SE537573C2 - Stigort drilling machine with changeable length, procedure and stigort drilling rig - Google Patents

Abstract

SUMMARY: Ladder drilling machine (1) including a body comprising a main frame (2) and a subframe (3) and a plurality connecting the main frame and subframe, support members (4), one between the main frame (2) and the subframe (3) at the front and Along the support members (4) rotatable rotator unit (5) for rotationally driving a drill string (10) through an area of the main frame (2), and torque transmitting support brackets (6), which are fixedly engaged with the rotator unit (5) and slidably mounted on the support members (5). 4) transmit torque from the rotator unit (5) to the body. The support members (4) are constituted by telescopic pillars (7,8), which allow a change of a distance between the main frame (2) and the auxiliary frame (3) and are clamed by the length of the frame (L, 1). The invention also relates to a method and a riser drilling rig.

Description

FIELD OF THE INVENTION The invention relates to a riser drilling machine for drilling action in at least one drilling direction including a body with a forward and rear drivable rotary drive unit for rotary drive unit. The invention also relates to a method for setting up a riser drill.

BACKGROUND OF THE INVENTION Ladder drilling rigs are known in the art, which are designed for drilling with felling in the direction of the riser drill body as well as for drilling with felling in the direction of the riser drill body. Ladder drills are used, among other things. a. when drilling, for example, shafts for ventilation and drainage, for locations for bottling, backfilling and excavation, as well as for slits and inlet pipes for hydropower plants.

In known riser drills, the drill string is driven axially and rotated by a rotator unit, which is supported by a body, arranged to transmit torque exerted by the rotator unit to, for example, the floor in a tunnel, where the machine is anchored.

After driving the drill string corresponding to the length of a drill string component, the rotator unit is backed up and a new shaped drill string component is drilled. Correspondingly, a drill string component is removed from the drill string when driving the drill string for reaming drilling.

Typically, riser drilling rigs in drilling directions both from the body (normally down) and towards the body by reaming drilling (normally up) act as such. It should be noted, however, that drilling with felling in the direction from the sawmill to the frame can take place in other directions below or upwards. The body of the well-known riser drilling machine is typically equipped with columns, which have sliding guides for axial sliding bearings connected to the rotator unit for ensuring torque transmission in connection with the drive in axial direction. Axial drive is usually provided by the known riser drill by a hydraulic cylinder arrangement, which may be located in connection with said longitudinal guide. The rotator assembly is usually a hydraulic rotary motor.

The} cal-Ida riser drills work selectively and are designed for size and capacity based on their intended applications.

On the market, riser drills, for example, are marketed under the name "Robbins" and with serial numbers 34,44,53,73 and others.

OBJECTS AND MOST IMPORTANT CHARACTERISTICS OF THE INVENTION It is an object of the present invention to provide a further development of known riser drills in the direction of obtaining a riser drill which can be more flexibly adapted to different application areas and places of operation.

This object is achieved in a machine of an initially named kind in that the support members consist of telescopic pillars, which allow a change of a distance between the main frame and the auxiliary frame and clamed of the length of the frame.

It should be noted that the length of the frame is variable between an extended condition, which corresponds to an operating condition of the riser drill and a contracted condition, in which the frame is axially shorter, and which is intended as a transport condition. It is within the scope of the invention that the body may be more or less extended so that it is expanded to different extents corresponding to a number of different operating conditions for the riser drill with different elongated body for work on the stables with more or less space for the machine and in collaboration with e.g. drill string components of varying length.

As a result, it is possible for the length of the second frame to be seen in the drilling direction, which entails great advantages in connection with the transport of the riser drill for installation at an insert site.

Due to the fact that the external length of the frame is reducible in this way, it is possible for the riser drilling machine according to the invention to be transported in a mine in transport locations of relatively smaller dimensions. This helps to reduce transport costs and makes it possible for a more rigid and more powerful riser drilling machine to be used in mines, otherwise the local area dimensions limit the size of the machines intended for operation.

