CA2939731A1

CA2939731A1 - Boring and drilling system for diamond drilling

Info

Publication number: CA2939731A1
Application number: CA2939731A
Authority: CA
Inventors: Eugenio Alfonso Fierro Ahumada; Cristian Adrian Rojas Ramirez; Rodrigo Andres Zuniga Castro
Original assignee: MAESTRANZA MINING PARTS LTDA
Current assignee: MAESTRANZA MINING PARTS LTDA
Priority date: 2014-02-14
Filing date: 2015-02-13
Publication date: 2015-08-20
Also published as: ZA201605751B; WO2015120566A1; AU2015218160A1; PE20161387A1; CL2014000375A1; AU2015218160B2; AU2019280082A1

Abstract

The invention relates to a drilling and boring system, a manipulating arm and a method for diamond drilling or a wireline comprising at least one tower, at least one rotary head and at least one rod rack (24), where each tower supports a column of rods through the rotary head and the rod rack at a defined angle, where the drilling system also comprises: a rod elevator system comprising a rod elevator system control unit, a working platform, railings around the periphery of the platform, access ladders, an inner tube tray and a sample tray, and an auxiliary control unit; a rod-manipulating arm; and a head rod arm.

Description

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BORING AND DRILLING SYSTEM FOR DIAMOND DRILLING
FIELD OF APPLICATION
The present invention relates to the drilling industry, drilling and exploration, in particular, a system to be installed on any machinery or equipment with applications in boring, drilling and exploration tasks, and particularly, a system associated with lifting and handling bars for drilling equipment.
BACKGROUND
Drilling soil and rock in the field of drilling is intended to make holes or wells according to established designs or geological meshes. These wells are drilled in order to:
- Know the quality of soil or rock, for Soundings Geomechanical.
- Know the quality or Mineral Law for Soundings Miners exploration or prospecting.
- To detect underground water, for Water Soundings.
The performance criteria are called systems drilling or cutting mechanisms.
This is how in the field of mining and civil works have been developed and mainly classified 2 systems drilling or cutting mechanisms, among others, for extraction geological sample, preferably using mechanical energy:
1. System "Air Reverse or Reverse Circulation (RC)", the rock is completely destroyed and detritus as geological sample is extracted by means of a cutting tool (Bit, hammer or tricone) and air compressors.

2. The second is called "Diamantina or Wireline (DD)" system, a core or witnessed the rock is removed.

For both techniques, prospecting and exploration, the material that is extracted is used = for analysis and determination of types, qualities (laws) and quantities of ore (t) for the exploitation of the deposit.
The main components of a Drilling System are:
1. Equipment or probe: It is the source that generates mechanical energy through its components, such as tower, head rotation, press bars, among others.
2. Drilling Tools: Includes drill rods or collar, which correspond to the transmission medium of mechanical energy, together with the crown or hammer, implement applying mechanical energy on the Rock.

3. The drilling fluid or scanning: Makes hole cleaning and evacuation of the witness or drilling detritus.
In the prior art different semi-automated systems that allow manipulation of drill rods to be mounted on their respective equipmetns are known.
The document US2009238663 describes a manipulator drill string including a movable holder and a system of position sensor for the manipulator, which in turn includes a level sensor which is configured to detect a position of the movable holder respect to gravity. The system further includes position sensor a rotation sensor configured to detect the rotational position of the movable holder with respect to a defined axis which is parallel to gravity. Additionally, the system includes a position sensor control center is communicatively connected to that level sensor and rotation sensor. The system does not describe a system that supplies and receives said bars so that the handler's place as part of the drilling rig.

