EP3854985A1 - Tige de forage flexible à section longitudinale et procédé - Google Patents

Tige de forage flexible à section longitudinale et procédé Download PDF

Info

Publication number
EP3854985A1
EP3854985A1 EP20153219.9A EP20153219A EP3854985A1 EP 3854985 A1 EP3854985 A1 EP 3854985A1 EP 20153219 A EP20153219 A EP 20153219A EP 3854985 A1 EP3854985 A1 EP 3854985A1
Authority
EP
European Patent Office
Prior art keywords
connector
section
lengthwise
drill rod
lengthwise section
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.)
Granted
Application number
EP20153219.9A
Other languages
German (de)
English (en)
Other versions
EP3854985B1 (fr
Inventor
Samuli Verho
Annukka KOKKONEN
Laurent Demia
Guillaume NADDAF
Calixte BLANC-BERNARD
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
Sandvik Mining and Construction Lyon SAS
Original Assignee
Sandvik Mining and Construction Oy
Sandvik Mining and Construction Lyon SAS
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, Sandvik Mining and Construction Lyon SAS filed Critical Sandvik Mining and Construction Oy
Priority to FIEP20153219.9T priority Critical patent/FI3854985T3/fi
Priority to PL20153219.9T priority patent/PL3854985T3/pl
Priority to EP20153219.9A priority patent/EP3854985B1/fr
Priority to MX2021000870A priority patent/MX2021000870A/es
Publication of EP3854985A1 publication Critical patent/EP3854985A1/fr
Application granted granted Critical
Publication of EP3854985B1 publication Critical patent/EP3854985B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E21B7/025—Rock drills, i.e. jumbo drills
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/20—Flexible or articulated drilling pipes, e.g. flexible or articulated rods, pipes or cables
    • 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/003—Machines for drilling anchor holes and setting anchor bolts
    • E21D20/006—Machines for drilling anchor holes and setting anchor bolts having magazines for storing and feeding anchoring-bolts