The advantage is achieved that the mine's transport locations can be designed with smaller dimensions than what would otherwise be necessary due to the current machine size, which meant that a smaller amount of rock needed to be felled in the mine, and which has a significant advantage for the mine's economy.

Furthermore, it is possible that, given the same site sizes in a mine, it is possible to use a riser drill with a larger stroke, which means that longer drill string components can be used due to the increased stroke, which means the possibility of greater cutting and greater cutting. .

Already with reductions in the frame length by a 20%, significant gains are achieved as above, and such reductions 3 are fully possible according to the invention as well as even frame length reductions in excess of 25%.

It is preferred that the telescopic pillars be formed with a respective outer part connected to one of the main frame and the subframe and a respective inner part connected to the other of the main frame and the subframe. It is especially preferred that the telescopic columns are designed as manoeuvrable hydraulic cylinders, as a result of which a simple longitudinally adaptable body is obtained, which is longitudinally adjusted by suitable hydraulic water supply to these maneuverable hydraulic cylinders.

It is also preferred that the city stirrups comprise bearing portions comprising sliding bearings for co-operation with said respective inner part, which is typically externally formed with a suitable sliding surface.

The bearing portions of the support brackets are, then the respective outer parts are connected to the main frame, preferably offset seen in the said At least one drilling direction in relation to the rotator unit in the direction from the main frame. This makes it possible to ensure that the rotator unit can be advanced in a low-lying main frame without being obstructed by these respective outer parts.

Preferably, the rotator unit is drivable forward and backward along the support means by an array of force cylinders acting between the body and the rotator unit. Most preferred is that said power cylinders act between the main frame and the rotator unit.

Said power cylinders are preferably connected with the respective cylinder portions to said support brackets and to the respective piston rod portions with the main frame.

It is furthermore appropriate that the said power cylinders comprise more than two telescopic parts in order to ensure sufficient stroke. 4 The main frame of stability shells suitably has frame parts surrounding a central opening for the passage of the drill string.

The invention also relates to a method of setting up a riser drilling machine, which comprises: a frame comprising a main frame and a subframe and a plurality, the main frame and subframe connecting, support means, a rotatable unit rotatable between the main frame and the subframe for driving the rotary unit. a drill string through an area of the main frame, and torque transmitting support brackets, which are fixedly connected to the rotator unit and slidably aligned on the support means for transferring torque from the rotator unit to the body.

In the method according to the invention, a distance between the main frame and the subframe is reduced before transport to an operating stable, and the length of the claimed frame is reduced, for adaptation to a space in a transport trolley by changing the length of telescopic pillars constituting said support means.

At the operating station Okas, by renewing the length of the said telescopic pillar, the length of the frame to the length intended for the operation of the riser drill. Advantages corresponding to the above-mentioned advantages related to the machine according to the invention are relevant in the method according to the invention.

The invention also relates to a riser drilling rig including a power unit and a control system as well as a riser drilling machine as above.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail with reference to exemplary embodiments and with reference to the accompanying drawings, in which: Figs. 1 and 2 show a riser drill in perspective in two different layers, Fig. 3 shows the riser drill (in dashed lines). - jer) in Figs. 1 and 2 supported by a truck during a transport, Figs. 4 and 5 show alternatively designed riser drills with tvd resp. three support means, Fig. 6 shows a detail of the riser drilling machine in Figs. 1, 2 and 3 in more detail, and Fig. 7 schematically illustrates a block diagram of a sequence of a method according to the invention. 10 DESCRIPTION OF EMBODIMENT EXAMPLES Corresponding and similar elements in the various exemplary embodiments have the same reference numerals.

Fig. 1 shows a riser drilling machine 1, which has a body comprising a main frame 2 and a support frame 3, which are separated by four elongate support members 4, which are in the form of telescopic hydraulic cylinders with a respective outer part 7 and a respective inner part 8. The support members 4 are extendable by supplying a hydraulic fluid for varying the length of the support members 4. The riser drill 1 is shown in Fig. 1 in an extended lodge, in which the machine, after attachment to the ground and connection and activation of the drive feed equipment, is ready for operation.

