US20070240891A1 - Drilling machine - Google Patents
Drilling machine Download PDFInfo
- Publication number
- US20070240891A1 US20070240891A1 US11/783,803 US78380307A US2007240891A1 US 20070240891 A1 US20070240891 A1 US 20070240891A1 US 78380307 A US78380307 A US 78380307A US 2007240891 A1 US2007240891 A1 US 2007240891A1
- Authority
- US
- United States
- Prior art keywords
- drilling
- boom
- wheel
- machine
- rod
- 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.)
- Abandoned
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 18
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
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
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/003—Supports for the drilling machine, e.g. derricks or masts adapted to be moved on their substructure, e.g. with skidding means; adapted to drill a plurality of wells
Definitions
- This invention relates to an improved multi-purpose drilling machine.
- a multi-purpose drilling machine designed to drill horizontal longitudinal holes in tunnel excavations and vertical holes for jet-grouting work, or holes with any inclination, e.g. for drainage and the like, of the type consisting of a self-propelled tracked vehicle on which is mounted a motor unit connected to a mobile upright that supports a drilling-rod boom.
- Said machine is characterised in that it includes a particular coupling of the upright fitted with counterweights to prevent the machine from overturning when the boom is operating at the maximum distance from the centre of gravity of the machine; it is further characterised in that it includes a locking and compensation system which allows the drilling rod to be positioned precisely on the hole, even when the boom is fully extended and the considerable bending moment created can cause the structure to buckle.
- drilling machines to which a drilling-rod boom is fitted are known, said boom being equipped with guides on which a rotary table runs; said boom is supported by two telescopic uprights which can rotate around the longitudinal axis of the machine, allowing holes to be drilled in the largest possible area while the machine remains in the same position.
- the majority of these drilling-rod booms are rigid structures, with a fixed length, which can be up to 20-25 metres for the most common applications.
- telescopic booms are used to combat this tendency to overturn; however, said booms, which rest on the ground to provide a wider support base, hamper the free movement of the uprights, which often cannot move the drilling-rod boom to ground level.
- this invention provides for the upright that supports the drilling-rod boom to be mounted on a fifth wheel that allows it to rotate around the longitudinal axis of the machine, and for a system of counterweights to be connected to said fifth wheel to balance the moment caused by the distance of the drilling-rod boom from the centre of gravity of the machine, especially when the upright is in the horizontal position.
- a second improvement relates to the way in which the drilling-rod boom is connected to the upright.
- the invention comprises a drilling-rod boom support hinged at the upper end of the upright, consisting of two plates between which are inserted a series of adjustable supports that enable the inclination of one plate in relation to the other to be varied slightly, thus compensating for any bending of the projecting structure.
- a fifth wheel which enables the boom to rotate in relation to the end of the upright is fitted to said support.
- FIG. 1 is a side view of the improved drilling machine
- FIG. 2 is a perspective view of the improved drilling machine
- FIG. 3 is a perspective view of the movement unit of the drilling-rod boom
- FIG. 4 is a side view of the drilling-rod boom support and its locking system
- FIG. 5 is a perspective view of the locking system of the drilling-rod boom support
- the machine moves on tracks 1 and is fitted with a movement and drilling-rod boom support unit shown as no. 2 .
- said unit comprises an upright 3 , to the end of which is fitted boom 4 , and which is hinged on the opposite side to a fifth wheel 5 .
- Said fifth wheel can rotate, moving the boom from a position at ground level on one side of the machine to a corresponding position on the opposite side.
- a series of counterweights 6 in an eccentric position in relation to the axis of rotation of the fifth wheel, are fitted to said fifth wheel.
- This compact, low-cost device solves the problem of overturning risk which affected the systems according to the prior art.
- a support 7 is hinged to the other end of upright 3 , and a second fifth wheel 8 , which in turn is connected to drilling-rod boom 4 , rotates on said support 7 .