Definitions

  • the invention relates to a lengthwise section of a flexible drill rod.
  • the invention further relates to a flexible drill rod.
  • the invention still further relates to a method for managing a drilling or a maintenance of a flexible drill rod.
  • 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.
  • a problem with the flexible drill rod is that it is a quite expensive part, and thus its replacement causes high costs.
  • a lengthwise section of a flexible drill rod comprising
  • the front sections or those parts close to a drill bit of the flexible drilling rod are worn much quicker than back sections far from the drill bit.
  • the lengthwise section makes it possible to change only those sections of the flexible drill rod that are worn or break, without need for replacing the whole length of the flexible drill rod. Thereby great savings in using flexible drilling rods may be achieved.
  • the length of the drilling rod may be tuned according to the wanted drilled hole length by adjusting the number of sections, i.e. by adding or removing the sections, in the drilling rod.
  • a flexible drill rod comprising at least two lengthwise sections as claimed in any of the preceding claims, wherein the first connector of a first of said at least two lengthwise sections is attached to the second connector of a second of said at least two lengthwise sections.
  • a method for managing a drilling or a maintenance of a flexible drill rod comprising
  • the outer tube comprises at least one corrugated cut extending through a wall of the outer tube in a transverse direction, wherein said at least one corrugated cut has a substantially spiral baseline extending in a circulating manner around the outer tube in the lengthwise direction of the section.
  • the at least one first connector element is detachable connectable to said at least one second connector element of said another section.
  • the connectors comprise at least one locking system for preventing unintentional decoupling of the connectors.
  • the locking system is incorporated in at least one of the connectors.
  • the locking system comprises at least one standalone locking component.
  • the at least one first connector element and said at least one second connector element establishing the tube connection are identical.
  • the connector elements comprise lengthwise directed extensions and gaps therebetween arranged around the connector, the gap dimensioned for receiving the extension.
  • the pipe connector elements comprise a sealing arrangement adapted to seal the internal pipe connection.
  • the flexible drill rod comprises a drill bit, the drill bit having a drill bit connector adapted to be detachable attachable to one of the connectors of the lengthwise section for transmitting torque for rotation from the lengthwise section to the drill bit, and for allowing flushing medium flow in the internal pipe from the lengthwise section to the drill bit.
  • the flexible drill rod comprises a drill bit, the drill bit having a drill bit connector, and an adapter element comprising a third connector adapted to be detachable attachable to the drill bit, and a fourth connector adapted to be detachable attachable to one of the connectors of the lengthwise section, the adapter element being adapted for transmitting torque for rotation from the lengthwise section to the drill bit, and for allowing flushing medium flow in the internal pipe from the lengthwise section to the drill bit.
  • the adapter may allow a drill bit without first or second connector to be attached to the lengthwise section.
  • the method comprises decoupling the first lengthwise section behind a drill bit and adding the substitutive lengthwise section to the opposite end of the drill rod.
  • the method comprises adding the decoupled first lengthwise section as the substitutive lengthwise section to the opposite end of the drill rod.
  • Figure 1a is a schematic view of two lengthwise sections of a flexible drill rod
  • Figure 1b is a schematic side view of the lengthwise sections shown in Figure 1a in partial cross-section.
  • the lengthwise section 1 comprises an outer tube 2 and an internal pipe 4 inside the outer tube 2. At least part of the outer tube 2 is flexible to enable bending in a transverse direction of the section 1.
  • the section 1 is sensibly rigid in rotation to enable transmitting torque and thrust needed for drilling, or pulling force for removing the drilling rod, the torque and thrust at least mainly transmitted by the outer tube 2.
  • the internal pipe 4 is adapted for managing flushing medium flow through the section 1 pumped from the machine to a drill bit.
  • 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 is a mixture of air and cuttings acting by air sucked from the drill bit to the machine for removing the cuttings from the drill bit.
  • the internal pipe 4 has an ability to bend with the outer pipe 2.
  • the length of the section 1 may be selected e.g. in range of 0,5 meter to 1,5 meters, or even more.
  • the section 1 comprises a first connector 5 arranged at a first end 7 of the outer tube 2 and the internal pipe 4.
  • the first connector comprises at least one first connector element 9 and at least one first pipe connector element 17.
  • the section 1 comprises a second connector 6 arranged at a second end 8 that is opposite to the first end of the outer tube 2 and the internal pipe 4.
  • the second connector 6 comprises at least one second connector element 10 and at least one second pipe connector element 18.
  • first and second connectors 5, 6 are manufactured separately and welded to the section.
  • the connectors may be attached to the section by fixing means, such as screws.
  • the outer diameter of the outer tube 2 and the connectors 5, 6 is preferably below 30mm.
  • the first connector 5 is arranged to establish a male connector and the second connector 6 is arranged to establish a female connector.
  • the first connector 5 and the second connector 6 are designed so that a first connector 5 of a first lengthwise section 1 can be attached to a second connector 6 of a second lengthwise section 1.
  • flexible drill rods 100 which are essentially longer than a single lengthwise section 1.
  • the connector elements 5, 6 establishes a tube connection 11 for transmitting torque and rotational movement over the connection from one lengthwise section to another one.
  • the connector elements also transmit longitudinal movements.
  • the connector elements 9, 10 comprise lengthwise directed extensions 14 and gaps or bays 15 therebetween arranged around the connector 5, 6.
  • the extensions 14 and gaps 15 arranged in the first connector 5 are dimensioned so that they may receive gaps and extensions of the second connector, respectively. According to an idea, the connection looks like a flute assembly.
  • the pipe connector elements 17, 18 comprises internal channels that establish a pipe connection 12 allowing flushing medium flow in the internal pipe 4 from one lengthwise section to another one.
  • the connectors 5, 6 comprise at least one locking system 13 for preventing unintentional decoupling of the connectors 5, 6.
  • the locking system 13 comprises in the second connector element 10 a knob 21 that is arranged at an end of a flexible arm 22.
  • the locking system 13 locks the connector elements 9, 10 together by forcing the knob 21 in the pit 23. It is to be noted that the design and number of the locking systems 13 may vary. For instance, two locking systems 13 can be arranged on opposite sides of the circumference of the connectors.
  • the first connector element 9 may be detached from the second connector element 10 without breaking the lengthwise sections 1 or the connector elements.