Each support member is at its respective outer ends fixedly connected to the main frame 2 and the auxiliary frame 3 so that the outer part 7 of the support member 4 is fixedly connected to the main frame 2 and the respective inner part 8 is fixedly connected to the subframe 3. The connections between the support members 4 and the main frame 2 and the support frame 3 is torsionally rigid and stably challenged to enable the take-up of drive torque from a rotator unit 5, which is forward and rearward between the support frame 3 and the main frame 2 for rotational drive and axial drive of a drill string 10, which passes through a central opening 11. 6 2. The drill string is then drivable in a first drilling direction R1 for driving a drill bit (not shown) from the body and in a second drilling direction R2 for driving a drill bit towards the body. The rotator unit 5 is connected to a pair of stirrups 6, each of which has a respective bearing portion 13, which contains sliding bearings (not shown) for enclosing two of the inner parts 8 of the support members 4. In addition, each stirrup 6 has a fastening portion 14 (one shown) for interaction with a housing of the rotator unit 5.

The fastening portions 14 are offset axially (seen in a direction of the drill string 10) in relation to the bearing portions 13 a section 6.x to allow lowering of the rotator unit 5 between the outer parts 7 of the city members 4 in an advanced layer of the rotator unit 5 when it has approached the main frame. 2 and where said outer parts 7 of the support members 4 are located laterally of (radially outside / laterally in relation to) the rotator unit 5 seen along said drilling directions R1 and R2.

Furthermore, Fig. 1 shows two power cylinders 9 comprising three telescopic parts, 9 ', 9 ", 9"', of which an outer telescopic cylinder part 9 'is connected to or integrated with the respective stand bracket 6, and the innermost telescopic cylinder part 9 " is fixedly connected to the main frame 2.

Activation of the power cylinders 9 is driven by the rotator unit 5 and thus by the drill string 10 in the first drilling direction Ri, i.e. seen in Fig. 1, involved the supply of hydraulic fluid to the first working spaces (not shown) of the power cylinders 9 for driving the rotator unit 5 in the direction of the main frame 2.

Drilling in the other drilling direction R2, ie. as seen in Fig. 1, involving drive of the rotator unit 5 in the direction from the main frame 2 is achieved by supplying hydraulic fluid to other working spaces (not shown) of the power cylinders 9.

In the condition shown in Fig. 1, the riser drilling machine 1 is shown with the locating members 4 extended maximally with the stand brackets 6 and thus the rotator unit 5 in the most separated positions from the main frame 2. This layer corresponds to an operating layer for the riser drilling machine 1 as it is placed on the drilling or operating platform in question with the main frame 2 fastened (for example by bolts) to the base on the edge and set at the edge. Furthermore, a loose drill string component 10 "is shown, which is to be inserted into the drill string in and of itself, which is not further touched.

In the drilling process, after driving the drill string in the first drilling direction R1 corresponding to the length of a drill string component 10, the rotator unit is backed for pass-splicing of a new shaped drill string component 10 'on the drill string. Thereafter, operation of the drill string in the first drilling direction R1 is resumed with the required drill string and this procedure is repeated as many times as the intended half length requires.

Correspondingly, a drill string component 10 is removed from the drill string when driving the drill string in the second drilling direction R2 corresponding to the length of a drill string component. After this removal is through, the rotator unit is advanced in the first drilling direction R1 for connection to the shortened drill string and continued drive in the second drilling direction R2. This procedure is then repeated as long as the intended length requires.

Fig. 2 shows the riser drilling machine 1 in a second layer, in which the retaining means 4 are contracted so that the length of the riser drilling machine 1, 1, seen parallel to the drilling directions R1 and R2, is substantially reduced in relation to the dimension in axial direction, L, as shown in fig. The power cylinders 9 8 have driven the stirrups 6 in the direction of the main frame 2 so that the stirrups 6 abut against end faces of the outer parts 7 of the respective stirrup members 4.

