FI127218B - Centering drill bit - Google Patents

Centering drill bit Download PDF

Info

Publication number
FI127218B
FI127218B FI20165881A FI20165881A FI127218B FI 127218 B FI127218 B FI 127218B FI 20165881 A FI20165881 A FI 20165881A FI 20165881 A FI20165881 A FI 20165881A FI 127218 B FI127218 B FI 127218B
Authority
FI
Finland
Prior art keywords
base
drill bit
blades
transverse
plane
Prior art date
Application number
FI20165881A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI20165881A (en
Inventor
Mika Lokkinen
Original Assignee
Innotia Eesti Oü
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Innotia Eesti Oü filed Critical Innotia Eesti Oü
Priority to FI20165881A priority Critical patent/FI127218B/en
Application granted granted Critical
Publication of FI127218B publication Critical patent/FI127218B/en
Publication of FI20165881A publication Critical patent/FI20165881A/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/18—Appliances for use in repairing pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/40—Single-purpose machines or devices for grinding tubes internally
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F9/00—Arrangements or fixed installations methods or devices for cleaning or clearing sewer pipes, e.g. by flushing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Earth Drilling (AREA)

Abstract

Keksintö koskee porakärkeä, jossa on alustaan (10) kiinnitettyjä teriä (20) siten, että terät (20) määrittävät kolmion muodon, joka työntyy esiin alustasta (10). Terät (20) ulottuvat alustan reunasta alustan keskustaan. Terät nousevat askeleittain portaiden tapaan alustan reunalta alkaen sekä alustan reunan ja alustan keskustan välissä terät laskevat lineaarisesti kohden alustaa muodostaen leikkuureunoja (31,32, 33, 35) terien (20) sivupinnan (24) kanssa.The invention relates to a drill bit having blades attached to a base (10) (20) such that the blades (20) define a triangular shape that protrudes raised from the substrate (10). The blades (20) extend from the edge of the base to the base center. The blades rise step by step, just like the stairs from the edge and between the edge of the tray and the center of the tray the blades fall linearly towards the substrate forming cutting edges (31,32, 33, 35) with the side surface (24) of the blades (20).

