WO2009148322A1 - Rock drilling device - Google Patents

Rock drilling device Download PDF

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Publication number
WO2009148322A1
WO2009148322A1 PCT/NO2009/000200 NO2009000200W WO2009148322A1 WO 2009148322 A1 WO2009148322 A1 WO 2009148322A1 NO 2009000200 W NO2009000200 W NO 2009000200W WO 2009148322 A1 WO2009148322 A1 WO 2009148322A1
Authority
WO
WIPO (PCT)
Prior art keywords
anchor
string portion
support shoe
borehole
support
Prior art date
Application number
PCT/NO2009/000200
Other languages
French (fr)
Inventor
Per Olav Haughom
Sigurd Kjell Haughom
Original Assignee
Norwegian Hard Rock Drilling As
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 Norwegian Hard Rock Drilling As filed Critical Norwegian Hard Rock Drilling As
Priority to EP09758569.9A priority Critical patent/EP2350420B1/en
Publication of WO2009148322A1 publication Critical patent/WO2009148322A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/18—Anchoring or feeding in the borehole
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D3/00—Raising shafts, i.e. working upwards from the bottom

Definitions

  • This invention relates to a rock drilling machine. More particularly it concerns a rock drilling machine for drilling of boreholes in rock where the rock drilling machine comprises a drilling portion and a string portion which by- means of joinable pipes are connected to a support device on the outside of the borehole.
  • support device is in this context meant an equipment positioned at the opening of the borehole and which is arranged to at least being able to displace a string portion in the borehole or to rotate the string portion about its central axis, or be provided with equipment for control and energy supply to the drilling portion and the string portion.
  • the axial displacement force must be able to overcome the force needed to displace the string portion and the drilling portion themselves in the borehole and in addition apply to the drilling portion drill bit sufficient axial force for cutting progress to take place.
  • a considerable share of the drilling portion and string portion weights are transmitted to the support device.
  • the object of the invention is to remedy or reduce at least one of the prior art drawbacks .
  • rock drilling machine for drilling of boreholes in rock
  • the rock drilling machine comprises a drilling portion and a string portion which by means of joinable pipes are connected to a support device on the outside of the borehole
  • the rock drilling machine in accordance with the invention is characterised in that the string portion is provided with an anchor comprising at least one against the borehole preloadable and relative to the string portion axially displaceable support shoe.
  • the anchor may also transfer axial forces between the string portion and the borehole wall.
  • the support shoe may be hydraulically displaceable between a retracted non-active position and an extended active position where the support shoe abuts the borehole wall. Hydraulic preloading of the support shoe is preferable for among other things to be able to compensate for unintentional displace- ment between the support shoe and the borehole wall .
  • Other forms of actuators, such as electrical, may in some cases be appropriate .
  • a mechanical interconnection of the support shoes may be appropriate to ensure that the support shoes are displaced synchronously.
  • the support shoes may for example be connected to a common cylinder or they may be interlocked by means of linkages.
  • the support shoe may be connected to the anchor housing of the anchor by means of a first link and to a hydraulic cylinder by means of a second link.
  • a displacement of the piston rod in the hydraulic cylinder relative to the cylinder housing of the hydraulic cylinder causes the support shoe to be displaced radially relative to the string portion.
  • the support shoe may abut the anchor via an in relation to the string portion longitudinal axis inclined abutment.
  • the support shoe is displaced radially by displacing the support shoe along the abutment.
  • the support shoe may in a further embodiment be connected to the anchor by means of a radially directed cylinder.
  • the support shoe may be hydraulically axially displaceable relative to the string portion. Typically is the anchor displaced axially along the string portion together with the support shoe .
  • the anchor may thus comprise a feeding cylinder connected between the string portion and the anchor in axial direction relative to the string portion.
  • the mode of operation of the anchor is explained in the particular part of the description.
  • Multiple independent displaceable anchors may be connected to the string portion.
  • the positioning of the anchor relative to the drill bit may be adapted according to the type of drill string being used. If the drilling portion comprises a drive motor at the drill bit, then the anchor is normally arranged on the opposite side of the drive motor relative to the drill bit.
  • An anchor according to the invention being connected to a string portion contributes to be able to displace the string portion having a considerable weight in a borehole.
  • the invention also arranges to apply an axial drilling force from the anchor and to the drill bit and to be able to pull the whole string portion in the borehole.
  • Fig. 1 shows a drilling portion and a string portion of a rock drilling machine in a borehole
  • Fig. 2 shows partly in section and in a larger scale an anchor that is connected to a string portion where the anchor is in an inactive position;
  • Fig. 3 shows the same as Fig. 2, but with the anchor in an active position.
  • the reference numeral 1 indicates a rock drilling machine working in a borehole 2.
  • the rock drilling machine 1 comprises a drilling portion 4 and a string portion 6 where the string portion 6 is provided with an anchor 8.
  • the drilling portion 4 comprises in this embodiment a drill bit 10, a gear 12 and a drive motor 14.
  • the string portion 6 comprises a hydraulic section 16 and an electric section 18.
  • the anchor 8 see Figs. 2 and 3, comprises an anchor housing 24 which surrounds a guide pipe 26.
  • the guide pipe 26 forms a part of the string portion and has advantageously a cornered cross-section, generally square as in the embodiment shown.
  • the anchor housing 24 being provided with bearing material 28 abutting the guide pipe 26 is axially displaceable along the guide pipe .
  • the anchor 8 comprises four support shoes 30 distributed about the longitudinal axis 32 of the string portion 6.
  • Each support shoe 30 is by means of a first link 34 connected to the anchor housing 24 where the first link 34 is pivotally supported in a housing bracket 36.
  • the first link 34 is connected to the support shoe 30 by means of a shaft 38.
  • a second link 40 is pivotally connected to the support shoe 32 in the shaft 38.
  • the second link 40 is in its opposite end portion pivotally connected to a piston rod 44 of a hydraulic cylinder 42, and to a sliding attachment 46 which is displaceable relative to the anchor housing 24.
  • a hydraulic feed cylinder 48 is positioned within the guide pipe 26.
  • the feed cylinder 48 is connected to the string portion by means of piston rod attachment 50 and to the anchor 8 by means of a cylinder attachment 52 extending through longitudinal slots 54 in the guide pipe 26.
  • the cylinder attachment 52 is bolted to the anchor housing 24 by means of brackets 56. The cylinder attachment 52 is thus axially displaceable in the slots 54.
  • the anchor 8 is in Fig. 2 shown in a position where the anchor 8 is in one of its end positions relative to the string portion 6.
  • the support shoes 30 are retracted to their inactive positions.
  • the feed cylinder 48 displaces in its minus stroke the anchor 8 along the guide pipe 26 toward the other end position for the anchor 8, see Fig. 3.
  • the hydraulic cylinder 42 displaces the sliding attachment 46 in a direction toward the housing bracket 36.
  • the first and the second links 34, 40 thereby cause the support shoe 30 to be displaced radially outward and be preloaded against the wall of the borehole 2.
  • hoses and cables for control and power supply are not shown, but are connected to not shown equipment in the hydraulic section 16 and the electric section 18.
  • the exemplary embodiment in Figs. 2 and 3 show a somewhat simplified anchor 8 compared to the anchor 8 in Fig. 1, as all support shoes 30 in Fig. 1 are connected to a common ring cylinder 58.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Earth Drilling (AREA)

