CN101349144A - Drill bit - Google Patents
Drill bit Download PDFInfo
- Publication number
- CN101349144A CN101349144A CNA2008101377283A CN200810137728A CN101349144A CN 101349144 A CN101349144 A CN 101349144A CN A2008101377283 A CNA2008101377283 A CN A2008101377283A CN 200810137728 A CN200810137728 A CN 200810137728A CN 101349144 A CN101349144 A CN 101349144A
- Authority
- CN
- China
- Prior art keywords
- drill bit
- footpath
- zone
- rotation
- dish
- 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.)
- Granted
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims description 19
- 238000005553 drilling Methods 0.000 claims description 9
- 230000013011 mating Effects 0.000 claims description 2
- 230000004075 alteration Effects 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000036346 tooth eruption Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1092—Gauge section of drill bits
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
- E21B7/064—Deflecting the direction of boreholes specially adapted drill bits therefor
Abstract
A drill bit is provided which has a main body rotating about an axis and a a cutting face 10 for removing rock or the like. The bit is rotated as it is connected to a drillstring and includes a gauge region near the cutting face. The gauge region 14 includes at least three discs 30, the radii of which extend perpendicularly from the axis of rotation A-A. These discs 30 are spaced apart along the axis of rotation and are arranged on the main body, as well as having circumferential surfaces arranged such that the discs are bounded by an imaginary three dimensional conical sectional surface, the diameter of which perpendicular to the axis of rotation A-A varies in a non-proportional manner along the axis as a function of distance from the cutting face 10.
Description
Technical field
Invention described herein relates generally to the drill bit that is used for mine working.
Background technology
The conventional drill that is used for mine working normally has the elongate structure of common circular cross-section, and this elongate structure comprises three major parts: the first, exist and the cutting face that is contacted by excavated material.This generally includes a plurality of cutting elements, and they cause material to be cut facing to the motion that is cut material or dig out.The second, there is linkage, it is usually located at end relative with the cutting face on the drill bit, so that drill bit is connected on the motor that is generally rotary drill column.The 3rd, so-called guarantor zone, footpath (gauge region), it is between cutting face and linkage, and the side that its objective is the hole that contact is drilled is to stablize the motion of drill bit.Protecting directly, the zone does not have cutting element usually and has and the similar diameter of the size in drilled hole.Protecting the regional passage that also provides on its surface in footpath removes from the cutting face to allow cutting material and drilling fluid.Protect the zone, footpath and comprise linear taper, just used the diameter of protecting the zone, footpath and structure, therefore protect the zone, footpath and be generally conical butt from the proportional variation of distance in cutting face.
In particular environment, the expectation drill bit is diverted (steer) so that it moves ahead along a curved path in the direction that requires.In this case, protecting the regional part surface in footpath is pressed on the wall of boring.This is main problem, because this not only causes drill bit to become unstable, and causes energy dissipation unnecessarily degrading drill hole wall and/or protecting regional described surface, footpath.Also do not have cutting element usually because protect the surface in zone, footpath, the attrition resistant materials or the overburden of sclerosis (but can have) this means that the impact of it and drill hole wall will cause a large amount of wearing and tearing.
The present invention manages to improve shortcoming described above.
Summary of the invention
According to the one side of invention, be provided for the drill bit of steering drilling, it comprises: have the main body of axis, this main body is around the axis rotation when work; The cutting face, when work, it moves on the material surface that is cut and causes this material to be dug out or scrape; Be used for drill bit is connected to the linkage of rotary movement source, described linkage also can apply power on drill bit, so that its cutting face is urged on the material that is cut; With zone, guarantor footpath, it has is the cross section of central circular substantially with the rotation, be positioned in the middle of described cutting face and the described linkage, the diameter in described circular substantially cross section changes according to the disproportional mode with the function from the distance in cutting face on its partial-length at least.
Preferably, protect the zone, footpath and do not have cutting element.This causes stability of bit to increase.
Advantageously, protect regional being formed in footpath and have continuous surface.This allows to protect the simple overall structure in zone, footpath.
Desirably, it is crooked protecting the profile that directly is parallel to rotation.
Advantageously, protect the zone that the profile that directly is parallel to rotation comprises at least one spill.
As selection, protect the zone that the profile that directly is parallel to rotation comprises at least one convex.
As a further alternative, protect the profile that directly is parallel to rotation and not only comprise spill but also comprise convex region.
As selection, to protect the zone, footpath and be formed at least three dishes, these three dishes are connected on the main body and are spaced apart along rotation, have the indenture part between described dish.Reduce owing to protect the superficial area in zone, footpath, make the weight of drill bit reduce and help the minimizing of drill bit frictional force.