The document US8186925 describes a system catheterisation comprising a drilling mast and a manipulator of drill pipe which is intended for mounting bars to the mast adjacent drilling, where the rod handling comprising: a base adapted to be supported from the base rig; a movable holder adapted to the base, which is configured to hold a bar from a storage position with a first orientation; a first motor to rotate the movable holder on a first axis which is parallel and inclined from the drill rod when the movable holder attached; a second motor to rotate the movable holder about a second axis to move the drill rod from the first orientation to a vertical orientation and a second orientation; a third motor to rotate the movable holder about a third axis to move the drill rod in a second position while holding drilling the drill rod in the second orientation;
and the third axis being parallel and inclined from the drill rod in the second orientation, wherein when the drill rod is in the second orientation, the third axis is parallel and inclined from the first axis when the drill is in the first orientation, the third axis is transverse to the. first axis. This document does not describe a system that allows the delivery and receipt of said bars to the place as the manipulator of the rig The document US2006 / 137910 describes a drilling machine which includes a frame, a rotary head and a handle bar device. The frame is supported for movement over the ground and the tower is mounted on the frame. The rotary head is movable through the tower and iS capable of engaging with the drillstring to rotate said string. The manipulator device is movable bars through the tower and selectively operable to hold the drill string. The manipulator device is predisposed bar to a first position along the tower. The manipulator system described by this document does not allow to take the bars from a horizontal position and mounted bars either withdraw and leave them in that position. Furthermore, no a system to supply and receive said bars The documents of the prior art described above correspond to equipment associated with drilling systems by reverse circulation (RC), which moves away to the solution proposed by the Invention TECHNICAL PROBLEM
In the current procedures for handling bar assembly and handling of drilling equipment, there are various complexities associated with such an operation.
During the operations themselves exploration, suspended loads of great volume and mass are generated, which are mainly in the loading bar and positioning bar machine probing, which are usually major cause of accidents, and consequently a for in the production process, reducing work efficiency.
In the process of probing or drilling, equipment or probes operated by qualified personnel they are used, which operate the machines and handling drill rods directly.
In this process, there are recurring accidents of various kinds and various considerations, the most common: Tips cuts, bumps product Entrapment, even death drop bars.
TECHNICAL SOLUTION
To solve the problems described above, an automated drilling occurs. Such automated drilling comprises a lifting bar system whose function is to transport drill rods or columns (preferably 3 or 6 meters long), and also allows you to load said bars for drilling procedure and take them out for tool change or transfer to another drilling point automatically, without manipulating or generate suspended loads. It individualizes this system one by one the bars in the drilling process, and then receives the bars or

4 removed from the well, cumulatively with other adjusting and aligning the horizontal position automatically. Further it comprises a platform to allow movement of operators and assistants team.
The system further comprises a manipulator arm and guide system. Its main function is to place and remove bars from the borehole together with the team and synchronized with the lifting bar system.
The manipulator arm receives individualized bar by the elevator system; then fixed focus and position the bar in the tower of the machine through the hydraulic press and the safety trigger, regardless of what the drilling angle. Finally the system screwed actuated or unscrewing of the rod as the operation of removing or meter bars, with the help of the guide through a "roller press" and a system of "sliding or floating"
corresponding to the action des-threading screw or drill two bars combining a displacement movement on the axis of drilling, to avoid damaging the thread or threads of the same.
The system further comprises an arm bar head, where the head bar corresponds to a set that is closest to the surface while drilling work is being done because it contains the system that delivers lubrication to the process, so that each time required to extend or trim the scope of drilling hanging bar, this bar is required uncoupling head to add or pick another drill .rod and then screw it back. It must perform this decoupling / coupling with the hanging bar whenever the inner tube, corresponding to the set of pieces that are located inside the drill rod that is performing the excavation and therefore contains withdraws the It shows the perforated ground. The function of the head arm bar is hold,

5 float, and remove or place the bar head with the injection head of the drill axis, revolving around a defined axis. Then you can remove the inner tube with the geological sample TECHNICAL ADVANTAGES
With regard to current operating procedures and handling drilling rods and described by the prior art documents, the system of the present invention has the following advantages - The system of the invention eliminates the direct intervention of operators at all stages of work, minimizing the chances of accidents.
- This system improves productivity because it shortens tool movement operation due to automation cycle drilling and / or catheterization.
- Reduces the number of workers / helpers directly involved in the operation, which reduces man-hours, taking result in lower costs and decrease the likelihood of accidents.
- Elimination of suspended loads, since it is not necessary to move the bars from the lectern to the truck to remove it from the site and vice versa. This is achieved through the lift bar system, which serves as a transport container and automatic bar loading.
- The platform operator / assistant, elevator built into the system bar, provides a safe and even surface for the work of the same.