Abstract

A device for a rock drilling machine (1) for drilling of boreholes (2) in rock, where the rock drilling machine (1) comprises a drilling portion (4) and a string portion (6) which by means of joinable pipes (20) are connected to a support device on the outside of the borehole (2), and where the string portion (6) is provided with an anchor (8) comprising at least one against the borehole (2) preloadable and relative to the string portion (6) axially displaceable support shoe (30).

Description

ROCK DRILLING DEVICE
This invention relates to a rock drilling machine. More particularly it concerns a rock drilling machine for drilling of boreholes in rock where the rock drilling machine comprises a drilling portion and a string portion which by- means of joinable pipes are connected to a support device on the outside of the borehole.
During drilling in rock is a drilling portion connected to a drill string running through a borehole and to a support device on the outside of the borehole. To achieve cutting progress it is necessary to displace the drill string inward in the borehole with a considerable force.
By support device is in this context meant an equipment positioned at the opening of the borehole and which is arranged to at least being able to displace a string portion in the borehole or to rotate the string portion about its central axis, or be provided with equipment for control and energy supply to the drilling portion and the string portion.
The axial displacement force must be able to overcome the force needed to displace the string portion and the drilling portion themselves in the borehole and in addition apply to the drilling portion drill bit sufficient axial force for cutting progress to take place. At drilling from a lower portion and for example to the bottom of a higher situated reservoir where at least a part of the borehole may take up an approximately vertical direction, a considerable share of the drilling portion and string portion weights are transmitted to the support device.
It has turned out that the necessary axial force in the string portion may limit the length of borehole that can be drilled by means of prior art drilling devices.
The object of the invention is to remedy or reduce at least one of the prior art drawbacks .
The object is achieved according to the invention by the features stated in the below description and in the following claims .
There is provided a rock drilling machine for drilling of boreholes in rock where the rock drilling machine comprises a drilling portion and a string portion which by means of joinable pipes are connected to a support device on the outside of the borehole, and where the rock drilling machine in accordance with the invention is characterised in that the string portion is provided with an anchor comprising at least one against the borehole preloadable and relative to the string portion axially displaceable support shoe.
Apart from supporting the string portion radially in the borehole, the anchor may also transfer axial forces between the string portion and the borehole wall.
The support shoe may be hydraulically displaceable between a retracted non-active position and an extended active position where the support shoe abuts the borehole wall. Hydraulic preloading of the support shoe is preferable for among other things to be able to compensate for unintentional displace- ment between the support shoe and the borehole wall . Other forms of actuators, such as electrical, may in some cases be appropriate .
When more support shoes are distributed about the string portion's longitudinal axis, a mechanical interconnection of the support shoes may be appropriate to ensure that the support shoes are displaced synchronously. The support shoes may for example be connected to a common cylinder or they may be interlocked by means of linkages.
The support shoe may be connected to the anchor housing of the anchor by means of a first link and to a hydraulic cylinder by means of a second link. A displacement of the piston rod in the hydraulic cylinder relative to the cylinder housing of the hydraulic cylinder causes the support shoe to be displaced radially relative to the string portion.
In another embodiment the support shoe may abut the anchor via an in relation to the string portion longitudinal axis inclined abutment. The support shoe is displaced radially by displacing the support shoe along the abutment.
The support shoe may in a further embodiment be connected to the anchor by means of a radially directed cylinder.
The support shoe may be hydraulically axially displaceable relative to the string portion. Typically is the anchor displaced axially along the string portion together with the support shoe .
The anchor may thus comprise a feeding cylinder connected between the string portion and the anchor in axial direction relative to the string portion. The mode of operation of the anchor is explained in the particular part of the description.
