US2979141A - Earth boring apparatus - Google Patents
Earth boring apparatus Download PDFInfo
- Publication number
- US2979141A US2979141A US696179A US69617957A US2979141A US 2979141 A US2979141 A US 2979141A US 696179 A US696179 A US 696179A US 69617957 A US69617957 A US 69617957A US 2979141 A US2979141 A US 2979141A
- Authority
- US
- United States
- Prior art keywords
- drill
- unit
- hole
- trench
- shaft
- 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 - Lifetime
Links
- 238000005553 drilling Methods 0.000 description 10
- 230000009975 flexible effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- BHELIUBJHYAEDK-OAIUPTLZSA-N Aspoxicillin Chemical compound C1([C@H](C(=O)N[C@@H]2C(N3[C@H](C(C)(C)S[C@@H]32)C(O)=O)=O)NC(=O)[C@H](N)CC(=O)NC)=CC=C(O)C=C1 BHELIUBJHYAEDK-OAIUPTLZSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000014443 Pyrus communis Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/26—Drilling without earth removal, e.g. with self-propelled burrowing devices
Definitions
- This invention relates generally to drilling apparatus and finds particular utility in drilling small diameter holes, for gas lines for example, between streets and sidewalks, or the like, where a starting trench of only very limited size is available in which to insert and operate the drilling unit.
- the access hole for the drilling equipment is often, limited by existing sidewalks, buildings or paved streets.
- the only space available for a starting and a finishing trench at the ends of such a hole is between the curb of the street and the sidewalks.
- This space may only be two feet long and conventional practice, for drilling a hole under a street for the insertion of a gas 'line of one or one and one-half inches in diameter, has often necessitated removal of some existing concrete.
- a compact and efiicient drilling apparatus is provided that can be operated from the surface of the ground and a hole beneath the street can be drilled in incremental lengths as the drive unit for the drill is moved forward and back in a relatively small access hole.
- the invention contemplates a unique method for drilling such a hole, in which the drill pulls itself through the earth and simply compresses the earth to form the hole rather than removing the spoil from the hole.
- the drill and its sectioned drive shaft may be removed at the terminal end of the hole and the pipe, for example, flex ible tubing, is finally pulled through the formed hole by being attached to the last drive shaft section.
- Figure 1 is an elevational, sectional view taken transversely through a street and showing a drilling operation performed in accordance with this invention
- FIG 2 is an enlarged view of the right angle drive unit shown in Figure 1, but with its cover plate removed;
- Figure 3 is an enlarged view of the drill head
- Figure 4 shows a connection between the drive shaft sections as shown in Figure 1, but on an enlarged scale.
- the invention has been shown by way of illustrating the invention, as used where it is desired to drill a small hole under a paved street and the only space for access trenches is between the curbs of the street and the adjacent sidewalks.
- the space between the curbs C of the paved street S and the sidewalks W may be only in the order of three feet which would be too small to accommodate the entire drill unit 10.
- the required depth at which these holes are often drilled for gas lines or the like is on the order of two and one-half or three feet.
- An access trench 12 is dug on one side of the street at the starting side of the hole and a similar trench 13 States Patent is dug across the street at a point where it is estimated the drill will emerge.
- the drill D used for this operation is shown in Figure 3 and comprises a long gradually tapered body having a tapered screw flight 14 of increasing radial depth which pulls itself into, the material being drilled, in a corkscrew manner, when it is rotated'
- the drill also includes a cylindrical portion 15 which acts to compress the sides of the hole as it passes therethrough.
- Thecompacter 15 has front and rear beveled edges 16 and 17, respectively, which facilitate passage of the drill through the ground.
- the forward beveled face 16 of the compacter 15 converges into the rear end of the tapered drill body.
- the drill does not remove spoil from the hole but pulls itself into the earth by the lead angle of its flight 14 and leaves a hole in its path of the diameter of its drum section 15.
- the drill has a rear stub shaft 18 having two apertures 19 therethrough which are adapted to receive attaching pins 20.