The layer shown in Fig. 2 is a layer which is lamped, among other things. a. transport of the riser drill 1 through narrow places and the like. It also corresponds to a layer of the riser drill 1 in the retracted layer just after it has been paralyzed by a truck.

Fig. 3 shows the riser drilling machine 1 supported by a truck 15. As can be understood from Fig. 3, the riser drilling machine 1 is in its retracted, compact condition, which meant that transport can be carried out in relatively narrow places and tunnels.

The riser drilling machine 1 is shown in Fig. 3 supported by the truck 15 via a lower transport frame 16 cooperating with the main frame, which cooperates with the main frame 2 and via an additional transport frame 17, which cooperates with the auxiliary frame 3. The truck carried a construction 18 comprising engaging means for engaging said lower and upper transport frames 17 and 18.

Fig. 4 shows very schematically a riser drilling machine 1 in a plan view seen from above with a subframe removed for the sake of clarity. The alternatively constructed riser drill 1 shown in Fig. 4 has only two support members 4, which are placed diagonally in relation to a rotator unit 5.

Radially outside the two support members 4, seen from a rotation axis of the rotator unit 5, are aligned respective power cylinders 9. This location provides ample space for insertion and removal of drill string elements in a drill string bearing of the riser drill 1.

Fig. 5 shows very schematically another alternative challenge riser drilling machine 1 in a plan view seen from above and with a subframe removed for the sake of clarity. The riser drilling machine 1 shown in Fig. 5 has three support members 4, which are located radially outside and evenly distributed in relation to a rotator unit 5, seen from a rotation axis of the rotator unit 5. Two power cylinders 9 az 'placed diagonally in relation to the rotator unit 5.

In principle, the riser drills in Figs. 4 and 5 operate in the same manner as that shown in Figs. 1 and 2 with telescopic support means (not shown in Figs. 4 and 5). Handrails 6 with corresponding function are indicated by the male reference designation 6.

Fig. 6 shows, partly in section, a portion of a riser drilling machine 1 for illustration of the principle of how a three-part (with the parts 9 ', 9 ", 9"') telescopic power cylinder 9 for use in a riser drilling machine according to the invention can be constructed. This Fig. Shows a main frame 2, an auxiliary frame 3 and intermediate city members 4. A support bracket 6 connects the power cylinder 9 partly with a rotator unit 5, partly with a bearing arrangement for co-operation with the support means corresponding to what is described in connection with Figs. 1 and 2.

Fig. 6 schematically illustrates a block diagram of a sequence of a method according to the invention.

Position 20 indicates the start of the sequence.

Position 21 indicates that the length of the frame is reduced to accommodate a space in a transport carriage by changing the length of telescopic pillars constituting said support means.

Position 22 indicates the coupling of the body to a truck for transport to a stable.

Position 23 indicates parking and disconnection of the body from the truck at the operating station.

Position 24 indicates that in the operating room the length of the frame is increased to the length intended for the operation of the riser drill. Position 25 indicates the end of the sequence. The invention may be varied within the scope of the appended claims. The number of pillars can be from the number two and 10 up. In case the number exceeds tvA, the city jumpers can be arranged to cooperate with at least two but also with several of the telescopic pillars. It is preferred that the number of telescopic pillars be four and that each city bracket cooperate with each of these two telescopic pillars.

The change of the distance between the main frame 2 and the auxiliary frame 3 and clarmed by the length L, 1 of the frame can be provided by separate power means, or even by said power cylinders 9 after proper switching so that when housed or removed in the stable to act between the main frame 2 and the rotator unit 5 is temporarily switched to act between the main frame and the subframe. Other means of achieving this long-term change can also be used. It is required, however, that the city members produce hydraulic cylinders which are maneuverable to effect this change in length.

