FR2755709A1 - DRILLING DEVICE COMPRISING A DRILLING MACHINE - Google Patents

Abstract

The invention relates to a drilling device, in particular by means of a rotary drum cutter. The device comprises a platform (10) on which is mounted a boom (14) for supporting the drilling rig (32). Drums (22, 28, 30) are rotatably mounted on the platform to store a pipe (20) for raising the cuttings extracted by the machine, electric cables and hydraulic supply hoses (24, 26). These various cables and pipes (20, 24, 26) pass over grooved pulleys (50) mounted at the head of the boom (18). The axes of the pulleys are parallel to the axes of rotation of the storage drums (22, 28, 30).

Description

The present invention relates to a drilling device of the type

  comprising a drilling vehicle, in particular but not

  exclusively of the rotary drum type.

  More specifically, the invention relates to a drilling device or installation comprising a platform on which is mounted a support boom of the drilling machine and drums on which are wound electrical cables, support cables or flexible pipes to feed the different

  parts of the body of the drill rig itself.

  French Patent No. 2,696,768 discloses a drilling apparatus for producing trenches of the rotating drum type milling cutter in which the chassis carrying the rotary milling drums is pivotally mounted with respect to a support member suspended on an element of in such a way that the rotary milling drums can be guided at will with respect to a vertical axis. In such a drilling rig, there are in particular hydraulic motors for driving milling drums, electrical sensors for measuring certain parameters and for controlling the organs connected to the motor, and finally an axial suction pipe for cause the removal of cuttings as the action of the milling drums. These different members must be connected to sources of pressurized liquid or to electrical devices or, in the case of the suction pipe of the cuttings, to a system

of pumps.

  French Patent No. 2,696,767 also discloses an apparatus for digging deep trenches in the ground using milling drums, which is essentially characterized by the fact that all of the support means and feeding of the rotary drum milling machine is mounted on a platform supported by a running gear, so that the drill rig is completely autonomous and can be driven

  in working position independently.

  It is understood, however, that there is a problem of guiding and maintaining the flexible suction pipe cuttings, flexible pipes for supplying pressurized liquid and electrical cables between the rotary drums on which these cables or pipes are stored and their point of connection on the organ of

support of the drill rig.

  It is also understood that it is necessary for this guidance to be carried out under conditions such that the lines are not likely to be bent or pinched, which would disturb the power supply.

  in pressurized liquid or suction of excavated material.

  An object of the present invention is to provide a drilling device of the type mentioned above which includes provisions for guiding the various pipes and electrical cables to the drill rig as and when the

  the drilling machine in the trench under construction.

  To achieve this object according to the invention, the drilling device comprises: a platform, an arrow having a first end articulated on said platform and a second upper end, a drilling machine comprising a suspended support member at the second end of the boom and a frame having a vertical axis, said frame being pivotally mounted relative to the support member about the vertical axis, said frame having a cut rise pipe disposed along the vertical axis tubing for the circulation of fluids and electrical conductors, a first rotary drum on which is wound a flexible pipe intended to be connected to said pipe, said drum being rotatably mounted on said platform about a first horizontal axis, at least one second rotating drum on which flexible lines are wound and at least intended to be connected tubing, and / or 30. at least one electrical cable for connection to the electrical conductor, said second drum being rotatably mounted on

  said platform around a second horizontal axis.

  This drilling device is characterized in that it further comprises: a first pulley whose groove is adapted to receive said flexible pipe, said first pulley being pivotally mounted on said boom near its second end about a first axis; substantially parallel to the axis of said first drum; and at least one first set of pulleys whose grooves are respectively capable of receiving said flexible pipes and / or said electric cable, said set of pulleys being pivotally mounted on said boom near its second end about a second axis substantially parallel to the second axis of said second drum, said first and second axes of the pulleys not being

parallel to each other.