- the drive shaft sections 22 each comprise an end having a collar 23 welded thereon and containing apertures 24.
- the other end of the shaft sections have a male portion 25 which is adapted to fit into the collar 23 and be secured therein by locking pins 20 extending through apertures 26.
- Collar 23 also is adapted to receive the shaft portion 18 of the drill.
- the shaft sections 22 are of such a length so as to fit within the trenches 12, 13.
- the power unit 10 shown for illustrative purposes comprises an air motor 27, an operators handle 28, and a conduit 2? for. attachment to a source of compressed air (not shown).
- the unit 10 has a drive shaft 30. extending downwardly therefrom.
- the unit is usually large, heavy and generally cumbersome and could not be operated in trenches of the type involved in this disclosure. Thus the source of power for rotating the drill must remain above the surface of the ground.
- a right angle gear unit 32 is provided for transmitting power from the power shaft 30 to the drill shaft 22 and which slides along the bottom of the trench to follow the drill as it pulls itself into the ground.
- the gear unit is enclosed and comprises a substantially square steel housing formed by front, rear, top and bottom walls, 33, 34, 35 and 36, respectively.
- the housing also includes side walls 37, 38, which may be removable by cap bolts 40 for lubricating and repair of the unit.
- a runner or sled 41 is secured by bolts 42 to the bottom of the unit and has an upturned front and rear edge 43, 44 to facilitate pulling of the unit back and forth on the bottom of the trench.
- the skid 41 forms a good bearing surface for the weight of the power unit which it supports.
- the unit 32 also includes a mounting bracket 45 bolted within the housing by bolts 46.
- a stub shaft 47 extends through the bracket 45 and out the front side of the housing.
- the inner end of shaft 47 has a bevel gear 50 secured thereto which is in constant mesh with bevel gear 51.
- Gear 51 is rigidly secured to shaft 52 which at its upper end 53 is of non-circular cross section and has apertures 54 extending therethrough.
- the drive shaft 30 of the power unit is adapted to slip over the shaft 52 and is complementary thereto so as to form a driving connection therewith, also being held in driving relationship by pins 55 insertable in the aligned apertures in shafts 52 and 30.
- Grease fittings 56 are provided within the housing for the shafts 47 and 52.
- a block and tackle 6! is anchored or otherwise secured in the terminal trench 13 and has pulleys 61, 62 over which is trained the flexible member 63 which can afford a mechanical advantage in the conventional manner.
- the unit 32 would then be disconnected from the first section 22, slid back to the starting position and the process repeated. Sufficient drive shaft sections 22 would be added until the drill D began to emerge into the trench 13. The drill D would then lose its bite and would be incapable of further forward movement due to its own rotation.
- the unit 32 would be disconnected from the rear end of the last drive shaft section and instead a section of gas pipe or the like fastened thereto.
- Flexible copper tubing commonly used in this installation would also be attachable to the drive shaft end.
- the flexible member 63 would then be attached to the drill D and the block and tackle then operated manually or by a hand winch or the like to pull the drill into the trench 13. After disconnecting the drill D from the first drive shaft section, the flexible member 63 would then be attached successively to theshaft sections and the latter likewise pulled through the hole by the block and tackle. Finally the pipe, sections of which had been added in trench 12 as it was pulled through the hole, or the flexible tubing would also emerge from the drilled hole.
- Apparatus for drilling a horizontal hole in the earth comprising a drill member of substantial length with a v gradually tapered conical body and an additionally tapered screw flight of increasing radial depth spirally disposed therealong for substantially the length thereof and secured thereto, a cylindrical compacter at the trailing end of said member and having a diameter corresponding substantially to the largest diameter of said tapered flight and a forward face converging forwardly to the rear end of said conical body, and means coupled to the trailing end of said member and of substantially smaller diameter than said compacter to secure the member to a rotary drive, said apparatus being characterized by progressive compacting of the earth outwardly to form a hole as the flight screws its way through the earth.
