CA2406083C - Drillable drill bit nozzle - Google Patents
Drillable drill bit nozzle Download PDFInfo
- Publication number
- CA2406083C CA2406083C CA002406083A CA2406083A CA2406083C CA 2406083 C CA2406083 C CA 2406083C CA 002406083 A CA002406083 A CA 002406083A CA 2406083 A CA2406083 A CA 2406083A CA 2406083 C CA2406083 C CA 2406083C
- Authority
- CA
- Canada
- Prior art keywords
- nozzle
- bore
- drill bit
- drilling
- copper
- 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
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
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/61—Drill bits characterised by conduits or nozzles for drilling fluids characterised by the nozzle structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
Abstract
A drill bit nozzle (1) providing a through bore for the passage of drilling fluid through a drill bit. The nozzle (1) is made of a material or materials which can be drilled through by standard well bore drilling equipment. The material(s) are selected to provide a surface (5) to the through bore which has a relatively high resistance to erosion to withstand the abrasive and corrosive impact of jetted drilling fluid. Embodiments are described using a hard chrome/copper combination and a single rubber material.
Description
2
3 The present invention relates to drill bits and nozzles used in
4 conjunction with drill bits for use in the drilling of oil well bores or other earth drilling applications.
7 Rotary drill bits are well known in the art and typically 8 comprise a drill bit body upon which are mounted cutting 9 elements made of a hard material such as tungsten carbide or 0 diamond. The drill bit bodies are typically provided with 1 nozzle passages for circulating drilling fluid from the interior 2 of the drill bit toward the point where the cutting elements 3 engage the bottom of the bore hole.
7 Rotary drill bits are well known in the art and typically 8 comprise a drill bit body upon which are mounted cutting 9 elements made of a hard material such as tungsten carbide or 0 diamond. The drill bit bodies are typically provided with 1 nozzle passages for circulating drilling fluid from the interior 2 of the drill bit toward the point where the cutting elements 3 engage the bottom of the bore hole.
5 Nozzles, both of removable and fixed construction, may
6 optionally be attached to the lower side of a drill bit body and
7 at the end of the nozzle passages for facilitating the jetting
8 of drilling fluid through the passages at the bottom of the .9 hole, thereby providing both a lubrication function in addition !0 to assisting in the carrying away of loose debris and other cut !1 material.
SUBSTITUTE SHEET (RULE 26) It is recognised in the art that the drilling fluid is very abrasive as it jets through the nozzles and accordingly hard materials have been employed in the past for constructing drill bit nozzles. Such materials have been required to withstand high drilling fluid jet velocities and high pressure differentials across the nozzles.
In our co-pending British Patent Application Number GB9930287.9 there is described a drill bit body which is made substantially of a material that may be drilled through by standard or conventional earth bore drilling equipment. Such technologies may be beneficial when, for example, it is desired to drill with casing and it is desired to leave the drill bit in the bore hole during the cementing of a first section of casing. After the cementing has been complete, a further and smaller diameter i drill bit may be employed to extend the well bore and to do this the subsequent drill bit is required to drill through the first drill bit employed.
a However, this technology has not been possible until now if the 1 first or earlier drill bit comprised nozzles as nozzles, previously, have required to be made of a hard material for 3 reasons described above that would resist any subsequent attempt to drill through the nozzles.
6 Tt is an object therefore of the present invention to provide 7 drill bit nozzles that are constructed to withstand the abrasive 8 and erosive impact of jetted drilling fluid, while also being
SUBSTITUTE SHEET (RULE 26) It is recognised in the art that the drilling fluid is very abrasive as it jets through the nozzles and accordingly hard materials have been employed in the past for constructing drill bit nozzles. Such materials have been required to withstand high drilling fluid jet velocities and high pressure differentials across the nozzles.
In our co-pending British Patent Application Number GB9930287.9 there is described a drill bit body which is made substantially of a material that may be drilled through by standard or conventional earth bore drilling equipment. Such technologies may be beneficial when, for example, it is desired to drill with casing and it is desired to leave the drill bit in the bore hole during the cementing of a first section of casing. After the cementing has been complete, a further and smaller diameter i drill bit may be employed to extend the well bore and to do this the subsequent drill bit is required to drill through the first drill bit employed.
a However, this technology has not been possible until now if the 1 first or earlier drill bit comprised nozzles as nozzles, previously, have required to be made of a hard material for 3 reasons described above that would resist any subsequent attempt to drill through the nozzles.