The main frame and the auxiliary frame may be designed differently and be connected to the city means in a different way from what is shown in the figures and described above. 11

Claims (12)

CLAIMS: A riser drilling machine (1) for drilling action in at least one drilling direction (R1, R2) including: - a body comprising a main frame (2) and an auxiliary frame (3) and a plurality of city members (4), which connect the main frame to the auxiliary frame and which extend parallel to said At least one drilling direction (R 1, R 2), 1. a rotator unit (5) which can be driven between the main frame (2) and the subframe (3), forwards and backwards along the support members (4) for rotational drive of a drill string (10) in said At least one drilling direction (R1, R2) through an area of the main frame (2), and 2. torque-transferring stirrups (6), which are fixedly connected to the rotator unit (5) and arranged slidably on At least two support members (4) for transferring torque from the rotator unit (5) to the body, drawn by 3. that the support members (4) are constituted by telescopic pillars (7,8), which allow change of a distance between the main frame (2) and the auxiliary frame (3) and clamed by the length of the frame (L, 1), seen parallel to said At least one drilling direction ( R1, R2). Ladder drill (1) according to claim 1, characterized in that the telescopic pillars (7, 8) are formed with a respective outer part (7) connected to one of the main frame (2) and the auxiliary frame (3) and a respective inner part (8). ) connected to the other of the main frame (2) and the subframe (3). Ladder drill (1) according to claim 2, characterized in that the telescopic pillars (7, 8) are designed as maneuverable hydraulic cylinders. 12 Ladder drill (1) according to claim 2 or 3, characterized in that the city stirrups (6) comprise bearing portions (13) comprising sliding bearings for cooperation with said respective inner part (8). Ladder drilling machine (1) according to claim 4, characterized in that the bearing portions (13) of the stirrups (6) are offset (Ax) seen in said At least one drilling direction (R) in relation to the rotator unit (5) in the direction of the main frame (2). Ladder drilling machine (1) according to any one of the preceding claims, characterized in that the rotator unit (5) is tram and Ater drivable along the support members (4) by a set of force cylinders (9) acting between the body and the rotator unit (5). A riser drill (1) according to claim 6, characterized in that said power cylinders (9) act between the main frame (2) and the rotator unit (5). Ladder drill (1) according to claim 6 or 7, characterized in that said power cylinders (9) with respective cylinder portions (9 ') are connected to said stand brackets (6) and to respective piston rod portions (9 "') with the main frame (2). ). Ladder drilling machine (1) according to any one of claims 6 - 8, characterized in that said power cylinders (9) comprise more than two telescopic parts (9 ', 9 ", 9). Ladder drill (1) according to one of the preceding claims, characterized in that the main frame (2) has frame parts surrounding a central opening (11) for passage of the drill string (10). 13 A method of setting up a riser drill (1) having a drilling action in at least one drilling direction (R1, R2), the riser drilling machine (1) comprising: 1. a body comprising a main frame (2) and an auxiliary frame (3) and a plurality, connecting the main frame and the subframe, support members (4), which extend parallel to the said At least one drilling direction (R1, R2), 2. a rotatable unit rotatable between the main frame (2) and the subframe (3) back and forth along the support members (4) (5) rotationally drives a drill string (10) in said At least one drilling direction (R1, R2) through a cmrAde of the main frame, and 3. moment-transmitting support brackets (6), which are fixedly connected to the rotator unit (5) and slidably mounted on at least two support members (4) for transmitting torque from the rotator unit (5) to the body, characterized by 4. that before transport to an operating stable a distance between the main frame (2) and the auxiliary frame (3), and thus the length of the body (1 ) i namnda Atminstone en drilling direction (R1, R2), the adaptation to a space in a transport path is reduced by changing the length of the telescopic pillars (7,8) constituting said support means (4), and 5. that at the operating number, by changing the length of said telescopic pillars (7,8), the length of the frame in the said At least one drilling direction (R1, R2) is increased to the length (L) intended for the operation of the riser drill. Ladder drilling rig including a power unit and a control system and a ladder drilling machine (1) according to any one of claims 1 - 10. 14