CN101258301A - One-piece drill bit for single-pass anchor bolting and single pass drilling apparatus - Google Patents
One-piece drill bit for single-pass anchor bolting and single pass drilling apparatus Download PDFInfo
- Publication number
- CN101258301A CN101258301A CNA200680032311XA CN200680032311A CN101258301A CN 101258301 A CN101258301 A CN 101258301A CN A200680032311X A CNA200680032311X A CN A200680032311XA CN 200680032311 A CN200680032311 A CN 200680032311A CN 101258301 A CN101258301 A CN 101258301A
- Authority
- CN
- China
- Prior art keywords
- drill bit
- plant
- processing unit
- rock processing
- reamer
- 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.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 33
- 239000011435 rock Substances 0.000 claims abstract description 43
- 238000012545 processing Methods 0.000 claims description 27
- 239000007787 solid Substances 0.000 claims description 5
- 230000001154 acute effect Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 238000003754 machining Methods 0.000 abstract 5
- 238000004873 anchoring Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009991 scouring Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/36—Percussion drill bits
- E21B10/40—Percussion drill bits with leading portion
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/004—Bolts held in the borehole by friction all along their length, without additional fixing means
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to a drill bit (16) and a single pass drilling apparatus (10). The one-piece drill bit (16) has a connection portion, adapted to be rigidly connected to a drill steel, a pilot part (14) and a reamer part (19). The pilot part has first rock machining means (17). The reamer part has a first center line (CL2) and second rock machining means (18A, 18B, 18C). The second rock machining means is provided axially between said connection portion and said first rock machining means and to one side of the pilot part. The drill bit has a rotational direction (R). A side of the pilot part (14) facing away from the reamer part (19) is provided with a wear resistant means (17'). The wear resistant means 17' is integral with the first rock machining means 17.
Description
Technical field
The present invention relates to a kind of drill bit and one way rig according to the independent claims preamble.
Background technology
The installation that is used for strengthening the crab-bolt (anchor bolt) of excavation realizes in two different steps usually.Usually, the hole is got out and drilling rod (drill steel) and drill bit were extracted out before crab-bolt is inserted in the hole and tightened up or be in the milk.The connection of one way crab-bolt comprises carries out this two steps simultaneously, and drilling rod will be removed the crab-bolt that is excluded with insertion.The benefit of one way anchoring comprises makes bolt that required time minimization is installed, and compares the safety that improves the rig operator with craft or semi-hand anchoring, and has strengthened the prospect of this method full-automation.Another benefit is to compare with craft or semi-hand anchoring, has improved the installation quality and the precision of crab-bolt.The diameter in hole is very crucial to the crab-bolt performance under the situation of friction (for example opening bolt).Another benefit of one way anchoring is that this hole can not cave in when drawing back drill bit, and this is because bolt has suffered in this hole.Because thereby bolt always is mounted and has brought higher efficient; That is, will not have useless hole.
The prior art of being devoted to the one way anchoring substantially innovative crab-bolt as target, the latter is also as drilling rod, is provided with drill bit around in its end.This equipment uses by rotary drilling method or rotation/percussive drilling method, and is not suitable for hard rock sill strip spare usually.Impact crab-bolt at the bottom of the present hard rock and can't utilize drill bit again, thereby face the cost problem.Have multiple roof bolt, and a kind of particular form is tubulose (for example opening bolt, Swellex etc.), has the centre bore that vertically passes bolt.It is complicated and expensive to be suitable for passing the drill bit that housing extracts out.In existing one way crab-bolt, because the exclusiveness of the drill bit drawn back of the employing of special-purpose crab-bolt and arbitrary complexity is used, penetration rate is complicated to the cost competitiveness of drill bit cost.Yet in addition, hole the certainly installation advantage of roof bolt is non-from drilling hole type greater than those.
Goal of the invention
A purpose according to drill bit of the present invention is the relevant issues that overcome above-mentioned prior art substantially, and a kind of alternative scheme perhaps is provided at least.
Another object of the present invention provides a kind of single pass drill bit.
The present invention also has another purpose to provide drill bit and one way rig, and its use cost is lower, thereby makes the use more attractive of one way bolt in mining industry.
The present invention also has another purpose to provide the drill bit with excellent abrasive resistance.