- Said boom consists of a front part 9 and a beam 10 fixed rigidly to fifth wheel 8 .
- Front part 9 of the boom consists of a tubular latticework structure which is both light and rigid, thus preventing excessive flexural stresses on fifth wheel 8 and the whole of the boom.
- a support-guide 11 for the drilling rod is positioned at the end of said structure.
- Beam 10 which, as stated, is connected to the upright via a fifth wheel, is a rigid structure. Guides on which the carriage that carries rotary table 12 runs are fitted to said beam 10 .
- a pair of pistons 13 cause the support to be inclined from the upright position so as to regulate the inclination of the drilling-rod boom.
- support 7 consists of a lower plate 14 and an upper plate 15 integral with fifth wheel 8 .
- this innovation provides for the drilling-rod boom to consist partly of a latticework structure which, being both lighter and more rigid than the structure according to the prior art, considerably reduces bending of the boom.
- the unit comprising support 7 , plates 14 and 15 and fifth wheel 8 is the only constraint that supports the boom, it is the element subjected to the maximum bending moment formed by the distributed weight of the boom and the reactions to which the tool is subjected during operations.
- this stress can be so intense as to cause bending of the plates and consequent buckling of the support, as said element is fairly elastic.
- Upper plate 15 is parallel to plate 14 when the support is not under load. However, when it is under load, said upper plate tends to tilt by a few degrees in relation to the lower plate, causing a significant movement at the end of the drilling-rod boom.
- the present invention provides for an adjustable locking device 16 to be inserted between the two plates in such a way that when tightened, said device prevents any relative movement between the two plates.
- said device 16 consists of one or more plates 17 to which one or more perforated threaded pins 18 are welded.
- Sleeves 19 are screwed to said pins.
- the device When the boom has been positioned in the desired operating position the device is inserted between the two plates and regulated, so that by screwing sleeves 19 to a greater or lesser extent on threaded pins 18 the length of said elements inserted between the two plates is adjusted, and said plates thus return to a parallel position.
- This locking system guarantees that the distance between the two plates of the fifth wheel will remain unchanged, so that they do not move closer together or further apart, thus eliminating the above-mentioned problem of inaccurate tool positioning.
- the result is a multi-purpose drilling machine which simultaneously presents two advantages, namely greater stability than known machines and a more rigid structure.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
An improved multi-purpose drilling machine of the type including a self-propelled vehicle to which is fitted a fifth wheel (5) that carries a support and movement unit (2) for a drilling-rod boom (4). The machine includes a system of counterweights (6) mounted on the fifth wheel (5) on the opposite side of the drilling-rod boom to the axis of rotation of the fifth wheel. The counterweights are designed to offset, at least partly, the moment created by the drilling-rod boom on the structure of the machine. In particular, the drilling-rod boom (4) is mounted at the end of an upright (3), which in turn is hinged to the fifth wheel (5) so that the boom (4) can be moved from a substantially vertical to a substantially horizontal position and vice versa, the fifth wheel (5) rotating around an axis parallel to the longitudinal axis of the machine.
Description
- This invention relates to an improved multi-purpose drilling machine.
- In particular, it relates to a multi-purpose drilling machine designed to drill horizontal longitudinal holes in tunnel excavations and vertical holes for jet-grouting work, or holes with any inclination, e.g. for drainage and the like, of the type consisting of a self-propelled tracked vehicle on which is mounted a motor unit connected to a mobile upright that supports a drilling-rod boom.
- Said machine is characterised in that it includes a particular coupling of the upright fitted with counterweights to prevent the machine from overturning when the boom is operating at the maximum distance from the centre of gravity of the machine; it is further characterised in that it includes a locking and compensation system which allows the drilling rod to be positioned precisely on the hole, even when the boom is fully extended and the considerable bending moment created can cause the structure to buckle.
- To excavate a tunnel, it is usually necessary to drill a series of substantially horizontal holes a few centimetres in diameter in the face to be excavated, and insert strengthening elements that prevent the earth above from collapsing during the excavations.
