CA1252456A - Means and device for prudent penetration of a casing through sensible overburden or sensible structures - Google Patents
Means and device for prudent penetration of a casing through sensible overburden or sensible structuresInfo
- Publication number
- CA1252456A CA1252456A CA000510556A CA510556A CA1252456A CA 1252456 A CA1252456 A CA 1252456A CA 000510556 A CA000510556 A CA 000510556A CA 510556 A CA510556 A CA 510556A CA 1252456 A CA1252456 A CA 1252456A
- Authority
- CA
- Canada
- Prior art keywords
- compressed air
- overburden
- sensible
- drill bit
- drill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
- E21B21/103—Down-hole by-pass valve arrangements, i.e. between the inside of the drill string and the annulus
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/48—Foundations inserted underneath existing buildings or constructions
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/28—Placing of hollow pipes or mould pipes by means arranged inside the piles or pipes
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Detergent Compositions (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
ABSTRACT
The present invention relates to a method and a device for driving down casings (2) through sensible overburden or sensible structures, making use of a drilling device (1) activated by compressed air that at the lower part of the drilling device (1) is led through exhaust channels (14, 142) in such a way that the major part (B) of the compressed air flow is directed upwards to be led away between the casing (2) and the drill stem together with the cuttings and a minor part (D) of the compressed air being fed to the drill bit.
The characterizing feature for the invention is that the compressed air in the exhaust channels (14, 142) is con-trolled in order to adapt the intensity of the compressed air flow to the material that is penetrated. The compressed air (D) fed to the drill bit is led away through jet action from the major part (B) of the compressed air.
The present invention relates to a method and a device for driving down casings (2) through sensible overburden or sensible structures, making use of a drilling device (1) activated by compressed air that at the lower part of the drilling device (1) is led through exhaust channels (14, 142) in such a way that the major part (B) of the compressed air flow is directed upwards to be led away between the casing (2) and the drill stem together with the cuttings and a minor part (D) of the compressed air being fed to the drill bit.
The characterizing feature for the invention is that the compressed air in the exhaust channels (14, 142) is con-trolled in order to adapt the intensity of the compressed air flow to the material that is penetrated. The compressed air (D) fed to the drill bit is led away through jet action from the major part (B) of the compressed air.
Description
- 2 -METHOD AND APPARATUS FOR DRIVING DOWN CASINGS THROUGH
SENSIBLE OVERBURDEN OR SENSIBEL STRUCTURES
The present invention relates to a method and a device for driving down casings to undisturbed ground without essentially displacing or spoiling sensible overburden and sensible structures~ In the casings piles or the like can be driven down for foundation or anchoring in more solid ground.
Sensible overburden includes, for instance, cultural layers from earlier civilizations that can be found under the ground surface having a thickness of up to 3 m. ~he cultural layers are a source of knowledge for the archeologist to learn about life and human beings during earlisr epoohs. ~he cultural layers are in some countries protected by law and must not be ruined.
Sensible structures are for instance walls of unhewn stone for older buildings, especially while work is conducted for reinforcing the fundament or sheet piling in or ad;acent to the structures. These works must be carried out very carefully if no permanent damage is to occur.
In general terms, the present invention provides, in one aspect thereof, an improvement in a method of drilling through sensible overburden, comprising the steps of downwardly advancing a drill stem having a drill bit while conducting compressed air through said drill bit and discharging said compressed air simultaneously through downwardly directed discharge passage means at a lower end of said drill bit, and through a plurality of upwardly directed discharge passages disposed above said lower end, which discharge the air into a space disposed between said drill string and said casing, whereby a major part of the compressed air flowing through said upwardly directed discharge passages and a minor part of said pressurized air being directed through said downwardly direoted discharge passage means to engage said overburden and then be sucked upwardly along a side wall o~ said drill bit by the action of said compressed air discharged through said upwardly directed discharge passages, said casing shielding the sensible overburden ~r 12S~4$~
SENSIBLE OVERBURDEN OR SENSIBEL STRUCTURES
The present invention relates to a method and a device for driving down casings to undisturbed ground without essentially displacing or spoiling sensible overburden and sensible structures~ In the casings piles or the like can be driven down for foundation or anchoring in more solid ground.
Sensible overburden includes, for instance, cultural layers from earlier civilizations that can be found under the ground surface having a thickness of up to 3 m. ~he cultural layers are a source of knowledge for the archeologist to learn about life and human beings during earlisr epoohs. ~he cultural layers are in some countries protected by law and must not be ruined.