Description
April 11, 1961 c. w. KANDLE 2,979,141
EARTH BORING APPARATUS Filed Nov. 13, 1957 2 Sheets-Sheet 1 5 y g wmg n INVENTOR.
k M wm A Tree/v5 Y5 April 11, 1961 w. KANDLE 2,979,141
EART'H' BORING APPARATUS Filed Nov. 13, 1957 2 Sheets-Sheet 2 INVENTOR.
OHHRLEj VV. KHNDAE BY ATTORNEY.
EARTH BORING APPARATUS Charles W. Kandle, La Grange Park, Ill. (1845 S. 55th Ave., Cicero, Ill.)
Filed Nov. 13, 1957, Ser. No. 696,179
1 Claim. (Cl. 175-19) This invention relates generally to drilling apparatus and finds particular utility in drilling small diameter holes, for gas lines for example, between streets and sidewalks, or the like, where a starting trench of only very limited size is available in which to insert and operate the drilling unit.
In many drilling operations the access hole for the drilling equipment is often, limited by existing sidewalks, buildings or paved streets. Where it is necessary to install a gas line beneath the street, for example, the only space available for a starting and a finishing trench at the ends of such a hole is between the curb of the street and the sidewalks. This space may only be two feet long and conventional practice, for drilling a hole under a street for the insertion of a gas 'line of one or one and one-half inches in diameter, has often necessitated removal of some existing concrete.
In accordance with the present invention, however, a compact and efiicient drilling apparatus is provided that can be operated from the surface of the ground and a hole beneath the street can be drilled in incremental lengths as the drive unit for the drill is moved forward and back in a relatively small access hole.
The invention contemplates a unique method for drilling such a hole, in which the drill pulls itself through the earth and simply compresses the earth to form the hole rather than removing the spoil from the hole. The drill and its sectioned drive shaft may be removed at the terminal end of the hole and the pipe, for example, flex ible tubing, is finally pulled through the formed hole by being attached to the last drive shaft section.
Other objects and advantages of the invention will ap pear hereinafter as this disclosure progresses, reference being had to the accompanying drawings in which:
Figure 1 is an elevational, sectional view taken transversely through a street and showing a drilling operation performed in accordance with this invention;
Figure 2 is an enlarged view of the right angle drive unit shown in Figure 1, but with its cover plate removed;
Figure 3 is an enlarged view of the drill head; and
Figure 4 shows a connection between the drive shaft sections as shown in Figure 1, but on an enlarged scale.
Referring more particularly to Figure 1, the invention has been shown by way of illustrating the invention, as used where it is desired to drill a small hole under a paved street and the only space for access trenches is between the curbs of the street and the adjacent sidewalks. The space between the curbs C of the paved street S and the sidewalks W may be only in the order of three feet which would be too small to accommodate the entire drill unit 10. The required depth at which these holes are often drilled for gas lines or the like is on the order of two and one-half or three feet.
An access trench 12 is dug on one side of the street at the starting side of the hole and a similar trench 13 States Patent is dug across the street at a point where it is estimated the drill will emerge.
The drill D used for this operation is shown in Figure 3 and comprises a long gradually tapered body having a tapered screw flight 14 of increasing radial depth which pulls itself into, the material being drilled, in a corkscrew manner, when it is rotated' The drill also includes a cylindrical portion 15 which acts to compress the sides of the hole as it passes therethrough. Thecompacter 15 has front and rear beveled edges 16 and 17, respectively, which facilitate passage of the drill through the ground. The forward beveled face 16 of the compacter 15 converges into the rear end of the tapered drill body. The drill does not remove spoil from the hole but pulls itself into the earth by the lead angle of its flight 14 and leaves a hole in its path of the diameter of its drum section 15. The drill has a rear stub shaft 18 having two apertures 19 therethrough which are adapted to receive attaching pins 20.