- According to the state of the art, drilling machines to which a drilling-rod boom is fitted are known, said boom being equipped with guides on which a rotary table runs; said boom is supported by two telescopic uprights which can rotate around the longitudinal axis of the machine, allowing holes to be drilled in the largest possible area while the machine remains in the same position.
- According to the state of the art, the majority of these drilling-rod booms are rigid structures, with a fixed length, which can be up to 20-25 metres for the most common applications.
- The problem presented by the systems according to the prior art is that when the uprights are positioned horizontally, i.e. the drilling-rod boom is at the maximum distance from the longitudinal axis of the machine, the machine is considerably unbalanced and risks overturning.
- At present, telescopic booms are used to combat this tendency to overturn; however, said booms, which rest on the ground to provide a wider support base, hamper the free movement of the uprights, which often cannot move the drilling-rod boom to ground level.
- Moreover, as the uprights that support the drilling rod are relatively close together, it projects for much of its length, and as it is a fairly heavy structure, it tends to bend, causing inaccuracies in the positioning of the drill bit.
- In order to eliminate the problems described above, this invention provides for the upright that supports the drilling-rod boom to be mounted on a fifth wheel that allows it to rotate around the longitudinal axis of the machine, and for a system of counterweights to be connected to said fifth wheel to balance the moment caused by the distance of the drilling-rod boom from the centre of gravity of the machine, especially when the upright is in the horizontal position.
- A second improvement relates to the way in which the drilling-rod boom is connected to the upright.
- In particular, the invention comprises a drilling-rod boom support hinged at the upper end of the upright, consisting of two plates between which are inserted a series of adjustable supports that enable the inclination of one plate in relation to the other to be varied slightly, thus compensating for any bending of the projecting structure.
- A fifth wheel which enables the boom to rotate in relation to the end of the upright is fitted to said support.
- This invention will now be described in detail, by way of example but not of limitation, by reference to the annexed figures wherein:
-
FIG. 1 is a side view of the improved drilling machine; -
FIG. 2 is a perspective view of the improved drilling machine; -
FIG. 3 is a perspective view of the movement unit of the drilling-rod boom; -
FIG. 4 is a side view of the drilling-rod boom support and its locking system; -
FIG. 5 is a perspective view of the locking system of the drilling-rod boom support; - The machine moves on
tracks 1 and is fitted with a movement and drilling-rod boom support unit shown as no. 2. - In particular, said unit comprises an upright 3, to the end of which is fitted
boom 4, and which is hinged on the opposite side to afifth wheel 5. - Said fifth wheel can rotate, moving the boom from a position at ground level on one side of the machine to a corresponding position on the opposite side.
- A series of
counterweights 6, in an eccentric position in relation to the axis of rotation of the fifth wheel, are fitted to said fifth wheel. - As said counterweights are integral with the mobile plate of the fifth wheel,, whatever the position of the mobile boom the moment created by the boom is always balanced, at least partially, thus preventing the machine from overturning.
- This compact, low-cost device solves the problem of overturning risk which affected the systems according to the prior art.
- A
support 7 is hinged to the other end of upright 3, and a secondfifth wheel 8, which in turn is connected to drilling-rod boom 4, rotates on saidsupport 7. - Said boom consists of a
front part 9 and abeam 10 fixed rigidly tofifth wheel 8. -
Front part 9 of the boom consists of a tubular latticework structure which is both light and rigid, thus preventing excessive flexural stresses onfifth wheel 8 and the whole of the boom. A support-guide 11 for the drilling rod is positioned at the end of said structure. -
Beam 10 which, as stated, is connected to the upright via a fifth wheel, is a rigid structure. Guides on which the carriage that carries rotary table 12 runs are fitted to saidbeam 10. - A pair of
pistons 13 cause the support to be inclined from the upright position so as to regulate the inclination of the drilling-rod boom. As shown inFIG. 4 ,support 7 consists of alower plate 14 and anupper plate 15 integral withfifth wheel 8. - The problem that affects the systems according to the prior art is that in view of its considerable length, the drilling-rod boom is subjected to flexural stresses that cause high deflection at the drilling rod bit, leading to imprecision in the positioning of the rod.