  It is understood that, thanks to the provisions of the invention, the different pipes or cables are guided by pulleys which are arranged at the boom head of the drilling device. These pipes or cables can therefore descend at the same time as the drill rig itself, while being guided parallel to the cable of

support of the drill rig.

  This avoids a tangling of these different pipes or cables and also avoids the risk of bending these pipes locally, which could disrupt the liquid supply of organs

  mounted on the drill rig.

  According to a preferred embodiment, the platform comprises two cable storage drums or flexible pipes and the upper end of the boom comprises a second set of pulleys. The axes of rotation of the storage drums and pulleys or pulley assemblies are such that the median planes of the storage drum and the associated pulley or set of pulleys coincide in such a way that the cables or lines "converge" with each other. level from the upper end of the arrow to the vertical pivot axis of the

  frame of the drill rig around its support member.

  With this arrangement, it optimizes the guiding of cables and pipes from their storage drum to their end

  connected to the support member of the drilling machine.

  Other features and advantages of the invention will become apparent

  better to read the following description of a preferred mode of

  embodiment of the invention given by way of non-limiting examples.

  The description refers to the appended figures in which:

  - Figure 1 is a side elevational view of the entire drilling device; - Figure 2 is a simplified view illustrating the mounting of the different return pulleys at the upper end of the boom; - Figure 3 is a schematic top view showing the various storage drums of cables and hoses and the return pulleys; - Figure 4 is a first perspective view at a first angle of the upper end of the boom equipped with different pulleys; and

  - Figure 5 is a similar view from another angle.

  Referring first to Figure 1, the various parts of the drilling device will be described. This essentially comprises a platform 10 mounted preferably on tracks 12, which makes the self-propelled assembly. On the platform 10 is articulated a lifting and supporting boom 14 whose lower end 16 is articulated on the platform 10 and whose end

  Upper 18 will later be called the arrowhead. On the platform

  form 10, there are also drums mounted rotatably on this platform for storing and allowing the unwinding on the one hand, a flexible pipe of relatively large diameter 20, this pipe being stored on the drum 22 and other two sets of flexible pipes of smaller diameter and cables respectively referenced 24 and 26, these two sets of cables and flexible pipes being stored on rotary drums referenced 28 and 30. The pipe 20 is used for the recovery of cuttings extracted by the rotary drums of the strawberry. Its internal diameter is typically

the order of 15 cm.

  This figure also shows the drill rig itself 32 which consists essentially of a frame 34 carrying the rotary milling drums 36, this frame having an upper end 38 which is mechanically connected to a support member 40 of so as to allow the rotation of the frame 34 about a vertical axis relative to the support member 40. As already indicated, the frame 34 comprises hydraulic motors, including drive strawberries 36 and components electric motors, particularly sensors or actuators for hydraulic motors. The frame 34 also comprises an axial pipe 42 which serves to remount the cuttings and the mud as and when they are extracted by the cutters 36. The various electrical conductors mounted on the frame 34 as well as the hydraulic lines and the riser pipe 42 are connected by described systems

  in the aforementioned documents, to the support member 40.

  In other words, the problem is to connect the flexible pipe of large diameter, the flexible pipes of reduced diameter and the electric cables to the support member 40, so that one avoids disorders in these different cables and conducts. In this simplified figure, there is also shown a muffle system 44 which allows support of the support member 40 at the upper end 18 of the boom 14 by allowing the downward movement of the drill rig as and when required. measurement of trench drilling. This figure also shows a capstan driven by a motor 46 for controlling the operation of the cable constituting the

  muffle 44 to allow the movements of the drill rig 32.

  According to the invention, all the cables and flexible lines 24 and 26, as well as the large-diameter flexible pipe 20 are guided between their respective storage drums and the support member 40 of the milling machine by pulleys. oriented grooves which will be described later in more detail. It suffices here to specify that these sets of pulleys bearing the reference 50 are pivotally mounted to

  near the arrowhead 18.

