EP3693534A1 - Détermination de la longueur d'un trou de forage perçu par une tige continue - Google Patents

Détermination de la longueur d'un trou de forage perçu par une tige continue Download PDF

Info

Publication number
EP3693534A1
EP3693534A1 EP19156375.8A EP19156375A EP3693534A1 EP 3693534 A1 EP3693534 A1 EP 3693534A1 EP 19156375 A EP19156375 A EP 19156375A EP 3693534 A1 EP3693534 A1 EP 3693534A1
Authority
EP
European Patent Office
Prior art keywords
drill rod
sensor
drill
arrangement
flushing medium
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.)
Withdrawn
Application number
EP19156375.8A
Other languages
German (de)
English (en)
Inventor
Samuli Verho
Annukka KOKKONEN
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.)
Sandvik Mining and Construction Oy
Original Assignee
Sandvik Mining and Construction Oy
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 Sandvik Mining and Construction Oy filed Critical Sandvik Mining and Construction Oy
Priority to EP19156375.8A priority Critical patent/EP3693534A1/fr
Priority to MX2020001633A priority patent/MX2020001633A/es
Publication of EP3693534A1 publication Critical patent/EP3693534A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/22—Handling reeled pipe or rod units, e.g. flexible drilling pipes

Definitions

  • the invention relates to an arrangement for determining position of a drill bit of a mine drilling machine.
  • the invention further relates to a mine drilling machine.
  • the invention still further relates to a method for drilling a hole into a rock.
  • the need for continuous drilling arises especially in the low profile (LP) and extra low profile (XLP) mines where rock support is a critical part of the process.
  • the height of the mine gallery may be as low as 1.2 meters. Due to the rock conditions it is necessary to install up to 2-6 meter long rock reinforcement bolts to the roof of the mine.
  • a document EP2896780 discloses a flexible drill rod for continuous drilling, in which adding of rods may be avoided.
  • position of drill bit both inside and outside of the hole.
  • the position should be known to measure length of drilled hole and to detect when bit has been retracted from the hole. Accurate length of the hole is critical for success of the bolting process, especially when using refabricated fixed length bolts. Also retraction of the drill bit needs to be ensured in the automated drilling cycle to prevent the drill rod breaking when positioning the arrangement. If the drill bit is not secured during movements of the arrangement it may hit the rock causing the major breakage of the drill rod or the drill bit itself.
  • an arrangement for determining position of a drill bit of a mine drilling machine the drill bit being arranged in a hollow, flexible and rotatable drill rod, the arrangement comprising a feed beam comprising a feed unit for feeding said drill rod in a drill hole, wherein the arrangement further comprises a first sensor arranged at the feed beam for monitoring position of the drill bit or the drill rod, and a second sensor arranged for measuring length of the hole.
  • a mine drilling machine comprising the drilling arrangement described above.
  • a method for drilling into a rock comprising using a drill bit arranged in a hollow, flexible and rotatable drill rod, rotating the drill rod and the drill bit therewith by a rotation unit, feeding the drill bit into the rock by said rotation unit, monitoring the drill bit or drill rod by a first sensor arranged at the feed beam, and measuring by a second sensor length of the hole.
  • the first sensor is arranged at the front of the feed beam.
  • the arrangement comprises a flushing medium hose connected to the drill rod, the flushing medium hose arranged for providing flushing medium in the drill rod, wherein the second sensor is arranged to measure length of the flushing medium hose passing the second sensor.
  • the arrangement comprises a flushing medium connector connecting the flushing medium hose to the drill rod, the connector enabling the flushing medium hose remaining unrotating while the drill rod is rotating, the second sensor thus arranged for measuring unrotating flushing medium hose.
  • the feed beam comprises a rod holder arranged at a front end of the feed beam for supporting the drill rod, and the first sensor being arranged in said rod holder.
  • a guiding element is arranged between the feed unit and the second sensor to bend the drill rod.
  • the guiding element comprises a guiding tube.
  • the arrangement comprises a control unit arranged to receive signals from the sensors, and to control the actuators moving the drill rod based on said signals.
  • control unit is arranged to change feed speed of the drill rod based on signals received from the second sensor.
  • control unit is arranged to slow down retracting feed speed of the drill rod when the second sensor is indicating the drill bit is about to leave the drill hole.
  • Figure 1 is a schematic side view of an arrangement for determining position of a drill bit of a mine drilling machine and method in partial cross-section.
  • the arrangement 100 is arranged in a mine M comprising floor F and roof R.
  • the drilling arrangement 100 is shown in drilling a hole on the roof R.
  • the arrangement 100 may also be used for drilling the floor or walls of the mine M.
  • the height d of the mine is very low, such that the mine M may be called as low profile or extra low profile mine. Therefore, a flexible drill rod 2 is used in the arrangement 100.