6 BRIEF DESCRIPTION OF THE FIGURES
Figure 1 shows a Isometric view which plots the form of transfer bar elevator system and its position on the rig, corresponding to an embodiment of the invention.
Figure 2 shows the isometric view bar lifter installed on end position, corresponding to a system embodiment of the invention.
Figure 3 shows an isometric view individualized bar drilling riser bar ready to be received by the manipulator arm bar, corresponding to a system embodiment of the invention.
Figure 4 shows an isometric view sustained drilling bar, corresponding to an embodiment of the invention manipulator arm bar.
Figure 5 graphs a isometric view drill rod aligned with the axis of the manipulator arm drilling rod, corresponding to an embodiment of the invention.
Figure 6 Isometric view showing extraction system manipulator arm bar from the bar to the lift bar, corresponding to a system embodiment of the invention.
Figure 7 isometric view graph the bar head position after being removed from the drill axis by the head arm bar, corresponding to an embodiment of the invention.
Figure 8 isometric view, which individualizes the elevator system bar, showing a detail of the rocker and body lift bar, corresponding to an embodiment of the invention.
Figure 9 isometric view, which individualizes the manipulator arm bar, showing detail of its main systems, corresponding to an embodiment of the invention.

7 Figure 10 isometric view showing part of the tower and detail of the head arm bar and guide bar, corresponding to an embodiment of the invention.
Figure 11 isometric view, which individualizes the rocker and the cylinder body lift lift bar, corresponding to an embodiment of the invention.
DETAILED DESCRIPTION OF THE INVENTION
Rigs or probes comprise a plurality of components, including mainly lies a tower (25), at least one rotary head (23) and at least one press bar (24), among others.
In a preferred embodiment of the invention, the tower (25) is mounted on a rig or probe (not shown), anchored and pivoted, so that can rotate around the Z' axis (Figure 1) in a defined angle, preferably between 90 and 45 to the vertical axis (Figure 1), fulfilling the function of supporting a column of bars across the rotary head (23) and press rods (24), said angles.
The head rotation (23) is mounted on the tower (25), which serves to receive, coupling, screw, unscrew, and rotate the drill string around its longitudinal axis, in order to transmit the motion rotating the cutting tool, located at the tip or lower end of the drillstring. Additionally, said rotary head (23) slides along the tower (25), advancing and pushing the drillstring or hanging bar into the well drilling, as well as performing the reverse operation (pull and remove the hanging bar).
The press bar (24) is anchored in the bottom of the tower (25), which serves to hold the hanging bar and support the rotating head (23) when screwed and unscrewed it bars.

8 The usual technique of traditional drilling using a drilling rig or probe (not shown) containing the three components mentioned above, working as follows:
The process or drilling technique known as "diamond" or "wire line" starts when an assistant / operator screwed manually the injection head of water (not shown) to a bar or collar bar (first bar has at its end the cutting tool called crown) which are in horizontal position, on trestles or lecterns. Bars or collar are high and positioned by means of a cable from the main winch (not shown), until it is aligned with the working axis of the rotary head (23), then it grips the rod or collar to begin work penetration on the ground.
Once the head rotation (23) reaches the end of its route, you need to add another bar or collar, in order to deepen the well. For this task, the bar (24) press is closed and holding the drill rod, then the rotary head (23) short or unscrewed two drill rods and unscrewed a head bar (not shown) is being raised with the cable the main winch (not shown), leaving out the drilling axis by operators manually.
To continue and deepen the well drilling, it is necessary to add another bar or collera repeating the initial process or adding them one to one manually, up and in the spindle axis of rotation (23).
The first bar or collar having at its end the cutting tool, contains within an interior device known tube (not shown), which corresponds to a set of parts that are located inside the drill rod is effecting the excavation and thus containing the sample of drilled ground.
Once it is completely filled with samples, called witness, it is extracted from the well through cable winch wire line (not shown), leaving out the drilling axis by operators manually.

9 In a preferred embodiment of the invention, the drilling system performs various job streams, which when concatenated in different successions completely covers the wide range of options found in the mine. The sequences are:
- Transport.and positioning - Delivery bar to rig - Withdrawal of collars from the rig - Posture and retirement rod head The drilling system comprises a lifting bar (1), which is moved by a vehicle the point of drilling within the task, to place it in front of the rig or probe (not shown) system, as seen in the Figure 1.
The drilling system further comprises a manipulator arm rod (6), which is preferably attached structurally to the rig or probe (not shown), so that said manipulator arm rod (6) and the drilling equipment is move as a unit.
An operator / assistant manipulates a command bar lifter (21) system, allowing the deployment and outward extension of at least four lifting jacks (27), which fall to the ground, up the elevator bar system (1 ), in such a way that the vehicle can be removed from the work area. Subsequently, the lift rod (1) system is adjusted in the vertical and horizontal axis to the working position, leaving it aligned with respect to manipulator arm rod (6) (Figures 2 and 3).
With the same command (21), a working platform (2) is deployed, rotating it about the horizontal axis (-1-) (Figure 2), up to a horizontal position.

