WO2021251862A1 - Method and system for diagnosing an accumulator in a hydraulic circuit - Google Patents
Method and system for diagnosing an accumulator in a hydraulic circuit Download PDFInfo
- Publication number
- WO2021251862A1 WO2021251862A1 PCT/SE2021/050455 SE2021050455W WO2021251862A1 WO 2021251862 A1 WO2021251862 A1 WO 2021251862A1 SE 2021050455 W SE2021050455 W SE 2021050455W WO 2021251862 A1 WO2021251862 A1 WO 2021251862A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- hydraulic circuit
- flow variations
- accumulator
- representation
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000009527 percussion Methods 0.000 claims abstract description 95
- 238000005553 drilling Methods 0.000 claims abstract description 75
- 239000012530 fluid Substances 0.000 claims abstract description 37
- 238000013016 damping Methods 0.000 claims abstract description 35
- 239000011435 rock Substances 0.000 claims abstract description 31
- 230000033001 locomotion Effects 0.000 claims abstract description 22
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims description 13
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000004590 computer program Methods 0.000 claims 1
- 230000006870 function Effects 0.000 description 13
- 230000009471 action Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
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
- E21B44/06—Automatic control of the tool feed in response to the flow or pressure of the motive fluid of the drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
-
- 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
- E21B1/00—Percussion drilling
-
- 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
- E21B1/00—Percussion drilling
- E21B1/12—Percussion drilling with a reciprocating impulse member
- E21B1/24—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure
- E21B1/26—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by liquid 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
- 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
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/021—Installations or systems with accumulators used for damping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/005—Leakage; Spillage; Hose burst
Definitions
- the reciprocating action of the percussion device may be powered by pressurised hydraulic fluid, where the percussion piston is caused to accelerate and strike the drill tool by the pressurised hydraulic fluid, and where the hydraulic fluid may also cause the percussion piston to perform a return stroke to a position where, again, the piston will be accelerated to impact the drill string in a subsequent stroke.
- the reciprocating motion of the percussion piston is oftentimes accomplished by opening and closing hydraulic flows, which in turn give rise to pressure and/or flow variations in the hydraulic circuit.
- the one or more accumulators can be diagnosed, e.g. by a control system in a drill rig.
- a representation of the pressure and/or flow variations is determined. This may be performed in different ways. For example, a plurality of consecutive measurements of the pressure in the hydraulic circuit may be used to determine the representation of the pressure variations. Alternatively, e.g. a flow meter may be utilised to determine flow variations. Flow variations may also be determined using consecutive flow measurements, where the flow will be determined e.g. using pressure measurements from two pressure sensors in the hydraulic circuit with a known throttling of the flow between the pressure sensors. Such flow determination is well known in the art.
- a control system of the drill rig may be arranged to determine the reference representation, e.g., reference maxima and minima, through measuring during drilling when the accumulator is confirmed to be operating properly, and e.g. setting the machine to drill at one or more different percussion pressures. This may also be performed with regard to flow variations.
- the reference representation e.g., reference maxima and minima
- the representation of the maximum and/or minimum pressure or flow in the hydraulic circuit is determined using a difference between an upper and lower envelope of the pressure or flow variations in the hydraulic circuit. It is also contemplated that e.g. only an upper envelope is utilised.
- an amplitude of one or more harmonics of the pressure of flow variations is utilised as representation of the maximum and/or minimum pressure or flow in the hydraulic circuit.
- the harmonics may be determined using any suitable signal processing of the pressure or flow variations, where a suitable processing algorithm may be used in the signal processing, such as a Fourier transform, fast Fourier transform (FFT), Power Spectral Density (PSD) or any other suitable algorithm.
- FFT fast Fourier transform
- PSD Power Spectral Density
- the accumulator may then be diagnosed based on deviations from expected harmonics, e.g. in terms of amplitude.
- a single pressure sensor may be utilised to diagnose more than one accumulator.
- a pressure sensor in the high pressure path downstream a hydraulic pump providing the hydraulic pressure and upstream the percussion device
- a pressure sensor in the low pressure path downstream the percussion device
- an accumulator may be utilised e.g. only in the supply (high pressure) path.
- Fig. 2 illustrates exemplary hydraulic circuitry of the drilling rig according to fig. 1 ;
- Embodiments of the present disclosure will be exemplified in the following in view of a particular kind of drill rig, where drilling is carried out through the use of a percussion device in the form of a top hammer.