Description

Centralizing drill head
FIELD OF THE INVENTION
The present invention relates to a drill head, and particularly to a centralizing drill head for removing a collapsed liner and other obstacles inside a pipe.
BACKGROUND OF THE INVENTION
Installed pipelines in buildings and underground can be rehabilitated without opening structures or digging the ground. The trenchless rehabilitation allows a quick and durable rehabilitation of pipes within buildings and underground pipelines. A resin impregnated liner is installed in a pipe with an inversion drum using air pressure to invert the liner into the pipe. Once the liner is installed air pressure is maintained on an elevated level until the resin within the liner settles and the liner forms a rigid pipe against the inner surface of the old pipe. A drop in air pressure inside the pipe during a settling period may cause collapse of the liner which blocks or at least severely restricts the flow of fluids in the pipe. Once the collapsed liner has settled inside the pipe it can only be removed by mechanically sanding or grinding the collapsed liner into small fragments which can then be removed from the pipe.
Grinding tools of the prior art for collapsed liner removal are conical, flat or spherical in shape of cutting surface. The conical and spherical shaped grinding tools are sensitive to shape of the collapsed liner and a pointy, conical or a wedge shaped face of the collapsed liner often diverts the grinding tool against the inner surface of the pipe instead of grinding the liner. This slows down the removal process and may damage the pipe or the grinding tool. Grinding tools with flat cutting surface are insensitive to the shape of the collapsed liner but the flat grinding tools penetrate very slowly into a collapsed liner that fills most of the pipe since the contact area between the cutters and the collapsed liner is large.
In a Youtube video published 5.3.2015, titled “The Picote Smart Cutter is an intelligent option” (https://www.youtube.com/watch?v=bXZ4a0irdoo) a non-centralizing drill head is disclosed in a still frame at 0:47 min.
In a Youtube video published 7.3.2014, titled “Picote Products” (https://www.youtube.com/watch?v=vSToDDuygwI) another non-centralizing drill head is disclosed in a still frame at 0:34 min.
A PCT application W02013072567A1 discloses a device for removing pipe renovation material from pipe. The operation of the disclosed device is based
20165881 prh 17-10-2017 on bouncing of the device inside a pipe.
A PCT application W02016156668A1 discloses a device for cleaning inner surface of a pipe.
One of the problems associated with the above arrangement is that it 5 is tedious and hard work to remove collapsed liners from pipes and a selection of different tools are needed. The removal work may take several weeks to finish for a long pipe and grinding tools may have to be changed often as the shape of a collapsed liner can change along the pipe. This causes significant delays and additional expenses to a rehabilitation project.
BRIEF DESCRIPTION OF THE INVENTION
An object of the present invention is to provide a centralizing drill head which significantly speeds up the removal of a collapsed liner and is suitable for various shapes of collapsed liners and other hard blockages from a pipe.
The present invention is based on the idea of providing a drill head having cutters fixed on a base in such a way that the cutters define a triangular shape protruding from the base. The cutters extend from periphery of the base to the centre of the base. The cutters ascend step-by-step like stairs from the periphery of the base and between the periphery and the centre of the base the cutters descend towards the base in linear slope. The tips of the cutters outermost from the base are between the periphery and the centre of the base.
An advantage of the arrangement of the present invention is that the drill head is insensitive to irregularities and shape of the material to be ground so it does not seek its way in a certain direction as is done by e.g. a conical drill bit when facing an irregular surface. The drill head also penetrates easily into a flat surface as only a small surface area is in contact with a flat surface resulting a high surface pressure unlike with grinding tools with a flat or planar cutting surface.
BRIEF DESCRIPTION OF THE DRAWINGS
In the following the present invention is described in greater detail by means of preferred embodiments with reference to the accompanying drawings, in which
Figure 1 illustrates a drill head according to an embodiment of the present invention attached to a rotatable body.
20165881 prh 17-10-2017
DETAILED DESCRIPTION OF THE INVENTION
Figure 1 is illustrates a drill head according to an embodiment of the present invention. The drill head can be used in pipe rehabilitation work to remove obstacles and unwanted material, especially a collapsed liner, from a pipe.
The drill head can be attached to a body 40 with bolts 12 through apertures 11 in the base 10 of the drill head. The body has an aperture or recess for a drive shaft. The drive shaft can be secured with set screws tightened against the drive shaft through threaded holes 41 in the body. Rotation of the drive shaft rotates the body 40 and the drill head attached to the body.
The drill head comprises a base 10 that is preferably a flat and round disc having a thickness of 3 to 30 millimeters. Also discs shaped as regular polygons can be used instead of round discs. The base 10 defines a periphery which can be e.g. a circle or a regular polygon. The base also defines a first plane and preferably the periphery of the base is located on the first plane. The first plane is preferably also transverse to the intended rotation axis of the drill head. The base also has apertures 11 for securing the drill head to a body 40.
