EP4141213A1 - Bore bite and method for forming such a bore bite - Google Patents
Bore bite and method for forming such a bore bite Download PDFInfo
- Publication number
- EP4141213A1 EP4141213A1 EP21193475.7A EP21193475A EP4141213A1 EP 4141213 A1 EP4141213 A1 EP 4141213A1 EP 21193475 A EP21193475 A EP 21193475A EP 4141213 A1 EP4141213 A1 EP 4141213A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- studs
- base element
- drill
- casing shoe
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000003466 welding Methods 0.000 claims abstract description 25
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 239000010937 tungsten Substances 0.000 claims description 5
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 239000004567 concrete Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 229910001141 Ductile iron Inorganic materials 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910001060 Gray iron Inorganic materials 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000003801 milling Methods 0.000 description 1
- 239000011150 reinforced concrete 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
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/56—Button-type inserts
-
- 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
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
-
- 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
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/48—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type
Definitions
- the current invention relates to a tool comprising a base element and studs that are provided on the base element.
- the invention further relates to a method for forming such a tool and to a use of such a tool for forming secant walls.
- US10683630 discloses such a tool, which is made of cast iron and which is provided with studs.
- the tool comprises a cast structure with a tip body and several spiral-shaped ribs protruding from the tip body. Several studs are arranged to the ribs.
- the tip body, the ribs and the protrusions are made as a single-piece cast structure.
- one drills For secant walls, one drills first (odd) bores into which one pours concrete for forming first piles. After the concrete of the first piles is formed, one drills second (even) bores between the first piles, this using a casing shoe as a tool, which casing shoe is made of steel and is provided with studs. Such a casing shoe is also known as a crown drill. In these second bores one then adds reinforcement elements and pours concrete for forming second piles that form together with the first piles the secant wall.
- the object of increasing the lifespan of such a tool is achieved by providing a tool comprising a base element, which base element is a single-piece cast structure made of cast iron and comprising studs that are provided on the base element by welding.
- the studs of such a tool are preferably made of a composition comprising tungsten and/or tungsten carbide.
- Such studs are known and are used for being welded to steel. It also appears to be possible to weld such studs to cast structures made of cast iron. Surprisingly, those studs remain firmly attached to the cast structure, even in the case of e.g. drilling through concrete using such a tool, and this even through reinforced concrete.
- the cast iron of which the base element is formed is preferably ductile cast iron (GGG), which is also known as nodular cast iron. Instead, it is also possible to use grey cast iron (GG), which is also known as lamellar cast iron. Ductile cast iron is stronger than grey cast iron.
- GGG ductile cast iron
- GG grey cast iron
- the studs are provided on the base element by spot welding.
- spot welding of studs and more specifically spot welding of studs made of a composition comprising tungsten and/or tungsten carbide on the cast iron base element allows to obtain a strong fixation of the studs to the cast iron base element.
- Such studs are preferably spot welded to the base element using known welding machines for welding such studs, by placing the studs with the spot welding machine on the base element and by applying a current with this spot welding machine.
- the tool according to the invention is a drill tool.
- a drill tool can e.g. be a drill tip shaped similar to the ones as illustrated in US10683630 , US D845737 and US10640946 .
- such a drill tool can be a casing shoe.
- a casing shoe By welding studs to a cast iron base element of a casing shoe, it is now also possible to provide casing shoes with cast iron as material for the base element, which casing shoe can be used for forming secant walls.
- studs on a tool comprising a cast iron drum for milling material from a surface.
- a tool according to the invention is used to work a soil or a part, e.g. to drill into the soil or the part, or to remove material from the soil or the part.
- the studs of such a tool are preferably positioned so that they do not allow the cast iron to come into contact with the material of the soil or the part being worked with the tool.
- the studs are thus preferably provided at the end of the base element which in operation is in contact with the said material to be drilled or being drilled.
- the studs can more specifically be positioned both downward (axially) and sideways (outward) facing under an angle. Possibly, with e.g. casing shoes, studs can also be provided sideways (inwards) facing under an angle. The studs are positioned so that they do not allow the cast iron to come into contact with the said material in which one is drilling.
- the base element is at a first end provided to be connected to a driver, such as a drill pipe and the studs are provided on a distal end of the base element, opposite the first end.
- a driver such as a drill pipe and the studs are provided on a distal end of the base element, opposite the first end.
- a drill assembly comprising:
- the object of the invention is further achieved by providing a method for forming a tool comprising the following steps:
- the base element is preferably cast from ductile cast iron.
- studs are preferably chosen which are made of a composition comprising tungsten and/or tungsten carbide. Further in step b, the studs are preferably being welded using spot welding.