The lifting bar system (1) further comprises perimeter rails of platform (3), access stairs (4), a tray of the inner tube (17) and a tray sample (18) or operators /
assistants placed perimeter railings platform (3), access stairs (4) tray inner tube (17) and the tray displays (18) performing a movement range and leaving positioned to perform drilling work safely and comfortably, as you can be seen in figure 2.
Upon completion of the task, the reverse procedure is performed to remove the lift rod system (1) of the place.
The lifting bar system (1) further comprises a command assistant (20), from which the movements of ascent and descent in the vertical axis, a lifting body bars (8) which encloses handled a cylinder lifting bar (29), and a rocker (7) about the axis 13' (as can be seen in figure 3). With these movements, the group drill rod is raised to a trigger delivery bars (16) through an arm feeder / receiver bar (5), which supplies each bar to said trigger delivery bars (16). Subsequently, said trigger delivery bar (16) pushes up only one drill rod (9), which is deposited on the manipulator arm rod (6) on the shaft IR' (Figure 4).
In a preferred embodiment of the invention, the operator operates the hydraulic mechanism of the manipulator arm bar (6) which automatically initiates the sequence of closing and locking system press jaw (12), a closure system roller (11) and a safety trigger lock (10) to secure the bar. The system press jaw (12) comprises at least one press jaw cylinder (30) and a press cylinder roller (31) for securing the bar (9). Closing safety trigger (10) comprises a cylinder safety trigger (32) to adjust securing the drill rod (9) A second hydraulic actuator, the manipulator arm bar (6) rotates about the axis BM' from horizontal (Figure 4) to position the drilling tower (25) on the drilling axis P' (Figure 5).
A third hydraulic actuator, the manipulator arm bar (6) executes the following sequence automatically: opening press system jaw (12), rotation of the rollers of the roller system press (11) and simultaneously, by action a flotation system (13), moves down the drill rod (9) on the drilling axis 13', being guided at all times by a guide bar (15), ensuring alignment of the drill (9) with the bar or hanging bar preceding it (figure 5).
The operator, with a hydraulic mechanism, takes in sequentially and automatically opening roller press system (11), the opening of the safety trigger (10) and rotating the manipulator arm rod (6) about the axis BM µ, to leave it in a horizontal position. Thus, the manipulator arm rod (6) is ready to receive another drill rod (9) from the lifting bar (1) system and repeat the sequence.
The operator actuates a hydraulic mechanism, tilting the manipulator arm bars (6) around the axis BM' from horizontal (Figure 4) up to the vertical position (13' axis). Then the operator actuates another hydraulic mechanism running sequentially and automatically: closing press roller system (11) and safety trigger lock (10).
Once the drill rod (9) is trapped by these components, the operator runs a hydraulic control (own rig) cutting with the drill rod hangs. Then the operator performs simultaneously and automatically unscrewing (with press roller system (11)) and upward movement of the drill rod (9) on the drilling axis 13' (with flotation system (13)).
After disconnecting the drill rod (9) with the hanging bar, the operator swings the bar manipulator arm .(6) from the drill axis 13' (Figure 5) to the horizontal position (Figure 4), by rotating it BM' around the axis. Then another hydraulic mechanism opens sequentially and automatically, the press jaw (12), the roller press system (11) and safety trigger (10) system. At that moment, the operator executing another command, activates the rotation of trigger pull (26), rotating around the axis E
(Figure 6) leaving the drill rod (9) on the lifting bar system (1).
By a helper command (20) the downward movements are handled in the vertical axis of the lifting body bars (8), the wobbling of the rocker (7) and order /
accommodation of the drill rod (9) newly placed, by an alignment system bar (19).
In a preferred embodiment of the invention, the drilling system comprises a bar arm head (14), wherein the head (28) bar corresponds to the set that is closest to the surface while the drilling work is being done because it contains the lubrication system that delivers the. process, so that whenever required to extend or trim the scope of drilling hanging bar, this bar is required uncoupling head to add or pick another drill rod and then screw it back. The head bar (28) is screwed on the upper end an injection head of water, which in turn has a hose, allowing inject water with additives to drilling, lubricating the shaft and cutting tool (crown). The bar arm head (14) works together with the manipulator arm (6), as this arm bar head sticks his head bar that contains at its upper end the injection head of water, allowing the manipulator can get one by one bars or collars well.
In a preferred embodiment of the invention, the bar arm head (14) comprises at least one rotary cylinder rod arm head (33), a roller arm cylinder rod head (34) and an arm = roll bar head (35), which can be positioned, tighten and secure the head (28) bar.