The drill head further comprises multiple cutters 20, preferably four of them but also three, six or eight cutters, or any number between two and ten cutters can be used. Each of these cutters 20 comprise multiple transverse surfaces 22 defining planes that intersect the first plane within the periphery of the base 10. The term 'transverse surface’ should not be understood as a term of mathematics or geometry as such, but as a name that helps to visualize and comprehend the structure of the cutters. Transverse surfaces may or may not be transverse to the base. A term 'first surface’ could be used instead of the term 'transverse surface’.
Each of the cutters 20 comprise multiple parallel surfaces 23 defining planes that intersect the planes defined by the multiple transverse surfaces 22 within the periphery of the base 10. The term 'parallel surface’ should not be understood as a term of mathematics or geometry as such, but as a name that helps to visualize and comprehend the structure of the cutters. Parallel surfaces may or may not be parallel with the base. A term 'second surface’ could be used instead of the term 'parallel surface’.
Each of the cutters 20 also comprise two side surfaces 24 defining two planes, one plane each, which intersect the first plane, and the planes defined by the multiple transverse surfaces 22 and the planes defined by the multiple parallel surfaces 23 within the periphery of the base 10. The term 'within the
20165881 prh 17-10-2017 periphery of the base’ should be understood to mean a space delimited by the periphery of the base or a projection of the periphery onto the first plane extending in direction transverse to the first plane.
Each of the cutters 20 also comprise a centralizing surface 25 defining 5 a plane which intersects the first plane, the planes defined by the multiple transverse surfaces 22, the planes defined by the multiple parallel surfaces 23, and the two planes defined by the two side surfaces within the periphery of the base 10.
In an embodiment the multiple transverse surfaces 22 of the cutter 20 10 form multiple transverse cutting edges 32 with the a side surface 24 and the multiple parallel surfaces 23 of the cutter 20 form multiple parallel cutting edges 33 with said side surface 24. The drill head is manufactured, e.g. machined, so that the cutting edges are sharp and preferably an angle of 80 to 130 degrees is formed between surfaces that form a cutting edge.
In an embodiment the centralizing surface 25 forms a centralizing cutting edge 35 with said side surface 24. The centralizing cutting edge 35 is preferably inclined so that the centralizing cutting edge 35 is further away from the first plane at an end closer to the periphery of the base 10 than at the opposite end of the centralizing cutting edge 35 that is closer to the centre of the base 10.
Preferably the centralizing cutting edge 35 is along a straight line descending towards the centre of the base 10 and ascending away from the base towards the periphery of the base 10. This line may or may not intersect the rotation axis of the drill head which rotation axis is normal to the first plane at the centre of the base.
In an embodiment, along a line from the periphery of the base 10 towards the centre of the base 10, each consecutive parallel surface 23 in each of the multiple cutters 20 is further away from the first plane than the previous one. The structure resembles steps of stairs.
In an embodiment, along the line from the periphery of the base 10 towards the centre of the base 10, two consecutive parallel surfaces 23 are connected with a transverse surface 22 forming edges 34 between the two consecutive parallel surfaces 23 and the connecting transverse surface 22. In an embodiment each of the multiple cutters 20 comprises at least two transverse surfaces 22 and at least three parallel surfaces 23.
In an embodiment, for each of the multiple cutters 20, the planes defined by the multiple transverse surfaces 22 do not intersect each other within the periphery of the base 10. In other words the transverse surfaces have the same or almost the same inclination compared to the first plane.
In an embodiment, for each of the multiple cutters 20, the planes defined by the multiple parallel surfaces 23 do not intersect each other within the periphery of the base 10. In other words the parallel surfaces have the same or almost the same inclination compared to the first plane.
In an embodiment each of the multiple cutters 20 comprises an outer surface 21 that intersects with the first plane outside the periphery of the base 10 and the outer surface 21 forms a cutting edge 31 with a side surface 24. This cutting edge is located outside the periphery of the base 10 and it ensures that the drill head is grinding or drilling a large enough hole to fit the base 10 and the body 40 into the hole. The cutting edge 31 outside the perimeter of the base 10 also facilitates moving of the drill head in the hole it has grinded or drilled as there will be a clearance between the body and the walls of the drilled or ground hole.
The drill head is preferably made out of steel or some other metal and heat treated for increasing hardness of the cutters.
It will be obvious to a person skilled in the art that, as the technology advances, that the inventive concept can be implemented in various ways. The present invention and its embodiments are not limited to the examples described above but may vary within the scope of the claims.