- the base element is provided with application surfaces for welding the studs thereto and between steps a and b, these application surfaces are finished for facilitating welding the studs to the application surfaces.
- the object of the invention is also achieved by using an above described drill tool and more specifically a casing shoe according to the invention for forming secant walls.
- the illustrated tool 11 is a casing shoe 1 for forming secant walls.
- a base element 2 is cast from cast iron as a single-piece cast structure, preferably from ductile cast iron.
- the base element 2 is mainly cylindrical and is provided with ribs 15 at its outer circumference.
- the base element 2 is provided to be connected to an end 10 of a drill pipe 7.
- an undercut 16 is therefore provided at the inner surface of the base element 2 via machining, e.g. via turning on a lathe.
- the drill pipe 7 is provided with a corresponding undercut 17 on its outer surface, for connecting the casing shoe 1 to the drill pipe 7.
- Connection holes 12 are drilled along the contour of the base element 2 for inserting a coupling element 13 therein.
- the drill pipe 7 is provided with corresponding connection holes 18, for inserting the coupling element 13 therein, for connecting the casing shoe 1 to the drill pipe 7.
- Alternative coupling systems are also possible for connecting such a casing shoe 1 to such a drill pipe 7.
- application surfaces 5, 6 are provided on the base element 2. After casting of the base element 2, these application surfaces 5, 6 are finished or machined, e.g. milled or grinded to finish these application surfaces 5, 6 for welding studs 3, 4 to the application surfaces 5, 6.
- First application surfaces 5 are provided downward at the distal end 9 of the base element 2 and first studs 3 are welded to the first application surfaces 5, extending axially with respect to the base element 2.
- Second application surfaces 6 are provided sideways, facing under and angle with respect to the first application surfaces 5.
- Second studs 4 are welded to the second application surfaces 6, extending sideways (outward) facing under an angle with respect to the first studs 3. Possibly, further studs can be provided sideways (inwards) facing under an angle with respect to the first studs 3.
- the studs 3, 4 of the illustrated casing shoe 1 are made of a composition comprising tungsten and/or tungsten carbide, but could also be made of any other suitable material.
- the studs 3, 4 are spot welded to base element 2 using a known welding machine for spot welding such studs 3, 4, by placing the studs 3, 4 with the welding machine on the corresponding application surfaces 5, 6 and applying a current with this welding machine.
- Alternative welding techniques are also possible to weld the studs 3, 4 to the cast iron base element 2.
- the illustrated casing shoe 1 can be loaded with a pushing force of approximately 20000 kg.
- the illustrated casing shoe 1 is more specifically suitable for forming secant walls, as illustrated in figures 5 to 7 .
- the casing shoe 1 forms part of a drill assembly 14 comprising the drill pipe 7 to which the casing shoe 1 is connected.
- the casing shoe 1 is provided to be connected to an end 10 of the drill pipe 7 and at a distal end 9, opposite to the first end 8 the casing shoe 1 is provided with studs 3, 4, so that the casing shoe 1 can be used as a drill tool.
- First (odd) bores are in this respect drilled into a soil 19, by using any suitable drill tool according to the invention, e.g. by using the illustrated casing shoe 1, and concrete is poured in these first bores for forming first piles 20, as illustrated in figure 5 .
- second (even) bores are drilled between the first piles 20, also using the casing shoe 1, as illustrated in figures 6 to 7 .
- reinforcement elements are then added and concrete is poured in these second bores for forming second piles that form together with the first piles 20 a secant wall.
- a tool 11 such as a drill tool comprising a cast iron base element 2 such as a drill tip similar to the ones as illustrated in US10683630 , US D845737 and US10640946 provided with studs 3, 4 for drilling holes, or make a tool 11 comprising a cast iron drum with studs 3, 4 for machining material from a surface.
- the illustrated studs 3, 4 can be known studs, e.g. used for being welded to steel. Alternatively to the illustrated studs 3, 4, such studs can also take many other forms or shapes, such as e.g. a form or shape as the protrusions illustrated in US10683630 .
Abstract
A tool (11) comprising a base element (2), which is a single-piece cast structure made of cast iron and comprising studs (3, 4) provided on the base element (2) by welding. The invention further relates to a method for forming such a tool and to the use of such a tool for forming secant walls.
Description
- The current invention relates to a tool comprising a base element and studs that are provided on the base element. The invention further relates to a method for forming such a tool and to a use of such a tool for forming secant walls.