Multiple independent displaceable anchors may be connected to the string portion. The positioning of the anchor relative to the drill bit may be adapted according to the type of drill string being used. If the drilling portion comprises a drive motor at the drill bit, then the anchor is normally arranged on the opposite side of the drive motor relative to the drill bit.
An anchor according to the invention being connected to a string portion contributes to be able to displace the string portion having a considerable weight in a borehole. The invention also arranges to apply an axial drilling force from the anchor and to the drill bit and to be able to pull the whole string portion in the borehole.
In the following is described an example of a preferred embodiment which is illustrated in the accompanying drawings wherein:
Fig. 1 shows a drilling portion and a string portion of a rock drilling machine in a borehole;
Fig. 2 shows partly in section and in a larger scale an anchor that is connected to a string portion where the anchor is in an inactive position; and
Fig. 3 shows the same as Fig. 2, but with the anchor in an active position.
In the drawings the reference numeral 1 indicates a rock drilling machine working in a borehole 2. The rock drilling machine 1 comprises a drilling portion 4 and a string portion 6 where the string portion 6 is provided with an anchor 8. The drilling portion 4 comprises in this embodiment a drill bit 10, a gear 12 and a drive motor 14. The string portion 6 comprises a hydraulic section 16 and an electric section 18.
A number of pipe lengths 20 which are screwed together form a pipe string 22 which in turn is connected to the electric section 18 and runs through the borehole 2 and out to a not shown support device .
The anchor 8, see Figs. 2 and 3, comprises an anchor housing 24 which surrounds a guide pipe 26. The guide pipe 26 forms a part of the string portion and has advantageously a cornered cross-section, generally square as in the embodiment shown.
The anchor housing 24 being provided with bearing material 28 abutting the guide pipe 26 is axially displaceable along the guide pipe .
The anchor 8 comprises four support shoes 30 distributed about the longitudinal axis 32 of the string portion 6.
In the following is described components belonging to one support shoe 30. The remainder of the support shoes 30 have implicitly corresponding components. Each support shoe 30 is by means of a first link 34 connected to the anchor housing 24 where the first link 34 is pivotally supported in a housing bracket 36. The first link 34 is connected to the support shoe 30 by means of a shaft 38.
A second link 40 is pivotally connected to the support shoe 32 in the shaft 38. The second link 40 is in its opposite end portion pivotally connected to a piston rod 44 of a hydraulic cylinder 42, and to a sliding attachment 46 which is displaceable relative to the anchor housing 24. A hydraulic feed cylinder 48 is positioned within the guide pipe 26. The feed cylinder 48 is connected to the string portion by means of piston rod attachment 50 and to the anchor 8 by means of a cylinder attachment 52 extending through longitudinal slots 54 in the guide pipe 26. The cylinder attachment 52 is bolted to the anchor housing 24 by means of brackets 56. The cylinder attachment 52 is thus axially displaceable in the slots 54.
The anchor 8 is in Fig. 2 shown in a position where the anchor 8 is in one of its end positions relative to the string portion 6. The support shoes 30 are retracted to their inactive positions.
When the anchor 8 is to be utilised to displace the string portion 6 in the borehole, in this case in the direction toward the drilling portion 4, the feed cylinder 48 displaces in its minus stroke the anchor 8 along the guide pipe 26 toward the other end position for the anchor 8, see Fig. 3.
Subsequently the hydraulic cylinder 42 displaces the sliding attachment 46 in a direction toward the housing bracket 36. The first and the second links 34, 40 thereby cause the support shoe 30 to be displaced radially outward and be preloaded against the wall of the borehole 2.
When the feed cylinder 48 is given a plus-stroke, the string portion 6 is displaced axially in the borehole 2 while the anchor 8 is left stationary relative to the borehole 2.
When the plus-stroke of the feed cylinder 48 is completed, the support shoe 30 is displaced to its inactive position.
The necessary hoses and cables for control and power supply are not shown, but are connected to not shown equipment in the hydraulic section 16 and the electric section 18. The exemplary embodiment in Figs. 2 and 3 show a somewhat simplified anchor 8 compared to the anchor 8 in Fig. 1, as all support shoes 30 in Fig. 1 are connected to a common ring cylinder 58.