Claims (9)

1. Porakärki romahtaneen saneeraussukan poistamiseksi putkesta, joka porakärki käsittää alustan (10), joka määrittelee ulkokehän ja ensimmäisen tason, ja jossa alustassa on aukkoja (11) porakärjen kiinnittämiseksi runkoonA drill bit for removing a collapsed re-stocking tube from a tube, the drill bit comprising a base (10) defining an outer periphery and a first plane, and having a hole (11) for attaching the drill bit to the body. 5 (40), joka porakärki käsittää lisäksi useita teriä (20), missä kukin useista teristä (20) käsittää useita poikittaisia pintoja (22), jotka määrittelevät tasoja, jotka leikkaavat ensimmäisen tason alustan (10) ulkokehän sisällä, useita yhdensuuntaisia pintoja (23), jotka määrittelevät tasoja, jotka 10 leikkaavat useiden poikittaisten pintojen (22) määrittelemät tasot alustan (10) ulkokehän sisällä, ja kaksi sivupintaa (24), jotka määrittävät kaksi tasoa, jotka leikkaavat ensimmäisen tason, ja useiden poikittaisten pintojen (22) määrittämät tasot ja useiden yhdensuuntaisten pintojen (23) määrittämät tasot alustan (10)5 (40), the drill bit further comprising a plurality of blades (20), each of the plurality of blades (20) comprising a plurality of transverse surfaces (22) defining planes which intersect the first plane of the base (10) within a peripheral surface; ) defining planes 10 intersecting planes defined by a plurality of transverse surfaces (22) within the outer periphery of the base (10) and two side surfaces (24) defining two planes intersecting the first plane and planes defined by a plurality of transverse surfaces (22) and planes defined by a plurality of parallel surfaces (23) on the substrate (10) 15 ulkokehän sisällä, tunnettu siitä, että kukin useita teristä (20) lisäksi käsittää keskittävän pinnan (25), joka määrittää tason, joka leikkaa ensimmäisen tason, useiden poikittaisten pintojen (22) määrittämät tasot, useiden yhdensuuntaisten pintojen (23) määrittämät tasot, ja kahden sivupinnan määrittämät kaksi tasoa15, characterized in that each of a plurality of blades (20) further comprises a centering surface (25) defining a plane intersecting the first plane, planes defined by a plurality of transverse surfaces (22), and planes defined by a plurality of parallel surfaces (23), and two levels defined by two side surfaces 20 alustan (10) ulkokehän sisällä.20 inside the periphery of the base (10). 2. Patenttivaatimuksen 1 mukainen porakärki, tunnettu siitä, että terän (20) useat poikittaiset pinnat (22) muodostavat useita poikittaisia leikkuureunoja (32) sivupinnan (24) kanssa ja useat yhdensuuntaiset pinnat (23) muodostavat useita yhdensuuntaisia leikkuureunoja (33) mainitun sivupinnanA drill bit according to claim 1, characterized in that the plurality of transverse cutting surfaces (22) form a plurality of transverse cutting edges (32) with a side surface (24) and the plurality of parallel surfaces (23) form a plurality of parallel cutting edges (33) 25 (24) kanssa.25 (24). 3. Patenttivaatimuksen 2 mukainen porakärki, tunnettu siitä, että keskittävä pinta (25) muodostaa keskittävän leikkuureunan (35) mainitun sivupinnan (24) kanssa, missä keskittävä leikkuureuna (35) on kallistettu siten, että keskittävä leikkuureuna (35) on kauempana ensimmäisestä tasosta siinäA drill bit according to claim 2, characterized in that the centering surface (25) forms a centering cutting edge (35) with said side surface (24), wherein the centering cutting edge (35) is inclined so that the centering cutting edge (35) is 30 päässä, joka on lähempänä alustan (10) ulkokehää kuin keskittävän leikkuureunan (35) vastakkainen pää, joka on lähempänä alustan (10) keskikohtaa.30, which is closer to the periphery of the base (10) than the opposite end of the centering cutting edge (35), which is closer to the center of the base (10). 4. Patenttivaatimuksen 3 mukainen porakärki, tunnettu siitä, että linjalla alustan (10) ulkokehän kohden alustan (10) keskikohtaa, kunkin useanDrill bit according to claim 3, characterized in that the line (10) on the outer circumference of the base (10) towards the center of the base (10), 35 terän (20), kukin perättäinen yhdensuuntainen pinta (23) on edellistä kauempana ensimmäisestä tasosta.With 35 blades (20), each successive parallel surface (23) is further away from the first plane. 5. Patenttivaatimuksen 4 mukainen porakärki, tunnettu siitä, että linjalla alustan (10) ulkokehän kohden alustan (10) keskikohtaa, kahta perättäistä yhdensuuntainen pintaa (23) yhdistää poikittainen pinta (22) muodostaen reunoja (34) näiden kahden perättäisen yhdensuuntaisen pinnan (23) ja yhdistävän poikittaisen pinnan (22) välille.Drill bit according to Claim 4, characterized in that the transverse surface (22) is joined by a transverse surface (22) on the line perpendicular to the periphery of the base (10) towards the center of the base (10) to form edges (34). and a connecting transverse surface (22). 55 6. Jonkin patenttivaatimuksista 1-5 mukainen porakärki, tunnettu siitä, että kullekin useista teristä (20) pätee, että useiden poikittaisten pintojen (22) määrittämät tasot eivät leikkaa toisiaan alustan (10) ulkokehän sisällä.Drill bit according to one of Claims 1 to 5, characterized in that for each of the plurality of blades (20), the planes defined by the plurality of transverse surfaces (22) do not intersect within the outer periphery of the base (10). 7. Jonkin patenttivaatimuksista 1-6 mukainen porakärki, tunnettu siitä, että kullekin useista teristä (20) pätee, että useiden yhdensuuntaistenDrill bit according to one of Claims 1 to 6, characterized in that for each of the plurality of blades (20) it is 10 pintojen (23) määrittämät tasot eivät leikkaa toisiaan alustan (10) ulkokehän sisällä.The planes defined by the surfaces (23) do not intersect within the outer periphery of the base (10). 8. Jonkin patenttivaatimuksista 1-7 mukainen porakärki, tunnettu siitä, että kukin useista teristä (20) käsittää ulkopinnan (21), joka leikkaa ensimmäisen tason alustan (10) ulkokehän ulkopuolella ja ulkopinta (21)Drill bit according to one of Claims 1 to 7, characterized in that each of the plurality of blades (20) comprises an outer surface (21) which cuts the outer surface of the first level base (10) and an outer surface (21). 15 muodostaa leikkuureunan (31) sivupinnan (24) kanssa.15 forms a cutting edge (31) with a side surface (24). 9. Jonkin patenttivaatimuksista 1-8 mukainen porakärki, tunnettu siitä, että kukin useista teristä (20) käsittää ainakin kaksi poikittaista pintaa (22) ja ainakin kolme yhdensuuntaista pintaa (23).Drill bit according to one of Claims 1 to 8, characterized in that each of the plurality of blades (20) comprises at least two transverse surfaces (22) and at least three parallel surfaces (23).
FI20165881A 2016-11-22 2016-11-22 Centering drill bit FI127218B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI20165881A FI127218B (en) 2016-11-22 2016-11-22 Centering drill bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20165881A FI127218B (en) 2016-11-22 2016-11-22 Centering drill bit