Sensible structures are for instance walls of unhewn stone for older buildings, especially while work is conducted for reinforcing the fundament or sheet piling in or ad;acent to the structures. These works must be carried out very carefully if no permanent damage is to occur.
In general terms, the present invention provides, in one aspect thereof, an improvement in a method of drilling through sensible overburden, comprising the steps of downwardly advancing a drill stem having a drill bit while conducting compressed air through said drill bit and discharging said compressed air simultaneously through downwardly directed discharge passage means at a lower end of said drill bit, and through a plurality of upwardly directed discharge passages disposed above said lower end, which discharge the air into a space disposed between said drill string and said casing, whereby a major part of the compressed air flowing through said upwardly directed discharge passages and a minor part of said pressurized air being directed through said downwardly direoted discharge passage means to engage said overburden and then be sucked upwardly along a side wall o~ said drill bit by the action of said compressed air discharged through said upwardly directed discharge passages, said casing shielding the sensible overburden ~r 12S~4$~
- 3 -from air discharged from said upwardly directed passages, the improvement comprising the steps of providing in at least some of said upwardly directed discharge pasæages a removable insert having a through-passage therein, and exchanging said inserts with different inserts in order to vary the amount of pressurized air which is directed through said upwardly directed discharge passages and thereby to vary the amount of pressurized air which exits said downwardly directed discharge passage means and into contact with said sensible overburden in accordance with the type of material in the overburden, such that the amount of air contacting said sensible overburden is adapted to the type of material in said sensible overburden in a manner controlling the amount of disruption to said sensible overburden.
In another aspect of the present invention, a device is provided for drilling through sensible overburden or sensible structures, comprising a drilling stem which rotates in a casing, said drilling device being associated with a compressed air drive section, said device further comprising a drill bit having a drill tip, the drill bit being provided with exhaust channel means that are arranged to divert a major portion of the compressed air coming from a drive section of the device, upwards in order to lead it away between the casing and the drill stem together with the cuttings, the exhaust channel means further including a downwardly directed exhaust channel for a minor portion of the compressed air downwards for flushing around the drill tip, the device further comprising drawing means adapted to draw the air that has passed around the driil tip, the upwards along the side walls of the drill bit by jet action from the major part of the compressed air flow, the exhaust channel means and/or the channel having control means for controlling the compressed air flow in order to adapt the intensity of the minor portion of the compressed air, to the nature of the material that is penetrated by the device.
A preferred embodiment of the invention is described in the following with reference to the accompanying, diagrammatic, simplified drawings in which, Fig. 1 is a longitudinal section of the device according to ` l;~S;~5s~
the invention;
Figs. lA-lE are sections along A, B, C, D and E, respectively of Fig. 1;
Fig. 2 is a view corresponding to Fig. 1 but showing the flow of the compressed air;
Fig. 3 illustrates schematically the different worXing phases when piling in a sensible overburden; and Figs. 4A-4D illustrate schematically the different working phases when piling sensible fundaments for reinforcing buildings.
Figure 1 discloses in section a device for overburden drilling comprising a rotating drill 1, that is surrounded by a casing 2. The lower part of the drill, i.e. the drill bit, is shown in the figuras as a separate detail. The drill bit is assembled of a guiding device 11, reamer 12 and pilot bit 13. The drill also comprises an exhaust channel 14 for the compressed air operating the drill. These details are known per se. According to the invention the exhaust ohannel 14 is provided with a control valve 141, that opens and closes for the passing aompressed air in response to increasing and decreasing resp. counter pressure from the soil in the area of the pilot bit. Above this control valve 141 there are upwardly directed passages or exhaust channels 142 for the main part of the compressed air. The exhaust channels 142 are provided with valves 143 having passages whose areas are adapted to the material that the device is to penetrate. The valves 143 are accessible for exchange in order to carry out a coarse adjustment, if necessary, before starting a new drilling cycle. The valves 143 thus control the amount of a minor part of the compressed air, that passes through the control valve 141 and exits through a downwardly directed passage into contact with the sensible overburden, around the drill tip. rrhe air is then sucked upwardly along grooves 144 in the side walls of the drill bit by jet action generated by the compressed air that rushes out from the upwardly directed exhaust channels 142 through the valves 143. Since the grooves 144 have each a narrow lower inlet and a gradually upwardly increasing cross-sectional area, the cuttings can never stick anywhere on their way upwards and obstruct the channels.