6 Tt is an object therefore of the present invention to provide 7 drill bit nozzles that are constructed to withstand the abrasive 8 and erosive impact of jetted drilling fluid, while also being
9 suitable for subsequent drilling operations intended to drill 0 through drill bit bodies to which the nozzles are attached, and f 1 indeed the nozzles themselves.
~3 A further object of the present invention is to provide a method 14 of drilling a well bore, wherein the drilling method is that SUBSTITUTE SHEET (RULE 26) commonly known as drilling with casing and wherein subsequent drilling may be undertaken by a subsequent drill bit, without the requirement of the removal of the earlier or first drill bit from the well bore, and wherein the earlier or first drill bit includes nozzles.
Other objects and features of this invention will become apparent from time to time throughout the specification and claims as hereinafter related.
The foregoing objectives are accomplished by a new and improved drill bit nozzle comprising a body defining a through bore, wherein the through bore defines a passage for drilling fluid in E use, wherein the surface of the through bore within the body has i a relatively high resistance to erosion and wherein the nozzle i is characterised in that the body is made substantially of a 1 material or materials that allow for the nozzle to be 3 subsequently drilled through by standard well bore drilling a equipment.
1 Preferably, the through bore has an enlarged concave portion at Z an inlet side of the nozzle, communicating with a smaller 3 diameter cylindrical portion.
The nozzle body may be made of two materials, wherein the 6 surface of the through bore is made of a first material, wherein 7 said first material is of relatively thin construction and has a 8 high resistance to erosion, and wherein the remainder of the .9 nozzle body is made of a second material that is easily drillable.
~1 .2 The first or surface material may be a hard chrome.
'r3 Alternatively, tungsten carbide or suitable alloys may be used, S4 their suitability being assessed by their ability to withstand SUBSTITUTE SHEET (RULE 26) erosive forces from the well fluid jetted through the through-bore.
The second material forming substantially the majority of the nozzle body may be made typically of a softer metal, such as nickel, aluminium, copper or alloys of these.
Preferably, the second material may be copper and the surface or first material is hard chrome, wherein the hard chrome is i applied to the copper body by electro-plating.
' Alternatively, a nozzle in accordance with the present invention > may be made of a rubber material. In this respect, it is noted E that while rubber is typically not a "hard" material, it does i nevertheless have a high resistance to erosion. Moreover, i rubber materials may be easily drilled by subsequent drilling 7 bits.
a It may be seen therefore that a nozzle in accordance with 0 invention may be made of one or more materials and that it need 1 not be made entirely or even partially of a metal material. It 2 is also envisaged, for example, that polyurethane or other 3 elastomers may be used.
An~example embodiment of the invention will now be described 6 with reference to the accompanying Figures in which:
8 Figure 1 a) is a sectional elevation of an earth boring drill ,9 bit nozzle;
.0 .1 Figure 1 b) is a simple sectional view through the section y-y .2 on Figure 1 a)~ and s3 SUBSTITUTE SHEET (RULE 26) Figure 2 shows a further drill bit nozzle made substantially of a non-metallic material.
Referring firstly to Figure 1, there is shown a drill bit nozzle which is generally depicted at 1. The drill bit nozzle is adapted to be threadably engaged with a drill bit body (not shown) by virtue of the threaded portions 2. The nozzle 1 is provided with an annular body 3 that defines a through passage or through bore 4.
The through bore 4 is formed with an inlet having a concave enlarged portion 4a which communicates with a cylindrical smaller diameter portion 4b leading to an outlet 7. The E geometry of the through-bore 4 is such that well fluid is jetted i at high velocity out the outlet 7.
i 7 It is recognised in the invention that the nozzle through-bore 4 is intended to receive drilling fluid at high velocities and a with high pressure differentials. Accordingly, the surface 5 of the through bore 4 is constructed of a material that is suitable 1 for withstanding the abrasive and eroding nature of the drilling 2 fluid in use. Not only must the surface of the through passage 3 withstand the eroding forces of the drilling fluid, but in view 4 of the proximity of the nozzles to the cutting surface of the 5 drill bit, excessive wear may be induced in the event of a non-6 resistant material being employed as a result of the impact of 7 small rock particles and other debris cut by the drill bit from 8 the well formation. The erosive effect of rock particles within 9 drill bit nozzles is well known and documented. For this 0 reason, the surface of the through bore 4 is preferably made 1 from a hard material which, in an example embodiment of Figure .2 1, is a hard chrome material. In another example, tungsten .3 carbide may be used as the surface material.