The drive shaft sections 22 each comprise an end having a collar 23 welded thereon and containing apertures 24. The other end of the shaft sections have a male portion 25 which is adapted to fit into the collar 23 and be secured therein by locking pins 20 extending through apertures 26. Collar 23 also is adapted to receive the shaft portion 18 of the drill. The shaft sections 22 are of such a length so as to fit within the trenches 12, 13.
The power unit 10 shown for illustrative purposes comprises an air motor 27, an operators handle 28, and a conduit 2? for. attachment to a source of compressed air (not shown). The unit 10 has a drive shaft 30. extending downwardly therefrom. The unit is usually large, heavy and generally cumbersome and could not be operated in trenches of the type involved in this disclosure. Thus the source of power for rotating the drill must remain above the surface of the ground.
A right angle gear unit 32 is provided for transmitting power from the power shaft 30 to the drill shaft 22 and which slides along the bottom of the trench to follow the drill as it pulls itself into the ground. In operation, the gear unit is enclosed and comprises a substantially square steel housing formed by front, rear, top and bottom walls, 33, 34, 35 and 36, respectively. The housing also includes side walls 37, 38, which may be removable by cap bolts 40 for lubricating and repair of the unit. A runner or sled 41 is secured by bolts 42 to the bottom of the unit and has an upturned front and rear edge 43, 44 to facilitate pulling of the unit back and forth on the bottom of the trench. The skid 41 forms a good bearing surface for the weight of the power unit which it supports.
The unit 32 also includes a mounting bracket 45 bolted within the housing by bolts 46. A stub shaft 47 extends through the bracket 45 and out the front side of the housing. The outer end of the shaft 47 is hollow and is adapted to receive the end portion 25 of the drive shaft section 22, which is securable therein =by pins 20 which extend through aligned apertures 48 and 26. The inner end of shaft 47 has a bevel gear 50 secured thereto which is in constant mesh with bevel gear 51. Gear 51 is rigidly secured to shaft 52 which at its upper end 53 is of non-circular cross section and has apertures 54 extending therethrough. The drive shaft 30 of the power unit is adapted to slip over the shaft 52 and is complementary thereto so as to form a driving connection therewith, also being held in driving relationship by pins 55 insertable in the aligned apertures in shafts 52 and 30. Grease fittings 56 are provided within the housing for the shafts 47 and 52.
A block and tackle 6!) is anchored or otherwise secured in the terminal trench 13 and has pulleys 61, 62 over which is trained the flexible member 63 which can afford a mechanical advantage in the conventional manner.
Operation At the beginning of the operation, if the trench is too small to accommodate the drill D and a shaft section 22, the drill alone would be attached to the stub shaft 47 of the drive unit when the latter was in the position shown in Figure 1. The unit 10 would then be started and the unit 32 pushed to the left as viewed in Figure 1, or toward the wall to be drilled. After the drill had substantially buried itself, its rotation would be stopped and the unit 32 disconnected therefrom. The unit 32 would then he slid back to the starting position, or to the right, where a section 22 of drive shaft would be inserted between the unit 32 and the drill D. The motor 27 would again be started which would cause the drill to penetrate farther and pull the first section 22 into the hole behind it. The unit 32 would then be disconnected from the first section 22, slid back to the starting position and the process repeated. Sufficient drive shaft sections 22 would be added until the drill D began to emerge into the trench 13. The drill D would then lose its bite and would be incapable of further forward movement due to its own rotation.
At this point the unit 32 would be disconnected from the rear end of the last drive shaft section and instead a section of gas pipe or the like fastened thereto. Flexible copper tubing, commonly used in this installation would also be attachable to the drive shaft end.
The flexible member 63 would then be attached to the drill D and the block and tackle then operated manually or by a hand winch or the like to pull the drill into the trench 13. After disconnecting the drill D from the first drive shaft section, the flexible member 63 would then be attached successively to theshaft sections and the latter likewise pulled through the hole by the block and tackle. Finally the pipe, sections of which had been added in trench 12 as it was pulled through the hole, or the flexible tubing would also emerge from the drilled hole.
