CN203640615U - Balling-resistant PDC drill provided with penetrating pits in flow passage surface - Google Patents
Balling-resistant PDC drill provided with penetrating pits in flow passage surface Download PDFInfo
- Publication number
- CN203640615U CN203640615U CN201320738498.2U CN201320738498U CN203640615U CN 203640615 U CN203640615 U CN 203640615U CN 201320738498 U CN201320738498 U CN 201320738498U CN 203640615 U CN203640615 U CN 203640615U
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- Prior art keywords
- pit
- drill bit
- flow path
- flow passage
- path groove
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- Expired - Lifetime
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- 230000000149 penetrating effect Effects 0.000 title abstract 3
- 238000005553 drilling Methods 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 210000002445 nipple Anatomy 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 16
- 101150054854 POU1F1 gene Proteins 0.000 description 9
- 230000001050 lubricating effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 241001465754 Metazoa Species 0.000 description 5
- 230000005012 migration Effects 0.000 description 5
- 238000013508 migration Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000036346 tooth eruption Effects 0.000 description 2
- 241000254173 Coleoptera Species 0.000 description 1
- 241000241125 Gryllotalpa gryllotalpa Species 0.000 description 1
- 241000283966 Pholidota <mammal> Species 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model discloses a balling-resistant PDC drill provided with penetrating pits in the flow passage surface. The balling-resistant PDC drill comprises a drill body, wherein a screwed joint connected with a drill rod is arranged at the lower part of the drill body; a plurality of blade wings are arranged at the upper part of the drill body; a flow passage groove in the drill is formed by the notches among the blade wings; the whole or part of the surface of the flow passage groove is provided with communicating pits. Compared with the conventional PDC drills, the balling-resistant PDC drill provided with the penetrating pits in the flow passage surface can obviously reduce adhesion of debris on the flow passage groove, and can prevent flow passage blockage, so as to achieve the purpose of balling resistance, increase drilling efficiency of the drill, and reduce drilling cost.
Description
Technical field
The utility model belongs to the drilling equipment technical fields such as petroleum gas, mine engineering, building foundation engineering construction, geology, the hydrology, particularly relates to a kind of water passage surface and has the anti-mud drum PDC drill bit that connects pit.
Background technology
PDC drill bit is that to utilize composite polycrystal-diamond (be PDC tooth to one, also be called for short cutting teeth or tooth) scraping of rock cut or the drill bit of the broken rock of shear action, be one of main rock crushing tool using in drilling engineering now, particularly make with the most use at the middle PDC drill bit of creeping into of middle soft formation.For the cutting structure and the hydraulic structure that make drill bit reach better working effect, in the time of design, manufacture drill bit, conventionally according to certain rule, PDC tooth is divided into some groups, PDC tooth is on the same group cemented on same toothholder, each toothholder and the PDC tooth distributing thereon form a cutting structure unit, are called wing (toothholder is wing body).Groove between wing has just formed the flow path groove of drill bit.Flow path groove is to be mainly convenient to drilling fluid cutting carring discharge from shaft bottom.
PDC drill bit is comparatively fast creeping into or when fast drilling, and particularly, in the time running into the staggered stratum of the stratum of soft mudstone stratum, easily imbibition or soft or hard, landwaste amount is larger, and landwaste easily adheres to and be flocked on gradually the water passage surface of drill bit, blocks runner, forms mud drum.Bit balling can make the brill rock ability of drill bit significantly decline, and makes cutting teeth be difficult to effective cooling, and the rate of wear aggravation of tooth, causes drilling speed to reduce, and drilling life of bit shortens.When mud drum is serious, drill bit, substantially without drilling ability, cannot form obvious drilling depth, the more bit change that now needs to make a trip, and this will obviously reduce drilling efficiency, increase drilling cost.
Utility model content
The purpose of this utility model overcomes above-mentioned the deficiencies in the prior art part exactly, provides a kind of water passage surface to have the anti-mud drum PDC drill bit that connects pit, has solved the anti-mud drum problem of PDC drill bit, thereby improves drilling efficiency, reduces drilling cost.
The purpose of this utility model realizes by following technical proposals:
A kind of water passage surface has the anti-mud drum PDC drill bit that connects pit, comprise drill body, this drill body bottom is provided with the nipple that connects drilling rod, top is provided with some wings, groove between wing forms the flow path groove of drill bit, and all or part of surface of flow path groove is provided with the pit of mutual perforation.
