EP0682738B1 - Drilling apparatus - Google Patents
Drilling apparatus Download PDFInfo
- Publication number
- EP0682738B1 EP0682738B1 EP92911558A EP92911558A EP0682738B1 EP 0682738 B1 EP0682738 B1 EP 0682738B1 EP 92911558 A EP92911558 A EP 92911558A EP 92911558 A EP92911558 A EP 92911558A EP 0682738 B1 EP0682738 B1 EP 0682738B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drilling
- nozzles
- cutter head
- drill
- pipe
- 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 - Lifetime
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 64
- 239000002184 metal Substances 0.000 claims abstract description 10
- 239000002689 soil Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000011435 rock Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 abstract description 8
- 239000012530 fluid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001137251 Corvidae Species 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000019993 champagne Nutrition 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 235000015108 pies Nutrition 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000004575 stone Substances 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
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/605—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a core-bit
-
- 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
- E21B10/02—Core 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
- E21B10/36—Percussion drill bits
- E21B10/38—Percussion drill bits characterised by conduits or nozzles for drilling fluids
-
- 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
- E21B17/18—Pipes provided with plural fluid passages
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
Definitions
- the present invention relates to a drilling apparatus, in particular for drilling of holes preferably in soil consisting essentially of glacier deposits or comparatively soft rocks, said drilling apparatus comprising a drilling pipe with a cutter head placed on the front end, the drilling pipe consisting of two coaxial pipes forming an interspace, through which a drilling medium such as water or air can be introduced and removed together with chips from the drilling through the unobstructed clear of the inner pipe, the cutter head comprising a number of hard metal bits and nozzles in between, through which the drilling medium can flow under pressure, and furthermore a number of radially inwards directed nozzles at a short distance from the cutter head and a number of ejector nozzles, which is directed obliquely inwards in a direction away from the cutter head.
- a number of ports opens into the clear of the coaxial pies forming the drill string.
- jets of pressurized fluid are directed into the inner pipe.
- the ports are directed upwards so that the jets of pressurized fluid may support transport of the material up the inner pipe.
- the jets also have the effect of decomposing the material into smaller particles, which more easily will follow the flow of drilling fluid through the inner pipe. This effect, however, eliminates the possiblity taking up a core for analyzing the layers of earth.
- the boring head is provided with a cutting edge preventing the formation of a core to be passed through the inner pipe, but acoording to EP-A-0 244 986 a core for analyzing may be produced.
- the core may be brought up by means of a sampling tube, which is inserted into the inner pipe of the drill string. This is a complicated procedure requiring extra equipment to be inserted into the drill string.
- the object of the invention is to provide a simple arangement by means of which cores or samples may be taken and brought up through the inner pipe.
- the drilling apparatus is characterized in that the drillling pipe comprises two coaxial pipe members, which are arranged in an end to end relationship and rotating with respect to each other through a predetermined angle, said pipe members being provided with abutment surfaces, which in one of the positions disconnect the supply of drilling medium to some of the nozzles and in the other position leave the passage open.
- the supply of drilling medium to both the ejector nozzles directed upwards and the radially directed nozzles is disconnected in one of the positions.
- Fig. 1 shows the front end of a drill 1 comprising the cutter head.
- the drill consists of two coaxial pipes 2 and 3, between which an annular interspace, extending over the whole length of the drill, is provided.
- the interspace forms a supply duct for the drilling medium used, said medium being for instance water, drilling mud or air, depending on the type of drilling job and on the type of the assisting eqipment accompanying the drill.
- the two coaxial pipes are at the front end of the drill connected with one another by means of an end wall 4 forming the basis of the cutter head of the drill.
- the cutter head comprises a number of cutting metal bits 5, which in the embodiment shown approx.
- the cutting metal bits are preferably placed with a mutual distance along two concentric circles in such a way that the two hemispherically shaped heads of the cutting metal bits extend somewhat outside the inner wall of the inner pipe and the outer wall of the outer pipe 2, respectively.
- the cutting metal bits 5 are thereby able to break down the soil, in which the drill operates, in a track so wide that a clear is established around the drill.
- the nozzles 6 may in a preferred embodiment comprise two series of nozzles, in which one series forms an angle of 10-15° inwards towards the axis of the drill and the other series correspondingly forms an angle outwards of 10-15° in relation to the axis of the drill.