-
US10683630 - For secant walls, one drills first (odd) bores into which one pours concrete for forming first piles. After the concrete of the first piles is formed, one drills second (even) bores between the first piles, this using a casing shoe as a tool, which casing shoe is made of steel and is provided with studs. Such a casing shoe is also known as a crown drill. In these second bores one then adds reinforcement elements and pours concrete for forming second piles that form together with the first piles the secant wall.
- It is an object of the current invention to increase the lifespan of a tool according to the invention. Further objects are to provide an improved method for forming such a tool and to improve the forming of secant walls.
- The object of increasing the lifespan of such a tool is achieved by providing a tool comprising a base element, which base element is a single-piece cast structure made of cast iron and comprising studs that are provided on the base element by welding.
- The studs of such a tool are preferably made of a composition comprising tungsten and/or tungsten carbide.
- Such studs are known and are used for being welded to steel. It also appears to be possible to weld such studs to cast structures made of cast iron. Surprisingly, those studs remain firmly attached to the cast structure, even in the case of e.g. drilling through concrete using such a tool, and this even through reinforced concrete.
- The cast iron of which the base element is formed, is preferably ductile cast iron (GGG), which is also known as nodular cast iron. Instead, it is also possible to use grey cast iron (GG), which is also known as lamellar cast iron. Ductile cast iron is stronger than grey cast iron.
- In a preferred embodiment, the studs are provided on the base element by spot welding.
- Surprisingly, spot welding of studs and more specifically spot welding of studs made of a composition comprising tungsten and/or tungsten carbide on the cast iron base element allows to obtain a strong fixation of the studs to the cast iron base element. Such studs are preferably spot welded to the base element using known welding machines for welding such studs, by placing the studs with the spot welding machine on the base element and by applying a current with this spot welding machine.
- In a specific embodiment, the tool according to the invention is a drill tool. Such a drill tool can e.g. be a drill tip shaped similar to the ones as illustrated in
US10683630 US D845737 andUS10640946 - Preferably, such a drill tool can be a casing shoe. By welding studs to a cast iron base element of a casing shoe, it is now also possible to provide casing shoes with cast iron as material for the base element, which casing shoe can be used for forming secant walls.
- In a further embodiment, it is e.g. also possible to provide studs on a tool comprising a cast iron drum for milling material from a surface.
- A tool according to the invention is used to work a soil or a part, e.g. to drill into the soil or the part, or to remove material from the soil or the part. The studs of such a tool are preferably positioned so that they do not allow the cast iron to come into contact with the material of the soil or the part being worked with the tool.
- When the tool is a drill tool, the studs are thus preferably provided at the end of the base element which in operation is in contact with the said material to be drilled or being drilled. The studs can more specifically be positioned both downward (axially) and sideways (outward) facing under an angle. Possibly, with e.g. casing shoes, studs can also be provided sideways (inwards) facing under an angle. The studs are positioned so that they do not allow the cast iron to come into contact with the said material in which one is drilling.
- In a preferred embodiment, the base element is at a first end provided to be connected to a driver, such as a drill pipe and the studs are provided on a distal end of the base element, opposite the first end.
- The object of the invention is further achieved by providing a drill assembly comprising:
- a drill pipe; and
- a drill tool according to the invention, which drill tool at a first end is provided to be connected to an end of the drill pipe and at a distal end, opposite to the first end is provided with studs.
- The object of the invention is further achieved by providing a method for forming a tool comprising the following steps:
- a. casting of a base element from cast iron as a single-piece cast structure; and
- b. welding of studs to the base element.
- Such a method results in an above described tool according to the invention, having the above described advantages.
- In step a, the base element is preferably cast from ductile cast iron. In step b, studs are preferably chosen which are made of a composition comprising tungsten and/or tungsten carbide. Further in step b, the studs are preferably being welded using spot welding.
- In a preferred method according to the invention, the base element is provided with application surfaces for welding the studs thereto and between steps a and b, these application surfaces are finished for facilitating welding the studs to the application surfaces.
- Finally, the object of the invention is also achieved by using an above described drill tool and more specifically a casing shoe according to the invention for forming secant walls.
- The present invention will now be explained in more detail by means of the following detailed description of a tool, a method for forming such a tool, a drill assembly comprising such a tool and a use of such a tool for forming a secant wall according to the invention. The sole aim of this description is to give explanatory examples and to indicate further advantages and particulars of the present invention, and can thus by no means be interpreted as a limitation of the area of application of the invention or of the patent rights defined in the claims.
