WO2009139743A1 - Agencement dans une installation de forage et procédé de surveillance d'un flux d'air - Google Patents

Agencement dans une installation de forage et procédé de surveillance d'un flux d'air Download PDF

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Publication number
WO2009139743A1
WO2009139743A1 PCT/US2008/006075 US2008006075W WO2009139743A1 WO 2009139743 A1 WO2009139743 A1 WO 2009139743A1 US 2008006075 W US2008006075 W US 2008006075W WO 2009139743 A1 WO2009139743 A1 WO 2009139743A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
inlet valve
arrangement
flow
inlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2008/006075
Other languages
English (en)
Inventor
Per Krainer
Deyi Jiao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Epiroc Rock Drills AB
Epiroc Drilling Solutions LLC
Original Assignee
Atlas Copco Rock Drills AB
Atlas Copco Drilling Solutions LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Atlas Copco Rock Drills AB, Atlas Copco Drilling Solutions LLC filed Critical Atlas Copco Rock Drills AB
Priority to PCT/US2008/006075 priority Critical patent/WO2009139743A1/fr
Priority to US12/736,738 priority patent/US8813870B2/en
Priority to PCT/US2009/002668 priority patent/WO2009139825A2/fr
Priority to CN200980117148.0A priority patent/CN102027188B/zh
Priority to EP09746914.2A priority patent/EP2310620B1/fr
Publication of WO2009139743A1 publication Critical patent/WO2009139743A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/10—Valve arrangements in drilling-fluid circulation systems
    • E21B21/106—Valve arrangements outside the borehole, e.g. kelly valves
    • 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
    • E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/18—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/20—Flow