  • the flexible drill rod 2 is also hollow and rotatable drill, a rotation unit 1 being arranged for rotating said drill rod 2.
  • a drill bit In the front end of the drill rod 2 there is arranged a drill bit (not shown).
  • the arrangement 100 further comprises a feed beam 4 arranged to support a feed unit 1 that feeds and rotates the drill rod 2 in the hole being drilled.
  • the feed unit 1 comprises a rotation chuck (not shown) that may grip tightly to the drill rod 2 when the feed unit 1 starts rotating and pushing the drill rod 2 into the hole, such that the torque and the thrust are transmitted to the drill rod 2 and further to the drill bit.
  • a rotation chuck (not shown) that may grip tightly to the drill rod 2 when the feed unit 1 starts rotating and pushing the drill rod 2 into the hole, such that the torque and the thrust are transmitted to the drill rod 2 and further to the drill bit.
  • the feed beam 4 comprises a rod holder 11 arranged at a front end of the feed beam for supporting the drill rod 2.
  • a flushing medium hose 8 is connected to the drill rod 2 and arranged for providing flushing medium in the drill rod 2.
  • the flushing medium is liquid, such as water.
  • the flushing medium is gas or gas mixture, such as air.
  • the flushing medium is a mixture of liquid and gas, such as water and air.
  • the flushing medium hose 8 has a bendable structure.
  • a flushing medium connector 7 connects the flushing medium hose 8 to the drill rod 2.
  • the connector allows flushing medium to flow form the flushing medium hose 8 to the drill rod 2.
  • the flushing medium connector 7 enables the flushing medium hose 8 to remain unrotating while the drill rod 2 is rotating.
  • a guiding element 5, such as a guiding tube, is arranged to guide the drill rod 2.
  • the guiding element 5 may bend the drill rod 2. This facilitates that the drill rod 5 may be fed to the feed beam 4 in a direction that may be e.g. at least essentially parallel with the floor F or roof R of the mine, and then turned towards e.g. said floor F or roof R.
  • the guiding tube has a fixed shape, e.g. it is always changing the direction of the drill rod 2 in a same way.
  • the shape of the guiding tube may be changed or adjusted.
  • the guiding element 5 comprises a series of guiding loops or rings etc.
  • the feed beam 4 comprises a rod holder 11 arranged at a front end of the feed beam for supporting the drill rod 2.
  • the arrangement 100 comprises a sensor arrangement for monitoring position of the drill bit 3 both inside and outside of the hole.
  • the sensor arrangement comprises a first sensor 6 arranged at the feed beam 4 for monitoring position of the drill bit 3 or drill rod 2, and a second sensor 12 arranged for measuring length of the hole.
  • the first sensor 6 is arranged at the front of the feed beam 4. In the embodiment shown in Figure 1 , the first sensor 6 lies in the rod holder 11.
  • the first sensor 6 is able to detect when the drill rod 2 and the drill bit 3 are retracted away from the hole. In an embodiment, the first sensor 6 is arranged to give just information "yes” or “not” if the drill rod 2 and the drill bit 3 are retracted away from the hole or not.
  • the first sensor 6 may be e.g. an induction sensor, a mechanical sensor, a capacitive sensor, a magnetic sensor, an ultrasonic sensor, etc.
  • the first sensor 6 may comprise plurality of sensors. All said sensors may be of same type, or alternatively different types of sensors. An advantage is that reliability of the monitoring of the drill rod 2 or the drill bit 3 may be enhanced.
  • the second sensor 12 is arranged to measure length of the flushing medium hose 8. For this purpose, length value of the sensor is automatically reset to zero when starting the hole drilling. Then, the flushing medium hose 8 passing the second sensor 12 is measured, the length of which corresponds to the length of the hole and the position of the drill bit 3.
  • This embodiment is especially advantageous in combination with embodiments where the flushing medium connector 7 enables the flushing medium hose 8 to remain unrotating while the drill rod 2 is rotating. This combination may assure highly exact measuring of length of the hole.
  • the second sensor 12 comprises a measuring wheel that is connected to an encoder, a resolver, a potentiometer, etc.
  • a control unit 10 receives signals from the sensors 6, 12 and controls the actuators moving the drill rod 2 based on said signals.
  • the control unit 10 is arranged to change feed speed of the drill rod 2 based on signals received from the second sensor 12, for instance to slow down retracting feed speed of the drill rod 2 when the second sensor 12 is indicating the drill bit 3 is about to leave the drill hole.
  • FIG. 2 is a schematic view of a flexible drill rod.
  • the drill rod 2 may comprise a tube 19 and at least one corrugated cut 20 extending through the wall of the tube 19 in a transverse direction thereof, in other words in a direction transverse to the longitudinal axis D of the drill rod 2.
  • the corrugated cut 20 extends at each point substantially radially through the tube wall from the outside of the tube to the inside of the tube.
  • each corrugated cut 20 have a substantially spiral baseline 21 extending in a circulating manner around the tube 19 in the direction of longitudinal axis D from the direction of a first end of the drill rod to a direction of a second end of the drill rod.