In the whole manual, need unless compose a piece of writing, otherwise word " comprises " or its deformable body will be understood to include described element or element set, but do not get rid of the existence of other element or element set.
Description of drawings
Accompanying drawing has shown the example of the aforementioned type embodiment of the invention.The details of these accompanying drawings and related description can not influence the summary that wide region formerly of the present invention is described.
Figure 1A-1G has schematically shown the order that adopts the one way top board anchoring of carrying out according to drill bit of the present invention.
Fig. 2 A has shown the lateral elevational view according to drill bit of the present invention and bar portion.
Fig. 2 B has shown the front elevation drawing of drill bit.
Fig. 3 A has shown the lateral elevational view of drill bit during the rock-boring.
Fig. 3 B has shown the front elevation drawing of drill bit during the rock-boring.
The specific embodiment
Figure 1A-1G has shown that according to one way rig 10 of the present invention it uses according to drill bit 16 of the present invention, and Fig. 2 A-3B shows in greater detail according to drill bit 16 of the present invention.One way rig 10 comprises several portions: as have with respect to foremost 12 and the drilling rod 11 of the elongation of rearmost end (not shown) of boring direction F.12 have the connecting portion that comprises that screw thread 15, unshowned taper or bayonet socket connect foremost.Solid drill 16 has rock processing unit (plant) 17 and 18A, 18B, 18C.Drill bit 16 can be connected with drilling rod by comprising screw thread is connected (not shown) with taper or bayonet socket connecting portion 20.Drilling rod 11 and drill bit constitute drilling equipment.One way rig 10 also comprises the crab-bolt 21 that is suitable for surrounding to small part drilling rod 11.Crab-bolt 21 has openend.The maximum radial dimension of drill bit is less than the minimum diameter of crab-bolt 21.
The basic thought of one way rig 10 is boring when crab-bolt is surrounded drilling rod, and extracts drill bit out subsequently so that reuse.There is not the loss of drill bit assembly.One way rig 10 is able to open in more detail in Swedish patent application No.0400597-1, and the disclosure is combined in herein by reference.
One-piece rock drill 16 comprises main body 25 and carbide alloy device, i.e. chisel and/or ball tooth 17,18A, 18B, 18C.The main body of drill bit is formed from steel.Main body 25 comprises substantial cylindrical guide part 14 and conical shaped reamer 19.Guide part 14 can be cone shape and reamer 19 can be cylindrical shape.Guide part has and is carrying radially the chisel 17 that extends or two or more radially front surface of the front button of alignment roughly.Reamer 19 has circular radial section.Reamer has the front surface of the one or more front button of carrying; Among the present invention three front button 18A, 18B, 18C.Front surface can be convex surface or general plane.Ball tooth 18A, 18B and 18C can form peripheral arch on reamer.Ball tooth 18A, 18B, 18C can be slightly to peripheral outer the giving prominence to of reamer, during holing, to process the diameter hole 22 bigger than steel main body 25.The number of hard alloy spherical-teeth changes according to the size of bit diameter on the reamer.Chip area or groove can be arranged in the zone between the adjacent reamer buttons, and scouring media can be by passing through here.Rock drill bit 16 is connected to drilling rod 11 by connecting portion, thereby transmits rotational motion and bump in common mode.Drilling rod 11 comprises the conduit of carrying scouring media.The main channel that is used for scouring media is arranged on drill bit internal.This main channel is communicated with a plurality of branch channels foremost at it, and this branch channels outlet is at front surface.In the scouring media reality water, cement or air.The pilot hole 22A that guide part gets out has less diameter and length with respect to hole 22.The length L of guide part 14 is restricted to: on the direction that is parallel to reamer centre line C L 2, and the foremost portion of guide part and top reamer buttons 18A, the distance between 18B or the 18C.Length L is at least 10mm and can not surpasses 60mm, to offer good guiding of drill bit and good application life.Reamer buttons among this embodiment comprises forecourt tooth 18A, intermediate tooth 18B and last ball tooth 18C.During holing, be added in maximum reaction force on the reamer 19 be applied to the most preceding and intermediate rock processing unit (plant) 18A and 18B on.Therefore, the axial plane that passes chisel 17 is an angulation, so that it passes through between the most preceding and intermediate rock processing unit (plant) 18A and 18B.Express in another way and be exactly, first angle beta of the normal N formation acute angle of imaginary line S and centre line C L 2, this imaginary line S preferably pass rock processing unit (plant) or chisel 17 and perpendicular to the