- 5 - , Fig. 2 discloses in section the passage of the compressed air through the drill. The compressed air rushes vigorously through the exhaust channel 14 (arrow A) and is to a major extent pushed backwards by the constriction in the control valve 141.
The air then continues through the upwardly inclined exhaust channels 142 having valves 143 (arrow B) and then further upwards together with the cuttings flowing to the discharge area of valves 143 through the grooves 144 between the drill shank and the casing (arrow C). A minor portion of the compressed air flows through the control valve 141 (arrow D) for gentle flushing around the drill tip. It is sucked upwardly along the grooves 144 in the side walls of the drill bit (arrow E) through jet aotion from the compressed air that is rushing out in an upward direction from the exhaust channels 142 through the valves 143.
Fig. 3 discloses the different working phases when the casing and the drill is driven down into the overburden to a level just below the lower edge of the cultural layer. After the dril~ has been drawn up piling can take place through the casing without disturbing the cultured layer.
Phase 1 Mobile drill tower with casing 2 and drill 1 mounted, has arrived at the site.
Phase 2 The casing 2 is displaced downwards into the over-burden through the cultured layers.
Phase 3 The casing 2 is driven down in the overburden to a level just below the lower edge of the cultural layers.
Phase 4 A pile 16 is lowered into the casing.
Phase S The pile 16 is driven down into the overburden to a predetermined depth.
Phase 6 The pile 16 has reached the predetermined depth (driven to a stop in friction material) and then concreted 1~ in the oasing.
Fig. 4A to 4D discloses the different working phases when the casing and the drill are driven down through a fundament of unhewn stone.
Phase 1 (Fig. 4A) When the fundament 19 has been reinforced ` in certain areas 20 the drilling device can be entered on the 5'~56 floor above the base fundament.
Phase 2 (Fig. 4B) Casings 2 are driven through the fundament 19 down to a level just below the lower edge of the fundament 19.
Phase 3 (Fig. 4C) Steel piles 21 are driven down through the casings 2 until the end 22 of the piles 21 bear against the rock.
Phase 4 (Fig. 4D) After the steel piles have been driven down to a stop the drilling device is taken away. The damages of the fundament caused by the drilling are filled with concrete 23.
The invention is of course not restricted to the above described embodiments but many modifications are possible within the scope of the appending claims.
.~
In another aspect of the present invention, a device is provided for drilling through sensible overburden or sensible structures, comprising a drilling stem which rotates in a casing, said drilling device being associated with a compressed air drive section, said device further comprising a drill bit having a drill tip, the drill bit being provided with exhaust channel means that are arranged to divert a major portion of the compressed air coming from a drive section of the device, upwards in order to lead it away between the casing and the drill stem together with the cuttings, the exhaust channel means further including a downwardly directed exhaust channel for a minor portion of the compressed air downwards for flushing around the drill tip, the device further comprising drawing means adapted to draw the air that has passed around the driil tip, the upwards along the side walls of the drill bit by jet action from the major part of the compressed air flow, the exhaust channel means and/or the channel having control means for controlling the compressed air flow in order to adapt the intensity of the minor portion of the compressed air, to the nature of the material that is penetrated by the device.
A preferred embodiment of the invention is described in the following with reference to the accompanying, diagrammatic, simplified drawings in which, Fig. 1 is a longitudinal section of the device according to ` l;~S;~5s~
the invention;
Figs. lA-lE are sections along A, B, C, D and E, respectively of Fig. 1;
Fig. 2 is a view corresponding to Fig. 1 but showing the flow of the compressed air;
Fig. 3 illustrates schematically the different worXing phases when piling in a sensible overburden; and Figs. 4A-4D illustrate schematically the different working phases when piling sensible fundaments for reinforcing buildings.
Figure 1 discloses in section a device for overburden drilling comprising a rotating drill 1, that is surrounded by a casing 2. The lower part of the drill, i.e. the drill bit, is shown in the figuras as a separate detail. The drill bit is assembled of a guiding device 11, reamer 12 and pilot bit 13. The drill also comprises an exhaust channel 14 for the compressed air operating the drill. These details are known per se. According to the invention the exhaust ohannel 14 is provided with a control valve 141, that opens and closes for the passing aompressed air in response to increasing and decreasing resp. counter pressure from the soil in the area of the pilot bit. Above this control valve 141 there are upwardly directed passages or exhaust channels 142 for the main part of the compressed air. The exhaust channels 142 are provided with valves 143 having passages whose areas are adapted to the material that the device is to penetrate. The valves 143 are accessible for exchange in order to carry out a coarse adjustment, if necessary, before starting a new drilling cycle. The valves 143 thus control the amount of a minor part of the compressed air, that passes through the control valve 141 and exits through a downwardly directed passage into contact with the sensible overburden, around the drill tip. rrhe air is then sucked upwardly along grooves 144 in the side walls of the drill bit by jet action generated by the compressed air that rushes out from the upwardly directed exhaust channels 142 through the valves 143. Since the grooves 144 have each a narrow lower inlet and a gradually upwardly increasing cross-sectional area, the cuttings can never stick anywhere on their way upwards and obstruct the channels.