.4 SUBSTITUTE SHEET (RULE 26) However, the surface material will typically be chosen as one which is able to be combined with a softer drillable material whereby this softer drillable material may form substantially the body of the drill bit nozzle, with the exception of the surface herein before mentioned. In the example embodiment illustrated in Figure 1, the second material from which substantially all of the nozzle body is made is copper. Copper is selected as one suitable material as the surface coating of hard chrome may be easily applied to the copper body by electro-plating means. Additionally, copper is sufficiently soft to allow a subsequent drill bit to drill through the body of the nozzle.
Turning now to Figure 2, an alternative nozzle in accordance with the present invention is generally depicted at 10. The i nozzle 10 is made substantially of a single non-metallic material., namely rubber. However, to enable the rubber nozzle i to be attached to a drill bit body, the nozzle is provided with a threaded insert made of a metallic material. The threaded insert 11 is, nevertheless, made of a material which is l sufficiently soft to allow a subsequent drill bit to drill through it.
An advantage of the present invention will be apparent from the method of use of the drill bit nozzle as shown in the Figures 6 and described above which allows for a drill bit bearing drill 7 bit nozzles to be left in a well bore during the cementing of 8 casing and subsequently drilled through by standard well bore 9 drilling equipment to allow for the well to be extended.
1 The invention may be seen to overcome the difficulty of 2 providing drill bit nozzles in a manner that allowed for their ~3 resistance to wear from the erosive characteristics of jetted .4 drilling fluid, while nevertheless enabling subsequent SUBSTITUTE SHEET (RULE 26) conventional or standard well laore drilling equipment to drill through them.
Further modifications and improvements may be incorporated without departing from the scope of the invention herein intended.
SUBSTITUTE SHEET (RULE 26)
~3 A further object of the present invention is to provide a method 14 of drilling a well bore, wherein the drilling method is that SUBSTITUTE SHEET (RULE 26) commonly known as drilling with casing and wherein subsequent drilling may be undertaken by a subsequent drill bit, without the requirement of the removal of the earlier or first drill bit from the well bore, and wherein the earlier or first drill bit includes nozzles.
Other objects and features of this invention will become apparent from time to time throughout the specification and claims as hereinafter related.
The foregoing objectives are accomplished by a new and improved drill bit nozzle comprising a body defining a through bore, wherein the through bore defines a passage for drilling fluid in E use, wherein the surface of the through bore within the body has i a relatively high resistance to erosion and wherein the nozzle i is characterised in that the body is made substantially of a 1 material or materials that allow for the nozzle to be 3 subsequently drilled through by standard well bore drilling a equipment.
1 Preferably, the through bore has an enlarged concave portion at Z an inlet side of the nozzle, communicating with a smaller 3 diameter cylindrical portion.
The nozzle body may be made of two materials, wherein the 6 surface of the through bore is made of a first material, wherein 7 said first material is of relatively thin construction and has a 8 high resistance to erosion, and wherein the remainder of the .9 nozzle body is made of a second material that is easily drillable.
~1 .2 The first or surface material may be a hard chrome.
'r3 Alternatively, tungsten carbide or suitable alloys may be used, S4 their suitability being assessed by their ability to withstand SUBSTITUTE SHEET (RULE 26) erosive forces from the well fluid jetted through the through-bore.
The second material forming substantially the majority of the nozzle body may be made typically of a softer metal, such as nickel, aluminium, copper or alloys of these.
Preferably, the second material may be copper and the surface or first material is hard chrome, wherein the hard chrome is i applied to the copper body by electro-plating.
' Alternatively, a nozzle in accordance with the present invention > may be made of a rubber material. In this respect, it is noted E that while rubber is typically not a "hard" material, it does i nevertheless have a high resistance to erosion. Moreover, i rubber materials may be easily drilled by subsequent drilling 7 bits.
a It may be seen therefore that a nozzle in accordance with 0 invention may be made of one or more materials and that it need 1 not be made entirely or even partially of a metal material. It 2 is also envisaged, for example, that polyurethane or other 3 elastomers may be used.
