Classifications

• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
  • E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
  • E21B44/02—Automatic control of the tool feed
• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
  • E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
  • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
  • E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
  • E21B47/00—Survey of boreholes or wells
  • E21B47/04—Measuring depth or liquid level
• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
  • E21B47/00—Survey of boreholes or wells
  • E21B47/06—Measuring temperature or pressure
• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
  • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
  • E21B49/003—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by analysing drilling variables or conditions
• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
  • E21B7/00—Special methods or apparatus for drilling
  • E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
  • E21B7/022—Control of the drilling operation; Hydraulic or pneumatic means for activation or operation
• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
  • E21B7/00—Special methods or apparatus for drilling
  • E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
  • E21B7/025—Rock drills, i.e. jumbo drills

Definitions

• rock drilling drill holes are drilled to rock material or soil by means of rock drilling machines arranged to rock drilling rigs.
• the drill holes may be drilled in mines, quarries and construction work sites and the drill holes may be blast holes, reinforcing holes or drill holes having any other purpose.
• a collaring operation is performed to position a drilling tool end to a drilling position and subsequently performing a collaring drilling, which is typically drilled using reduced drilling power in order to ensure that the drilling will begin at the positioned point and to prevent curving of the drill hole and other problems relating to quality of the drill hole.
• a regular drilling operation is performed.
• present solutions relating to collaring have some disadvantages.
• the apparatus comprises one or more control devices or control units for controlling a drilling unit during a collaring drilling.
• the control device is provided with one or more collaring cycles and means for executing the collaring cycle in a processor or corresponding device.
• the collaring cycle comprises an advance drilling step and a reversing step, which may be both repeated alternately several times until a predetermined situation ensuring trouble-free initiation and execution of the actual drilling is reached.
• the collaring cycle may be an automatic sequence which may accomplish all the needed procedures for initiating drilling of the drill hole.
• the collaring cycle is also provided with a defined advance rule.
• the apparatus controls the drilling unit to advance the drilling in a drilling direction from a realized depth of the drill hole further to a following next depth.
• the apparatus is configured to control the drilling unit to direct flushing flow through a drilling tool to the drill hole dur- ing the collaring cycle.
• the flushing flow may be water or pressurized air, for example. Alternatively, mixture or water and air may be fed using great pressure to the drill hole.
• the apparatus may be configured to increase magnitude of the flushing flow in response to increase of the drilling depth.
• the flushing flow is greater during every following collaring cycle compared to the previous collaring cycles. Thanks to this embodiment sufficient flushing is ensured also when the circumstances require use of greater collaring depths.
• the apparatus is configured to terminate the flushing flow during the reversing step of the collaring cycle at a distance from the opening of the drill hole.
• a predefined threshold depth may be input to the control device of the apparatus.
• the flushing flow is terminated before a drilling tool is pulled out of the drill hole. Thanks to this embodiment, collapsing of the mouth of the drill hole may be prevented. If a full power flushing is directed to walls of the drill hole at the mouth portion of the drill hole, the walls will easily collapse.
• the apparatus is configured to control the drilling unit to direct liquid flow through a drilling tool to the drill hole during the reversing step of the collaring cycle.
• the feeding of flushing liquid may bind dust and other rock material on the walls of the drill hole and may thereby prevent collapsing of upper end portion of the drill hole.
• the bound walls allow feeding of charges and reinforcements into the drilled hole without prob- lems.
• the apparatus is configured to execute at least one additional advance drilling step and monitoring phase or step when detection of solid or hard rock material has been generated.
• the purpose of the additional step is to secure that the detection of the properties of the material was correct.
• the apparatus is configured to control the entire collaring drilling procedure without manual control. Then the first collaring cycle is initiated at the mouth of the drill hole to be drilled. The apparatus executes all the needed sequences automatically.
• the disclosed solution is implemented in surface drilling.
• the disclosed solution is implemented in drilling of reinforcing drill holes for rock bolts and other reinforcing members or material.
• Figure 6 is a schematic diagram showing additional features relating to the disclosed collaring cycle
• the control unit CU or ECU may be provided with one or more col- laring cycles CC1 - CC3 for controlling collaring drilling CD.
• the collaring drilling comprises several sequences which are repeated as many times it is necessary in order to reach rock material having sufficient material properties allowing initiating normal drilling. Typically reduced drilling parameters are utilized in collaring drilling CD.
• the monitoring means MD gather measuring data and may transmit the measuring data to the control device CU for further processing and determining the situation of the drilling procedure.
• a first monitoring device MD1 may be a measuring device for sensing vibrations and stress waves caused by impact pulses and reflecting stress waves.
• a second monitoring device MD2 may be an acoustic sensor for sensing sound and magnitude of the drilling noise.
• a third monitoring device MD3 may be a camera or scanner for measuring or sensing particles which have been flushed to the ground from a drill hole 9.
• Figure 1 further shows that the drilling unit 4 may comprise one or more measuring devices 13 for determining moving length of the rock drilling machine 6 and the drilling tool 8 during the operating.
• the produced measur- ing data may be used when determining lengths of an advance drilling step and reverse drilling step, as well as determining position of the existing drill hole bottom and level position data for controlling magnitude and termination of the flushing.
• Figure 1 discloses that in connection with the control device CU may be one or more timing devices or timers 14, which may be used for determining time periods for the advance and reverse drilling steps. The timer may also be used for determining a desired delay between successive collaring cycles CC1 - CC3.
• a computer program product for implementing the features disclosed in this patent application may be recorded in non-transitory computer- readable media including program instructions to implement various operations embodied by a computer.
• the media may also include, alone or in combination with the program instructions, data files, data structures, and the like.
• Exam- pies of computer-readable media or computer-readable storage devices include magnetic media such as hard disks, and optical media such as CR-ROM disks and DVDs, flash memory means, and hardware devices that are configured to store software.
• the computer-readable media may be a plurality of computer-readable storage devices in a distributed network, so that the pro- gram instructions are stored in a plurality of computer-readable storage devices and executed in a distributed fashion.
• the program instructions may be executed by one or more processors or processing devices.
• Figure 5 discloses some features relating to the disclosed collaring cycle. Further, Figure 6 discloses some additional features relating to the dis- closed collaring cycle. The features and issues relating to these Figures have already been discussed above in this patent application.

Landscapes

• Engineering & Computer Science (AREA)
• Geology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Mining & Mineral Resources (AREA)
• Physics & Mathematics (AREA)
• Environmental & Geological Engineering (AREA)
• Fluid Mechanics (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Geophysics (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Analytical Chemistry (AREA)
• Earth Drilling (AREA)

Applications Claiming Priority (1)

Publications (1)

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ID=53433199

Family Applications (1)

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• 2015
  • 2015-06-17 WO PCT/EP2015/063509 patent/WO2016202369A1/en not_active Ceased
  • 2015-06-17 AU AU2015398956A patent/AU2015398956A1/en not_active Abandoned
  • 2015-06-17 US US15/736,355 patent/US20180187540A1/en not_active Abandoned
  • 2015-06-17 EP EP15729832.4A patent/EP3310988A1/de not_active Withdrawn

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