CN202431191U - Controllable-flow coal mining drill bit - Google Patents
Controllable-flow coal mining drill bit Download PDFInfo
- Publication number
- CN202431191U CN202431191U CN2011205270935U CN201120527093U CN202431191U CN 202431191 U CN202431191 U CN 202431191U CN 2011205270935 U CN2011205270935 U CN 2011205270935U CN 201120527093 U CN201120527093 U CN 201120527093U CN 202431191 U CN202431191 U CN 202431191U
- Authority
- CN
- China
- Prior art keywords
- coal mining
- drill bit
- wall
- spring seat
- flow
- Prior art date
- 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
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to a controllable-flow coal mining drill bit, which comprises a coal mining drill bit body, an outer pipe and a core taking pipe, wherein the core taking pipe is connected with a snap spring seat; a first conical wall and a second conical wall are arranged in the inner cavity of the coal mining drill bit body; the first conical wall is positioned on the upper side of the second conical wall; a straight wall between the first conical wall and the second conical wall is called connecting straight wall; the second conical wall is connected with the lower outlet of the inner cavity of the coal mining drill bit body; and the diameter of the connecting straight wall is 1.5-2.5 millimeters larger than that of the snap spring seat of the core taking pipe. The controllable-flow coal mining drill bit has a simple structure; and when the snap spring seat is submerged into the lower part of the inner cavity of the coal mining drill bit body, the interval between the bottom end of the snap spring seat and the bottom end of the second conical wall can be adjusted optionally between 2 millimeters and 10 millimeters, the flow of a drilling fluid flowing through the second conical wall can be kept constant, the flow of the drilling fluid which flows through the bottom end of the core taking pipe is kept constant in a coal core exploring process, and the integrity and the yield of a coal core are increased to a large extent.
Description
Technical field
The utility model belongs to the coal core instrument of taking; Be particularly related to a kind of flow-controllable coal mining drill bit; This drill bit is provided with a control gap between drill bit endoporus and corer, the control gap is controlled through the flow of probe tube drilling liquid flow, has improved integrity degree and yield rate that the coal core is taked.
Background technology
The coal bed gas market prospects of China are wide, and resource potential is big.Annual construction producing well and the stratigraphic well of needing is no less than 5000 mouthfuls.Wherein one of key technology of stratigraphic well construction is the taking of quick, safety, capacity of wire line coring drilling technology and coal core; The coal core of asking for will keep the primary structure in coal seam; Guarantee the original rerum natura of rock coal core to greatest extent; Thereby reach accurate chemical examination, analysis, for reservoir parameters such as correct evaluation coal-bed gas content provide reliable foundation to the purpose coal seam; Take the operation of coal core need adopt two-tube single action coring device; The drill bit of promptly forming by outer tube and interior pipe; In drilling through coal core process, outer tube rotates, and interior pipe does not rotate; Drilling fluid is to flow to drill bit through the annular gap between outer tube and interior pipe; Thereby play cools reamer head and carry the effect that drilling cuttings returns ground, for guaranteeing when drilling through the coal seam, to protect the primary structure in coal seam and enough yield rates to greatest extent, the flow of the part drilling fluid between clip spring seat and the drill bit inwall of flowing through must remain in certain scope.Flow is crossed the conference erosion and is fallen the yield rate that part coal core (especially soft coal seam) influences the coal core, even all by erosion.Too small clip spring seat or the drill bit of then can causing of flow lived by the coal seam adhesion, and it is motionless to cause interior pipe to lift, and makes this brill journey get the core failure, thereby influences the workmanship of full well.Therefore the flow of controlling the drilling fluid between clip spring seat and the drill bit internal of flowing through is particularly crucial sport technique segment; And there is the control instability of the flow of drilling fluid in present chisel bit; Sampling quality is not high, the imperfect and not high phenomenon of yield rate of coal core that occurs taking through regular meeting.
Summary of the invention
The purpose of the utility model is to propose a kind of flow-controllable coal mining drill bit, and this drill bit improves on the fit structure of drill bit inwall and corer, can control through the flow of probe tube drilling liquid flow, has improved quality and quantity that the coal core is taked.