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Posture and removal of the head (28) bar is performed whenever required:
change the cutting tool (crown), add or remove drill rods (9) and remove or place inner tube.
The operator actuates a hydraulic control (own rig) cutting or unscrewing the drill rod (9) with the hanging bar. Subsequently, through the main winch (own rig, not shown), the head bar (28) in the drilling axis P' rises, until it is level with the head arm bar (14).
Then the head arm bar (28) rotate around the axis BC' to the drilling axis P', then actuates the closing of its roll press, unscrewing and floating head (28) bar.
Finally the head arm bar (14) together with the bar head (28), revolves around the axis away from the axis BC' P' drilling and knocking him out of the work area, as seen in Figure 7.
Each of these movements is commanded by the operator from a hydraulic command (not shown).

Claims

1. Drilling system for diamond drilling or wire line comprising at least tower (25), at least one rotary head (23) and at least one bar (24) press, wherein said tower (25) holding a column bars through the rotary head (23) and press rods (24) at a defined angle, where the drilling system further comprising:
- A lifting bar (1) system, comprising a command bar lifter (21) system to extend at least at least four lifting jacks (27), a work platform (2), perimeter railings platform (3 ), access stairs (4), a tray inner tube (17) and a tray sample (18), and a command helper (20), from which movement of ascent and descent are handled in the vertical axis, a lifting body bars (8) the group of drill rod is raised to a trigger delivery bar (16), which drives up only one drill rod (9), which is deposited on a manipulator arm bar (6);
Manipulator arm rod (6) comprising a clamping system press (12), a closing roller system (11) and a closing safety trigger (10) to secure the bar, where the press system jaw (12) comprises at least one press jaw cylinder (30) and a press cylinder roller (31) for securing the bar (9);
- A bar arm head comprising at least one rotary cylinder rod arm head (33), a roller arm cylinder rod head (34) and an arm roll bar head (35) which can be positioned, tighten and secure the bar head (28), wherein said head arm bar shows the head bar (28) containing at its upper end an injection head of water, allowing the manipulator to remove one by one the bars or the shaft collars.

2. Drilling system for diamond drilling according to claim 1 wherein the bars (24) press is anchored at the bottom of the tower (25).

3. Drilling system for diamond drilling according to any of the preceding claims wherein th6 angle where said tower (25) maintains a distance bar through the rotary head (23) and press bar (24) is preferably between 45 and 90.

4. Drilling system for diamond drilling according to any of the preceding claims wherein the bar the manipulator arm (6), is preferably attached structurally to a rig

5. Drilling system for diamond drilling according to any of the preceding claims wherein the elevator bar (1) system, is adjusted in the vertical and horizontal axis to the working position, aligned with respect to leaving manipulator arm bar ( 6)

6. Drilling system for diamond drilling according to any of the preceding claims wherein the command (21), which displays the work platform (2), making it rotate around a horizontal axis (-T), until it is in position horizontal.

7. Lift bar system for a drilling system for Diamantina or Wire Line comprising a command bar lifter (21) system to extend at least four lifting jacks (27), a working platform system (2 ), perimeter railings platform (3), access stairs (4), a tray inner tube (17) and a tray sample (18), and a command helper (20), from which movements of ascent are handled and descent in the vertical axis, a lifting body bars (8) the group of drill rod is raised to a trigger delivery bar (16), which drives up only one drill rod (9), which is deposited on a manipulator arm rod (6).

8. The lift bar system according to claim 7, wherein the system is adjusted in the vertical and horizontal axis to the working position, leaving it aligned with respect to manipulator arm rod (6)

9. The lift bar system according to any of the preceding claims wherein the the command system (21), which displays the work platform (2), making it rotate around a horizontal axis (-T'), up to a horizontal position.