As preferably, the pass connecting between the width W of through slot and the length L of pit of pit is W≤L/2, W >=0.5mm.
The length of pit refers to the maximum transverse size of pit, i.e. the near coal-mine maximum span size on flow path groove surface of pit.In the time that pit is circle, circular diameter is the length of pit.
As preferably, the flow path groove surface of wing leading flank is provided with the pit of mutual perforation.
As preferably, the bottom surface of flow path groove is provided with the pit of mutual perforation.
As preferably, the flow path groove surface of wing trailing flank is provided with the pit of mutual perforation.
As preferably, described pit is circular pit.
Thinking of the present utility model derives from the body surface that falls impedance adhesion of living in soil or inhabiting the animal in hole in the ground.In order to reduce the adhesion of earth, the body surface of some animal presents the surface characteristics of geometric non-smooth from macroscopic view, as the non-smooth surface of the animals such as dung beetle, mole cricket, pangolin.These animals have and fall the body surface that impedance adheres in glutinous wet soil earth, and its body surface presents typical non-smooth features, these animal body surfaces to fall impedance adhesiving effect very obvious.
When drill bit creeps into, drilling fluid fluid cutting carring is from the migration of flow path groove surface, landwaste and flow path groove Surface Contact.If flow path groove surface is smooth surface, when landwaste amount is larger, migration task amount is large, and landwaste is easy to stick to flow path groove surface, forms landwaste group, makes runner not smooth, and landwaste migration difficulty, even stops up runner, forms mud drum.
The flow path groove surface of the utility model drill bit is provided with the pit of mutual perforation, and this surface texture can produce the effect that anti-landwaste adheres to, and its reason is:
1. the perforation pit on flow path groove surface can reduce the area that landwaste contacts with flow path groove, thereby reduces the adhesion of landwaste on flow path groove surface.
2. in the pit of perforation pit and through slot, can store lubricating fluid (drilling fluid), it can be to the landwaste lubricate flowing through from flow path groove surface, and adhesion and the frictional force on landwaste and flow path groove surface are declined greatly.
3. between pit of the present utility model, mutually connect by through slot, store lubricating fluid (drilling fluid) in pit and through slot, pit is interconnected.When landwaste (group) process pit, if there is relatively large landwaste (group) to enter pit, extrude the lubricating fluid in pit simultaneously, if can not mutually connect without through slot between pit, pit will produce suction-operated to the landwaste in the phase, produces negative pressure benefit, and inconvenient landwaste departs from, its will be in pit residual buildup, be unfavorable for the unimpeded of flow path groove; Between pit, mutually connect by through slot, the lubricating fluid (drilling fluid) between the pit on flow path groove surface is interconnected, and it will can not produce suction-operated to the larger landwaste that enters pit, and landwaste is difficult for residual buildup.Therefore the related perforation pit of the utility model be conducive to landwaste migration flow, prevent the accumulation of landwaste.
4. between pit of the present utility model, mutually connect by through slot, lubricating fluid can flow freely between each pit, makes it have stable lubricating fluid compensation ability, has guaranteed the effect of reducing adhesion resistance.
5. between pit of the present utility model, mutually connect by through slot, form netted pit group on flow path groove surface, under the drive of dynamic drilling fluid fluid, between pit and pit, will form dynamically lubricating effect, be conducive to wash away landwaste, landwaste is difficult to be detained and pile up.
Therefore, the utility model can obviously reduce or prevent that landwaste is in the adhering to, pile up of flow path groove surface, and prevents that runner from stopping up and bit balling, thereby improves the drilling efficiency of drill bit, reduces drilling cost.
Compared with prior art, the beneficial effects of the utility model are: this water passage surface has the anti-mud drum PDC drill bit that connects pit than conventional PDC drill bit, can obviously reduce adhesion and the frictional force of landwaste at flow path groove, be conducive to the migration of landwaste, prevent that runner from stopping up, reach the object of anti-mud drum, thereby improve drill bit drilling efficiency, reduce drilling cost.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structure chart of the pit that mutually connects of the utility model.
The specific embodiment
Below in conjunction with specific embodiments and the drawings, the utility model is further described.