medium line of the centre line C L 2 of reamer 19.Normal N and rock processing unit (plant) or ball tooth 18A intersect, before this rock processing unit (plant) or ball tooth 18A are positioned on the direction of rotation R of drill bit 16.Angle beta preferably is not less than 0 ° and be not more than 20 °.If the most preceding rock processing unit (plant) in the reamer 19 is the ball tooth, normal N and its center line intersect so.If the most preceding rock processing unit (plant) in the reamer 19 has other shape, the most preceding point of normal N and its direction of rotation R intersects so.During holing, be added in maximum reaction force on the reamer 19 be applied to the most preceding and intermediate tooth 18A and 18B on.Rock processing unit (plant) 17 extends at least in addition and reaches enveloping surface 50.Therefore, by with rock processing unit (plant) 17 with certain relation with respect to forecourt tooth 18A location, then the enveloping surface 50 of guide part rock processing unit (plant) 17 can form wear-resistant device 17 ' on the easiest position that is worn of reamer during holing.Described wear-resistant device 17 ' forms with the first rock processing unit (plant) is whole thus.Contact with enveloping surface 50 or drill margin 51 and be parallel to the tangent line T of centre line C L 2 and the edge of guide part forms radial distance X foremost at it.Distance X is non-vanishing and preferably be not less than-5mm and preferably being not more than+5mm.
Described shape provides between good boring effect and pilot hole 22A and the guide part 14 better contact surface.By making guide part towards reamer some angles that tilt, can obtain better boring effect, this is because drilling rod is always crooked in the same direction during holing, and the bending of drilling rod 11 is owing to the contact of 51 lower axial end 52 places is restricted at the edge, and described edge 51 is under the ball tooth 18A-18C in the axial direction.Thereby the lower end at edge 52 can be harder or be equipped with hard blade to reduce wearing and tearing than the base (rest) of steel main body 25 by surfacing, and described lower end 52 can contact with rock.
Figure 1A-1G has shown the operation of one way Rock anchor equipment 10.Example among Fig. 3 A and the 3B corresponding diagram 1C.The angle of bend of drilling rod 11 is exaggerated in Fig. 3 A.Drill bit 16 is for example by being threaded onto on the drilling rod 11.For example the boring machine of standard drill platform keeps drilling rod.Bolt 21 is preferably around drilling rod feeding automatically and be positioned on boring direction F after the drill bit 16.Among Figure 1A, guide part 14 is pressing rock basically, thereby in the near future, during annular interpolation, guide part 14 will be processed rock surface.Guide part 14 can find its definite center and beginning in centre-drilling hole subsequently, and this moment, drilling rod 11 side by side began swing (Figure 1B) around guide part center line CL1.Reamer 19 contacts with rock surface and begins reaming subsequently, and this hole is formed by guide part 14.In the near future, bolt 21 reaches this hole and it is pressed into this hole, shown in Fig. 1 C.Bolt 21 is separated with drill bit 16 usually in the axial direction.The diameter of bolt 21 is preferably less than the diameter in hole 22.Drill bit 16 can continue boring and reamings 22, and the holed branch sleeve 26 of machine of bolt promotes forward simultaneously, referring to Fig. 1 D, is stopped up to the feeding of different piece.The degree of depth in hole 22 is determined by the length of bolt 21 that basically promptly, when the packing ring 23 that is positioned at the bolt rearmost end arrived the rock surface in hole or enters the mouth, further the feeding meeting stopped, referring to Fig. 1 E.In the boring machine, be provided with the crab-bolt impeller.The crab-bolt impeller is branch sleeve 26 or disc (dolly) instrument, and it is driven by drilling rod.The disc instrument during inserting usually and drilling rod and bolt together rotate.But for example be under the situation of mechanical anchor, for example bolt can be held it is not rotated during inserting.The disc instrument can reverse crab-bolt after inserting fully.The disc instrument can also slide along drilling rod, with allow machinery come off bolt and grouting bolt more easily install.Fig. 1 E has shown that crab-bolt 21 fully inserts, and this moment, drilling rod and drill bit also were in the crab-bolt.Impeller is shifted plate body onto rock surface.Packing ring can be the unfixed conventional plate body with centre bore, projection 24 actings in conjunction of itself and bolt rearmost end.Drill bit is extracted out from pilot hole 22A subsequently, referring to Fig. 1 F.Preferably, the axial distance between bolt and the drill bit is greater than the degree of depth of pilot hole 22A, thereby makes can not forming with the extraction of drill bit foremost of bolt interfere.The drilling operation of repetition can be extracted and can be used for once more to drill bit and drilling rod fully out.