10. The lift bar system according to any of the preceding claims wherein comprises a feeder / receiver bar (5) arm each bar supplying said trigger delivery bars (16)

11. Manipulator arm rod (6) for a drilling system for drilling and probing Diamantina or wire line system comprising a press jaw (12), a closing roller system (11) and a safety trigger lock (10) to secure the bar, where the system press jaw (12) comprises at least one press cylinder jaw (30) and a roller press cylinder (31) for securing the bar (9), wherein said arm manipulator (6) delivers bars one by one or collars wellbore when a bar head arm shows a head bar containing at its upper end an injection head of water

12. Manipulator arm bar (6) according to claim 11 wherein the safety trigger lock (10) comprises a cylinder safety trigger (32) to adjust securing the drill rod (9).

13. Manipulator arm bar (6) according to any preceding claim wherein the manipulator arm bar (6) rotates about an axis BM' from the horizontal position to position the drill tower (25) in a drilling axis P'

14. Manipulator arm bar (6) according to any of the preceding claims comprising a floating system (13) which moves down the drill rod (9) on the drilling axis P'.

15. Manipulator arm bar (6) according to any of the preceding claims comprising a guide bar (15) which ensures alignment of the drill rod (9) with the bar or hanging

16. A head arm bar for a system for drilling and diamond drilling or probing wire line comprising at least one cylinder head arm pivot bar (33), a roller arm cylinder rod head (34) and a roller arm head bar (35) which can be positioned, tighten and secure the head bar (28), wherein the head arm bar (14) along with the head bar (28), revolves around an axis away from the axis BC' drilling P' and knocking him out of the work area, wherein said head arm bar shows the head bar (28) containing at its upper end an injection head of water, allowing the manipulator can take one to one the bars or collars well.

17. Method for drilling and probing for diamond drilling or wire line comprising the steps of:
a) Transport and position a lifting bar system (1) by drilling vehicle the point within the task, to place it in front of the rig or probe;
b) Manipulating a command bar elevator system (21) for the deployment and outward extension of at least four lifting jacks (27), which fall to the ground, raising the bar elevator system (1);
c) Remove the vehicle from the work area;
d) adjust the lifting bar system (1) in the vertical and horizontal axis to the working position, aligned with respect leaving a manipulator arm rod (6);
e) Deploying a work platform (2), making it rotate around a horizontal axis (-T'), up to a horizontal position;
f) Locate platform perimeter rails (3), access stairs (4); a tray of the inner tube (17) and a sample tray (18);
g) Driving through a command helper (20) moves up and down in the vertical axis, a lifting body bar (8), to raise the group drill rod until a trigger delivery bars (16 ) through a feeder / receiver bar (5) arm each bar supplying said trigger delivery bar (16);

h) Depositing a drill rod (9), which is deposited on the manipulator arm rod (6) in the R' axis;
i) Drive a hydraulic mechanism manipulator arm bar (6);
j) Actuating a second hydraulic drive for rotating the manipulator arm bars (6) around BM' axis from the horizontal position to the punching position of the tower (25) on the drilling axis P';
k) Actuating a third hydraulic actuator, so that the manipulator arm bar (6), perform the following automatically: opening a press system jaw (12), rotation of the rollers of the roller system press (11) and at the same time, by action of a flotation system (13), moves down the drill rod (9) on the drilling axis P';
l) Perform press roller opening system (11), opening the safety trigger (10) and turning the manipulator arm bar (6) around the axis BM', until it is horizontal;
m) Drive a hydraulic mechanism, tilting the manipulator arm bars (6) around the axis from the horizontal position BM';
n) The manipulator arm pivotable bar (6) from the drill axis P' to the horizontal position, by rotating around the axis BM';
o) Open sequentially and automatically, the press jaw (12), the roller press system (11) and safety trigger (10) system;
p) Controlled using the helper command (20) moves downward in the vertical axis of the lifting body bars (8), wobbling of the rocker (7) and order /
accommodation of the drill rod (9) newly placed, by bar alignment system (19);

q) Operate a hydraulic control cutting or unscrewing the drill rod (9) with the hanging bar;
r) Elevating the head bar (28) in the drilling axis P', until it is at the level of head arm bar (14);
s) Rotate the bar arm head (28) around an axis BC' to the drilling axis P;
t) Actuate closing your roller press, unscrewing and floating head (28) bar;
u) Rotate the bar arm head (14) together with the bar head (28) around the axis away from the axis BC' P' drilling and knocking him out of the work area.