- the drill rig may also be of any other kind where drilling is carried out through the use of a hydraulic percussion device for transmitting stress waves into a drill tool for breaking rock.
- Drill rigs of the disclosed kind may comprise more than one control unit, e.g. a plurality of control units, where each control unit, respectively, may be arranged to be responsible for monitoring and carrying out various functions of the drill rig 100. For reasons of simplicity, however, it will be assumed in the following that the various functions are controlled by the control unit 120.
- the drill rig may then comprise means for transmitting pressure signals to the remote computer means. Alerts may also be generated in a remote control centre, e.g. in case the drill rig is remote controlled. Furthermore, when it is diagnosed that an accumulator is malfunctioning this may cause the drill rig control system to stop drilling, or at least reduce percussion power to reduce the risk that damages caused by the malfunctioning accumulator arises.
- a plurality of pressure measurements from pressure sensor 231 are retrieved, i.e., obtained.
- the plurality of pressure measurements are obtained over one or more time periods and at a frequency being at least twice a frequency of the reciprocating motion of the percussion piston and/or damping piston.
- the obtaining is performed with one or more high bandwidth pressure sensors distanced from the percussion piston and/or damping piston, so that the sensors are protected from vibrations and mechanical exposure caused by the reciprocating motion.
- the difference may be determined as a difference between an upper 401 and a lower 402 envelope of the pressure variations in the hydraulic circuit.
- the upper 401 and lower 402 envelopes may be determined in a straightforward manner according to well-known signal processing, and may be determined continuously or during a predetermined period of time, to determine a representative representation of the differences between minimum and maximum values in the hydraulic circuit.
- maximum and minimum values of the difference between the envelopes may be determined, e.g. during a period of time, where one, or both, of these values may be utilised as representation of the pressure variations in the hydraulic circuit.
- Fig. 5 illustrates an exemplary development of the pressure variations, and corresponding envelopes 501 , 502 in the hydraulic circuit when a fault occurs.
- the accumulator 112 From time to up to time t d amage the accumulator 112 is working properly. At time t d amage a fault occurs. For example, a leakage in the diaphragm 209 may occur, with the result that the accumulator gas may enter the hydraulic fluid.
- the accumulator 112 may otherwise suffer a pressure reduction.
- the accumulator 112 may also be subject to other faults that prevents proper accumulator operation. As a result of the faulty accumulator operation, pressure variations are no longer supressed to the desired extent, but the pressure variations start to increase as gas pressure of the accumulator decrease.
- the determination performed in step 304 it may be determined whether the determined representation of pressure variations in the hydraulic circuit exceeds a value of the reference representation of the pressure variations by a predetermined extent. According to the present example, it can be determined whether the difference between the upper and lower envelope exceeds a predetermined difference by a predetermined extent, i.e. , exceeding an acceptable variation range. According to embodiments of the disclosure, it can further be determined if a minimum value of the determined representation of pressure variations in the hydraulic circuit, such as the minimum difference between upper and lower envelope in fig. 5, e.g.
- the variations of pressure or flow may also be determined in any other suitable manner.
- the pressure or flow variations may be subjected to signal processing to determine the amplitude of one or more harmonics, where a change in the amplitude of the one or more harmonics may be utilised in diagnosing the accumulator state.