The machine of driving arrangement 10 can be top hammer auger, pure rotary machine or a down-the-hole equipment.
Drill bit according to the present invention provides excellent abrasive resistance and gratifying boring effect, and good abrasion resistance is because in the face of being received by wear-resistant rock processing unit (plant) 17 ' away from the wearing and tearing on the side of reamer.
The present invention described herein is variation, modification and/or the interpolation except that those are clearly described easily, and is understandable that, the present invention includes all these and falls into variation, modification and/or interpolation within the claim scope.
Claims (10)
1. one kind is designed for the solid drill that the one way crab-bolt connects, described drill bit (16) has the connecting portion that is suitable for being connected to rigidly on the drilling rod, guide part (14) and reamer (19), described guide part has the first rock processing unit (plant) (17), described reamer has first center line (CL2) and the second rock processing unit (plant) (18A, 18B, 18C), the described second rock processing unit (plant) axially is arranged between described connecting portion and the described first rock processing unit (plant) and is in a side of described guide part, described drill bit has direction of rotation (R), it is characterized in that, side towards away from described reamer (19) of described guide part (14) is provided with wear-resistant device (17 '), and described wear-resistant device (17 ') becomes an integral body with the described first rock processing unit (plant) (17).
2. drill bit as claimed in claim 1, wherein extend through the described first rock processing unit (plant) (17) and form first angle (β) of acute angle perpendicular to the imaginary line (S) of described first center line (CL2) of described reamer (19) and the normal (N) of described first center line, and wherein said normal (N) and rock processing unit (plant) (18A) intersect, before this rock processing unit (plant) (18A) is positioned on the described direction of rotation (R) of described drill bit (16).
3. drill bit as claimed in claim 2, wherein said first angle (β) are not less than 0 ° and be not more than 20 °.
4. as claim 2 or 3 described drill bits, the described the most preceding rock processing unit (plant) (18A) in the wherein said reamer (19) is the ball tooth, and wherein said normal (N) is crossing with the center line of the most preceding described rock processing unit (plant) (18A).
5. as claim 2 or 3 described drill bits, wherein said normal (N) intersects with the most preceding point of the most preceding described rock processing unit (plant) on described direction of rotation (R).
6. as claim 2 or 3 described drill bits, the wherein said first rock processing unit (plant) is chisel (17), and the described second rock processing unit (plant) at least three ball teeth (18A, 18B, 18C).
7. as the described drill bit of the arbitrary claim in front, the center line (CL1) of wherein said guide part (14) and axis (CL3) form second angle (α) of acute angle, and described axis (CL3) extends abreast with described first center line (CL2).
8. drill bit as claimed in claim 7, wherein said second angle (α) is-20 ° to+20 °, does not comprise 0 °.
9. as the described drill bit of the arbitrary claim in front, the length (L) of wherein said guide part (14) is defined as: on the direction that is parallel to described first center line (CL2), the foremost portion of described guide part and the second the most preceding rock processing unit (plant) (18A, 18B or 18C) between distance, and wherein said length (L) is at least 10mm and is not more than 60mm.