To achieve these goals, the technical scheme of the utility model is: a kind of flow-controllable coal mining drill bit comprises coal mining bit body, outer tube and corer; The coal mining bit body has the inner chamber of a up/down perforation, is evenly distributed with a plurality of water holes on the internal chamber wall, and the coal mining bit body is fastened on the outer tube; Corer is connected with clip spring seat; Be provided with jump ring in the clip spring seat, said corer inserts the bottom that the clip spring seat that connects until corer sinks to coal mining bit body inner chamber from the pore of outer tube, in the inner chamber of coal mining bit body, is respectively arranged with two sections conical inboard walls up and down; Be respectively first tapered wall and second tapered wall; First tapered wall is at the upside of second tapered wall, and the first tapered wall diameter is greater than the second tapered wall diameter, is that straight wall is called and is connected straight wall between first tapered wall and second tapered wall; Second tapered wall connects the lower part outlet of Coal drill bit intracoelomic cavity, and the diameter of the straight wall of said connection is greater than clip spring seat diameter 1.5mm to 2.5mm.
The height of the straight wall of said connection is 8mm to 10mm.
The aperture of the straight wall of said connection is greater than clip spring seat diameter 2mm.
Said water hole quantity is 6 to 8, and 6 to 8 water holes are evenly distributed on first tapered wall of bit body inner chamber.
The beneficial effect of the utility model is: simple in structure; The trapezium structure of coal mining bit body endoporus and with the clearance control of clip spring seat; When clip spring seat being sunk to the bottom of coal mining bit body endoporus; The gap of the clip spring seat bottom and the second tapered wall bottom can be regulated arbitrarily between 2mm to 10mm; Mud flow rate invariable of second tapered wall that still guarantee to flow through, thus guaranteed to take in the coal core process drilling liquid flow constant through the constant flow of corer bottom, and greatly degree has improved the integrity degree and the yield rate of coal core.
Below in conjunction with accompanying drawing and embodiment the utility model is made a detailed description.
Description of drawings
Fig. 1 the utility model structural representation;
Fig. 2 is the A portion enlarged drawing of Fig. 1.
The specific embodiment
A kind of flow-controllable coal mining drill bit embodiment, referring to Fig. 1 and Fig. 2, said drill bit comprises coal mining bit body 1, outer tube 2 and corer 3; The coal mining bit body has the inner chamber 1-1 of a up/down perforation, is evenly distributed with a plurality of water hole 1-2 on the internal chamber wall, normally 6 to 8 in equally distributed water hole; The coal mining bit body is fastened on the outer tube, and corer is connected with clip spring seat 4, is provided with jump ring 5 in the clip spring seat; Said corer inserts the bottom that the clip spring seat that connects until corer sinks to coal mining bit body inner chamber from the pore of outer tube, wherein, is respectively arranged with two sections conical inboard walls up and down at the inner chamber of coal mining bit body; Be respectively the first tapered wall 1-3 and the second tapered wall 1-4; First tapered wall is at the upside of second tapered wall, and first tapered wall is greater than second tapered wall, is that straight wall is called and is connected straight wall 1-5 between first tapered wall and second tapered wall; Second tapered wall connects the lower part outlet 1-6 of Coal drill bit intracoelomic cavity; The diameter of the straight wall of said connection is greater than clip spring seat diameter 1.5mm to 2.5mm, and its best is to connect the diameter of straight wall greater than clip spring seat diameter 2mm, and said a plurality of water hole is evenly distributed on first tapered wall of bit body inner chamber.
The direction of arrow among Fig. 1 is the flow direction of drilling fluid, and for difficult be provided with too high of the height of the straight wall of the said connection of the obstruction that prevents drilling fluid, it highly is 8mm to 10mm usually, and best height is 8mm.
In the actual work; Twist this bit body earlier and be connected on the outer tube lower end, behind the outer tube G.I.H, the beginning stacks bores down; When drill bit during near the shaft bottom; On ground with winch connecting the corer assembly G.I.H of clip spring seat and jump ring, the degree of depth that is lowered to is that the clip spring seat until corer gets into controllable flow amount coal mining drill bit inner chamber, the gap of clip spring seat bottom and the drill bit second tapered wall bottom 1-7 is that gap when debugging on ground matches at this moment; Because human factor may have error; But because the design of the internal construction of this drill bit, flow through when the creeping into flow constant magnitude of the drilling fluid between clip spring seat and the drill bit internal that having guaranteed mines is constant, thereby has guaranteed the integrity degree and the yield rate of coal core; Use this flow-controllable coal mining drill bit and accomplished a large amount of coal bed gas parameters well drilling engineerings, coal core integrity degree and yield rate all reach quality requirement.