  • Each corrugated cut 20 may be arranged to deviate from its baseline 21 on both sides of the baseline 21 forming a cut of a substantially corrugated shape.
  • the baseline 21 is not a physical part of the corrugated cut 20, but a virtual line on both sides of which the corrugated cut extends at each portion of the drill rod 2.
  • the corrugated cut 20 may comprise curved portions of one or several radiuses.
  • the corrugated cut 20 may also comprise straight portions connecting the curved portions.
  • the straight portions may be substantially parallel to the direction of the baseline 21, substantially perpendicular to the direction of the baseline 21 and/or arranged at an angle with respect to the baseline 21.
  • This corrugated cut 20 may then spiral along the tube 19.
  • the corrugated cut 20 may circulate around the drill rod 2, more particularly around the longitudinal axis D of the drill rod 2.
  • the shape of the corrugated cut 20 is of a teardrop-like shape.
  • the drill rod 2 may be made at the same time flexible, such that bending of the drill rod 2 is enabled in a transverse direction of the drill rod 2, and rigid, such that transmitting torque and thrust needed for drilling is enabled.
  • the bending radius of the tube 19 is less than 1 meter, ad preferably under 0.5 meter. This enables bending the drill rod 2 also at low drilling spaces and achieving an optimal amount of uninterrupted drilling at any circumstances using as much of the available drilling height as possible.
  • the corrugated cut 20 may be formed by laser cutting and/or high pressure water jet cutting.
  • the corrugated cut 20, even though very narrow, causes unconformity and discontinuity on the outer surface of the drill rod 2. As a consequence, it may occur that the drill rod 2 slightly sticks or freezes in the feed unit or in the guiding element(s). In other words, moving or sliding of the drill rod 2 through the feed unit or the guiding element(s) is not smooth, which has a negative effect to the drilling process. Additionally, the drill rod or the feed unit or the guiding element may be damaged or even broken due to said sticking or freezing.
  • the auxiliary feed unit 2 eliminates or at least decreases this problem by pushing the corrugated cut 20 as narrow as possible and thus levelling out the outer surface of the drill rod 2.
  • Figure 3 is a schematic side view of a mine drilling machine.
  • the mine drilling machine 22 comprises at least one drilling arrangement provided with the arrangement 100 for determining position of a drill bit.
  • the mine drilling machine 22 may comprise a boom 3 that is provided with the drilling arrangement. This particular type of a mine drilling machine 22 is especially suitable for tunnels and other drilling spaces of limited height, such as low profile mines.
  • the mine drilling machine 22 may comprise not only drilling arrangement(s), but also other type of mining equipment.
  • the arrangement 100 for determining position of a drill bit is provided with a control unit 10 as described earlier in this description.
  • the control unit 10 is arranged in the mine drilling machine 22.
  • the control unit may control not only the feed speed of the drill rod 2 as described above, but also movements of the boom 3 and the drilling arrangement, etc.
  • Figure 4 is a schematic side view of a detail of an arrangement.
  • the feed beam 4 comprises a rod holder 11 arranged at a front end of the feed beam for supporting the drill rod 2, and the first sensor 6 is arranged in said rod holder 11.
  • the rod holder 11 is provided with at least one contact bracket 13.
  • the contact bracket 13 makes contact with the rock K to be drilled.
  • the bracket(s) 13 keep(s) the rod holder 11 at a distance from the rock K. This makes it possible to arrange the first sensor 6 on a front surface of the rod holder 11. This provides an advantage that the first sensor is accessible for maintenance work etc.
  • Figure 5 illustrates a method for drilling a hole into a rock.
  • the method comprises using 501 a drill bit 3 arranged in a hollow, flexible and rotatable drill rod 2, rotating 502 the drill rod 2 and the drill bit 3 by a rotation unit 1, feeding 503 the drill rod into the rock by said rotation unit, monitoring 504 the drill bit 3 or drill rod 2 by a first sensor 6 arranged at the feed beam (4), and measuring by a second sensor 12 length of the hole.
  • the method comprises providing flushing medium in the drill rod 2 by a flushing medium hose 8 connected to the drill rod 2, measuring the length of the hole by monitoring the flushing medium hose 8 by the second sensor 12, and measuring length of the flushing medium hose 8 passing said second sensor 12.
  • it is slowed down retracting feed speed of the drill rod 2 when the second sensor 12 is indicating the drill bit 3 is about to leave the drill hole.
  • the hole is drilled in a continuous way.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Drilling And Boring (AREA)
EP19156375.8A 2019-02-11 2019-02-11 Détermination de la longueur d'un trou de forage perçu par une tige continue Withdrawn EP3693534A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19156375.8A EP3693534A1 (fr) 2019-02-11 2019-02-11 Détermination de la longueur d'un trou de forage perçu par une tige continue
MX2020001633A MX2020001633A (es) 2019-02-11 2020-02-10 Arreglo, maquina de perforacion y metodo.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19156375.8A EP3693534A1 (fr) 2019-02-11 2019-02-11 Détermination de la longueur d'un trou de forage perçu par une tige continue