Various modes of carrying out the invention are contemplated as being within the scope of the following claim particularly pointing out and distinctly claiming the subject matter which is regarded as the invention.
I claim:
Apparatus for drilling a horizontal hole in the earth comprising a drill member of substantial length with a v gradually tapered conical body and an additionally tapered screw flight of increasing radial depth spirally disposed therealong for substantially the length thereof and secured thereto, a cylindrical compacter at the trailing end of said member and having a diameter corresponding substantially to the largest diameter of said tapered flight and a forward face converging forwardly to the rear end of said conical body, and means coupled to the trailing end of said member and of substantially smaller diameter than said compacter to secure the member to a rotary drive, said apparatus being characterized by progressive compacting of the earth outwardly to form a hole as the flight screws its way through the earth.
References Cited in the file of this patent UNITED STATES PATENTS 139,566 Fritz etal. June 3, 1873 2,136,152 Parrish Nov. 8, 1938 2,524,262 Kandle Oct. 3, 1950 2,639,931 Kandle May 26, 1953 2,788,234 Doyle Apr. 9, 1957
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US696179A US2979141A (en) | 1957-11-13 | 1957-11-13 | Earth boring apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US696179A US2979141A (en) | 1957-11-13 | 1957-11-13 | Earth boring apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US2979141A true US2979141A (en) | 1961-04-11 |
Family
ID=24796028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US696179A Expired - Lifetime US2979141A (en) | 1957-11-13 | 1957-11-13 | Earth boring apparatus |
Country Status (1)
Country | Link |
---|---|
US (1) | US2979141A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3840079A (en) * | 1972-08-14 | 1974-10-08 | Jacobs Ass Williamson K | Horizontal drill rig for deep drilling to remote areas and method |
DE2548637A1 (en) * | 1975-03-03 | 1976-09-16 | Carmet Co | METHOD AND DEVICE FOR DRILLING WORK IN THE TOP MOUNTAIN |
US4009760A (en) * | 1975-03-03 | 1977-03-01 | Carmet Company | Apparatus for roof drilling |
US4086972A (en) * | 1976-05-06 | 1978-05-02 | Carmet Company | Method and apparatus for roof drilling |
US4135588A (en) * | 1977-11-21 | 1979-01-23 | Schreves, Inc. | Boring and compacting tool |
US4456078A (en) * | 1980-10-23 | 1984-06-26 | Adam Arthur J L | Earth boring method and apparatus |
US4621698A (en) * | 1985-04-16 | 1986-11-11 | Gas Research Institute | Percussion boring tool |
GB2329200A (en) * | 1997-09-12 | 1999-03-17 | May Gurney | Piling auger |
GB2329204A (en) * | 1997-09-11 | 1999-03-17 | Bicc Plc | Earth auger |
US20100187010A1 (en) * | 2009-01-28 | 2010-07-29 | Gas Technology Institute | Process and apparatus for subterranean drilling |
US20180363804A1 (en) * | 2017-06-15 | 2018-12-20 | Kwon J. PARK | Boring Head for copper tubing |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US139566A (en) * | 1873-06-03 | Improvement in machines for introducing water and gas pipes | ||
US2136152A (en) * | 1937-01-16 | 1938-11-08 | Margaret Parrish | Method and means for installing drainage conduits |
US2524262A (en) * | 1947-03-24 | 1950-10-03 | Charles W Kandle | Drill guide |
US2639931A (en) * | 1949-01-06 | 1953-05-26 | Charles W Kandle | Coupling for earth boring units |
US2788234A (en) * | 1952-05-19 | 1957-04-09 | Cedric J Doyle | Coupling unit |
-
1957
- 1957-11-13 US US696179A patent/US2979141A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US139566A (en) * | 1873-06-03 | Improvement in machines for introducing water and gas pipes | ||