  Referring now to simplified figures 2 and 3, the guiding of the electrical cables and hydraulic lines between the storage drums 22, 28 and 30 and the gearing machine will be described in greater detail.

drilling 32.

  In the particular example described, the electrical cables and the flexible lines for the circulation of the pressurized liquid are divided into two layers, each sheet comprising for example four hydraulic flexible lines and an electric cable. Each of the

  two sheets is stored on one of the drums 28 and 30.

  FIG. 3 shows the storage drums 22, 28 and pivotally mounted with respect to the platform 10 about their respective axes 52, 54 and 56. In this embodiment, the axes on the one hand, of the drum 22 and on the other hand, the drums 28 and 30 are oriented such that the common median plane P of the drums 28 and 30 and the vertical median plane Q of the drum 22 intersect substantially along a vertical straight line substantially coinciding with the vertical axis of rotation of the frame of the drilling rig 32. This intersection line is schematized by the reference R. More specifically, the vertical planes P and Q are at an angle with the longitudinal direction of the frame 10 which of course contains the arrow 14. In order to ensure optimum guidance on the one hand, the large diameter pipe 20 and other On the one hand, flexible ducts and electric cables stored on the drums 28 and 30, on the one hand, are a grooved pulley 58 whose axis of rotation 60 is substantially parallel to the axis of rotation 52 of the drum 22. two sets of pulleys 62 and 64 whose axes of rotation 66 and 68 are substantially parallel to the common direction of the axes of rotation 54 and 56 of the drums 28 and 30. In addition, the center plane of the pulleys substantially coincides with the median plane of the corresponding storage drums. Thus, after their passage respectively on the grooved pulley 58 and the sets of the pulleys 62 and 64 on the one hand, the large diameter pipe and on the other hand, the cables and flexible pipes converge substantially towards the vertical axis

of rotation of the drill rig.

  FIG. 2 shows, in the vertical direction, the arrangement of the various rotary grooved pulleys mounted on the jib head 18. The first set of pulleys 64 is preferably disposed below the pulley 58 for the diameter pipe important, itself disposed below the set of pulleys 62

  for the second layer of flexible pipes and electric cables.

  The pulley 58 is arranged in such a way that the portion of the large-diameter pipe 20 coming out thereof is disposed along the axis of rotation Z-Z 'of the drilling machine. The sets of pulleys 62 and 64 are offset so that the pipes and cables of the first and second plies passing respectively on the sets of pulleys 62 and 64 are substantially disposed on either side of the pipe of large diameter 20, such that they are actually the right of the support member 40 of the drilling rig 32. Shown in this figure, in a simplified manner, the pulleys

  , 72, 74 and 76 corresponding to the guide of the lifting cable 44.

  FIGS. 4 and 5 show in greater detail the assembly of the pulleys 58, 62 and 64 as well as the pulleys associated with the lifting cable 44. The set of pulleys 62 has as many grooves as there are conduits flexible or electric cables on the web stored on the drum 30. The set of pulleys 64 corresponding to the storage drum 28 is in fact constituted by two sets of pulleys 64a and 64b, in order to achieve the horizontal offset necessary in view of the mechanical structure of the arrowhead. Each of the sets of pulleys 64a and 64b has of course an axis of rotation, these two axes being of course parallel to each other and parallel to the axis of rotation of the

drum 28.

  It is understood that, thanks to the provisions of the invention, both the flexible pipe of large diameter used for the recovery of cuttings as flexible pipes of smaller diameter used to supply the hydraulic motors of the drill rig, or still electric cables, all pass on pulleys mounted on the boom head 18 of the drilling device. In addition, the orientation and the position of the axes of rotation of the pulley assemblies 62 and 64 as well as the pulley 58 are chosen in such a way that they provide, on the one hand, good guidance in view of the orientation of the pulleys. storage drums 20, 28 and 30 and that they effectively ensure the convergence of the descending parts beyond. pulleys of electric cables and hydraulic lines or cuttings. This results in a progress of these different pipes and cables in synchronism with the descent of the drill rig, which avoids any disorder in the positions of these cables and pipes thus avoiding any risk of

  pinching, especially for large diameter pipe 20.