Publications (1)

Publication Number Publication Date
EP3693534A1 true EP3693534A1 (fr) 2020-08-12

Family

ID=65408934

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19156375.8A Withdrawn EP3693534A1 (fr) 2019-02-11 2019-02-11 Détermination de la longueur d'un trou de forage perçu par une tige continue

Country Status (2)

Country Link
EP (1) EP3693534A1 (fr)
MX (1) MX2020001633A (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3563436A (en) * 1967-09-28 1971-02-16 Inst Francais Du Petrole Endless conveyor for feeding a flexible elongated member
US3658138A (en) * 1969-04-30 1972-04-25 Inst Francais Du Petrole Process for optimizing the penetration speed of a drilling tool driven by a motor whose torque decreases with an increasing running speed and apparatus therefor
US3837592A (en) * 1971-12-24 1974-09-24 Inst Francais Du Petrole Device for automatically positioning the windings formed by a flexible elongated member stored in an annular basket rotatable about a vertical axis
US3872932A (en) * 1973-10-23 1975-03-25 Inst Francais Du Petrole Process and apparatus for automatic drilling
US20020170711A1 (en) * 2001-04-23 2002-11-21 David Nuth Apparatus and methods for conveying instrumentation within a borehole using continuous sucker rod
WO2007026111A1 (fr) * 2005-08-27 2007-03-08 Psl Energy Services Limited Procede et appareil de mesure de vitesse de tubulaires
US20140262340A1 (en) * 2013-03-14 2014-09-18 Richard Beddoes Methods and systems for drilling from underground access tunnels to develop subterranean hydrocarbon reservoirs
EP2896780A1 (fr) 2014-01-17 2015-07-22 Sandvik Mining and Construction Lyon SAS Tige de forage flexible