Claims

2009/000200P a t e n t c l a i m s
1. A device for a rock drilling machine (1) for drilling of boreholes (2) in rock, where the rock drilling machine (1) comprises a drilling portion (4) and a string portion (6) which by means of joinable pipes
(20) are connected to a support device on the outside of the borehole (2), c h a r a c t e r i s e d i n that the string portion (6) is provided with an anchor (8) comprising at least one against the borehole (2) preloadable and relative to the string portion (6) axially displaceable support shoe (30) .
2. A device according to claim 1, c h a r a c t e r i s e d i n that the support shoe (30) is hydrauli- cally displaceable between a retracted non-active po- sition and an extended active position.
3. A device according to claim 1, c h a r a c t e r i s e d i n that multiple support shoes (30) that are distributed about the central axis (32) of the string portion (6) are mechanically interconnected to be able to be displaced synchronously.
4. A device according to claim 1, c h a r a c t e r i s e d i n that the support shoe (30) is connected to the anchor housing (24) of the anchor (8) by means of a first link (34) .
5. A device according to claim 1, c h a r a c t e r i s e d i n that the support shoe (30) is connected to a hydraulic cylinder (42) by means of a second link (40) .
6. A device according to claim 1, c h a r a c t e r - i s e d i n that the support shoe (30) abuts the anchor (8) via an in relation to the central axis (32) of the string portion (6) inclined abutment.
7. A device according to claim 1, c h a r a c t e r i s e d i n that the support shoe (30) is connected to the anchor (8) by means of a radially directed cylinder .
8. A device according to claim 1, c h a r a c t e r i s e d i n that the support shoe (30) is hydrauli- cally axially displaceable relative to the string por- tion (6) .
9. A device according to claim 1, c h a r a c t e r i s e d i n that the anchor (8) comprises a feed cylinder (48) .
PCT/NO2009/000200 2008-06-05 2009-05-29 Rock drilling device WO2009148322A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09758569.9A EP2350420B1 (en) 2008-06-05 2009-05-29 Rock drilling device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20082641 2008-06-05
NO20082641A NO333300B1 (en) 2008-06-05 2008-06-05 Device by rock drill

Publications (1)