- 5 - , Fig. 2 discloses in section the passage of the compressed air through the drill. The compressed air rushes vigorously through the exhaust channel 14 (arrow A) and is to a major extent pushed backwards by the constriction in the control valve 141.
The air then continues through the upwardly inclined exhaust channels 142 having valves 143 (arrow B) and then further upwards together with the cuttings flowing to the discharge area of valves 143 through the grooves 144 between the drill shank and the casing (arrow C). A minor portion of the compressed air flows through the control valve 141 (arrow D) for gentle flushing around the drill tip. It is sucked upwardly along the grooves 144 in the side walls of the drill bit (arrow E) through jet aotion from the compressed air that is rushing out in an upward direction from the exhaust channels 142 through the valves 143.
Fig. 3 discloses the different working phases when the casing and the drill is driven down into the overburden to a level just below the lower edge of the cultural layer. After the dril~ has been drawn up piling can take place through the casing without disturbing the cultured layer.
Phase 1 Mobile drill tower with casing 2 and drill 1 mounted, has arrived at the site.
Phase 2 The casing 2 is displaced downwards into the over-burden through the cultured layers.
Phase 3 The casing 2 is driven down in the overburden to a level just below the lower edge of the cultural layers.
Phase 4 A pile 16 is lowered into the casing.
Phase S The pile 16 is driven down into the overburden to a predetermined depth.
Phase 6 The pile 16 has reached the predetermined depth (driven to a stop in friction material) and then concreted 1~ in the oasing.
Fig. 4A to 4D discloses the different working phases when the casing and the drill are driven down through a fundament of unhewn stone.
Phase 1 (Fig. 4A) When the fundament 19 has been reinforced ` in certain areas 20 the drilling device can be entered on the 5'~56 floor above the base fundament.
Phase 2 (Fig. 4B) Casings 2 are driven through the fundament 19 down to a level just below the lower edge of the fundament 19.
Phase 3 (Fig. 4C) Steel piles 21 are driven down through the casings 2 until the end 22 of the piles 21 bear against the rock.
Phase 4 (Fig. 4D) After the steel piles have been driven down to a stop the drilling device is taken away. The damages of the fundament caused by the drilling are filled with concrete 23.
The invention is of course not restricted to the above described embodiments but many modifications are possible within the scope of the appending claims.
.~
Claims (10)
1. In a method of drilling through sensible overburden, comprising the steps of downwardly advancing a drill stem having a drill bit, while conducting compressed air through said drill bit and discharging said compressed air simultaneously through downwardly directed discharge passage means at a lower end of said drill bit, and through a plurality of upwardly directed discharge passages disposed above said lower end, which discharge passages discharge the air into a space disposed between said drill string and said casing, a major part of the compressed air flowing through said upwardly directed discharge passages and a minor part of said pressurized air being directed through said downwardly directed discharge passage means to engage said overburden and then be sucked upwardly along a side wall of said drill bit by the action of said compressed air discharged through said upwardly directed discharge passages, said casing shielding the sensible overburden from air dis-charged from said upwardly directed passages, the improvement comprising the steps of providing in at least some of said upwardly directed discharge passages a removable insert having a through-passage therein, and exchanging said inserts with different inserts in order to vary the amount of pressurized air which is directed through said upwardly directed discharge passages and thereby to vary the amount of pressurized air which exits said downwardly directed discharge passage means and into contact with said sensible overburden in accordance with the type of material in the overburden, such that the amount of air contacting said sensible overburden is adapted to the type of material in said sensible overburden in a manner controlling the amount of disruption to said sensible overburden.
2. Method according to claim 1, further comprising the step of controling the downwardly directed discharge passage means with a constriction comprising a control valve having a through-passage area increasing or decreasing the through-passage area in response to the variations in counter pressure from the soil adjacent the drill bit.