- In this detailed description, reference numerals are used to refer to the attached drawings, in which in:
-
Fig. 1 shows a casing shoe according to the invention in perspective view; -
Fig. 2 shows a part of the casing shoe offigure 1 in more detail in perspective view at the height of some studs; -
Fig. 3 shows the casing shoe offigure 1 in view according to arrow F3 infigure 1 ; -
Fig. 4 shows the casing shoe offigure 1 in cross section, according to line AA infigure 3 , -
Fig. 5 schematically shows in perspective view an intermediate step of a method for forming a secant wall using a casing shoe according toFig. 1 , wherein two first bores are filled with concrete to form two first piles; -
Fig. 6 schematically shows in perspective view how using a casing shoe according toFig. 1 , when a second bore is drilled, between and partially through the first piles; -
Fig. 7 schematically shows in cross section how using a casing shoe according toFig. 1 , when a second bore is drilled, between and partially through the first piles. - The illustrated
tool 11 is acasing shoe 1 for forming secant walls. In order to form the illustratedcasing shoe 1, abase element 2 is cast from cast iron as a single-piece cast structure, preferably from ductile cast iron. Thebase element 2 is mainly cylindrical and is provided withribs 15 at its outer circumference. - As best seen in
Figs. 4 ,6 and7 , at afirst end 8, thebase element 2 is provided to be connected to anend 10 of adrill pipe 7. At thisfirst end 8, anundercut 16 is therefore provided at the inner surface of thebase element 2 via machining, e.g. via turning on a lathe. Thedrill pipe 7 is provided with acorresponding undercut 17 on its outer surface, for connecting thecasing shoe 1 to thedrill pipe 7. - Connection holes 12 are drilled along the contour of the
base element 2 for inserting acoupling element 13 therein. Thedrill pipe 7 is provided with corresponding connection holes 18, for inserting thecoupling element 13 therein, for connecting thecasing shoe 1 to thedrill pipe 7. Alternative coupling systems are also possible for connecting such acasing shoe 1 to such adrill pipe 7. - At a
distal end 9 of thebase element 2, opposite thefirst end 8, application surfaces 5, 6 are provided on thebase element 2. After casting of thebase element 2, these application surfaces 5, 6 are finished or machined, e.g. milled or grinded to finish these application surfaces 5, 6 forwelding studs - First application surfaces 5 are provided downward at the
distal end 9 of thebase element 2 andfirst studs 3 are welded to the first application surfaces 5, extending axially with respect to thebase element 2. Second application surfaces 6 are provided sideways, facing under and angle with respect to the first application surfaces 5.Second studs 4 are welded to the second application surfaces 6, extending sideways (outward) facing under an angle with respect to thefirst studs 3. Possibly, further studs can be provided sideways (inwards) facing under an angle with respect to thefirst studs 3. - The
studs casing shoe 1 are made of a composition comprising tungsten and/or tungsten carbide, but could also be made of any other suitable material. Thestuds base element 2 using a known welding machine for spot weldingsuch studs studs studs iron base element 2. - With a diameter of approximately 430 mm, the illustrated
casing shoe 1 can be loaded with a pushing force of approximately 20000 kg. - The illustrated
casing shoe 1 is more specifically suitable for forming secant walls, as illustrated infigures 5 to 7 . Thecasing shoe 1 forms part of adrill assembly 14 comprising thedrill pipe 7 to which thecasing shoe 1 is connected. At afirst end 8 thecasing shoe 1 is provided to be connected to anend 10 of thedrill pipe 7 and at adistal end 9, opposite to thefirst end 8 thecasing shoe 1 is provided withstuds casing shoe 1 can be used as a drill tool. - First (odd) bores are in this respect drilled into a
soil 19, by using any suitable drill tool according to the invention, e.g. by using the illustratedcasing shoe 1, and concrete is poured in these first bores for formingfirst piles 20, as illustrated infigure 5 . - Preferably while the concrete of the
first piles 20 is not fully cured, second (even) bores are drilled between thefirst piles 20, also using thecasing shoe 1, as illustrated infigures 6 to 7 . In these second bores reinforcement elements are then added and concrete is poured in these second bores for forming second piles that form together with the first piles 20 a secant wall. - Similar to how the illustrated
casing shoe 1 that comprises abase element 2 that is provided withstuds tool 11 such as a drill tool comprising a castiron base element 2 such as a drill tip similar to the ones as illustrated inUS10683630 US D845737 andUS10640946 studs tool 11 comprising a cast iron drum withstuds - The illustrated
studs studs US10683630
Claims (10)
- Tool (11) comprising a base element (2) and studs (3, 4) provided on the base element (2), characterised in that the base element (2) is a single-piece cast structure made of cast iron, and in that the studs (3, 4) are provided on the base element (2) by welding.
- Tool (11) according to claim 1, characterised in that the studs (3, 4) are made of a composition comprising tungsten and/or tungsten carbide.