Protecting under the situation that the zone, footpath forms by a plurality of dishes, the surface of contact drill hole wall when work of at least one dish is flat substantially and expects at angle with rotation.This makes dish form complicated profile.
As selection, to protect under the regional situation about forming in footpath by a plurality of dishes, the surface of contact drill hole wall when work of at least one dish is crooked.This makes dish form almost any desired contour.
Preferably, protecting under the regional situation about being formed by a plurality of dishes in footpath, the diameter of dish and/or surface configuration are selected so that simulate the profile of a continuous surface as far as possible.
Desirably, be selected as mating the curvature of the boring of generation at the profile that is parallel to rotation of the guarantor footpath region surface that work contact with drill hole wall the time, the while is used as drill bit the part of directed drilling system.
Advantageously, the described at least diameter of protecting one of footpath ring can change.This change or by when drill bit is worked, mechanically carrying out or replacing at least one dish when creeping into and obtain promoting by being not used in when drill bit.The variation that this will allow the drill bit operating characteristic includes but not limited to the most effective bore path curvature of drill bit when creeping into.
Preferably, the directly regional surface of guarantor or a plurality of surface that the time contacts with drill hole wall in work comprise passage, with passing through of the cutting material that allows to leave the cutting face.This helps to make things convenient for cutting material leaving and make it to extract out from boring from the cutting face.Protecting under the regional situation about being formed by a plurality of dishes in footpath, the space between passage is guaranteed to coil can not stopped up by chip.
Description of drawings
This invention further describes with reference to accompanying drawing by the mode of example, wherein:
Figure 1A-1B illustrates the lateral view of two independent examples of the prior art of the drill bit that is used for controlling drilling well.
Fig. 2 A-2C illustrates three lateral views of embodiment independently of the present invention.
Fig. 3 illustrates the lateral view of an alternative embodiment of the invention, comprises a plurality of rings of protecting the zone, footpath.
Fig. 4 illustrates the lateral view of other embodiments of the invention, comprises a plurality of rings of protecting the zone, footpath.
What Fig. 5 illustrated another embodiment of the present invention looks side figure, comprises a plurality of rings of protecting the zone, footpath.
Fig. 6-the 8th, the schematic diagram of the profile in the embodiment of the invention.
The specific embodiment
Clearly illustrate that as Fig. 1 various drill bits comprise cutting face 10 (cutting teeth does not show), when work, move on the material surface that is cut and cause this material to be dug out or scrape in cutting face 10.The motor (not shown) centers on the axis A-A rotary drilling-head by axle or drill string (also not shown), and wherein this axle or drill string are connected to the join domain 12 of drill bit by accessory connector device 13.This (not shown) also can apply power on drill bit, it is inferior on the material that is cut that cutting face 10 is pushed.In the cutting face 10 and join domain 12 in the middle of be to protect zone, footpath 14.Shoulder 15 in the join domain couples together with accessory connector 13 protecting the zone, footpath.Thereby protect the 14 general sides that contact the boring of the face that is cut 10 cuttings once in a while, zone, footpath and in operation, provide stability for drill bit.Protect zone, footpath 14 and be generally circular cross-section, firm not as cutting face 10 in a particular embodiment, therefore wearing and tearing easily.
Zone, guarantor on known drill bit footpath 14 or have roughly around the uniform diameter (not shown) of rotation A-A, perhaps have the gradient make diameter 16 with 10 change to be used for steering drilling from the cutting face along the distance of rotation A-A proportional 18.
Drill bit shown in Figure 1 has problem, if they are included in the well system (just the path of drill bit is not a straight line) that can turn to, so because they carry out curved path, the part 20 of protecting the zone, footpath will be pushed in the drill hole wall.This not only causes wasting energy owing to unnecessary frictional force, and causes drill bit to become unstable and cause it to turn to.Be not squeezed in the material that is cut with any significant power because do not wish to protect the zone, footpath, so in these cases considerable wear will take place, this may cause drill bit just to become unstable before being ground away in cutting face 10.
Three independent embodiment of the present invention that Fig. 2 A, 2B and 2C show also comprise cutting face 10, join domain 12 and protect zone, footpath 14.In each example, protect zone, footpath 14 and have the curved surface profile: 28 both combinations of 26 and convex of (bell) 22 of spill, 24 and spill of convex.If these profiles make that partly protecting the zone, footpath when drill bit is carried out crooked drilling well path is dropped to minimum by the possibility that impact enters drill hole wall.This is because such fact: each all has such zone, guarantor footpath, this guarantors footpath regional on drill bit end relative with the cutting face have the diameter littler than cutting face 10.Between guarantor zone, footpath and join domain, there is not outstanding edge yet.The part 20 that these characteristics cause being squeezed into the drill bit of drill hole wall drops to minimum or is eliminated.