Claims (4)
1. flow-controllable coal mining drill bit comprises coal mining bit body, outer tube and corer, and the coal mining bit body has the inner chamber of a up/down perforation; Be evenly distributed with a plurality of water holes on the internal chamber wall, the coal mining bit body is fastened on the outer tube, and corer is connected with clip spring seat; Be provided with jump ring in the clip spring seat; Said corer inserts the bottom that the clip spring seat that connects until corer sinks to coal mining bit body inner chamber from the pore of outer tube, it is characterized in that, in the inner chamber of coal mining bit body, is respectively arranged with two sections conical inboard walls up and down; Be respectively first tapered wall and second tapered wall; First tapered wall is at the upside of second tapered wall, and the first tapered wall diameter is greater than the second tapered wall diameter, is that straight wall is called and is connected straight wall between first tapered wall and second tapered wall; Second tapered wall connects the lower part outlet of coal mining bit body inner chamber, and the diameter of the straight wall of said connection is greater than clip spring seat diameter 1.5mm to 2.5mm.
2. flow-controllable coal mining drill bit according to claim 1 is characterized in that the height of the straight wall of said connection is 8mm to 10mm.
3. flow-controllable coal mining drill bit according to claim 1 is characterized in that the aperture of the straight wall of said connection is greater than clip spring seat diameter 2mm.
4. flow-controllable coal mining drill bit according to claim 1 is characterized in that, said water hole quantity is 6 to 8, and 6 to 8 water holes are evenly distributed on first tapered wall of bit body inner chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205270935U CN202431191U (en) | 2011-12-16 | 2011-12-16 | Controllable-flow coal mining drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205270935U CN202431191U (en) | 2011-12-16 | 2011-12-16 | Controllable-flow coal mining drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202431191U true CN202431191U (en) | 2012-09-12 |
Family
ID=46780651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205270935U Expired - Fee Related CN202431191U (en) | 2011-12-16 | 2011-12-16 | Controllable-flow coal mining drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202431191U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118082A (en) * | 2019-06-06 | 2019-08-13 | 张�杰 | A kind of geothermal measurement device used for geological prospecting |
-
2011
- 2011-12-16 CN CN2011205270935U patent/CN202431191U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118082A (en) * | 2019-06-06 | 2019-08-13 | 张�杰 | A kind of geothermal measurement device used for geological prospecting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203499568U (en) | Split PDC (polycrystalline diamond compact) guide chambering drilling bit | |
| CN202249869U (en) | Two-stage single-moving coupling-pipe drilling tool | |
| CN208734301U (en) | A kind of water isolation type single-action twin-pipes core drill | |
| CN105317377A (en) | Center differential pressure type drill bit | |
| CN202431191U (en) | Controllable-flow coal mining drill bit | |
| CN206681678U (en) | A kind of screw type bit for ground exploration | |
| CN207728393U (en) | The casing programme of chamber is made for salt hole air reserved storeroom | |
| CN204476325U (en) | Three repetitive soft rock core drills | |
| CN112112575B (en) | Garrulous soft coal seam airtight coring bit suitable for ground drilling | |
| CN206668198U (en) | The geological prospecting double-layer drill rod cored for negative pressure | |
| CN105156054A (en) | Local reverse circulation coring drill tool for loose and broken strata | |
| CN102155176A (en) | Waterproof rock soil core drilling tool | |
| CN204476326U (en) | A kind of three repetitive soft rock core drills | |
| CN208502674U (en) | A kind of two-way injection core bit of reduction chip hold down effect | |
| CN204040966U (en) | A kind of drilling sampling device | |
| CN203296696U (en) | Drilling coring tool for ooze stratum | |
| CN202055767U (en) | Drilling tool for drill hole sampling at complex stratum | |
| CN206668159U (en) | The geological prospecting single rotary double core barrel cored for negative pressure | |
| CN205558847U (en) | Deep -sea sediment wire line coring three -layer pipe bit utensil suitable for seabed rig | |
| CN210685865U (en) | Drill bit for acquiring rock debris at bottom of well while drilling | |
| CN202348157U (en) | Eccentric guiding shoe for casing | |
| CN203130003U (en) | Differential type air drilling coring device | |
| CN203769669U (en) | Surge pressure control nipple | |
| CN203097725U (en) | Three-cutter-wing large opening reverse circulation drill | |
| CN105221080A (en) | Solution cavity protector and adopt the navigation channel drilling on waterways method of this protector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100073 No. 15, South Street, west bureau, Beijing, Fengtai District Patentee after: Beijing geotechnical geological exploration Co., Ltd. Address before: 100073 No. 15, South Street, west bureau, Beijing, Fengtai District Patentee before: BEIJING DADI GAOKE CBM ENGINEERING TECHNOLOGY RESEARCH INSTITUTE |
|
| 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: 20120912 Termination date: 20201216 |