10. an one way rig comprises drilling equipment and crab-bolt (21), it is characterized in that, this equipment comprises the solid drill (16) defined in the claim 1-9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0501979A SE530651C2 (en) | 2005-09-05 | 2005-09-05 | Drill bit for one-stage anchor bolts and one-stage drilling equipment |
| SE05019799 | 2005-09-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101258301A true CN101258301A (en) | 2008-09-03 |
Family
ID=37836097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200680032311XA Pending CN101258301A (en) | 2005-09-05 | 2006-06-26 | One-piece drill bit for single-pass anchor bolting and single pass drilling apparatus |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US20090285638A1 (en) |
| EP (1) | EP1926882A1 (en) |
| JP (1) | JP2009507154A (en) |
| KR (1) | KR20080052575A (en) |
| CN (1) | CN101258301A (en) |
| AU (1) | AU2006287962A1 (en) |
| CA (1) | CA2620473A1 (en) |
| RU (1) | RU2008113203A (en) |
| SE (1) | SE530651C2 (en) |
| WO (1) | WO2007030047A1 (en) |
| ZA (1) | ZA200801476B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452475A (en) * | 2013-09-17 | 2013-12-18 | 中煤科工集团西安研究院有限公司 | Hole forming method for underground soft fractured formation casting protection holes of coal mine |
| CN106574486A (en) * | 2014-07-24 | 2017-04-19 | 高级技术有限责任公司 | Devices and systems for extracting drilling equipment through a drillstring |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011120572A1 (en) * | 2011-01-27 | 2012-08-02 | Minova International Ltd. | Drilling device for impact or rotary impact drilling with connecting sleeve |
| US9016402B2 (en) * | 2011-09-08 | 2015-04-28 | Garry Thorne | Geological drill |
| US9194187B2 (en) | 2013-03-15 | 2015-11-24 | Dover Bmcs Acquisition Corporation | Rotational drill bits and drilling apparatuses including the same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4328002Y1 (en) * | 1965-07-12 | 1968-11-19 | ||
| JPS63151592A (en) * | 1986-12-17 | 1988-06-24 | 本田技研工業株式会社 | Car body frame for motorcycle |
| JPH05503556A (en) * | 1990-01-17 | 1993-06-10 | ユニロツク・アクチボラグ | Drilling tools for impact and rotational drilling |
| US5009271A (en) * | 1990-07-16 | 1991-04-23 | Milan Maric | Drill assembly |
| JP3379431B2 (en) * | 1998-04-20 | 2003-02-24 | 三菱マテリアル株式会社 | Drilling tools |
| JP3382554B2 (en) * | 1998-12-22 | 2003-03-04 | 三菱マテリアル株式会社 | Drilling tools |
-
2005
- 2005-09-05 SE SE0501979A patent/SE530651C2/en not_active IP Right Cessation
-
2006
- 2006-06-26 KR KR1020087005414A patent/KR20080052575A/en not_active Application Discontinuation
- 2006-06-26 WO PCT/SE2006/000778 patent/WO2007030047A1/en active Application Filing
- 2006-06-26 AU AU2006287962A patent/AU2006287962A1/en not_active Abandoned
- 2006-06-26 EP EP06747961A patent/EP1926882A1/en not_active Withdrawn
- 2006-06-26 CN CNA200680032311XA patent/CN101258301A/en active Pending
- 2006-06-26 CA CA002620473A patent/CA2620473A1/en not_active Abandoned
- 2006-06-26 US US11/991,428 patent/US20090285638A1/en not_active Abandoned
- 2006-06-26 RU RU2008113203/03A patent/RU2008113203A/en not_active Application Discontinuation
- 2006-06-26 JP JP2008529949A patent/JP2009507154A/en active Pending
-
2008
- 2008-02-13 ZA ZA200801476A patent/ZA200801476B/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452475A (en) * | 2013-09-17 | 2013-12-18 | 中煤科工集团西安研究院有限公司 | Hole forming method for underground soft fractured formation casting protection holes of coal mine |
| CN106574486A (en) * | 2014-07-24 | 2017-04-19 | 高级技术有限责任公司 | Devices and systems for extracting drilling equipment through a drillstring |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1926882A1 (en) | 2008-06-04 |
| US20090285638A1 (en) | 2009-11-19 |
| WO2007030047A1 (en) | 2007-03-15 |
| KR20080052575A (en) | 2008-06-11 |
| SE0501979L (en) | 2007-03-06 |
| RU2008113203A (en) | 2009-10-20 |
| CA2620473A1 (en) | 2007-03-15 |
| JP2009507154A (en) | 2009-02-19 |
| AU2006287962A1 (en) | 2007-03-15 |
| ZA200801476B (en) | 2010-04-28 |
| SE530651C2 (en) | 2008-07-29 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080903 |