Definitions

  • the present invention relates to an arrangement in a drill rig in accordance with the preamble of the independent claim.
  • the invention also relates to a method for detecting a reduced air flow through a flushing hole in a drill bit.
  • Drill rigs in different sizes are frequently used in constructional work to drill holes in rocks.
  • the drill rig comprises a drill bit adapted for the specific conditions of the rock and used to penetrate the rock, and chip away the fractured rocks.
  • the penetration force is generated by either a high level feed force or percussive wave forms.
  • the rotation torque generated by a rotation motor will shear off the fractured rock.
  • the monitoring device gives rise to a pressure drop in the air flow path which will have a negative impact on the air flow out through the flushing holes in the drill bit.
  • the claimed arrangement comprises an inlet valve placed before the inlet to a displacement compressor that is used for supplying a flow of air via a pressure vessel to at least one flushing hole in the surface of a drill bit, said arrangement is used for indirectly detecting a reduced flow of air through the at least one flushing hole in the surface of the drilling bit.
  • the arrangement further comprises means for detecting the quantity of air flowing through the inlet valve placed before the inlet of the displacement compressor.
  • the claimed arrangement makes it possible to move the measuring point for monitoring the flow of air through the flushing holes in the drill bit from down stream of the compressor to up stream of the compressor.
  • This arrangement has several advantages since the required means for detection of the flow up stream of the compressor is less complex and expensive. Secondly the negative pressure drop in the flow path is eliminated, and furthermore the results from the conducted measurements up stream of the compressor are more reliable.
  • the detection of the quantity of air flowing through the inlet valve is indirectly detected by measuring the pressure in the flow path for air to the inlet valve placed before the inlet of the compressor.
  • a pressure sensor is used for measuring the pressure in the flow path to the inlet valve and thereby indirectly monitoring the flow of air through the flushing holes.
  • Pressure sensors provide reliable measuring results, and are components that are readily available and easy to install.
  • the detection of the quantity of air flowing through the inlet valve is indirectly detected by measuring the size of the flow area in the inlet valve.
  • the inlet valve is controlled by means that is measuring the pressure in the flow path from the compressor and, in case of a blocked flushing hole in the drill bit, close to the inlet valve to avoid that the system pressure in the flow path from the compressor to the drill bit increase further. Since the flow area is adjusted depending on the system pressure in the flow path, measurement of the flow area in the inlet valve, which is easy to detect, will indirectly provide information about the pressure in the flow path from the compressor and the air flow trough the flushing holes in the drill bit.
  • the present invention also relates to a method for detecting a reduced air flow through a flushing hole in a front surface of a drilling bit in an arrangement according to anyone of claims 1 to 4, comprising the steps:
  • the claimed method provides a reliable method for monitoring the flow of air through the flushing hole in the drill bit without the use of complex and expensive measuring equipment. Furthermore, the monitoring is done by detecting the flow of air upstream of the compressor which is considerably easier than in previous arrangements and methods.
  • Figure 1 illustrates a drill rig in which the claimed arrangement is used;
  • Figure 2 illustrates a perspective view of a drill bit, and
  • Figure 3 discloses the claimed arrangement schematically.
  • a drill bit 20, illustrated in figure 2 is used for penetrating the rock and chip away the fractured rocks.
  • the front surface 21 of the drill bit 20 is provided with a number of drill elements 22 that are used for penetrating the rock.
  • the front surface is furthermore provided with four flushing holes 23. Compressed air, provided from a displacement compressor placed in the rig body 11, is flowing out from the flushing holes 23 in order to blow the rock cuttings away and clean the surface of the rock to ensure that the drill bit 20 always is in contact with fresh and solid rock surface in order to keep the drilled hole free from already cut rock.
  • FIG. 3 discloses the claimed arrangement schematically.
  • the arrangement comprises an air inlet flow path 30 through which air to a compressor 32, powered by a power source M, is lead via an inlet valve 31.
  • the compressed air from the compressor 32 is passed on to a pressure vessel 33.
  • Air is fed from the pressure vessel 33 via an air flow path 34 to the drill bit 20 where it exits the bit via the flushing holes 23.
  • the arrangement furthermore comprises means 35 for detecting the air flow in the inlet flow path 30.
  • the air flow through the flushing holes 23 in the drill bit 20 is monitored by detecting the air flow through the inlet flow path 30 indirectly by measuring the pressure in the inlet flow path 30. If the flushing holes 23 in the drill bit 20 for some reason are plugged, the system pressure in the flow path 34 to the drill bit 20 will rise due to the plugged outlets. The plugged outlets furthermore results in an increased pressure in the flow path 30 to the inlet valve 31 and the compressor 32 that is detected by a pressure sensor, not illustrated, that is measuring the pressure in the flow path 30. In another embodiment of the present invention the air flow through the flushing holes 23 in the drill bit 20 is monitored by measuring the flow area within the inlet valve 32.
  • the inlet valve 32 is used for regulating the quantity of air that is supplied to the compressor 33 in order to avoid that system pressure from rising if the air flow through the flushing holes 23 in the drill bit 20 is plugged.
  • the system pressure in the flow path 34 is measured and the measured value used for the control of the inlet valve 31.
  • the air flow through the flushing holes 23 in the drill bit 20 could therefore be monitored by measuring the area or the position of the inlet valve 31 which is considerably easier and causes no pressure drop in the flow path 34 to the drill bit 20.
  • Both embodiments of the present invention described above also provides a more reliably monitoring of the air flow since the determination of the air flow in the flow path 30 is either based on an increased pressure or a reduced flow area which is easy to measure compared to the existing solutions.