  • the knob 21 may be removed from the corresponding pit 23 by bending the flexible arm 22 outwards.
  • the locking system can be un-lock with a screw driver or a specific tool. In another embodiment, the locking system can be un-lock manually.
  • the pipe connector elements 17, 18 comprises a sealing arrangement 19 that is adapted to seal the pipe connection 12 in order to prevent flushing medium to leak out from the internal pipe 4.
  • the sealing arrangement may comprise e.g. at least one O-ring (as shown in figure 1b ) or some another sealing element.
  • the sealing arrangement automatically seal the pipe connection 12 as the connectors 5, 6 are attached to each other.
  • the flexibility of the outer tube 2 is created by at least one cut 3, such as a corrugated cut, that extends through a wall of the outer tube 2 in a transverse direction thereof.
  • the corrugated cut 3 may have a substantially spiral baseline extending in a circulating manner around the outer tube 2 in the lengthwise direction of the section 1.
  • the corrugated cut 3 is arranged to deviate from its baseline on both sides of the baseline forming a cut of a substantially corrugated shape spiraling along the outer tube 2.
  • the pipe connector elements 17, 18 are fixed to and rotated with the first and second connector elements 9, 10 and the outer pipe 2. Also the internal pipe 4 is rotating with the connector elements 9, 10 and the outer pipe 2. In another embodiment, the pipe connector elements 17, 18 are not fixed to the second connector elements 9, 10 and the outer pipe 2. Then, at least in principle, the pipe connector elements 17, 18 and the internal pipe 4 is able to rotate in relation to the outer tube 2. However, there are no apparatus forcing the internal pipe to rotate.
  • a flexible drill rod 100 may be construed by connecting required number (at least two) of lengthwise sections 1 in succession and arranging a drill bit therein. Thus, the length of the drill rod 100 may be adjusted by selecting the number of the lengthwise sections 1 arranged in the drill rod 100.
  • Figure 2a is a schematic view of a section of another flexible drill rod
  • Figure 2b is a schematic view of the flexible drill rod shown in Figure 2a
  • Figure 2c is a schematic side view of the flexible drill rod shown in Figure 2a in partial cross-section
  • Figure 2d is a schematic side view of a detail of the flexible drill rod shown in Figure 2a in partial cross-section.
  • the connector elements 9, 10 that transfers the torque, i.e. establishes the tube connection 11, are at least largely identical.
  • the locking system 13 comprises at least one standalone locking component 20.
  • the standalone locking component 20 has a C-shape of section of a circle.
  • the locking component 20 is flexible so that it can be expanded and arranged around the first and the second connector 5, 6.
  • Said first and second connectors 5, 6 have sections of grooves 24 on their outer perimeter.
  • the sections of grooves 24 create a circumferential groove around the tube connection when the connectors 5, 6 are connected to each other.
  • the lengthwise sections 1 can be detached after the locking component 20 is removed from the groove, e.g. manually or with a tool.
  • the flexible drill rod 100 comprises a drill bit 16.
  • the drill bit 16 has a drill bit connector 25 adapted to be detachable attachable directly to a lengthwise section 1.
  • the drill bit connector 25 transmits torque from the lengthwise section 1 to the drill bit 16.
  • the drill bit connector 25 further comprises a pipe connection that allows flushing medium flow in the internal pipe 4 from the lengthwise section to the drill bit 16.
  • an adapter element 30 that is arrangeable between a lengthwise section 1 and the drill bit 16.
  • the adapter element comprises a third connector 31 for detachable attachment to the drill bit 16, and a fourth connector 32 adapted to be detachable attachable to one of the connectors 5, 6 of the lengthwise section 1.
  • the adapter element transmits torque from the lengthwise section to the drill bit and leads flushing medium flow from the internal pipe 4 to the drill bit 16 or vice versa.
  • Figure 2d is showing the connection between two lengthwise sections in a more detailed way.
  • An arrow is showing flow of flushing medium through the lengthwise sections 1 and the pipe connection 12.
  • the pipe connection is sealed with a seal 29 that is an O-ring. It is to be noted that the sealing arrangement 19 may be realized many alternative ways.
  • the connector In the end opposite to the drill bit end, there is a connector (not shown) that connects the internal pipe 4 to a supply hose (not shown) for supplying flushing medium fluid in the internal pipe 4.
  • the connector comprises a turning joint that allows the supply hose being unrotating while the internal pipe 4 is rotating.
  • Figure 3 is a schematic side view of a mine drilling machine.
  • the mine drilling machine 26 has at least one drilling arrangement 28 that comprises a flexible drill rod 100 discussed in this description.
  • the mine drilling machine 26 may comprise a boom 27 that is provided with the drilling arrangement 28. This particular type of a mine drilling machine 26 is especially suitable for tunnels and other drilling spaces of limited height, such as low profile mines.
  • the mine drilling machine 26 may comprise not only drilling arrangement(s) 28 with the flexible drill rod 100, but also other type of mining equipment.
  • Figure 4 illustrates a method for managing a drilling or a maintenance of a flexible drill rod.
  • connection (s) 11, 12 of the lengthwise section to be decoupled it is decoupled a worn-out or damaged lengthwise section 1 from the drill rod 100 by opening 401 connection (s) 11, 12 of the lengthwise section to be decoupled. Then, one or more substitutive lengthwise section(s) is/are added 402 in the drill rod 100.
  • the connector (s) 5, 6 of the substitutive lengthwise section(s) are connected 403 to connector (s) 5, 6 of the lengthwise section(s) in the drill rod (100).
  • the decoupled first lengthwise section 1 is used as the substitutive lengthwise section 1 that is added to the opposite end of the drill rod 100.
  • the decoupled first lengthwise section 1 is not attached back to the drill rod 100, but the sent e.g. to be repaired.
  • the length of the drill rod 100 is adjusted by adding or removing lengthwise sections 1 in the drill rod 100.
  • the invention is not limited solely to the embodiments described above, but instead many variations are possible within the scope of the inventive concept defined by the claims below.
  • the variation may deal with the connector shape, the locking system or also the internal pipe connection, for instance.
  • the attributes of different embodiments and applications can be used in conjunction with or replace the attributes of another embodiment or application.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP20153219.9A 2020-01-22 2020-01-22 Tige de forage flexible à section longitudinale et procédé Active EP3854985B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FIEP20153219.9T FI3854985T3 (fi) 2020-01-22 2020-01-22 Pituussuuntainen osa, joustava poratanko ja menetelmä
PL20153219.9T PL3854985T3 (pl) 2020-01-22 2020-01-22 Sekcja wzdłużna, elastyczna żerdź wiertnicza oraz sposób
EP20153219.9A EP3854985B1 (fr) 2020-01-22 2020-01-22 Tige de forage flexible à section longitudinale et procédé
MX2021000870A MX2021000870A (es) 2020-01-22 2021-01-21 Seccion longitudinal de una varilla de sondeo flexible y metodo.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20153219.9A EP3854985B1 (fr) 2020-01-22 2020-01-22 Tige de forage flexible à section longitudinale et procédé