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3563436A (en) * 1967-09-28 1971-02-16 Inst Francais Du Petrole Endless conveyor for feeding a flexible elongated member
US3658138A (en) * 1969-04-30 1972-04-25 Inst Francais Du Petrole Process for optimizing the penetration speed of a drilling tool driven by a motor whose torque decreases with an increasing running speed and apparatus therefor
US3837592A (en) * 1971-12-24 1974-09-24 Inst Francais Du Petrole Device for automatically positioning the windings formed by a flexible elongated member stored in an annular basket rotatable about a vertical axis
US3872932A (en) * 1973-10-23 1975-03-25 Inst Francais Du Petrole Process and apparatus for automatic drilling
US20020170711A1 (en) * 2001-04-23 2002-11-21 David Nuth Apparatus and methods for conveying instrumentation within a borehole using continuous sucker rod
WO2007026111A1 (fr) * 2005-08-27 2007-03-08 Psl Energy Services Limited Procede et appareil de mesure de vitesse de tubulaires
US20140262340A1 (en) * 2013-03-14 2014-09-18 Richard Beddoes Methods and systems for drilling from underground access tunnels to develop subterranean hydrocarbon reservoirs
EP2896780A1 (fr) 2014-01-17 2015-07-22 Sandvik Mining and Construction Lyon SAS Tige de forage flexible

Also Published As

Publication number Publication date
MX2020001633A (es) 2020-10-01

Similar Documents

Publication Publication Date Title
CA2214741C (fr) Tracteur pour controler a distance les deplacements et la pressurisation d'une perforatrice de roches
RU2490417C1 (ru) Удерживающее устройство, вставляемое в центральный канал трубного компонента бурильной колонны, и соответствующий трубный компонент бурильной колонны
CA2936262C (fr) Tube de guidage pour tige de forage pliable
US11118402B2 (en) Rock drilling machine, rock drilling rig and measuring method
JP5189866B2 (ja) シールド掘進機の掘削断面土層判定装置および判定方法
FI79884B (fi) Foerfarande och anordning foer borrning av ett haol i berg.
EP3693534A1 (fr) Détermination de la longueur d'un trou de forage perçu par une tige continue
US10947835B2 (en) Borehole mapping tool and methods of mapping boreholes
US8096370B2 (en) Apparatus and method for producing soil elements underground
US7287337B2 (en) Pitch sensing in drilling machines
KR101874148B1 (ko) 추력 계측 시스템
EP3693535B1 (fr) Agencement de forage, machine et procédé de forage
EP0562147A1 (fr) Système de forage dirigé comportant un moteur monté d'une façon excentrique et un capteur biaxial
CN114382406A (zh) 定向冲击岩孔施工设备
GB2113275A (en) Measuring downhole drilling forces
US4475605A (en) Turbodrill
JP2000257374A (ja) 既設埋設管路更新用掘進機、既設埋設管路更新用掘進機に用いるフライスカッタ盤、ならびに既設埋設管路更新時における掘進方法
CN113482533B (zh) 超短半径水平井万向打孔筛管完井系统及完井方法
CN216950348U (zh) 一种用于竖井掘进机的导向系统
JP2005213743A (ja) 管挿入制御装置及び管挿入制御方法
CN113107456A (zh) 一种煤矿井下复合钻进控制钻孔倾角方法及装置
AU2021212011A1 (en) Survey system for blast hole drilling rigs
WO2021031560A1 (fr) Système et procédé de mesure multi-paramètres au voisinage du trépan basés sur un réseau de fibres optiques
JP2020016647A (ja) ボーリング孔軌跡計測装置及びその方法
JP2013011074A (ja) 方向制御削孔方法、方向制御削孔システム及び削孔システム

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17P Request for examination filed

Effective date: 20210212

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

17Q First examination report despatched

Effective date: 20210310

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20210622