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JP4500203B2 |
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JP4482775B2 |
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JP4469738B2 |
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JP4456155B2 |
A method for casing drilling, a drilling unit and an adapter device. The adapter device to be used in extension drill equipment drilling comprises an inner piece which can be rotated by the rotation device of the rock drilling machine. A...
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JP4450422B2 |
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JP4437880B2 |
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JP4386844B2 |
A bit assembly for a drilling apparatus working by impact and rotation or merely by rotation, and comprising a pilot bit ( 1 ) drilling the hole centre and in connection with the pilot bit a ring bit ( 2 ) is arranged to drill the outer ...
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JP2009541617A |
The invention relates to a hydraulic rotary percussive device of the drill type, intended for drilling boreholes, comprising: a striking mechanism equipped with a piston which is able to move translationally along a striking axis and is ...
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JP4247480B2 |
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JP2009019463A |
To drill a continuous hole without bending in a drill with a guide rod having a drilling rod 4 hammered by a hammering part formed at a drifter and the guide rod 7 parallel to the drilling rod and drilling the continuous hole H2 arranged...
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JP2008297864A |
To provide a construction method of a cast-in-place pile that can carry out previous boring and pile driving in one step and carry out construction even with obstacles such as boulder stones.This construction method of the cast-in-place ...
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JP2008542594A |
A method and device for drilling, particularly percussion drilling or rotary percussion drilling a hole in soil or rock material and fixing an anchoring in the hole. To this end, a drilled hole is made by a drill bit mounted on a drill r...
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JP2008274723A |
To provide improved technology for driving an oscillating pile which is used in conjunction with an earth auger, which eliminates the need for a crane used exclusively for an auger, and which can strongly intrude a steel pipe pile into t...
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JP2008231806A |
To realize the improvement in work efficiency, certainty of work and reduction in work cost, in an excavator using a down-the-hole hammer.This excavator has an auger 3 suspended and supported by a work machine 1 and the down-the-hole ham...
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JP2008223324A |
To provide a test boring device capable of simply achieving the work for positioning this device for the center of excavation on the ground surface and to provide a cylindrical member for positioning used in the test boring device.The cy...
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JP4117294B2 |
Impact adapter for transfer of impacts and rotation from an impact rock drilling machine to a drill string comprising a first end ( 5 ) for connection to a drill string and a second end provided with ridges ( 7 ) and interposed grooves (...
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JP2008517779A |
The invention relates to a drill bushing for engagement with a drilling steel, wherein said drill bushing ( 2 ) has contact surfaces ( 4 ) for contact with a drilling steel ( 1 ), said contact surfaces ( 4 ) having interior, inwards curv...
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JP2008095276A |
To secure the quality of a continuous underground wall by eliminating a discontinuous portion when the continuous underground wall is formed and suppress the cost by eliminating the need of additional works by providing an excavator capa...
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JP4078265B2 |
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JP4076554B2 |
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JP4046851B2 |
A new masonry drill has a shaft (2) with clearing spirals (3), the tip (5) being entirely in hard material, bonded to the end face of the shaft. It comprises a main- (6) and auxiliary cutters (7, 8) each located along diagonals of the dr...
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JP4037742B2 |
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JP4009252B2 |
In a liquid downhole drilling machine, the guiding bushing ( 31 ) for the drill bit is rotatably journaled in the housing ( 11, 12 ) and, via a one-way coupling ( 29 ), coupled to a turning sleeve ( 22 ) that has axial ridges ( 24 ) that...
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JP4007216B2 |
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JP2007291693A |
To provide a rock bit apparatus with a striking mechanism, which has a compressed air feeding line and a second fluid pressure feeding line. The rock bit apparatus with the striking mechanism has arranged therein the compressed air feedi...
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JP4001346B2 |
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JP3135764U |
To provide a wire line core sampling device for a rotary percussion drill capable of reliably sampling a core on soft ground. An outer tube assembly to which a drilling bit for cutting out a core is attached at a lower end and a sampler ...
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JP3976187B2 |
A hammer drill (1) includes a lock plate (35) forward of a boss sleeve (13) and a swash bearing (14) which cooperates with the boss sleeve to convert the rotation of an intermediate shaft (5) on which the boss sleeve is mounted. The lock...
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JP2007211412A |
To efficiently construct an anchor for disaster prevention (fall prevention) even in a stratum of loose density where its surface layer easily falls. A downhole type excavating device comprises a moving mechanism (a frame, a guide rail a...
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JP3959004B2 |
To provide a drill head which maintains low-noise operation, improves the workability and drilling speed of a drill, and has a through-type structure, to thereby improve the efficiency of pipe insertion/withdrawal work of a drill rod. Th...
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JP3904612B2 |
An arrangement in a rock drill comprising a shank and a percussion piston and lifting sleeve for moving the shank towards percussion piston, and a method of controlling rock drilling. The arrangement comprises a lifting sleeve around the...
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JP2007032184A |
To provide a mobile apparatus for boring soil gas examination holes and capable of drilling holes for collecting samples for the examination of soil gas even if a location of examination is a covered location without physically applying ...
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JP3859523B2 |
To provide a cleaning swivel for use in a double-pipe excavating method employing a down-the-hole hammer, which can solve various problems. The cleaning swivel is formed of a top sub 2, an outer rod sub 3, an inner rod sub 4, and a swive...
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JP3855037B2 |
To provide a bounding stone removing method and a bounding stone removing device in a non-open-cut construction method for easily performing work for crushing a bounding stone. In this bounding stone removing method in the non-open-cut c...
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JP3843914B2 |
To regulate a percussive force by matching a drill bit to be used. A hammer drill includes an intermediate shaft 60 rotationally driven by a motor 2, a spindle 7 which transmits the rotation through the shaft 60, and a percussive impact ...
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JP2006291660A |
To improve workability of a natural slope stabilizing construction method, by reducing the size and weight by reducing a diameter of a double tube hole drilling device, while improving durability of the double tube hole drilling device, ...
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JP2006291659A |
To improve workability of a natural slope stabilizing construction method for stabilizing a slope by particularly minimally leaving a natural state as it is, by reducing the size and weight by reducing its diameter, by adopting a down-th...
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JP3770887B2 |
To smoothly discharge removed soil clogging in a discharge pipe by rotating only a screw during excavating work. This excavating device is structured to dispose the screw 12 provided with a spiral blade 11, in the discharge pipe 1, to ex...
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JP2006045773A |
To provide an underground jacking device capable of excavating in any direction of the ground, capable of easily boring a hole having a curved part, and capable of simplifying an aboveground side work assisting device, by adjusting the a...
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JP2006028988A |
To provide a device which forms a collection hole on the ground for collecting/inspecting gas or underground water in soil in a fire-ban area without using a temporary fireproof wall or a flameproof sheet.The device for forming the subst...
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JP3725365B2 |
To exhaust dug slime smoothly in a large calibre hole boring. When a natural ground is reinforced by burying a steel outer tube 24, a thrust, rotation, and hammering are transmitted to an inner tube rod 22 and a boring bit 20 through a s...
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JP2005320805A |
To produce easily at a low cost a pipe to be connected with a preceding pipe and connect easily the pipe with the preceding pipe only by using driving force of a hydraulic drifter.The rotational force transmitting fixture has an adapter ...
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JP3704604B2 |
To provide an inexpensive versatile drilling rig with a simple structure hardly generating a noise in spite of using a hammering by hammer and usable not only for excavation (drilling) but also for geological investigation or penetration...
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JP3700154B2 |
To provide a rotary percussion drill which is good in hammering efficiency, and includes a drill head device and component parts thereof which are hardly broken. There is provided a rotary percussion drill which is constructed by slidabl...
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JP2005527388A |
The hammer drill (1) comprises a body (2) containing an alternating impact piston (4) which slides under the effect of a main hydraulic supply circuit (22). The circuit also causes an annular stop piston (5) to slide in a body cavity (3)...
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JP3668854B2 |
PURPOSE: To make it possible to excavate a non-circular section by providing an excavator with a casing having a non-circular section, a rotary shaft, a hammer giving striking force to an excavation bit and cylinders for vibrating the ha...
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JP2005133381A |
To provide a ground drilling device capable of two functions of a percussion function and a vibration function without making device large and automatically switching over in accordance with the ground condition for drilling objects.The ...
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JP3647081B2 |
PURPOSE: To make effective use of the striking force of a striking mechanism using a simple structure so as to increase drilling speed by engaging an outer- periphery bit with an inner-periphery bit along the direction of an axis, and tr...
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JP2005105582A |
To prevent having influence of noises on a worker as a low noise, by carrying a vibration damper in a soil investigating site by passing through a narrow space of a degree capable of passing a person.An air damper 20 is equipped on both ...
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JP3635229B2 |
To eliminate inconveniences of damping of a striking force at the tip of a bored hole and damage of an inner rod, the inconveniences being caused by mutual interference and resonance of shock waves generated by a strike of an air hammer ...
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