An~example embodiment of the invention will now be described 6 with reference to the accompanying Figures in which:
8 Figure 1 a) is a sectional elevation of an earth boring drill ,9 bit nozzle;
.0 .1 Figure 1 b) is a simple sectional view through the section y-y .2 on Figure 1 a)~ and s3 SUBSTITUTE SHEET (RULE 26) Figure 2 shows a further drill bit nozzle made substantially of a non-metallic material.
Referring firstly to Figure 1, there is shown a drill bit nozzle which is generally depicted at 1. The drill bit nozzle is adapted to be threadably engaged with a drill bit body (not shown) by virtue of the threaded portions 2. The nozzle 1 is provided with an annular body 3 that defines a through passage or through bore 4.
The through bore 4 is formed with an inlet having a concave enlarged portion 4a which communicates with a cylindrical smaller diameter portion 4b leading to an outlet 7. The E geometry of the through-bore 4 is such that well fluid is jetted i at high velocity out the outlet 7.
i 7 It is recognised in the invention that the nozzle through-bore 4 is intended to receive drilling fluid at high velocities and a with high pressure differentials. Accordingly, the surface 5 of the through bore 4 is constructed of a material that is suitable 1 for withstanding the abrasive and eroding nature of the drilling 2 fluid in use. Not only must the surface of the through passage 3 withstand the eroding forces of the drilling fluid, but in view 4 of the proximity of the nozzles to the cutting surface of the 5 drill bit, excessive wear may be induced in the event of a non-6 resistant material being employed as a result of the impact of 7 small rock particles and other debris cut by the drill bit from 8 the well formation. The erosive effect of rock particles within 9 drill bit nozzles is well known and documented. For this 0 reason, the surface of the through bore 4 is preferably made 1 from a hard material which, in an example embodiment of Figure .2 1, is a hard chrome material. In another example, tungsten .3 carbide may be used as the surface material.
.4 SUBSTITUTE SHEET (RULE 26) However, the surface material will typically be chosen as one which is able to be combined with a softer drillable material whereby this softer drillable material may form substantially the body of the drill bit nozzle, with the exception of the surface herein before mentioned. In the example embodiment illustrated in Figure 1, the second material from which substantially all of the nozzle body is made is copper. Copper is selected as one suitable material as the surface coating of hard chrome may be easily applied to the copper body by electro-plating means. Additionally, copper is sufficiently soft to allow a subsequent drill bit to drill through the body of the nozzle.
Turning now to Figure 2, an alternative nozzle in accordance with the present invention is generally depicted at 10. The i nozzle 10 is made substantially of a single non-metallic material., namely rubber. However, to enable the rubber nozzle i to be attached to a drill bit body, the nozzle is provided with a threaded insert made of a metallic material. The threaded insert 11 is, nevertheless, made of a material which is l sufficiently soft to allow a subsequent drill bit to drill through it.
An advantage of the present invention will be apparent from the method of use of the drill bit nozzle as shown in the Figures 6 and described above which allows for a drill bit bearing drill 7 bit nozzles to be left in a well bore during the cementing of 8 casing and subsequently drilled through by standard well bore 9 drilling equipment to allow for the well to be extended.
1 The invention may be seen to overcome the difficulty of 2 providing drill bit nozzles in a manner that allowed for their ~3 resistance to wear from the erosive characteristics of jetted .4 drilling fluid, while nevertheless enabling subsequent SUBSTITUTE SHEET (RULE 26) conventional or standard well laore drilling equipment to drill through them.
Further modifications and improvements may be incorporated without departing from the scope of the invention herein intended.
SUBSTITUTE SHEET (RULE 26)
Claims (14)
1. A drill bit nozzle comprising a body defining a through bore;
wherein the through bore defines a passage for drilling fluid in use;
wherein the through bore includes a surface made from a relatively hard chrome having a relatively high resistance to erosion; and wherein the body is made substantially of one or more materials that allow for the nozzle to be subsequently drilled through by standard well bore drilling equipment.
wherein the through bore defines a passage for drilling fluid in use;
wherein the through bore includes a surface made from a relatively hard chrome having a relatively high resistance to erosion; and wherein the body is made substantially of one or more materials that allow for the nozzle to be subsequently drilled through by standard well bore drilling equipment.