Publication Number Publication Date
WO2009148322A1 true WO2009148322A1 (en) 2009-12-10

Family

ID=41398281

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2009/000200 WO2009148322A1 (en) 2008-06-05 2009-05-29 Rock drilling device

Country Status (3)

Country Link
EP (1) EP2350420B1 (en)
NO (1) NO333300B1 (en)
WO (1) WO2009148322A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019135682A1 (en) * 2018-01-02 2019-07-11 Norhard As Device at tunnel boring machine arranged for drilling operations without operators in the borehole
EP3735514A4 (en) * 2018-01-02 2021-12-08 Norhard Asset AS Device at tunnel boring machine arranged for drilling operations without operators in the borehole

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3088532A (en) 1960-12-27 1963-05-07 Jersey Prod Res Co Bit loading device
GB1060002A (en) 1962-09-27 1967-02-22 Wolfgang Ebeling Self-feeding drilling machine for boring rock and earth
US4700788A (en) 1985-05-06 1987-10-20 Shell Oil Company Directional drilling pipelay
SU1514942A1 (en) 1987-11-17 1989-10-15 Научно-Производственное Объединение Самоходной Горной Техники "Криворожрудмаш" Device for drilling mine workings
WO1995021987A1 (en) 1994-02-14 1995-08-17 Norsk Hydro A.S Locomotive or tractor for pulling equipment in a pipe or drill hole
US5613568A (en) 1993-05-06 1997-03-25 Lennart Nilsson Rock drilling machine
WO2005090739A1 (en) 2004-03-17 2005-09-29 Western Well Tool, Inc. Roller link toggle gripper for downhole tractor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1758505A1 (en) * 1968-06-14 1971-03-25 Demag Ag Method and device for driving a shaft with an auxiliary jacking shaft
DE2733199A1 (en) * 1977-07-22 1979-02-01 Adolf Rotter Downhole tool for drill rigs - has self-contained power drive for rotation, percussion and thrust behind the drill bit
US4314615A (en) * 1980-05-28 1982-02-09 George Sodder, Jr. Self-propelled drilling head
US4463814A (en) * 1982-11-26 1984-08-07 Advanced Drilling Corporation Down-hole drilling apparatus
GB8401452D0 (en) * 1984-01-19 1984-02-22 British Gas Corp Replacing mains
GB2183274B (en) * 1985-11-22 1988-08-10 Camco Inc Multiple line work performing apparatus
DE4404712A1 (en) * 1994-02-15 1995-08-17 Preussag Anlagenbau Process for removing an earth core from a trenchless pipe and pig to carry out the process
US5794703A (en) * 1996-07-03 1998-08-18 Ctes, L.C. Wellbore tractor and method of moving an item through a wellbore
US5752572A (en) * 1996-09-10 1998-05-19 Inco Limited Tractor for remote movement and pressurization of a rock drill

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3088532A (en) 1960-12-27 1963-05-07 Jersey Prod Res Co Bit loading device
GB1060002A (en) 1962-09-27 1967-02-22 Wolfgang Ebeling Self-feeding drilling machine for boring rock and earth
US4700788A (en) 1985-05-06 1987-10-20 Shell Oil Company Directional drilling pipelay
SU1514942A1 (en) 1987-11-17 1989-10-15 Научно-Производственное Объединение Самоходной Горной Техники "Криворожрудмаш" Device for drilling mine workings
US5613568A (en) 1993-05-06 1997-03-25 Lennart Nilsson Rock drilling machine
WO1995021987A1 (en) 1994-02-14 1995-08-17 Norsk Hydro A.S Locomotive or tractor for pulling equipment in a pipe or drill hole
WO2005090739A1 (en) 2004-03-17 2005-09-29 Western Well Tool, Inc. Roller link toggle gripper for downhole tractor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019135682A1 (en) * 2018-01-02 2019-07-11 Norhard As Device at tunnel boring machine arranged for drilling operations without operators in the borehole
EP3735514A4 (en) * 2018-01-02 2021-12-08 Norhard Asset AS Device at tunnel boring machine arranged for drilling operations without operators in the borehole

Also Published As

Publication number Publication date
EP2350420A4 (en) 2015-11-18
EP2350420B1 (en) 2018-02-21
EP2350420A1 (en) 2011-08-03
NO333300B1 (en) 2013-04-29
NO20082641L (en) 2009-12-07

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