- In order to eliminate said problem, this innovation provides for the drilling-rod boom to consist partly of a latticework structure which, being both lighter and more rigid than the structure according to the prior art, considerably reduces bending of the boom.
- Moreover, as the
unit comprising support 7,plates fifth wheel 8 is the only constraint that supports the boom, it is the element subjected to the maximum bending moment formed by the distributed weight of the boom and the reactions to which the tool is subjected during operations. - In some cases, this stress can be so intense as to cause bending of the plates and consequent buckling of the support, as said element is fairly elastic.
-
Upper plate 15 is parallel toplate 14 when the support is not under load. However, when it is under load, said upper plate tends to tilt by a few degrees in relation to the lower plate, causing a significant movement at the end of the drilling-rod boom. - To solve this problem, the present invention provides for an
adjustable locking device 16 to be inserted between the two plates in such a way that when tightened, said device prevents any relative movement between the two plates. - As shown in
FIG. 5 , saiddevice 16 consists of one ormore plates 17 to which one or more perforated threadedpins 18 are welded. - Sleeves 19, also threaded internally, are screwed to said pins.
- When the boom has been positioned in the desired operating position the device is inserted between the two plates and regulated, so that by
screwing sleeves 19 to a greater or lesser extent on threadedpins 18 the length of said elements inserted between the two plates is adjusted, and said plates thus return to a parallel position. - Next,
bolts 20 passing throughsleeves 19 and threadedpins 18 are inserted into holes insupport plates 7 to lock the assembly and make the support unit more rigid. - This locking system guarantees that the distance between the two plates of the fifth wheel will remain unchanged, so that they do not move closer together or further apart, thus eliminating the above-mentioned problem of inaccurate tool positioning.
- The result is a multi-purpose drilling machine which simultaneously presents two advantages, namely greater stability than known machines and a more rigid structure.
- An expert in the field could devise various modifications and variations, all of which should be deemed to fall within the ambit of this invention as defined in the appended claims.
Claims (6)
1) Multi-purpose drilling machine of the type comprising a self-propelled vehicle to which is fitted a fifth wheel (5) that carries a support and movement unit (2) for a drilling-rod boom (4), characterised in that it includes a system of counterweights (6) mounted on said fifth wheel (5) on the opposite side of the drilling-rod boom to the axis of rotation of said fifth wheel, which said counterweights are designed to offset, at least partly, the moment created by said drilling-rod boom on the structure of the machine.
2) Multi-purpose drilling machine as claimed in claim 1 , wherein said drilling-rod boom (4) is mounted at the end of an upright (3), which in turn is hinged to said fifth wheel (5) so that said boom (4) can be moved from a substantially vertical to a substantially horizontal position and vice versa.
3) Multi-purpose drilling machine as claimed in claim 2 , wherein said fifth wheel (5) rotates around an axis parallel to the longitudinal axis of the machine.
4) Multi-purpose drilling machine as claimed in claim 3 , wherein said drilling-rod boom (4) is mounted on said upright (3) via a support (7) consisting of two plates (14, 15) with adjustable supports (18, 19) inserted between them.
5) Multi-purpose drilling machine as claimed in claim 4 , wherein said adjustable supports are constituted by a plate (17) to which are welded one or more threaded pins (18), to each of which is screwed an adjustable sleeve (19), so that the length of said supports, and consequently the distance between said plates (14, 15), can be varied by screwing in said sleeves to a greater or lesser extent.