Landscapes

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

Abstract

La présente invention concerne un agencement dans une installation de forage. L'agencement comporte une vanne d'entrée placée avant l'entrée vers un compresseur volumétrique qui est utilisé pour alimenter un flux d'air via une cuve sous pression vers au moins un trou d'injection à la surface d'un trépan. L'agencement est utilisé pour détecter un flux réduit d'air à travers ledit au moins un trou d'injection à la surface du trépan. L'agencement comporte en outre un moyen permettant de détecter la quantité d'air s'écoulant à travers la vanne d'entrée placée avant l'entrée vers le compresseur volumétrique. L'invention concerne en outre un procédé permettant de surveiller indirectement un flux réduit d'air à travers au moins un trou d'injection dans l'agencement précédent.
PCT/US2008/006075 2008-05-13 2008-05-13 Agencement dans une installation de forage et procédé de surveillance d'un flux d'air Ceased WO2009139743A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PCT/US2008/006075 WO2009139743A1 (fr) 2008-05-13 2008-05-13 Agencement dans une installation de forage et procédé de surveillance d'un flux d'air
US12/736,738 US8813870B2 (en) 2008-05-13 2009-04-29 Arrangement and a method for monitoring an air flow in a drill rig
PCT/US2009/002668 WO2009139825A2 (fr) 2008-05-13 2009-04-29 Agencement et procédé pour contrôler un écoulement d'air dans un appareil de forage
CN200980117148.0A CN102027188B (zh) 2008-05-13 2009-04-29 用于监测钻机中的空气流动的装置以及方法
EP09746914.2A EP2310620B1 (fr) 2008-05-13 2009-04-29 Agencement et procede pour controler un ecoulement d'air dans un appareil de forage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2008/006075 WO2009139743A1 (fr) 2008-05-13 2008-05-13 Agencement dans une installation de forage et procédé de surveillance d'un flux d'air

Publications (1)

Publication Number Publication Date
WO2009139743A1 true WO2009139743A1 (fr) 2009-11-19

Family

ID=41318942

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/006075 Ceased WO2009139743A1 (fr) 2008-05-13 2008-05-13 Agencement dans une installation de forage et procédé de surveillance d'un flux d'air

Country Status (1)

Country Link
WO (1) WO2009139743A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012026874A1 (fr) * 2010-08-26 2012-03-01 Atlas Copco Rock Drills Ab Procédé et système pour déterminer une variation de débit de fluide de nettoyage et appareil à forer la roche
US9347285B2 (en) 2010-08-26 2016-05-24 Atlas Copco Rock Drills Ab Method and system for controlling a compressor at a rock drilling apparatus and a rock drilling apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5235324A (en) * 1990-07-23 1993-08-10 Asulab S.A. Detector for over-pressure inside a pipe and a pump fitted with such a detector
US20040173379A1 (en) * 2003-03-04 2004-09-09 Sandvik Ab Hydraulically-operated control system for a screw compressor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5235324A (en) * 1990-07-23 1993-08-10 Asulab S.A. Detector for over-pressure inside a pipe and a pump fitted with such a detector
US20040173379A1 (en) * 2003-03-04 2004-09-09 Sandvik Ab Hydraulically-operated control system for a screw compressor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012026874A1 (fr) * 2010-08-26 2012-03-01 Atlas Copco Rock Drills Ab Procédé et système pour déterminer une variation de débit de fluide de nettoyage et appareil à forer la roche
CN103069100A (zh) * 2010-08-26 2013-04-24 阿特拉斯·科普柯凿岩设备有限公司 用于确定冲洗介质流的变化的方法和系统以及钻岩设备
AU2011293947B2 (en) * 2010-08-26 2015-01-29 Epiroc Rock Drills Aktiebolag Method and system for determining a variation in a flushing medium flow and rock drilling apparatus
CN103069100B (zh) * 2010-08-26 2015-06-17 阿特拉斯·科普柯凿岩设备有限公司 用于确定冲洗介质流的变化的方法和系统以及钻岩设备
US9347285B2 (en) 2010-08-26 2016-05-24 Atlas Copco Rock Drills Ab Method and system for controlling a compressor at a rock drilling apparatus and a rock drilling apparatus
US9416605B2 (en) 2010-08-26 2016-08-16 Atlas Copco Rock Drills Ab Method and system for determining a variation in a flushing medium flow and rock drilling apparatus

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