrical section, flat part and the second circle from the front to the back
Shell of column, flat part include centrosymmetric two planar structures and two globoidal structures, and planar structure and globoidal structure are circumferentially
Direction is arranged alternately, and the external diameter of globoidal structure is equal with the external diameter of the second cylindrical section, and the external diameter of the second cylindrical section is more than the first circle
The external diameter of shell of column, the second cylindrical section back-end central symmetrically offer two mounting grooves, and the rear end of each mounting groove corresponds to and one
The front side edge linking insertion of planar structure；Second cylindrical section outer wall is provided with external splines structure, and the second cylindrical section front inner wall is set
Female thread structure is equipped with, the rear end on head is stretched into and is threaded in female thread structure；
Outer tube front end outer wall is provided with external thread structure, and outer sleeve inner wall is followed successively by the first cylindrical hole, the second circle from the front to the back
Post holes and internal spline structure, the external diameter of the first cylindrical section is equal with the internal diameter of the first cylindrical hole, the external diameter of the second cylindrical section and
The internal diameter of two cylindrical holes is equal, and ring-shaped step structure is formed between the front end of the rear end of the second cylindrical hole and the first cylindrical hole, the
One cylindrical section rear portion is plugged in the first cylindrical hole, external splines structure and internal spline structure engagement assembling, outer tube nose threads
Stop nut is connected with, the inwall of stop nut is provided with the sealing ring for sealing and being slidably matched with the second cylindrical section, spacing spiral shell
Female front end face is provided with diamond and fixes blade；
The reducing bearizing mechanism that operation end extends radially out outer tube is provided between outer tube and inner sleeve.
2. the expansive bit according to claim 1 for coal bed drilling, it is characterised in that：Reducing bearizing mechanism includes
Compression spring, two telescopic masts and two pilot holes, compression spring are sleeved on outside the first cylindrical section, and the front end of compression spring is with after
End coordinates with flat part rear end face and ring-shaped step structure top pressure respectively, it is assumed that is pointed to along the radial direction of inner sleeve in inner sleeve
The direction of the heart is the direction of ecto-entad, and pilot hole is opened on outer tube and corresponding with inside and outside mounting groove, and the second cylindrical section exists
The left side and right side of mounting groove are symmetrically arranged with guide groove, and the distance of guide groove and inner sleeve center line is gradual to rear end by front end
Reduce, the inner left side of telescopic mast and right side are respectively arranged with the guide pillar being assemblied in guide groove, and telescopic mast radially passes through
The cross section of pilot hole, pilot hole and telescopic mast is rectangular configuration, and telescopic mast outer end sidepiece is provided with insert groove, at insert groove
It is provided with the diamond retractable blade with telescopic mast welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720324994.1U CN206693920U (en) | 2017-03-30 | 2017-03-30 | Expansive bit for coal bed drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720324994.1U CN206693920U (en) | 2017-03-30 | 2017-03-30 | Expansive bit for coal bed drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206693920U true CN206693920U (en) | 2017-12-01 |
Family
ID=60441185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720324994.1U Expired - Fee Related CN206693920U (en) | 2017-03-30 | 2017-03-30 | Expansive bit for coal bed drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206693920U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108505934A (en) * | 2018-03-12 | 2018-09-07 | 中国科学院武汉岩土力学研究所 | A kind of high-precision pore-forming guard aperture cleaning bottom of hole integration drilling apparatus |
| CN108590742A (en) * | 2018-05-10 | 2018-09-28 | 西安科技大学 | Reducing reaming improves the mine gas extraction system and method for gas extraction concentration |
| CN109249542A (en) * | 2018-10-31 | 2019-01-22 | 重庆市瑞轩豪邦新型建材有限公司 | Air entrained concrete production equipment |
| CN109849194A (en) * | 2019-03-20 | 2019-06-07 | 中国恩菲工程技术有限公司 | Lateral groove cutting tool in hole |
| CN110714720A (en) * | 2019-11-04 | 2020-01-21 | 重庆地质矿产研究院 | Drilling device for shale gas exploitation survey |
| CN112647843A (en) * | 2020-12-24 | 2021-04-13 | 重庆北永建设工程有限公司 | Drilling equipment for civil air defense engineering construction |
| CN112895161A (en) * | 2021-01-18 | 2021-06-04 | 邹华智 | Special puncher of building engineering |
| CN114183075A (en) * | 2021-12-06 | 2022-03-15 | 中国矿业大学(北京) | Underground drilling-expanding-protecting integrated construction device and method |
| CN114800885A (en) * | 2022-04-08 | 2022-07-29 | 咸宁南玻节能玻璃有限公司 | Glass drilling cutter |
-
2017
- 2017-03-30 CN CN201720324994.1U patent/CN206693920U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108505934A (en) * | 2018-03-12 | 2018-09-07 | 中国科学院武汉岩土力学研究所 | A kind of high-precision pore-forming guard aperture cleaning bottom of hole integration drilling apparatus |
| CN108505934B (en) * | 2018-03-12 | 2019-03-08 | 中国科学院武汉岩土力学研究所 | A kind of high-precision pore-forming guard aperture cleaning bottom of hole integration drilling apparatus |
| CN108590742A (en) * | 2018-05-10 | 2018-09-28 | 西安科技大学 | Reducing reaming improves the mine gas extraction system and method for gas extraction concentration |
| CN108590742B (en) * | 2018-05-10 | 2019-02-26 | 西安科技大学 | The mine gas extraction system and method for variable diameter reaming raising gas extraction concentration |
| CN109249542A (en) * | 2018-10-31 | 2019-01-22 | 重庆市瑞轩豪邦新型建材有限公司 | Air entrained concrete production equipment |
| CN109849194A (en) * | 2019-03-20 | 2019-06-07 | 中国恩菲工程技术有限公司 | Lateral groove cutting tool in hole |
| CN110714720A (en) * | 2019-11-04 | 2020-01-21 | 重庆地质矿产研究院 | Drilling device for shale gas exploitation survey |
| CN110714720B (en) * | 2019-11-04 | 2020-11-24 | 重庆地质矿产研究院 | Drilling device for shale gas exploitation survey |
| CN112647843A (en) * | 2020-12-24 | 2021-04-13 | 重庆北永建设工程有限公司 | Drilling equipment for civil air defense engineering construction |
| CN112895161A (en) * | 2021-01-18 | 2021-06-04 | 邹华智 | Special puncher of building engineering |
| CN114183075A (en) * | 2021-12-06 | 2022-03-15 | 中国矿业大学(北京) | Underground drilling-expanding-protecting integrated construction device and method |
| CN114800885A (en) * | 2022-04-08 | 2022-07-29 | 咸宁南玻节能玻璃有限公司 | Glass drilling cutter |
| CN114800885B (en) * | 2022-04-08 | 2023-10-24 | 咸宁南玻节能玻璃有限公司 | Glass drilling tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171201 Termination date: 20180330 |