  It goes without saying that there could be more than two drums 28, 30 for storing flexible pipes and electric cables. It is important in this case that the axes of the sets of pulleys are parallel to the axes of rotation of the associated drums and that each "pair" set of storage drum-pulleys have substantially a common median plane and that these median planes intersect substantially according to the 'axis

  vertical rotation of the chassis of the drill rig.

Claims (7)

  A drilling device comprising: a platform (10), an boom (14) having a first end hinged to said platform and a second upper end, a drilling rig (32) comprising a support member (40) suspended at the second end of the boom and a frame (34) having a vertical axis, said frame being pivotally mounted relative to the support member about the vertical axis, said frame comprising a riser pipe; cuttings (42) arranged along the vertical axis, tubes for the circulation of fluids and electrical conductors, a first rotary drum (22) on which is wound a flexible pipe (20) intended to be connected to said pipe, said drum being rotatably mounted on said platform about a first horizontal axis, at least a second rotary drum (28,30) on which are wound flexible lines (24) and at least for be connected to the pipes, and / or at least one electric cable (26) intended to be connected to the electrical conductor, said second drum being rotatably mounted on said platform about a second horizontal axis, said device being characterized in that it further comprises: a first pulley (58) whose groove is adapted to receive said flexible pipe (20), said first pulley being pivotally mounted on said boom near its second end about a first substantially parallel axis; at the axis of said first drum; and - at least a first set of pulleys (62, 64) whose grooves are respectively able to receive said flexible pipes (24) and / or said electric cable (26), said set of pulleys being pivotally mounted on said boom in the vicinity its second end about a second axis substantially parallel to the second axis of said second drum, said first and second axes of the pulleys being not parallel to each other.   2. Drilling device according to claim 1 comprising a second second rotary drum (28,30) on which are wound flexible pipes (24) intended to be connected to said pipes and / or at least one electric cable (26) intended to be connected to the electrical conductor, said second second drum being rotatably mounted on the platform around a second second horizontal axis, characterized in that it further comprises a second set of pulleys (62, 64) whose grooves are intended receiving said flexible pipes and / or said cable, said second assembly being rotatably mounted on said boom near its second end about a second second axis substantially parallel to the axis of said second second drum.   3. Drilling device according to claim 2, characterized in that the axes of rotation of the first (28) and second second (30) drums are substantially parallel to each other, and in that the axis of the first drum (22) d on the one hand and the axes of the first and second second drums (28, 30) on the other hand are substantially at the same angle with the longitudinal axis of the platform,   said angle being less than 90 degrees.   4. Drilling device according to any one of the claims   2 and 3, characterized in that the median plane of the first drum (22) orthogonal to its axis of rotation coincides substantially with the median plane of the first pulley (58) orthogonal to its axis of rotation, and in that the median plane each second drum (28,30) orthogonal to its axis of rotation substantially coincides with the plane   median of the set of pulleys (62,64) associated with it.   5. Drilling device according to claim 4, characterized in that the axis of rotation of the first pulley (58) is arranged on the arrow (14) to a dimension between those of the axes of rotation of the sets of pulleys (62,64).   the 6. Drilling device according to claim 5, characterized in that the portion of the flexible pipe (20) extending beyond the first pulley (58) is substantially disposed along the vertical axis of   rotation of the frame (34) of the drilling rig (32).   Drilling device according to claim 6, characterized in that the portions of the flexible lines and / or electrical cables (24, 26) extending beyond said sets of pulleys (62, 64) are arranged around the part corresponding of said flexible pipe (20) substantially opposite said support member (40) of the drilling machine.