6) Multi-purpose drilling machine as claimed in claim 5 , characterised in that said pins (18) contain holes to allow the insertion of bolts (20) that secure the supports to the plates.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITPC2006A000022 | 2006-04-14 | ||
IT000022A ITPC20060022A1 (en) | 2006-04-14 | 2006-04-14 | IMPROVED DRILLING MACHINE |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070240891A1 true US20070240891A1 (en) | 2007-10-18 |
Family
ID=38180417
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/783,803 Abandoned US20070240891A1 (en) | 2006-04-14 | 2007-04-12 | Drilling machine |
Country Status (3)
Country | Link |
---|---|
US (1) | US20070240891A1 (en) |
EP (1) | EP1845232A1 (en) |
IT (1) | ITPC20060022A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150082598A1 (en) * | 2011-05-26 | 2015-03-26 | Lavalley Industries, Llc | Attachment for making up or breaking out pipe |
CN110924873A (en) * | 2019-11-18 | 2020-03-27 | 江苏徐工工程机械研究院有限公司 | Drilling machine and mast deflection mechanism thereof |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104018785B (en) * | 2014-06-26 | 2016-05-04 | 河北联合大学 | A kind of mine working is helped hole jumbolter drilling machine platform |
CN105863519B (en) * | 2016-04-11 | 2018-04-03 | 湖南文理学院 | The stable efficiently hydraulic drill rig servicing unit of one kind |
Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3470969A (en) * | 1967-04-07 | 1969-10-07 | Lino Arcangeli | Hydraulic boom particularly for blast hole drilling methods |
US3567218A (en) * | 1968-05-29 | 1971-03-02 | Edwin S Johnson | Bending exercising device |
US3645343A (en) * | 1970-05-11 | 1972-02-29 | Gordon E Mays | Rotary drilling machine |
US3917005A (en) * | 1974-03-20 | 1975-11-04 | Cannon & Associates | Underground blast hole drilling machine |
US4124081A (en) * | 1975-05-07 | 1978-11-07 | Foresight Industries | Post driving machine |
US4158520A (en) * | 1977-03-03 | 1979-06-19 | Atlas Copco Aktiebolag | Rock bolting apparatus |
US4363519A (en) * | 1980-10-14 | 1982-12-14 | Joy Manufacturing Company | Continuous mining machine |
US4627499A (en) * | 1984-04-27 | 1986-12-09 | Magee William E | Mobile drilling machine |
US4645084A (en) * | 1985-02-21 | 1987-02-24 | Construction Robotics, Inc. | Robot arm |
US4877091A (en) * | 1988-06-27 | 1989-10-31 | Howell Jr Richard L | Augering apparatus and drilling rig |
US4915180A (en) * | 1988-11-07 | 1990-04-10 | Schisler Ralph T | Post driver |
US5226488A (en) * | 1991-07-10 | 1993-07-13 | Bor-Mor Inc. | Truck mounted boring system |
US5551519A (en) * | 1992-06-10 | 1996-09-03 | Elin Energieversorgung Gesellschaft M.B.H. | Device for driving piles, preferably poles, into a foundation |
US5746277A (en) * | 1995-11-06 | 1998-05-05 | Howell, Jr.; Richard L. | Drilling apparatus |
US5944452A (en) * | 1998-03-30 | 1999-08-31 | Reinert, Sr.; Gary L. | Heavy duty foundation installation apparatus and method |
US6152244A (en) * | 1997-07-11 | 2000-11-28 | Sandvik Tamrock Secoma Sa | Drilling apparatus mounted on wheels, with articulated chassis |
US6298928B1 (en) * | 2000-07-26 | 2001-10-09 | Michael D. Penchansky | Drill rig and construction and configuration thereof |
US6896072B2 (en) * | 2001-10-09 | 2005-05-24 | Macdonald Claude | Multi-functional drilling vehicle |