Another aspect of the present invention is presented among Fig. 3,4 and 5 the embodiment.Protect zone, footpath 14 and be not that drill bit in the embodiment that Fig. 2 A, 2B and 2C show is the same forms continuous surface, protect zone, footpath 14 and can comprise three dishes 30, its circumferential edges 32,34,36 is formed guarantor footpath region surface, promptly should contact drill hole wall in the surface when work.These dishes occupy certain space and are positioned to form the profile by the represented discrete portions of line 38.The effect in the zone, guarantor footpath 14 of the profile 38 that this makes these dishes to simulate to have continuous surface.These dishes are connected to the main body 40 of central authorities.These dishes 30 can be moved and also can rotate with respect to main body 40, yet they are fixed in present embodiment.Therefore because the superficial area of contact drill hole wall has reduced, the frictional force that makes rotary drilling-head cause has reduced, and coils 30 use and has reduced energy loss, and coil 30 use and also reduced weight and the cost of making the needed material of drill bit.
The simplest and the shape therefore ring of cheap manufacturing is the shape that as shown in Figure 3 circumferential edges 32 is parallel to the rotation A-A of drill bit.Simulate specific curvature profile 38 if desired, so parallel and flat edge 32 provides being similar to the difference of profile as far as possible.By using tapered edge shown in Figure 4 34 that improvement is provided,, as shown in Figure 5, be exaggerated at the curved surface of Fig. 5 mid-game although profile can accurately be followed by the dish 36 that uses the crooked outline edge.
The profile 38 of regional 14 drill bits in the guarantor on perhaps continuous or annular 30 surfaces footpath can be selected its can match-drilled during as steering drilling system a part of with convenient drill bit specific curvature.Such drill bit is especially effective when boring the hole of described curvature.
Protect regional 14 surfaces, footpath and can comprise the axial arranged passage of a plurality of cardinal principles 42 in addition, these passages help to protect drilling cuttings between surface, footpath and the drill hole wall and leave cutting edge and pass through.
Should recognize: can carry out multiple change to device within the scope of the invention.The example of such change includes but not limited to use the guarantor of varying number directly to encircle, and uses difform center main, uses different cutting faces structure, shaft connector is integrated into protects in the zone, footpath, uses different devices that drill bit is connected on the driving shaft; Use and protect the footpath ring, its shape and diameter can or mechanically or by replacing change, to change the drill bit operating characteristic.
Claims (18)
1, a kind of drill bit comprises:
Main body with rotation, described main body is rotated around described rotation during work,
Moving on the surface of the material that described work plane is being cut when work in the cutting face, causes described material to be dug out or scrape,
Be used for described drill bit is connected to the linkage of rotary movement source when work, described linkage also can apply power on described drill bit, so that its cutting face is urged on the described material that is cut,
Protect the zone, footpath, it has is the cross section of central circular with the rotation substantially, is positioned at the centre of described cutting face and described linkage, and the diameter in zone, described guarantor footpath changes according to the disproportional mode with the function from the distance in cutting face.
2, drill bit as claimed in claim 1, wherein, zone, described guarantor footpath does not have cutting element.
3, drill bit as claimed in claim 1 or 2, wherein, the profile that zone, described guarantor footpath is parallel to described rotation is crooked.
4, as any one described drill bit of claim 1 to 2, wherein, the profile that zone, described guarantor footpath is parallel to described rotation is a spill.
5, as any one described drill bit of claim 1 to 2, wherein, the profile that zone, described guarantor footpath is parallel to described rotation is a convex.
6, as any one described drill bit of claim 1 to 2, wherein, the described regional profile that is parallel to described rotation in footpath of protecting comprises spill and convex region.
7, drill bit as claimed in claim 1, wherein, zone, described guarantor footpath forms continuous surface.
8, drill bit as claimed in claim 1, wherein, zone, described guarantor footpath forms at least three dishes, and described at least three dishes are connected on the described main body and are spaced apart along described rotation.
9, drill bit as claimed in claim 8, wherein, the surface of contact drill hole wall when work of at least one dish is parallel to described rotation.
10, drill bit as claimed in claim 8, wherein, the surface at when work contact drill hole wall of at least one dish be substantially flat and with described rotation at angle.
11, drill bit as claimed in claim 8, wherein, the surface of contact drill hole wall when work of at least one dish is crooked.