2. The drill bit nozzle of claim 1, wherein the through bore includes an enlarged concave portion at an inlet side of the nozzle, communicating with a smaller diameter cylindrical portion.
3. The drill bit nozzle of claim 1 or 2, wherein the body is made of two materials, wherein a first material is the hard chrome, said first material being of relatively thin construction, and wherein the body is made of a second material that is easily drillable.
4. The drill bit nozzle of claim 3, wherein the second material is a softer metal comprising nickel, aluminum or copper, or an alloy of two or more of these metals.
5. The drill bit nozzle of claim 3, wherein the second material is copper, and wherein the hard chrome is applied to the copper body by electro-plating.
6. The drill bit nozzle of claim 1 or 2, wherein the nozzle is made substantially by an elastomer.
7. The drill bit nozzle of claim 6, wherein the elastomer is rubber or polyurethane.
8. A method of drilling a well bore, comprising the steps of:
(a) drilling a bore to a first depth using a first drill bit having at least one nozzle, the nozzle comprising a body having a bore for fluid communication through the nozzle, wherein a surface of the bore is fabricated from a relatively thin construction of chrome having a relatively high resistance to erosion; and (b) drilling the bore to a second depth using a second drill bit, the second depth being deeper than the first depth, wherein the second drill bit drills through the first drill bit in the bore at the first depth.
(a) drilling a bore to a first depth using a first drill bit having at least one nozzle, the nozzle comprising a body having a bore for fluid communication through the nozzle, wherein a surface of the bore is fabricated from a relatively thin construction of chrome having a relatively high resistance to erosion; and (b) drilling the bore to a second depth using a second drill bit, the second depth being deeper than the first depth, wherein the second drill bit drills through the first drill bit in the bore at the first depth.
9. A drill bit nozzle comprising a body defining a through bore for passage of drilling fluid in use, the through bore includes a surface made from a relatively thin construction of hard chrome having a relatively high resistance to erosion and the body is made of copper that allows the nozzle to be subsequently drilled through by standard well bore drilling equipment, wherein the hard chrome is applied to the copper body by electro-plating.
10. A nozzle for use with a drill bit comprising a body having a bore for fluid communication through the nozzle, wherein a surface of the bore is fabricated from a relatively thin construction of chrome having a relatively high resistance to erosion.
11. The nozzle of claim 10, wherein the hard chrome is applied to the body by electro-plating.
12. A nozzle for use with a drill bit comprising:
a body made substantially from copper, the body having a bore for fluid communication through the nozzle, a surface of the bore is made from a relatively thin material having a relatively high resistance to erosion.
a body made substantially from copper, the body having a bore for fluid communication through the nozzle, a surface of the bore is made from a relatively thin material having a relatively high resistance to erosion.
13. The nozzle of claim 12, wherein the thin material is hard chrome.
14. The nozzle of claim 12, wherein the thin material is a tungsten carbide or a suitable alloy.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0008988.8 | 2000-04-13 | ||
| GBGB0008988.8A GB0008988D0 (en) | 2000-04-13 | 2000-04-13 | Drill bit nozzle |
| PCT/GB2001/001506 WO2001079650A1 (en) | 2000-04-13 | 2001-04-02 | Drillable drill bit nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2406083A1 CA2406083A1 (en) | 2001-10-25 |
| CA2406083C true CA2406083C (en) | 2006-10-03 |
Family