Publications (2)

Publication Number Publication Date
EP3854985A1 true EP3854985A1 (fr) 2021-07-28
EP3854985B1 EP3854985B1 (fr) 2023-03-08

Family

ID=69187719

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20153219.9A Active EP3854985B1 (fr) 2020-01-22 2020-01-22 Tige de forage flexible à section longitudinale et procédé

Country Status (4)

Country Link
EP (1) EP3854985B1 (fr)
FI (1) FI3854985T3 (fr)
MX (1) MX2021000870A (fr)
PL (1) PL3854985T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023126031A (ja) * 2022-02-28 2023-09-07 株式会社トーメック 地中推進体およびそれを用いた敷設方法。

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2336338A (en) * 1932-04-20 1943-12-07 John A Zublin Apparatus for drilling bores deviating from existing well bores
US2515365A (en) * 1947-03-31 1950-07-18 Edward Adolphus Zublin Flexible drill pipe
US2642267A (en) * 1951-01-17 1953-06-16 John A Zublin Apparatus for initiating and drilling deviating curved bores from existing vertical wll bores
EP2896780A1 (fr) 2014-01-17 2015-07-22 Sandvik Mining and Construction Lyon SAS Tige de forage flexible

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2336338A (en) * 1932-04-20 1943-12-07 John A Zublin Apparatus for drilling bores deviating from existing well bores
US2515365A (en) * 1947-03-31 1950-07-18 Edward Adolphus Zublin Flexible drill pipe
US2642267A (en) * 1951-01-17 1953-06-16 John A Zublin Apparatus for initiating and drilling deviating curved bores from existing vertical wll bores
EP2896780A1 (fr) 2014-01-17 2015-07-22 Sandvik Mining and Construction Lyon SAS Tige de forage flexible

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023126031A (ja) * 2022-02-28 2023-09-07 株式会社トーメック 地中推進体およびそれを用いた敷設方法。

Also Published As

Publication number Publication date
FI3854985T3 (fi) 2023-04-04
MX2021000870A (es) 2021-07-23
EP3854985B1 (fr) 2023-03-08
PL3854985T3 (pl) 2023-06-05

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