US2136152A (en) * | 1937-01-16 | 1938-11-08 | Margaret Parrish | Method and means for installing drainage conduits |
US2524262A (en) * | 1947-03-24 | 1950-10-03 | Charles W Kandle | Drill guide |
US2639931A (en) * | 1949-01-06 | 1953-05-26 | Charles W Kandle | Coupling for earth boring units |
US2788234A (en) * | 1952-05-19 | 1957-04-09 | Cedric J Doyle | Coupling unit |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3840079A (en) * | 1972-08-14 | 1974-10-08 | Jacobs Ass Williamson K | Horizontal drill rig for deep drilling to remote areas and method |
DE2548637A1 (en) * | 1975-03-03 | 1976-09-16 | Carmet Co | METHOD AND DEVICE FOR DRILLING WORK IN THE TOP MOUNTAIN |
US4009760A (en) * | 1975-03-03 | 1977-03-01 | Carmet Company | Apparatus for roof drilling |
US4086972A (en) * | 1976-05-06 | 1978-05-02 | Carmet Company | Method and apparatus for roof drilling |
US4135588A (en) * | 1977-11-21 | 1979-01-23 | Schreves, Inc. | Boring and compacting tool |
US4456078A (en) * | 1980-10-23 | 1984-06-26 | Adam Arthur J L | Earth boring method and apparatus |
US4621698A (en) * | 1985-04-16 | 1986-11-11 | Gas Research Institute | Percussion boring tool |
GB2329204A (en) * | 1997-09-11 | 1999-03-17 | Bicc Plc | Earth auger |
GB2329204B (en) * | 1997-09-11 | 2001-07-25 | Bicc Plc | Earthworking equipment |
GB2329200A (en) * | 1997-09-12 | 1999-03-17 | May Gurney | Piling auger |
US20100187010A1 (en) * | 2009-01-28 | 2010-07-29 | Gas Technology Institute | Process and apparatus for subterranean drilling |
WO2010087944A1 (en) * | 2009-01-28 | 2010-08-05 | Gas Technology Institute | Process and apparatus for subterranean drilling |
US7814991B2 (en) | 2009-01-28 | 2010-10-19 | Gas Technology Institute | Process and apparatus for subterranean drilling |
US20180363804A1 (en) * | 2017-06-15 | 2018-12-20 | Kwon J. PARK | Boring Head for copper tubing |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2979141A (en) | Earth boring apparatus | |
US5580188A (en) | Method for replacing buried pipe | |
US1932068A (en) | Earth boring apparatus | |
US4401170A (en) | Apparatus for drilling underground arcuate paths and installing production casings, conduits, or flow pipes therein | |
MXPA98000447A (en) | Method for the replacement of pipe enterr | |
CA1287043C (en) | Screen placement method and apparatus | |
US1699936A (en) | Tunneling device | |
RU1836565C (en) | Method and installation for driving underground tunnels | |
US3402781A (en) | Sewer pipe installing machine | |
US9039330B1 (en) | Pipe boring shield | |
US5873421A (en) | Tool for installing a pipeline under a structure | |
US2946567A (en) | Casing installing machine | |
US4124082A (en) | Method of and apparatus for cutting a tunnel in plastic soil | |
US3612195A (en) | Earth-boring machine | |
US2136152A (en) | Method and means for installing drainage conduits | |
US9650833B2 (en) | Portable modular earth boring machine | |
US6179068B1 (en) | Directional drilling apparatus | |
US2625375A (en) | Horizontal rotary drill | |
US2973821A (en) | Rotatable earth borer | |
JP2534544B2 (en) | Existing pipe laying replacement method | |
JPS61228184A (en) | Method of construction of burying of flexible pipe | |
JP3019151B2 (en) | Drilling device and its drilling method | |
DE4223406A1 (en) | Underground drilling appts for domestic sewer pipe laying - is equipped with tubular extension pieces for advancing pipe sections and with clutch arrangements for extn from laid pipe | |
US4440240A (en) | Method of making holes in the soil and apparatus for performing this method | |
US2743085A (en) | Boring machine |