12, as any one described drill bit of claim 8 to 11, wherein, the diameter of each dish and/or surface configuration are selected as simulating the profile of a continuous surface as far as possible.
13, as any one described drill bit of claim 8 to 11, wherein, at least one dish is movably.
14, drill bit as claimed in claim 13, wherein, described at least one dish is removed and is replaced by the dish of different-diameter and/or shape, so that change the well properties of described drill bit.
15, as any one described drill bit of claim 8 to 11, wherein, at least one described diameter and/or shape of protecting the zone, footpath can be by mechanical alteration when work.
16, as any one described drill bit of claim 8 to 11, wherein, at least one dish can be around described main body rotation.
17, drill bit as claimed in claim 1 wherein, is selected as mating the curvature of the boring of generation at the profile that is parallel to described rotation of the guarantor footpath region surface that work contact with drill hole wall the time, and the while, described drill bit was used as the part of directed drilling system.
18, drill bit as claimed in claim 1, wherein, the guarantor footpath region surface that contacts with drill hole wall comprises passage, passes through with the cutting material that allows to leave described cutting face.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0713923.1 | 2007-07-18 | ||
| GB0713923.1A GB2451100B (en) | 2007-07-18 | 2007-07-18 | Drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101349144A true CN101349144A (en) | 2009-01-21 |
| CN101349144B CN101349144B (en) | 2014-01-01 |
Family
ID=38476483
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201259263U Expired - Fee Related CN201221316Y (en) | 2007-07-18 | 2008-07-18 | Drill bit |
| CN200810137728.3A Expired - Fee Related CN101349144B (en) | 2007-07-18 | 2008-07-18 | Drill bit |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201259263U Expired - Fee Related CN201221316Y (en) | 2007-07-18 | 2008-07-18 | Drill bit |
Country Status (3)
| Country | Link |
|---|---|
| CN (2) | CN201221316Y (en) |
| GB (1) | GB2451100B (en) |
| RU (1) | RU2492307C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109807374A (en) * | 2017-11-22 | 2019-05-28 | 波音公司 | Taper bit and automation process |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2451100B (en) * | 2007-07-18 | 2012-02-15 | Schlumberger Holdings | Drill bit |
| US9926779B2 (en) | 2011-11-10 | 2018-03-27 | Schlumberger Technology Corporation | Downhole whirl detection while drilling |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3006224A1 (en) * | 1980-02-20 | 1981-08-27 | Hermann-Dietrich 2300 Kiel Molsner | Ram-type test boring system - with leading point comprising concentric disc with diameters decreasing towards end |
| SU1430493A1 (en) * | 1986-07-14 | 1988-10-15 | Среднеазиатский Научно-Исследовательский Институт Геологии И Минерального Сырья | Rotary bit drill |
| US5147000A (en) * | 1990-06-19 | 1992-09-15 | Norvic S.A. | Disc drill bit |
| CN2076152U (en) * | 1990-10-23 | 1991-05-01 | 四川石油管理局钻采工艺研究所 | Pilot bit |
| CN2718211Y (en) * | 2004-04-16 | 2005-08-17 | 辽河石油勘探局 | Reconditioning casing probe milling awl |
| GB0418382D0 (en) * | 2004-08-18 | 2004-09-22 | Reed Hycalog Uk Ltd | Rotary drill bit |
| US9574405B2 (en) * | 2005-09-21 | 2017-02-21 | Smith International, Inc. | Hybrid disc bit with optimized PDC cutter placement |
| GB2451100B (en) * | 2007-07-18 | 2012-02-15 | Schlumberger Holdings | Drill bit |
-
2007
- 2007-07-18 GB GB0713923.1A patent/GB2451100B/en not_active Expired - Fee Related
-
2008
- 2008-03-20 RU RU2008110524/03A patent/RU2492307C2/en not_active IP Right Cessation
- 2008-07-18 CN CNU2008201259263U patent/CN201221316Y/en not_active Expired - Fee Related
- 2008-07-18 CN CN200810137728.3A patent/CN101349144B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109807374A (en) * | 2017-11-22 | 2019-05-28 | 波音公司 | Taper bit and automation process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101349144B (en) | 2014-01-01 |
| GB2451100B (en) | 2012-02-15 |
| GB0713923D0 (en) | 2007-08-29 |
| GB2451100A (en) | 2009-01-21 |
| CN201221316Y (en) | 2009-04-15 |
| RU2008110524A (en) | 2009-09-27 |
| RU2492307C2 (en) | 2013-09-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140101 Termination date: 20170718 |