- the central core which is during the drilling left in the clear of the inner pipe, is decomposed and transported out of the bore by means of drilling medium, which is injected partly through a pair of essentially radially inwards directed ejector nozzles 8.
- the ejector nozzles Apart from the function of transporting the decomposed material out of the drill through the inner of the drill, the ejector nozzles at the same time control the static pressure on the column of drilling medium on the outside of the drill. It is preferable that only a smaller part of the material cleared is transported upwards along the outer surface of the drill, where it will increase friction and wear of the drill during its rotation.
- the nozzles 6 are placed in a short distance from the end surface of the drill, while the nozzles 7 may be placed at some distance from the end of the drill.
- the distance is not criitcal, but it is preferably comparatively small, so that a zone with a very heavy turbulence is created in the inner of the front end of the drill, said turbulence disintegrate very effectively the material, which is conveyed up into the inner of the drill as the drill penetrates down into the layers of soil, in which drilling is performed.
- the drilled material is brought out of the drill in a disintegrated and suspended condition in the drilling medium used for the drilling.
- water is used as drilling medium, said water being supplied at a pressure of 12-20 bar, but the drill can also be used with a drilling mud which is thickened by means of for instance bentonite, or by means of air supplied at a corresponding pressure or at a somewhat higher pressure.
- air is a preferred alternative, which is in practice particularly easy to handle and effective, especially because of the fact that the drill according to the invention operates very quickly in comparison with the known drills, for which reason the necessary consumption of air becomes moderate on account of the shorter drilling time.
- the drilling apparatus may be constructed in such a way that it is possible to take up coherent cores.
- the embodiment which is shown in Figs. 2 and 3, comprises a front part of the drill 1 with the nozzles and the cutter head shown in Fig. 3, said front part being rotatable in relation to the remaining shaft of the drill, the front end of which is shown in Fig. 2.
- the two parts of the drill are connected along a dividing area acting as a valve for the control of the supply of drilling medium to the nozzles directed towards the center of the clear in the inner pipe.
- Fig. 2 shows an embodiment of the joint surface 9 on the front part of the drill shaft.
- the joint surface comprises a pair of keyhole-shaped openings 10 engaging a corresponding pair of studs 11 placed on the end surface 12 of the drill shaft (Fig. 3) cooperating with the joint or abutment surface 9.
- the studs 11 have a head 14, which may just pass through the enlarged part 15 of the openings 10. After insertion in the openings 10, the studs are locked in the narrow part of the openings 10 by means of set screws 16. The studs 11 cannot pass the screws into the enlarged part, and the two parts of the drill are thereby safely connected.
- the dividing area 9 furthermore comprises some holes 17 connected with ducts, which supply the inwards towards the inner of the drill directed nozzles with drilling medium. These holes 17 are placed in front of holes 18 in the end surface 12 in such a way that the holes 17 and 18 are on line in the angular position, which the two parts have, when the studs are in one end of the keyhole-shaped openings, and displaced so much in relation to each other that there is no passage, when the studs 11 are in the position defined by the set screws 16. In the position, in which the nozzles directed towards the clear are closed, the hole 18 is positioned in front of the circle 19 drawn in broken lines.
- the opening and the closing of the passages through the two set of holes 17 and 18 are controlled by a change of the rotational direction of the drill.
- the supply of drilling medium to the nozzles directed inwards towards the clear in the drill is blocked, and if drilling is made with this rotational direction a core of the material, in which the drill penetrates, will form in the inner of the drill.
- This core may either be taken up together with the drill or by changing the rotational direction of the drill, whereby the radially inwards directed nozzles are provided with drilling medium, which will cut off the core, which will then under normal circumstances be shot up through the inner of the drill by means of a flow of drilling medium introduced through the ejector nozzles.
- the method described requires when air is used as drilling medium certain precautions to ensure a safe catching of the core, which is on account of the expansion of the air shoot out of the drill pipe like a projectile.
- the contact surface may also be elaborated in other ways.
- the contact surface may comprise one or more cylindrical or conical sections, which can guide the two parts radially in relation to each other.
- the contact surface When constructing the contact surface with a cylindrical section the need for keyhole-shaped openings does not exist, as the two parts may be interlocked by means of one or more radially extending pins, which are displaceable in oblong holes extending along a part of the circumphery of the other part.