- Tool (11) according to claim 1 or 2, characterised in that the studs (3, 4) are provided on the base element (2) by spot welding.
- Tool (11) according to any one of claims 1 to 3, characterised in that the tool (11) is a drill tool.
- Tool (11) according to claim 4, characterised in that the drill tool is a casing shoe (1).
- Drill assembly (14) comprising:- a drill pipe (7); and- a tool (11), which tool (11) at a first end (8) is provided to be connected to an end (10) of the drill pipe (7) and at a distal end (9), opposite to the first end (8) is provided with studs (3, 4);characterised in that the tool (11) is a drill tool according to claim 4 or 5.
- Method for forming a tool (11) according to any one of claims 1 to 5, characterised in that the method comprises the following steps:a. casting of the base element (2) from cast iron as a single-piece cast structure; andb. welding of studs (3, 4) to the base element (2).
- Method according to claim 7, characterised in that the base element (2) is provided with application surfaces (5, 6) for welding the studs (3, 4) to the application surfaces (5, 6) and in that between steps a and b, these application surfaces (5, 6) are finished for welding the studs (3, 4) to the application surfaces (5, 6).
- Use of a tool in a drilling assembly according to claim 6, characterized in that a tool (11) according to claim 4 or 5 is used for forming secant walls.
- Use of a tool according to claim 9, characterized in that the tool (11) is a casing shoe (1).
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21193475.7A EP4141213A1 (en) | 2021-08-27 | 2021-08-27 | Bore bite and method for forming such a bore bite |
US17/903,725 US20240076941A1 (en) | 2021-08-27 | 2022-09-06 | Tool with a base element and studs provided thereon and use of such tool for forming secant walls |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21193475.7A EP4141213A1 (en) | 2021-08-27 | 2021-08-27 | Bore bite and method for forming such a bore bite |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4141213A1 true EP4141213A1 (en) | 2023-03-01 |
Family
ID=77998671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21193475.7A Withdrawn EP4141213A1 (en) | 2021-08-27 | 2021-08-27 | Bore bite and method for forming such a bore bite |
Country Status (2)
Country | Link |
---|---|
US (1) | US20240076941A1 (en) |
EP (1) | EP4141213A1 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4499795A (en) * | 1983-09-23 | 1985-02-19 | Strata Bit Corporation | Method of drill bit manufacture |
US20050183892A1 (en) * | 2004-02-19 | 2005-08-25 | Oldham Jack T. | Casing and liner drilling bits, cutting elements therefor, and methods of use |
US20070079995A1 (en) * | 2004-02-19 | 2007-04-12 | Mcclain Eric E | Cutting elements configured for casing component drillout and earth boring drill bits including same |
US20150007505A1 (en) * | 2013-07-03 | 2015-01-08 | Diamond Products, Limited | Method of making diamond mining core drill bit and reamer |
USD845737S1 (en) | 2017-10-20 | 2019-04-16 | Proferro Nv | Tip for drill |
US10640946B2 (en) | 2016-03-15 | 2020-05-05 | Proferro Nv | Tip for a foundation pile |
US10683630B2 (en) | 2016-07-14 | 2020-06-16 | Proferro Nv | Tip with protrusions for a ground displacement operation for a foundation pile |
-
2021
- 2021-08-27 EP EP21193475.7A patent/EP4141213A1/en not_active Withdrawn
-
2022
- 2022-09-06 US US17/903,725 patent/US20240076941A1/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4499795A (en) * | 1983-09-23 | 1985-02-19 | Strata Bit Corporation | Method of drill bit manufacture |
US20050183892A1 (en) * | 2004-02-19 | 2005-08-25 | Oldham Jack T. | Casing and liner drilling bits, cutting elements therefor, and methods of use |
US20070079995A1 (en) * | 2004-02-19 | 2007-04-12 | Mcclain Eric E | Cutting elements configured for casing component drillout and earth boring drill bits including same |
US20150007505A1 (en) * | 2013-07-03 | 2015-01-08 | Diamond Products, Limited | Method of making diamond mining core drill bit and reamer |
US10640946B2 (en) | 2016-03-15 | 2020-05-05 | Proferro Nv | Tip for a foundation pile |
US10683630B2 (en) | 2016-07-14 | 2020-06-16 | Proferro Nv | Tip with protrusions for a ground displacement operation for a foundation pile |
USD845737S1 (en) | 2017-10-20 | 2019-04-16 | Proferro Nv | Tip for drill |
Also Published As
Publication number | Publication date |
---|---|
US20240076941A1 (en) | 2024-03-07 |
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