Publications (2)

Publication Number Publication Date
FI127218B true FI127218B (en) 2018-01-31
FI20165881A FI20165881A (en) 2018-01-31

Family

ID=61009225

Family Applications (1)

Application Number Title Priority Date Filing Date
FI20165881A FI127218B (en) 2016-11-22 2016-11-22 Centering drill bit

Country Status (1)

Country Link
FI (1) FI127218B (en)

Also Published As

Publication number Publication date
FI20165881A (en) 2018-01-31

Similar Documents

Publication Publication Date Title
KR20180008399A (en) A cutting element configured to mitigate diamond table breakage, a ground drilling tool comprising such a cutting element, and a related method
US11708726B2 (en) Horizontal directional reaming
GB2581668A (en) Earth-boring tools having a gauge insert configured for reduced bit walk and method of drilling with same
US9506471B2 (en) Radial bearing assembly for centrifugal pump
FI127218B (en) Centering drill bit
US11123843B2 (en) Depth adjustable hub for use with abrasive grinding tool
JP2019137056A (en) Cutting accessory for electric power tool
US20190032419A1 (en) Optimization of rolling elements on drill bits
JP2007313637A (en) Rotary tool for machining surface
AU2019279892B2 (en) Horizontal directional reaming
US20150021099A1 (en) Cutting members with integrated abrasive elements
EP3013518B1 (en) Cutting blade with regenerating edge segments
CN110546345B (en) Earth-boring tools with reduced vibrational response and related methods
JP2014065134A (en) Cutter for lathe-turning apparatus
US20140017021A1 (en) Apparatus for removing retainer material
RU2008110524A (en) DRILL BIT
KR102031741B1 (en) Grinding wheel
CN101474828A (en) Abrasive coated bit
US12031383B2 (en) Shaped cutter arrangements
US20170361417A1 (en) Grinding device
US9151120B2 (en) Face stabilized downhole cutting tool
JP3163059B2 (en) Saw blade for joint cutting and joint cutting method
JP2020026014A (en) Cutter for turning device
RU34620U1 (en) MILLER
JP2003313810A (en) Road cutting multi-wheel

Legal Events

Date Code Title Description
FG Patent granted

Ref document number: 127218

Country of ref document: FI

Kind code of ref document: B

MM Patent lapsed