- the valve function is secured in a corresponding way through openings or recesses which are in line with one another in one of the angular positions, and which in the other position are displaced so much mutually that there is no passage between the holes.
- passage should be allowed through some of the pairs of holes which are connected to the nozzles placed in the end wall, said nozzles ejecting approximately axially directed jets of drilling medium into the interspaces between the cutting metal bits.
- These holes may have a suitable oblong shape which ensuring a suitable flow cross section in both positions, or they may be elaborated in such a way that the flow cross section is smallest when the remaining nozzles are blocked and the biggest pressure is available for overcoming the flow resistance.
Abstract
Description
- The present invention relates to a drilling apparatus, in particular for drilling of holes preferably in soil consisting essentially of glacier deposits or comparatively soft rocks, said drilling apparatus comprising a drilling pipe with a cutter head placed on the front end, the drilling pipe consisting of two coaxial pipes forming an interspace, through which a drilling medium such as water or air can be introduced and removed together with chips from the drilling through the unobstructed clear of the inner pipe, the cutter head comprising a number of hard metal bits and nozzles in between, through which the drilling medium can flow under pressure, and furthermore a number of radially inwards directed nozzles at a short distance from the cutter head and a number of ejector nozzles, which is directed obliquely inwards in a direction away from the cutter head.
- In the known apparatuses a number of ports opens into the clear of the coaxial pies forming the drill string. Through the ports jets of pressurized fluid are directed into the inner pipe. The ports are directed upwards so that the jets of pressurized fluid may support transport of the material up the inner pipe. The jets also have the effect of decomposing the material into smaller particles, which more easily will follow the flow of drilling fluid through the inner pipe. This effect, however, eliminates the possiblity taking up a core for analyzing the layers of earth. With the apparatus according to EP-A-0 124 290 the boring head is provided with a cutting edge preventing the formation of a core to be passed through the inner pipe, but acoording to EP-A-0 244 986 a core for analyzing may be produced. The core may be brought up by means of a sampling tube, which is inserted into the inner pipe of the drill string. This is a complicated procedure requiring extra equipment to be inserted into the drill string.
- The object of the invention is to provide a simple arangement by means of which cores or samples may be taken and brought up through the inner pipe.
- According to the invention the drilling apparatus is characterized in that the drillling pipe comprises two coaxial pipe members, which are arranged in an end to end relationship and rotating with respect to each other through a predetermined angle, said pipe members being provided with abutment surfaces, which in one of the positions disconnect the supply of drilling medium to some of the nozzles and in the other position leave the passage open.
- By changing the direction of rotation of the drill it is possible to open or close the nozzles directed into the clear of the inner pipe and interrupt the flow through the nozzles. When the nozzles are closed, a core wil be formed in the inner pipe, and by changing the direction of rotation of the drill the nozzles are opened and the core will be separated from the earth below the drill head and brought up through the inner pipe.
- According to the invention the supply of drilling medium to both the ejector nozzles directed upwards and the radially directed nozzles is disconnected in one of the positions.
- The invention will be described in detail in the following with reference to the drawing, in which
- Fig. 1 in perspective shows the front part of a drilling apparatus according to the invention partially intersected,
- Fig. 2 shows the end surface of one part of a drilling apparatus according to the invention consisting of two mutually angularly displaceable parts, and
- Fig. 3 shows the front part of a drilling apparatus consisting of two parts corresponding to the embodiment according to Fig. 2 seen from the side.