3. Method according to claim 1 or 2, wherein the pres-surized air which exits said downwardly directed discharge passage means into contact with said sensible overburden is sucked upwards in vertical discharge grooves having a lower narrow inlet and an upwards continuously increasing cross-section area.
4. Method according to claim 1, wherein the casing driven down into the overburden is used as an encasing protective mantle for penetration of a sensible overburden for foundation of a new building or reinforcement of the fundament of an existing building.
5. Device for drilling through sensible overburden or sensible structures, comprising a drilling stem which rotates in a casing, said drilling device being associated with a com-pressed air drive section, said device further comprising a drill bit having a drill tip, the drill bit being provided with exhaust channel means that are arranged to divert a major portion of the compressed air coming from a drive section of the device, upwards in order to lead it away between the casing and the drill stem together with the cuttings, the exhaust channel means further including a downwardly directed exhaust channel for a minor portion of the compressed air downwards for flushing around the drill tip, the device further comprising drawing means adapted to draw the air that has passed around the drill tip, the upwards along the side walls of the drill bit by jet action from the major part of the compressed air flow, the exhaust channel means and/or the channel having control means for controlling the compressed air flow in order to adapt the intensity of the minor portion of the compressed air, to the nature of the material that is penetrated by the device.
6. Device according to claim 5, wherein the exhaust channel means for the major part of the compressed air flow has at least one valve with adjustable through-passage area.
7. Device according to claim 6, wherein the valve is exchangeable.
8. Device according to one or more of claims 5, 6 or 7, wherein the downwardly directed exhaust channel has a control valve which is so designed that its through-passage area increases and decreases in response to variations of counter pressure from the soil adjacent the drill bit.
9. Device according to one or more of claims 5, 6 or 7, wherein generally vertical discharge grooves are provided in the drill bit to provide passage for the compressed air flowing upwards after having flushed the drill tip, said grooves having a cross-sectional area which gradually increases in the upward direction.
10. Device according to one or more of claims 5, 6 or 7, wherein the downwardly directed exhaust channel has a control valve which is so designed that its through-passage area increases and decreases in response to variations of counter pressure from the soil adjacent the drill bit and wherein generally vertical discharge grooves are provided in the drill bit to provide passage for the compressed air flowing upwards after having flushed the drill tip, said grooves having a cross-sectional area which gradually increases in the upward direc-tion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8502723-3 | 1985-06-03 | ||
| SE8502723A SE461345B (en) | 1985-06-03 | 1985-06-03 | SETTING AND DEVICE CAREFULLY DOWNLOAD FEEDING ROOMS BY ORIGINAL MARK AND ORIGINAL CONSTRUCTIONS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1252456A true CA1252456A (en) | 1989-04-11 |
Family
ID=20360425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000510556A Expired CA1252456A (en) | 1985-06-03 | 1986-06-02 | Means and device for prudent penetration of a casing through sensible overburden or sensible structures |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US4765416A (en) |
| EP (1) | EP0204677B1 (en) |
| JP (1) | JPS626024A (en) |
| CN (1) | CN86103916A (en) |
| AT (1) | ATE63147T1 (en) |
| AU (1) | AU5806586A (en) |
| BR (1) | BR8602576A (en) |
| CA (1) | CA1252456A (en) |
| DE (1) | DE3678997D1 (en) |
| FI (1) | FI862360A (en) |
| IE (1) | IE57420B1 (en) |
| SE (1) | SE461345B (en) |
| ZA (1) | ZA863997B (en) |