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Earth Drilling (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21727619.5A EP4162141A1 (en) | 2020-06-08 | 2021-05-12 | Method and system for diagnosing an accumulator in a hydraulic circuit |
KR1020227038370A KR20230020390A (en) | 2020-06-08 | 2021-05-12 | Method and system for diagnosing accumulators in hydraulic circuits |
AU2021289190A AU2021289190A1 (en) | 2020-06-08 | 2021-05-12 | Method and system for diagnosing an accumulator in a hydraulic circuit |
JP2022575488A JP2023529438A (en) | 2020-06-08 | 2021-05-12 | Accumulator diagnostic method and system in hydraulic circuit |
CA3180154A CA3180154A1 (en) | 2020-06-08 | 2021-05-12 | Method and system for diagnosing an accumulator in a hydraulic circuit |
CN202180039304.7A CN115698458A (en) | 2020-06-08 | 2021-05-12 | Method and system for diagnosing an accumulator in a hydraulic circuit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE2050667-1 | 2020-06-08 | ||
SE2050667A SE2050667A1 (en) | 2020-06-08 | 2020-06-08 | Method and System for Diagnosing an Accumulator in a Hydraulic Circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021251862A1 true WO2021251862A1 (en) | 2021-12-16 |
Family
ID=76076417
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2021/050455 WO2021251862A1 (en) | 2020-06-08 | 2021-05-12 | Method and system for diagnosing an accumulator in a hydraulic circuit |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP4162141A1 (en) |
JP (1) | JP2023529438A (en) |
KR (1) | KR20230020390A (en) |
CN (1) | CN115698458A (en) |
AU (1) | AU2021289190A1 (en) |
CA (1) | CA3180154A1 (en) |
SE (1) | SE2050667A1 (en) |
WO (1) | WO2021251862A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023177330A1 (en) * | 2022-03-15 | 2023-09-21 | Epiroc Rock Drills Aktiebolag | A damping arrangement and a hydraulic rock drilling machine |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4967553A (en) | 1988-06-28 | 1990-11-06 | Eimco-Secoma, Societe Anonyme | System for monitoring a hydraulic accumulator |
US20040244493A1 (en) * | 2001-10-18 | 2004-12-09 | Markku Keskiniva | Method and apparatus for monitoring operation of percussion device |
US20070007039A1 (en) * | 2002-11-05 | 2007-01-11 | Sandvik Tamrock Oy | Arrangement for controlling rock drilling |
WO2008127171A1 (en) * | 2007-04-11 | 2008-10-23 | Atlas Copco Rock Drills Ab | Method and device for controlling at least one drilling parameter for rock drilling |
US20140060932A1 (en) | 2012-08-31 | 2014-03-06 | Caterpillar Global Mining Llc | Media pressure cavitation protection system for rock drills |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE536711C2 (en) * | 2012-10-29 | 2014-06-10 | Atlas Copco Rock Drills Ab | Damping device for percussion, percussion, rock drill and method of damping at a rock drill |
DE102014108848A1 (en) * | 2014-06-25 | 2015-12-31 | Construction Tools Gmbh | Device for pressure monitoring |
GB2546790A (en) * | 2016-01-29 | 2017-08-02 | Ge Oil & Gas Uk Ltd | Hydraulic accumulator monitoring system |
-
2020
- 2020-06-08 SE SE2050667A patent/SE2050667A1/en not_active Application Discontinuation
-
2021
- 2021-05-12 CN CN202180039304.7A patent/CN115698458A/en active Pending
- 2021-05-12 KR KR1020227038370A patent/KR20230020390A/en active Search and Examination
- 2021-05-12 WO PCT/SE2021/050455 patent/WO2021251862A1/en unknown
- 2021-05-12 EP EP21727619.5A patent/EP4162141A1/en active Pending
- 2021-05-12 AU AU2021289190A patent/AU2021289190A1/en active Pending
- 2021-05-12 CA CA3180154A patent/CA3180154A1/en active Pending
- 2021-05-12 JP JP2022575488A patent/JP2023529438A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4967553A (en) | 1988-06-28 | 1990-11-06 | Eimco-Secoma, Societe Anonyme | System for monitoring a hydraulic accumulator |
US20040244493A1 (en) * | 2001-10-18 | 2004-12-09 | Markku Keskiniva | Method and apparatus for monitoring operation of percussion device |
US20070007039A1 (en) * | 2002-11-05 | 2007-01-11 | Sandvik Tamrock Oy | Arrangement for controlling rock drilling |
WO2008127171A1 (en) * | 2007-04-11 | 2008-10-23 | Atlas Copco Rock Drills Ab | Method and device for controlling at least one drilling parameter for rock drilling |
US20140060932A1 (en) | 2012-08-31 | 2014-03-06 | Caterpillar Global Mining Llc | Media pressure cavitation protection system for rock drills |
Also Published As
Publication number | Publication date |
---|---|
CA3180154A1 (en) | 2021-12-16 |
SE2050667A1 (en) | 2021-12-09 |
AU2021289190A1 (en) | 2022-10-13 |
JP2023529438A (en) | 2023-07-10 |
CN115698458A (en) | 2023-02-03 |
EP4162141A1 (en) | 2023-04-12 |
KR20230020390A (en) | 2023-02-10 |
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