- Fig. 1 shows the front end of a drill 1 comprising the cutter head. The drill consists of two
coaxial pipes 2 and 3, between which an annular interspace, extending over the whole length of the drill, is provided. During the operation of the drill the interspace forms a supply duct for the drilling medium used, said medium being for instance water, drilling mud or air, depending on the type of drilling job and on the type of the assisting eqipment accompanying the drill. The two coaxial pipes are at the front end of the drill connected with one another by means of an end wall 4 forming the basis of the cutter head of the drill. The cutter head comprises a number ofcutting metal bits 5, which in the embodiment shown approx. have the shape of a champagne cork with a cylindrical shaft 5a inserted into a bore in the end wall 4 running in the axial direction of the drill and having a preferably hemispherically shapedhead 5b. The cutting metal bits are preferably placed with a mutual distance along two concentric circles in such a way that the two hemispherically shaped heads of the cutting metal bits extend somewhat outside the inner wall of the inner pipe and the outer wall of the outer pipe 2, respectively. Thecutting metal bits 5 are thereby able to break down the soil, in which the drill operates, in a track so wide that a clear is established around the drill. - During the drilling the drill is brought into rotation, the cutter head with the cutting metal bits loosing the soil in front of the drill. If the drill meets a stone or other hard items in the soil layers, these will be crushed by the cutting metal bits. The soil loosened is removed from the area in front of the drill by means of a number of jets of drilling medium, ejected from a corresponding number of essentially axially directed
nozzles 6 in the end wall 4. Thenozzles 6 may in a preferred embodiment comprise two series of nozzles, in which one series forms an angle of 10-15° inwards towards the axis of the drill and the other series correspondingly forms an angle outwards of 10-15° in relation to the axis of the drill. - The central core, which is during the drilling left in the clear of the inner pipe, is decomposed and transported out of the bore by means of drilling medium, which is injected partly through a pair of essentially radially inwards directed ejector nozzles 8. Apart from the function of transporting the decomposed material out of the drill through the inner of the drill, the ejector nozzles at the same time control the static pressure on the column of drilling medium on the outside of the drill. It is preferable that only a smaller part of the material cleared is transported upwards along the outer surface of the drill, where it will increase friction and wear of the drill during its rotation. The
nozzles 6 are placed in a short distance from the end surface of the drill, while thenozzles 7 may be placed at some distance from the end of the drill. The distance is not criitcal, but it is preferably comparatively small, so that a zone with a very heavy turbulence is created in the inner of the front end of the drill, said turbulence disintegrate very effectively the material, which is conveyed up into the inner of the drill as the drill penetrates down into the layers of soil, in which drilling is performed. In connection with the drilling apparatus according to the invention the drilled material is brought out of the drill in a disintegrated and suspended condition in the drilling medium used for the drilling. Normally, water is used as drilling medium, said water being supplied at a pressure of 12-20 bar, but the drill can also be used with a drilling mud which is thickened by means of for instance bentonite, or by means of air supplied at a corresponding pressure or at a somewhat higher pressure. In the case of drilling carried out, where ample amounts of water are not available, air is a preferred alternative, which is in practice particularly easy to handle and effective, especially because of the fact that the drill according to the invention operates very quickly in comparison with the known drills, for which reason the necessary consumption of air becomes moderate on account of the shorter drilling time. - According to a particular embodiment of the drilling apparatus according to the invention it may be constructed in such a way that it is possible to take up coherent cores. The embodiment, which is shown in Figs. 2 and 3, comprises a front part of the drill 1 with the nozzles and the cutter head shown in Fig. 3, said front part being rotatable in relation to the remaining shaft of the drill, the front end of which is shown in Fig. 2. The two parts of the drill are connected along a dividing area acting as a valve for the control of the supply of drilling medium to the nozzles directed towards the center of the clear in the inner pipe.
- Fig. 2 shows an embodiment of the
joint surface 9 on the front part of the drill shaft. The joint surface comprises a pair of keyhole-shaped openings 10 engaging a corresponding pair of studs 11 placed on theend surface 12 of the drill shaft (Fig. 3) cooperating with the joint orabutment surface 9. The studs 11 have ahead 14, which may just pass through the enlargedpart 15 of theopenings 10. After insertion in theopenings 10, the studs are locked in the narrow part of theopenings 10 by means of setscrews 16. The studs 11 cannot pass the screws into the enlarged part, and the two parts of the drill are thereby safely connected. The dividingarea 9 furthermore comprises someholes 17 connected with ducts, which supply the inwards towards the inner of the drill directed nozzles with drilling medium. Theseholes 17 are placed in front ofholes 18 in theend surface 12 in such a way that theholes set screws 16. In the position, in which the nozzles directed towards the clear are closed, thehole 18 is positioned in front of thecircle 19 drawn in broken lines. The opening and the closing of the passages through the two set ofholes - As an alternative to the embodiment shown in Figs. 2 and 3, in which the two mutualy rotatable parts are in contact along a surface running perpendicular to the shaft of the drill, the contact surface may also be elaborated in other ways. In particular the contact surface may comprise one or more cylindrical or conical sections, which can guide the two parts radially in relation to each other. When constructing the contact surface with a cylindrical section the need for keyhole-shaped openings does not exist, as the two parts may be interlocked by means of one or more radially extending pins, which are displaceable in oblong holes extending along a part of the circumphery of the other part. The valve function is secured in a corresponding way through openings or recesses which are in line with one another in one of the angular positions, and which in the other position are displaced so much mutually that there is no passage between the holes. In both angular positions passage should be allowed through some of the pairs of holes which are connected to the nozzles placed in the end wall, said nozzles ejecting approximately axially directed jets of drilling medium into the interspaces between the cutting metal bits. These holes may have a suitable oblong shape which ensuring a suitable flow cross section in both positions, or they may be elaborated in such a way that the flow cross section is smallest when the remaining nozzles are blocked and the biggest pressure is available for overcoming the flow resistance.
Claims (2)
- Drilling apparatus, in particular for drilling of holes preferably in soil consisting essentially of glacier deposits or comparatively soft rocks, said drilling apparatus comprising a drilling pipe with a cutter head placed on the front end, the drilling pipe consisting of two coaxial pipes (2,3) forming an interspace (4), through which a drilling medium such as water or air can be introduced and removed together with chips from the drilling through the unobstructed clear of the inner pipe (3), the cutter head comprising a number of hard metal bits (5) and nozzles (6) in between, through which the drilling medium can flow under pressure, and furthermore a number of radially inwards directed nozzles (7) at a short distance from the cutter head and a number of ejector nozzles (8), which is directed obliquely inwards in a direction away from the cutter head,
characterized in that the drillling pipe comprises two coaxial pipe members, which are arranged in an end to end relationship and rotating with respect to each other through a predetermined angle, said pipe members being provided with abutment surfaces (9,12), which in one of the positions disconnect the supply of drilling medium to some of the nozzles and in the other position leave the passage open. - Drilling apparatus according to claim 1,
characterized in that the supply of drilling medium to both the ejector nozzles (8) and the radially directed nozzles (7) is disconnected in one of the positions.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK102891A DK169043B1 (en) | 1991-05-30 | 1991-05-30 | auger |
DK1028/91 | 1991-05-30 | ||
PCT/DK1992/000172 WO1992021849A1 (en) | 1991-05-30 | 1992-05-29 | Drilling apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0682738A1 EP0682738A1 (en) | 1995-11-22 |
EP0682738B1 true EP0682738B1 (en) | 1997-04-23 |
Family
ID=8100180
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92911558A Expired - Lifetime EP0682738B1 (en) | 1991-05-30 | 1992-05-29 | Drilling apparatus |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0682738B1 (en) |
AT (1) | ATE152211T1 (en) |
AU (1) | AU1921292A (en) |
DE (1) | DE69219368T2 (en) |
DK (2) | DK169043B1 (en) |
WO (1) | WO1992021849A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20308282U1 (en) * | 2003-04-03 | 2003-10-09 | Braun Alfons | Pneumatic suction pipe for taking up soil and suction excavator with such a suction pipe |
DE10319800A1 (en) * | 2003-04-30 | 2004-11-25 | Kleis, Simone | Hollow crown for core-drilling machine, has pipe with cutting elements arranged at front side along the propulsion direction, and a central fluid supply with its outlet set within the sphere of activity of the cutting elements |
AU2008205690B2 (en) * | 2008-08-15 | 2011-06-02 | Sandvik Intellectual Property Ab | Core drill bit |
CA2894422A1 (en) * | 2012-12-17 | 2014-06-26 | Groupe Fordia Inc. | Drill bit |
CN109209240A (en) * | 2018-11-06 | 2019-01-15 | 重庆交职院隧道装备技术有限公司 | A kind of brill toothing of drilling machine |
CN109209423A (en) * | 2018-11-06 | 2019-01-15 | 重庆交职院隧道装备技术有限公司 | A kind of independent gentle drilling pipe of intaking |
CN114183079A (en) * | 2021-11-15 | 2022-03-15 | 河南黄河旋风股份有限公司 | Drill barrel with water adding and slag discharging functions |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU467150B2 (en) * | 1970-04-03 | 1973-01-25 | United Geophysical Corp. | Improvements in and relating to drilling apparatus |
GB8309016D0 (en) * | 1983-03-31 | 1983-05-11 | British Ind Sand Ltd | Boring head |
GB8611091D0 (en) * | 1986-05-07 | 1986-06-11 | Ennis M S J | Borehole drill construction |
-
1991
- 1991-05-30 DK DK102891A patent/DK169043B1/en not_active IP Right Cessation
-
1992
- 1992-05-29 DK DK92911558.2T patent/DK0682738T3/en active
- 1992-05-29 AU AU19212/92A patent/AU1921292A/en not_active Abandoned
- 1992-05-29 EP EP92911558A patent/EP0682738B1/en not_active Expired - Lifetime
- 1992-05-29 AT AT92911558T patent/ATE152211T1/en not_active IP Right Cessation
- 1992-05-29 DE DE69219368T patent/DE69219368T2/en not_active Expired - Fee Related
- 1992-05-29 WO PCT/DK1992/000172 patent/WO1992021849A1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
DE69219368D1 (en) | 1997-05-28 |
DK102891D0 (en) | 1991-05-30 |
ATE152211T1 (en) | 1997-05-15 |
EP0682738A1 (en) | 1995-11-22 |
AU1921292A (en) | 1993-01-08 |
DE69219368T2 (en) | 1997-11-20 |
DK102891A (en) | 1992-12-01 |
WO1992021849A1 (en) | 1992-12-10 |
DK0682738T3 (en) | 1997-10-27 |
DK169043B1 (en) | 1994-08-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4185706A (en) | Rock bit with cavitating jet nozzles | |
US4436166A (en) | Downhole vortex generator and method | |
CA2030024C (en) | Hydraulic drilling apparatus and method | |
US4187921A (en) | Rock bit combination to enhance cuttings removal | |
US4531592A (en) | Jet nozzle | |
US5601153A (en) | Rock bit nozzle diffuser | |
US3461983A (en) | Cutting tool having hard insert in hole surrounded by hard facing | |
US4930586A (en) | Hydraulic drilling apparatus and method | |
US7188682B2 (en) | Multi-stage diffuser nozzle | |
US3958651A (en) | Vacuum, vacuum-pressure, or pressure circulation bit having jet-assisted vacuum | |
JPS63593A (en) | Fluid excavator and fluid excavation method | |
WO2004067908A1 (en) | Multi-cycle downhole tool with hydraulic damping | |
EP0682738B1 (en) | Drilling apparatus | |
US5669459A (en) | Nozzle retention system for rock bits | |
US6095261A (en) | Drill bit reverse circulation apparatus and method | |
US5407020A (en) | Pneumatic drilling chip removal system and method | |
CA1095502A (en) | Enhanced cross-flow with two jet drilling | |
JPS6157788A (en) | Cutter assembly | |
US4126194A (en) | Rock bit with extended pickup tube | |
US10760383B2 (en) | Fail-safe high velocity flow casing shoe | |
US4512420A (en) | Downhole vortex generator | |
US3414070A (en) | Jet drilling bit | |
US4359115A (en) | Novel rotary drill bits and drilling process | |
US5012876A (en) | Rotary drill bit providing separation of liquid from gas | |
JPS6043516B2 (en) | Body structure of rotary drill bit device and nozzle device for drilling fluid |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19931106 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
17Q | First examination report despatched |
Effective date: 19960717 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19970423 Ref country code: LI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19970423 Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 19970423 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19970423 Ref country code: FR Effective date: 19970423 Ref country code: ES Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19970423 Ref country code: CH Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19970423 Ref country code: BE Effective date: 19970423 Ref country code: AT Effective date: 19970423 |
|
REF | Corresponds to: |
Ref document number: 152211 Country of ref document: AT Date of ref document: 19970515 Kind code of ref document: T |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REF | Corresponds to: |
Ref document number: 69219368 Country of ref document: DE Date of ref document: 19970528 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19970529 |
|
EN | Fr: translation not filed | ||
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Effective date: 19971130 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: 732E |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DK Payment date: 20010503 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20010518 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20010521 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20010530 Year of fee payment: 10 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020529 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020530 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020531 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20021203 |
|
REG | Reference to a national code |
Ref country code: DK Ref legal event code: EBP |
|
EUG | Se: european patent has lapsed | ||
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20020529 |