ID=9889751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002406083A Expired - Fee Related CA2406083C (en) | 2000-04-13 | 2001-04-02 | Drillable drill bit nozzle |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6848517B2 (en) |
| EP (1) | EP1272731B1 (en) |
| AU (1) | AU2001244377A1 (en) |
| CA (1) | CA2406083C (en) |
| DE (1) | DE60124887T2 (en) |
| GB (1) | GB0008988D0 (en) |
| NO (1) | NO327110B1 (en) |
| WO (1) | WO2001079650A1 (en) |
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| US9004195B2 (en) | 2012-08-22 | 2015-04-14 | Baker Hughes Incorporated | Apparatus and method for drilling a wellbore, setting a liner and cementing the wellbore during a single trip |
| US9631446B2 (en) | 2013-06-26 | 2017-04-25 | Impact Selector International, Llc | Impact sensing during jarring operations |
| CN103835653B (en) * | 2014-03-25 | 2016-03-02 | 中国石油大学(北京) | Self-advancing type landwaste abrasive material direct rotary mixing jet drill bit |
| US9951602B2 (en) | 2015-03-05 | 2018-04-24 | Impact Selector International, Llc | Impact sensing during jarring operations |
| US9850709B2 (en) | 2015-03-19 | 2017-12-26 | Newsco International Energy Services USA Inc. | Downhole mud motor with a sealed bearing pack |
| US10428584B2 (en) | 2016-07-13 | 2019-10-01 | Varel International Ind., L.P. | Bit for drilling with casing or liner string and manufacture thereof |
| US10323464B1 (en) | 2018-04-04 | 2019-06-18 | Saudi Arabian Oil Company | Wellbore drill bit nozzle |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3111179A (en) | 1960-07-26 | 1963-11-19 | A And B Metal Mfg Company Inc | Jet nozzle |
| NL6411125A (en) * | 1963-09-25 | 1965-03-26 | ||
| US4241878A (en) * | 1979-02-26 | 1980-12-30 | 3U Partners | Nozzle and process |
| US4392534A (en) * | 1980-08-23 | 1983-07-12 | Tsukamoto Seiki Co., Ltd. | Composite nozzle for earth boring and bore enlarging bits |
| US4407378A (en) | 1981-03-11 | 1983-10-04 | Smith International, Inc. | Nozzle retention method for rock bits |
| US5148875A (en) * | 1990-06-21 | 1992-09-22 | Baker Hughes Incorporated | Method and apparatus for horizontal drilling |
| US5494122A (en) | 1994-10-04 | 1996-02-27 | Smith International, Inc. | Composite nozzles for rock bits |
| DE59508569D1 (en) * | 1995-10-09 | 2000-08-17 | Baker Hughes Inc | Method and drill for drilling holes in underground formations |
| GB9603402D0 (en) * | 1996-02-17 | 1996-04-17 | Camco Drilling Group Ltd | Improvements in or relating to rotary drill bits |
| CA2334741C (en) | 1998-06-11 | 2006-04-25 | Bbl Downhole Tools Ltd. | Casing drilling shoe |
| CA2271401C (en) | 1999-02-23 | 2008-07-29 | Tesco Corporation | Drilling with casing |
| GB2372765A (en) | 2001-02-27 | 2002-09-04 | Philip Head | Use of coiled tubing and jet drilling to install a casing |
| FR2841293B1 (en) | 2002-06-19 | 2006-03-03 | Bouygues Offshore | TELESCOPIC GUIDE FOR DRILLING AT SEA |
-
2000
- 2000-04-13 GB GBGB0008988.8A patent/GB0008988D0/en not_active Ceased
-
2001
- 2001-04-02 AU AU2001244377A patent/AU2001244377A1/en not_active Abandoned
- 2001-04-02 WO PCT/GB2001/001506 patent/WO2001079650A1/en active IP Right Grant
- 2001-04-02 DE DE60124887T patent/DE60124887T2/en not_active Expired - Lifetime
- 2001-04-02 EP EP01917295A patent/EP1272731B1/en not_active Expired - Lifetime
- 2001-04-02 CA CA002406083A patent/CA2406083C/en not_active Expired - Fee Related
- 2001-04-02 US US10/257,662 patent/US6848517B2/en not_active Expired - Lifetime
-
2002
- 2002-10-09 NO NO20024864A patent/NO327110B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| US20030164250A1 (en) | 2003-09-04 |
| NO327110B1 (en) | 2009-04-27 |
| NO20024864L (en) | 2002-12-09 |
| WO2001079650A1 (en) | 2001-10-25 |
| CA2406083A1 (en) | 2001-10-25 |
| EP1272731A1 (en) | 2003-01-08 |
| NO20024864D0 (en) | 2002-10-09 |
| AU2001244377A1 (en) | 2001-10-30 |
| GB0008988D0 (en) | 2000-05-31 |
| EP1272731B1 (en) | 2006-11-29 |
| DE60124887D1 (en) | 2007-01-11 |
| DE60124887T2 (en) | 2007-07-05 |
| US6848517B2 (en) | 2005-02-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20190402 |