Referring to Fig. 1 and Fig. 2, a kind of water passage surface has the anti-mud drum PDC drill bit that connects pit, comprise drill body 2, these drill body 2 bottoms are provided with the nipple 3 that connects drilling rod, top is provided with some wings 4, groove between wing 4 forms the flow path groove 5 of drill bit, and all surfaces of flow path groove 5 is provided with the pit 1 of mutual perforation.
This PDC drill bit also can only be provided with the pit 1 of mutual perforation at flow path groove 5 part surfaces, be only provided with the pit 1 of mutual perforation on flow path groove 5 surfaces of wing leading flank or be only provided with the pit 1 of mutual perforation in the bottom surface of flow path groove 5 or be only provided with the pit 1 of mutual perforation on flow path groove 5 surfaces of wing trailing flank.
As preferably, the pass connecting between the width W of through slot 11 and the length L of pit 1 of pit 1 is W≤L/2, W >=0.5mm.Through slot 11 mainly plays a part to connect pit, is convenient to the connection of fluid between pit and flows, and the width W of through slot 11 should not be too wide, too wide through slot 11 sizes will approach dimple size, be communicated with effect bad, when it is below the half of the length L of pit 1 time, connect effect better.But its width W also should not be too little, too young pathbreaker can hinder flowing of larger viscosity fluid, and is not easy to processing.
The pit 1 of the present embodiment adopts circular pit, and drill bit processing is more convenient, and anti-mud drum effect is better, also can adopt according to actual conditions the pit of other shapes.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (6)
1. a water passage surface has the anti-mud drum PDC drill bit that connects pit, comprise drill body, this drill body bottom is provided with the nipple that connects drilling rod, top is provided with some wings, groove between wing forms the flow path groove of drill bit, it is characterized in that: all or part of surface of flow path groove is provided with the pit of mutual perforation.
2. water passage surface according to claim 1 has the anti-mud drum PDC drill bit that connects pit, it is characterized in that: the pass between the width W of through slot and the length L of pit of perforation pit is W≤L/2, W >=0.5mm.
3. water passage surface according to claim 1 has the anti-mud drum PDC drill bit that connects pit, it is characterized in that: the flow path groove surface of wing leading flank is provided with the pit of mutual perforation.
4. water passage surface according to claim 1 has the anti-mud drum PDC drill bit that connects pit, it is characterized in that: the bottom surface of flow path groove is provided with the pit of mutual perforation.
5. water passage surface according to claim 1 has the anti-mud drum PDC drill bit that connects pit, it is characterized in that: the flow path groove surface of wing trailing flank is provided with the pit of mutual perforation.
6. there is according to the water passage surface described in claim 1 to 5 any one the anti-mud drum PDC drill bit that connects pit, it is characterized in that: described pit is circular pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320738498.2U CN203640615U (en) | 2013-11-21 | 2013-11-21 | Balling-resistant PDC drill provided with penetrating pits in flow passage surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320738498.2U CN203640615U (en) | 2013-11-21 | 2013-11-21 | Balling-resistant PDC drill provided with penetrating pits in flow passage surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203640615U true CN203640615U (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320738498.2U Expired - Lifetime CN203640615U (en) | 2013-11-21 | 2013-11-21 | Balling-resistant PDC drill provided with penetrating pits in flow passage surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203640615U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603605A (en) * | 2013-11-21 | 2014-02-26 | 西南石油大学 | Balling-resistant PDC (polycrystalline diamond compact) drill bit with communicated pits in surfaces of flow channels |
| CN108240398A (en) * | 2018-03-21 | 2018-07-03 | 济南大学 | A kind of compound Surface Texture friction is secondary |
-
2013
- 2013-11-21 CN CN201320738498.2U patent/CN203640615U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603605A (en) * | 2013-11-21 | 2014-02-26 | 西南石油大学 | Balling-resistant PDC (polycrystalline diamond compact) drill bit with communicated pits in surfaces of flow channels |
| CN103603605B (en) * | 2013-11-21 | 2016-04-20 | 西南石油大学 | Water passage surface has the anti-mud drum PDC drill bit of through pit |
| CN108240398A (en) * | 2018-03-21 | 2018-07-03 | 济南大学 | A kind of compound Surface Texture friction is secondary |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |