摘要:
The invention provides a bore bit comprising a bottom part having an active bottom face and a top face substantially parallel to the active face; a top part fixed to suspension cables and having a bottom face facing the top face of the bottom part; means for limiting the maximum spacing between the two parts; a cylindrical axial bore passing through both parts; a cylindrical guide penetrating into said bore; and at least one ramp-forming recess and at least one ramp-forming extension for co-operating with said ramp-forming recess in such a manner that movement of the top part towards the bottom part is converted into rotary movement of said top part about the vertical axis, with the end of said rotary movement of the top part imparting rotary movement to the bottom part.
摘要:
The present invention relates to a drill string fitted with information transmission means. The hollow rods of conductive material have their inside faces covered in an insulating material. The transmission means comprise a first electrical unit having at least a first annular electrode secured to the insulating inside face of the drill string, said electrode being in electrical contact with the mud contained inside the drill string so as to establish a flow of current in the conductive mud; and a second electrical unit disposed in said borehole, close to the top end of the drill string in order at least to receive the information contained in said electrical current.
摘要:
Excavator drum for the production of vertical trenches, comprising a cylindrical shell (22) mounted so as to rotate about its axis of revolution and a plurality of excavating tools (28, 30) mounted on the external face of the said shell. The tools comprise a plurality of first rollers (36) equipped with cutting elements (38) mounted so as to rotate about axes, the mid-plane of the rollers substantially merging with the mid-plane (P-Pnull) of the shell, and the length of which is less than the length of the shell; and a plurality of pairs of second rollers (50, 52) equipped with cutting elements, the rollers of the same pair being mounted so as to rotate about cantilever axles (54, 56), each roller having a length at least equal to the distance that separates one end of a first roller from the corresponding end of the shell, the casing of the external end of the second rollers being at least in the plane containing one end (32, 34) of the shell.
摘要:
The invention relates to a method of boring a hole using a boring system constituted by a simple auger and a dip tube slidably mounted in said auger, said dip tube being provided at its bottom end with a tool. The method comprises the following steps: causing said auger and said dip tube to descend and to rotate simultaneously, said tool on the dip tube being substantially level with the bottom end of the auger; interrupting the descent and rotation of said auger so that the auger constitutes anchor means for anchoring the boring system in the ground; and causing the dip tube to descend and rotate on its own, whereby the tool of the dip tube performs boring by displacing ground at the bottom end of the borehole, thereby compacting the ground.
摘要:
The invention relates to a delayed-setting concrete based on blast furnace slag. The invention further relates to a method of initiating the setting of said concrete.
摘要:
The invention relates to equipment for drilling a vertical borehole in hard ground, the equipment comprising: casing put successively into place in the borehole; a drilling machine having a rotary cutting head and presenting a structural frame; torque and thrust transmission means having a first end secured to the structural frame of the drilling machine; and securing means for securing the second end of the torque and thrust transmission means in translation and in rotation to said casing.
摘要:
The invention provides a head for injecting a liquid under pressure from a borehole to break up the soil, said head being mounted at the end of a drill string including liquid feed means for feeding a liquid under pressure. The head comprises a body and an outside wall, the body having at least one injection nozzle mounted therein, the nozzle having an inlet diameter equal to d and presenting an axis x,xnull, the body also having duct-forming means. The duct-forming means present a mean line having a first end connected to the bottom end of the liquid feed means and having a second end connected to the nozzle tangentially to the axis x,xnull. The mean line is defined by at least one curved portion presenting a radius of curvature that varies continuously. The right section of the duct-forming means decreases regularly over at least half of its length from its first end to its second end.
摘要:
The invention relates to a trailer for a tunnel borer follower train. The trailer comprises a chassis provided with a plurality of wheels, said chassis at rest presenting a longitudinal axis and a longitudinal plane of symmetry that is vertical. The trailer also comprises at least two tanks mounted on the chassis substantially symmetrically about the longitudinal plane of symmetry of the chassis; means for measuring any tilt of the chassis of the trailer about its longitudinal axis; means for feeding both tanks with liquid; and means for controlling the quantity of liquid in each of the tanks as a function of any measured tilt in such a manner that the quantity of liquid contained in each tank creates a return torque about the longitudinal axis tending to compensate for any tilt of said trailer.
摘要:
The invention relates to a hollow drilling rod for transmitting information, said rod being for placing in a borehole filled with drilling mud. The rod comprises an electrically conductive cylindrical wall (521, 522) having an inside face, an outside face, a first end provided with a male coupling sleeve (62), and a second end provided with a female coupling sleeve (60), and being characterized in that it further comprises: a layer of electrically insulating material (70) covering the inside face over its entire length; and a conductive layer (80) covering said insulating layer and electrically connected at its ends to two electrically conductive rings, said conductive layer itself being covered by a second insulating layer (86) leaving said conductive rings in contact with the drilling mud.