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| US7882902B2 (en) | 2006-11-17 | 2011-02-08 | Weatherford/Lamb, Inc. | Top drive interlock |
| FI20095046A0 (en) | 2009-01-21 | 2009-01-21 | Atlas Copco Rotex Ab Oy | Method and device for submersible drilling |
| NO332113B1 (en) | 2010-08-05 | 2012-06-25 | Tomax As | Device at pump located at a drill bit. |
| SE535421C2 (en) * | 2010-08-26 | 2012-07-31 | Atlas Copco Rock Drills Ab | Method and system for determining a change in a flushing medium flow and rock drilling device |
| CN102477846B (en) * | 2010-11-27 | 2014-04-30 | 中铁西北科学研究院有限公司 | Soil-layer broaching bit |
| CN105002898B (en) * | 2015-07-15 | 2017-01-18 | 周兆弟 | Drill rod rotation driving mechanism of cement soil mixing pile driver |
| WO2023218396A1 (en) * | 2022-05-12 | 2023-11-16 | Viking Rental Corporation Oü | Method of installation of a drill pile and the drill pill |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB282820A (en) * | 1926-12-29 | 1928-08-30 | Alexander George Rotinoff | Improvements relating to caissons |
| US2239872A (en) * | 1939-03-25 | 1941-04-29 | Emanuel T Beplat | Apparatus for sinking forms for concrete piles |
| US2805043A (en) * | 1952-02-09 | 1957-09-03 | Jr Edward B Williams | Jetting device for rotary drilling apparatus |
| US2765146A (en) * | 1952-02-09 | 1956-10-02 | Jr Edward B Williams | Jetting device for rotary drilling apparatus |
| US2807443A (en) * | 1953-11-02 | 1957-09-24 | Joy Mfg Co | Percussive drill bit |
| US3011547A (en) * | 1957-09-25 | 1961-12-05 | Sinclair Oil & Gas Company | Method of preventing loss of gaseous drilling fluid |
| US3011571A (en) * | 1961-01-23 | 1961-12-05 | Bree Oscar L De | Self cleaning rock drill bit |
| US3916634A (en) * | 1973-03-12 | 1975-11-04 | Roy J Woodruff | Method for forming holes in earth and setting subterranean structures therein |
| AT345759B (en) * | 1975-03-22 | 1978-10-10 | Walter Gmbh Co H P | DEEPHOLE DRILL |
| FR2407336A1 (en) * | 1977-10-27 | 1979-05-25 | Petroles Cie Francaise | REVERSE CIRCULATION DRILLING PROCEDURE WITH DEPRESSION EFFECT AND CIRCULATION REVERSE IN THE ROD TRAIN AND IMPLEMENTATION DEVICE |
| FR2442954A1 (en) * | 1977-11-21 | 1980-06-27 | Inst Francais Du Petrole | IMPROVED SUCTION DRILLING TOOL |
| US4494613A (en) * | 1982-03-11 | 1985-01-22 | Kabushiki Kaisha Komatsu Seisakusho | Method and apparatus for driving hollow piles into the ground |
| EP0106702A3 (en) * | 1982-10-19 | 1986-02-05 | Drumco | Drill bit assembly having improved operational life |
| US4610321A (en) * | 1985-03-25 | 1986-09-09 | Whaling Michael H | Cavitating jet device |
-
1985
- 1985-06-03 SE SE8502723A patent/SE461345B/en not_active IP Right Cessation
-
1986
- 1986-05-28 ZA ZA863997A patent/ZA863997B/en unknown
- 1986-05-28 IE IE1407/86A patent/IE57420B1/en unknown
- 1986-05-29 AU AU58065/86A patent/AU5806586A/en not_active Abandoned
- 1986-05-29 EP EP86850191A patent/EP0204677B1/en not_active Expired - Lifetime
- 1986-05-29 AT AT86850191T patent/ATE63147T1/en not_active IP Right Cessation
- 1986-05-29 DE DE8686850191T patent/DE3678997D1/en not_active Expired - Lifetime
- 1986-06-02 US US06/869,697 patent/US4765416A/en not_active Expired - Fee Related
- 1986-06-02 CA CA000510556A patent/CA1252456A/en not_active Expired
- 1986-06-02 JP JP61125959A patent/JPS626024A/en active Pending
- 1986-06-03 BR BR8602576A patent/BR8602576A/en unknown
- 1986-06-03 FI FI862360A patent/FI862360A/en not_active Application Discontinuation
- 1986-06-03 CN CN198686103916A patent/CN86103916A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| IE57420B1 (en) | 1992-08-26 |
| EP0204677A3 (en) | 1988-03-02 |
| US4765416A (en) | 1988-08-23 |
| AU5806586A (en) | 1986-12-11 |
| CN86103916A (en) | 1986-12-17 |
| FI862360A0 (en) | 1986-06-03 |
| BR8602576A (en) | 1987-02-03 |
| FI862360A (en) | 1986-12-04 |
| SE8502723D0 (en) | 1985-06-03 |
| IE861407L (en) | 1986-12-03 |
| EP0204677B1 (en) | 1991-05-02 |
| ZA863997B (en) | 1987-01-28 |
| JPS626024A (en) | 1987-01-13 |
| DE3678997D1 (en) | 1991-06-06 |
| EP0204677A2 (en) | 1986-12-10 |
| ATE63147T1 (en) | 1991-05-15 |
| SE8502723L (en) | 1986-12-04 |
| SE461345B (en) | 1990-02-05 |
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