US7055630B1 (en) * | 2004-03-04 | 2006-06-06 | Jones Wayne Burton | Erection of signs using a single vehicle |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9110495U1 (en) | 1991-08-24 | 1991-10-17 | Ing. G. Klemm, Bohrtechnik GmbH, 5962 Drolshagen | Mobile drilling rig |
-
2006
- 2006-04-14 IT IT000022A patent/ITPC20060022A1/en unknown
-
2007
- 2007-03-23 EP EP07006009A patent/EP1845232A1/en not_active Withdrawn
- 2007-04-12 US US11/783,803 patent/US20070240891A1/en not_active Abandoned
Patent Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3470969A (en) * | 1967-04-07 | 1969-10-07 | Lino Arcangeli | Hydraulic boom particularly for blast hole drilling methods |
US3567218A (en) * | 1968-05-29 | 1971-03-02 | Edwin S Johnson | Bending exercising device |
US3645343A (en) * | 1970-05-11 | 1972-02-29 | Gordon E Mays | Rotary drilling machine |
US3917005A (en) * | 1974-03-20 | 1975-11-04 | Cannon & Associates | Underground blast hole drilling machine |
US4124081A (en) * | 1975-05-07 | 1978-11-07 | Foresight Industries | Post driving machine |
US4158520A (en) * | 1977-03-03 | 1979-06-19 | Atlas Copco Aktiebolag | Rock bolting apparatus |
US4363519A (en) * | 1980-10-14 | 1982-12-14 | Joy Manufacturing Company | Continuous mining machine |
US4627499A (en) * | 1984-04-27 | 1986-12-09 | Magee William E | Mobile drilling machine |
US4645084A (en) * | 1985-02-21 | 1987-02-24 | Construction Robotics, Inc. | Robot arm |
US4877091A (en) * | 1988-06-27 | 1989-10-31 | Howell Jr Richard L | Augering apparatus and drilling rig |
US4915180A (en) * | 1988-11-07 | 1990-04-10 | Schisler Ralph T | Post driver |
US5226488A (en) * | 1991-07-10 | 1993-07-13 | Bor-Mor Inc. | Truck mounted boring system |
US5551519A (en) * | 1992-06-10 | 1996-09-03 | Elin Energieversorgung Gesellschaft M.B.H. | Device for driving piles, preferably poles, into a foundation |
US5746277A (en) * | 1995-11-06 | 1998-05-05 | Howell, Jr.; Richard L. | Drilling apparatus |
US6152244A (en) * | 1997-07-11 | 2000-11-28 | Sandvik Tamrock Secoma Sa | Drilling apparatus mounted on wheels, with articulated chassis |
US5944452A (en) * | 1998-03-30 | 1999-08-31 | Reinert, Sr.; Gary L. | Heavy duty foundation installation apparatus and method |
US6298928B1 (en) * | 2000-07-26 | 2001-10-09 | Michael D. Penchansky | Drill rig and construction and configuration thereof |
US6896072B2 (en) * | 2001-10-09 | 2005-05-24 | Macdonald Claude | Multi-functional drilling vehicle |
US7055630B1 (en) * | 2004-03-04 | 2006-06-06 | Jones Wayne Burton | Erection of signs using a single vehicle |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150082598A1 (en) * | 2011-05-26 | 2015-03-26 | Lavalley Industries, Llc | Attachment for making up or breaking out pipe |
US10184304B2 (en) * | 2011-05-26 | 2019-01-22 | Lavalley Industries, Llc | Attachment for making up or breaking out pipe |
US11480019B2 (en) * | 2011-05-26 | 2022-10-25 | Lavalley Industries, Llc | Attachment for making up or breaking out pipe |
CN110924873A (en) * | 2019-11-18 | 2020-03-27 | 江苏徐工工程机械研究院有限公司 | Drilling machine and mast deflection mechanism thereof |
Also Published As
Publication number | Publication date |
---|---|
EP1845232A1 (en) | 2007-10-17 |
ITPC20060022A1 (en) | 2007-10-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: EGTECHNOLOGY S.P.A., ITALY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SAVI, RAFFAELE;REEL/FRAME:019242/0063 Effective date: 20070219 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |