WO2005073495A1 - Dispositif permettant de forer des trous profonds dans des structures geologiques - Google Patents

Dispositif permettant de forer des trous profonds dans des structures geologiques Download PDF

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Publication number
WO2005073495A1
WO2005073495A1 PCT/EP2005/000455 EP2005000455W WO2005073495A1 WO 2005073495 A1 WO2005073495 A1 WO 2005073495A1 EP 2005000455 W EP2005000455 W EP 2005000455W WO 2005073495 A1 WO2005073495 A1 WO 2005073495A1
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WO
WIPO (PCT)
Prior art keywords
drilling
drilling mast
mast
longitudinal direction
drill
Prior art date
Application number
PCT/EP2005/000455
Other languages
German (de)
English (en)
Inventor
Andreas Beck
Original Assignee
Max Streicher Gmbh & Co. Kg Aa
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 Max Streicher Gmbh & Co. Kg Aa filed Critical Max Streicher Gmbh & Co. Kg Aa
Publication of WO2005073495A1 publication Critical patent/WO2005073495A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B15/00—Supports for the drilling machine, e.g. derricks or masts
    • E21B15/04—Supports for the drilling machine, e.g. derricks or masts specially adapted for directional drilling, e.g. slant hole rigs

Definitions

  • the present invention relates to a drilling device. More specifically, the present invention relates to an apparatus for making substantially deep holes in geological structures and layers. In particular, the present invention relates to a device for producing vertical bores for developing deposits.
  • the term “deposit” generally encompasses an occurrence of a substance in liquid, gaseous or solid form or energetically usable conditions in geological layers, in particular petroleum, natural gas and geothermal energy.
  • a drilling tool (the drilling head) is connected to a rotary drive arranged above the surface of the earth by a drill string.
  • the drill string consists of standard rods screwed together and special units such as drill rods, non-magnetic rods, centering units, flushing motors, etc., which are used as required.
  • special units such as drill rods, non-magnetic rods, centering units, flushing motors, etc., which are used as required.
  • a variety of Standard rods are gradually joined together depending on the drilling progress.
  • a prior art hanger 90 is shown in FIG. 5 shown. Accordingly, the drill string is held by means of a hook 901, which is connected to a cable winch 905a with an integrated brake 905b, the so-called hoist 905, by means of a block and tackle constructed from an upper block 904, a lower block 902, the driving cable 903a and the pulling cable 903b. On the other side of the upper bottle 904, a dead rope 903c is connected to a reserve rope drum 906. The weight of the drill string and drilling tool is absorbed by this structure (the lifting device).
  • FIG. 6 the rotary movement via driver rods 701, so-called Kelly rods, which have a polygonal (here square) cross section, is carried out by a rotary table 703 by means of a connecting piece 702 which is in the rotary table 703 engages with driver pins and which supports the Kelly bar 701 axially displaceably and grips positively in the direction of rotation, transferred to the drill string 709.
  • the Kelly rod 701 is suspended in the suspension device 90 from FIG. 5 and rotatably mounted.
  • FIG. 7 Another prior art solution is shown in FIG. 7.
  • the counter torque is recorded via a carriage 803 on rails 804 which are firmly connected to the derrick.
  • Directional drilling is made possible by controllable drilling tools, provided that the minimum rod or pipe radius and the available load from the weight of the string allow.
  • the hoist with the pull rope and the reserve rope drum with the dead rope are either led outwards from the top of the drilling mast or arranged inside a drilling tower.
  • This arrangement of rope drums, deflection rollers and ropes on the one hand requires a not insignificant parking space.
  • the ropes, which are subject to changing and sometimes very high tensile stress, are a considerable source of interference and a risk of accidents.
  • Newer drilling methods such as casing drilling, are not possible with conventional technology near the surface.
  • Fig. 8 a folding mast according to the prior art is shown as an example, which has a total height of almost 45 m.
  • the mast according to FIG. 8 has the known closed mast constructions, in which the drill string and the entire drive and Suspension technology is arranged inside a completely closed steel framework construction.
  • an object of the present invention is to provide an apparatus for producing vertical bores which can be used in the vicinity of, and even within, an urban environment, the noise emission of which is reduced compared to known apparatus, which is capable of , regardless of the dead weight of the drill string without significant modifications and additional units and components, to exert the optimal contact pressure on the drill string or the drilling tool, as well as to drive into a pressurized borehole without essential additional technology and to drill any borehole geometries including curves and rising sections with a view to Transport, assembly and disassembly causes lower costs in comparison to conventional devices and which overall requires a small assembly area.
  • a resultant task is to provide a device for producing vertical bores, which has a lower overall height than conventional devices and is capable of independently exerting pressure on the drill string.
  • Another object of the present invention is to simplify the construction of a vertical drilling rig and to make it safer.
  • the device for producing substantially vertical bores in geological layers by means of a drilling tool and a drill string consisting of a plurality of segments comprises: a vertically erected mast; a pair of racks attached to the mast and extending parallel to each other substantially the length of the mast in the longitudinal direction thereof; Guide surfaces attached to the mast and extending substantially the length of the mast in the longitudinal direction thereof; a carriage which is guided on the guide surfaces in the main direction of the mast on an outer side thereof; a drill motor for rotating the drill string, the drill motor being fastened to the slide and the axis of rotation of the drill motor being parallel to the longitudinal direction of the mast; and at least a pair of feed motors mounted on the carriage and mesh with one of the racks via a pinion.
  • a drilling device with this structure and the drill motor on a slide works according to the Topdrive principle.
  • the feed motors and the pinions can apply longitudinal forces to the drill motor and thus to the drill string. This eliminates the need for a superstructure to accommodate the suspension device. Long cables running from the top of the mast and under tension are also eliminated, which contributes to the operational and accident safety of the system and to a reduction in the space required.
  • a gear mechanism is preferably provided between the feed motors and the pinions. As a result, the output torque of the feed motors can be adapted to requirements, in particular increased.
  • a holding brake is preferably provided between the feed motors and the pinions. In this way, a targeted braking torque can be applied to the output shaft of the feed motors.
  • the drill motor and the feed motors can be electric motors or hydraulic motors.
  • the holding brakes are preferably hydraulic in this case Multi-disc brakes, which are determined by a pretensioning force in the depressurized state and released by applying hydraulic pressure.
  • Multi-disc brakes which are determined by a pretensioning force in the depressurized state and released by applying hydraulic pressure.
  • the mast with the toothed racks and guide surfaces preferably consists of at least two modules or sections arranged one behind the other in the longitudinal direction, and the individual modules have means for centering and connecting to one another.
  • the mast can be delivered in several, preferably two, pre-assembled sections to the drilling site and assembled there aligned to one another.
  • the length of the modules can be adapted to the internal dimensions of a standard container, thereby avoiding special transports.
  • the mast is preferably pivotally mounted at its lower end toward the side facing away from the slide and is supported by struts, the struts being located on the side of the mast facing away from the slide.
  • the struts allow the partially considerable moments that are conducted into the mast via the drill string and the drill motor of the lateral arrangement of the slide as tensile and compressive forces. They are located on one side of the mast where they cannot interfere with the carriage's movements.
  • the struts preferably each have a length change device for changing the length of the struts.
  • the length change device can have a cylinder.
  • the device preferably has an erection device for erecting the mast.
  • the erecting device can have a cylinder. With the erection device, the mast can be brought from an essentially horizontal position into its working position and vice versa. This quasi self-erecting property of the mast means that there is no need to erect it with a crane, which represents considerable effort and a potential risk of accident.
  • the device preferably has a breaking and countering device for boring bars, casing and accessories provided on the drilling mast.
  • the breaking and countering device can be moved on the entire mast in its main direction independently of the feed slide.
  • the breaking and locking device is used to screw and loosen segments with and from each other and with and from the chuck.
  • a cable winch is preferably pivotally attached to the side of the drilling mast. This enables loads to be lifted independently of the sled.
  • the mast and the struts are preferably mounted on a platform which has a self-supporting base frame.
  • At least two, in particular three, pairs of feed motors are preferably provided. Basically, two bearing points are required to absorb moments, each of which can absorb forces in opposite directions. In the case of a running rail / running wheel or toothed rail / gear wheel, which only absorb vertical bearing forces in the direction of pressure, this means that two pairs of wheels must be provided for each torque level. It is therefore advisable to distribute the driving force of the gearwheels over two pairs that are already present. An additional, third pair of driven gear wheels and thus feed motors serves for redundancy and better metering of the driving forces.
  • the device preferably has an energy supply unit and a control station, which are provided separately from one another and at a certain distance from the drilling axis in a container construction. Thanks to the container design, the drive unit and control station can be pre-assembled in the factory and transported to the drilling site using standard container transports. They are also protected from external influences and can be placed in a suitable location depending on the circumstances.
  • Brief description of the drawings 1 shows a side view of a drilling device according to the present invention.
  • FIG. 2 shows a front view of the drilling device from FIG. 1.
  • FIG. 3 shows a side view of the drilling device of Fig. 1 in an inclined position.
  • FIG. 4 shows an overall side view of a drilling system with the drilling device from FIG. 1 and additionally provided devices.
  • FIG. 5 shows a schematic illustration of a suspension device according to the prior art.
  • FIG. 6 shows a side view of a central region of a turntable arrangement according to the prior art in partial section.
  • FIG. 7 shows a perspective illustration of a top drive arrangement according to the prior art.
  • FIG 8 shows a side view of a drilling device with a tilting mast according to the prior art.
  • the drilling device essentially consists of a drilling mast 1, a feed carriage 2 movable thereon and a platform 3.
  • the platform 3 is designed as a self-supporting welded steel structure, the so-called base frame 31, and has a pivot bearing 32 approximately in the middle, in the area of the rear corners two support bearings 33 and an additional bearing point 34 in between.
  • the drilling mast 1 is pivotably mounted on the base frame 31 in the pivot bearing 32 and is braced in the pivoting direction via two struts 6, which are supported in the support bearings 33 and are fastened in a bearing point 12 on both sides of the drilling mast 1.
  • the drilling mast 1 is fixed by the struts 6 in a vertical orientation, ie perpendicular to the surface of the earth.
  • the length of the strut 6 can be changed to a certain extent via a deflection cylinder 61 arranged in the strut 6, so that angular deviations of the drilling mast 1 from the vertical are possible. This makes the borehole accessible for various tasks, such as handling a crane.
  • the drilling mast 1 can be moved from a substantially horizontal position into the vertical working position via a lifting cylinder 7, which is supported in the bearing point 34 on the base frame 31 and in a further bearing point 15 on the drilling mast 1. This makes it easy to erect and lower the drilling mast 1 for assembly, disassembly, Maintenance and repair possible.
  • the lifting cylinder 7 can also be omitted if the drilling mast 1 is set up with a crane.
  • the drilling mast 1 is also a welded steel structure with an elongated box shape.
  • the drilling mast 1 is produced in the form shown in two modules, namely a lower mast 11a and an upper mast 11b.
  • the lower mast 11a and the upper mast 11b are connected in alignment with one another by suitable centering and connecting means 19.
  • the centering and connecting means 19 can, for example, be flanges provided on opposite end faces of the upper mast 11a and the lower mast 11b, which are aligned via centering bolts and firmly but releasably connected to one another by means of screws and nuts.
  • the individual modules have a size that is adapted to the loading space of a standard container.
  • the modular construction on the one hand minimizes the assembly time on the construction site, but on the other hand no special transports of the entire pre-assembled mast are necessary, but the transport is limited to standard transports. Furthermore, all structural components for supporting the construction are located on the rear side of the drilling mast 1. As a result, the front of the drilling mast 1 is free of any supports.
  • two toothed racks 14 extend over the entire length of the drilling mast 1, as shown in FIGS. 1 and 2.
  • the racks 14 are secured by suitable fasteners such as screws or Welding associated with the drilling mast.
  • the racks 14 are divided in the length of the modules 11a, 11b of the drilling mast 1 and are preassembled before delivery.
  • guide rails 13 extend over the entire length of the drilling mast 1.
  • the guide rails 13 are likewise connected and divided to the drilling mast 1 or the toothed racks 14 by suitable fastening means such as screws or welding. They are also divided in the length of the modules 11a, 11b of the drilling mast 1 and are preassembled before delivery.
  • the toothed racks 14 are each located on the lateral surfaces of the drilling mast 1, and one of the guide rails 13 is located behind the toothed rack 14. It goes without saying that various arrangements in technology, Combinations and geometries of racks and guide rails are known that can be used.
  • the feed carriage 2 is supported forwards and backwards in the running surfaces of the guide rails 13 by means of attached rollers, not shown, and is thus displaceably mounted in the main direction or in the longitudinal direction of the drilling mast 1, that is to say upwards and downwards.
  • the travel movement of the feed carriage 2 and the lateral support against the drilling mast 1 is carried out by toothed wheels or pinions 24 engaging in the toothed racks 14, which in turn are driven by feed motors 21 mounted on the feed carriage 2.
  • the feed motors 21 are designed as hydraulic motors in the preferred embodiment. These are sufficiently safe in potentially explosive drilling projects. In a non-hazardous environment, electric motors can also be used as feed motors.
  • the feed motors 21 are arranged in pairs. In the preferred embodiment, three pairs of feed motors 21 (and thus pinions 24) are provided, but there may also be more or fewer pairs. For reasons of stability, however, there should be at least two pairs of pinions 24, one of which can theoretically be without a drive. For reasons of redundancy and controllability, however, all pinions should preferably be driven.
  • the holding brakes 23 are designed as multi-disc brakes which block under spring preload and can be released by applying hydraulic pressure.
  • the feed carriage can deliver 2 compressive and tensile forces both at a standstill and in motion. Furthermore, due to the construction described above with guide rails / rollers and toothed racks / pinions, the drilling mast 1 can absorb all the tensile and compressive forces, bending and torsional moments and transverse forces occurring on the feed carriage 2 and dissipate them into the platform 3.
  • the drill motor 25 is in the preferred one Embodiment designed as a hydraulic motor and thus has sufficient safety on explosion-prone drilling projects. In a non-hazardous area, an electric motor can also be used as a drill motor 25.
  • a chuck 26 for receiving the drill string (not shown in more detail) is fastened to the drill motor 25.
  • the drilling device of the present invention is thus constructed according to the top drive principle, in which the drill motor is always located at the upper end of the uppermost rod of the drill string.
  • all longitudinal forces are caused by the feed motors 21 and the rack 14 applied. This eliminates the entire superstructure, which ultimately only serves to take up the deflection roller, the pulley block and the hook and to take up the excess part of its weight plus that of the drill motor 25 and the drill string including the drilling tool.
  • a breaking and countering device 83 for boring bars, casings and accessories is also installed, which can be moved on the entire drilling mast, independently of the feed carriage 2.
  • a pivotable cable winch 84 is attached to the side of the drilling mast. This makes it easy to handle loads. As stated above, certain angular deviations of the drilling mast from the vertical are possible via deflection cylinders 61 arranged in the struts 6. This means that the drilling mast can be tilted away, for example when working on the borehole, which is not possible with conventional drilling towers.
  • the drilling mast 1 can be used in any inclination to the surface. This is made possible by the use of supports of different lengths. This opens up completely new areas of application for a drilling device designed for a vertical bore. For example, deposits located under a settlement or other areas that are inaccessible, such as mountains, can be reached by first drilling at an angle and later directing the hole vertically if necessary.
  • the cable winch 84 is not used when working at angles other than the vertical.
  • FIG. 3 Such a configuration of the drilling device with a drilling angle of approximately 45 ° is shown in FIG. 3.
  • the base frame 31 is designed to be self-supporting. This enables drilling with or without a cellar and with or without a substructure without modifications.
  • An advantageous substructure which was developed by the applicant of the present invention, forms the subject of the German utility model application entitled "Substructure for a deep drilling platform" (attorney file number B / 22ST0409 / DE) from the same filing date. The disclosure content there is based on Full reference is made within the scope of the present application.
  • FIG. 4 shows a side view of an overall system with the drilling device according to the present invention.
  • the energy supply is provided by a hydraulic unit 81 provided in a container construction.
  • the control station 82 is also housed in a container.
  • the containers for hydraulic unit 81 and steering position 82 are arranged outside of platform 3. This means that an optimal distance from the borehole can always be maintained.
  • Hydraulic energy is supplied from the hydraulic unit 81 to the drill motor 25 and the feed motors 21 via hydraulic lines 85 (see FIG. 2) which are guided in articulated chains 86 in the upper region of the drilling mast 1.
  • the height is reduced by eliminating the hook, pulley block, deflection roller and superstructure. Therefore, the minimum clearances required for buildings and traffic routes as well as for containers and peripheral plant components can be reduced.
  • the drilling site required is becoming smaller and noise emissions can be reduced.
  • the desired contact pressure can be provided at any time by the combination of Topdrive and motor feed. So you can start with the one you need Contact pressure can be drilled without having to use drill collars or even to install additional devices. When reaching a depth at which the weight of the drill string is sufficient to ensure the required contact pressure, the excess weight can be absorbed by the feed motors. Directed bores can be carried out regardless of contact pressure losses due to skin friction.
  • the drilling axis in the drilling device according to the present invention is freely accessible. This simplifies the handling of the individual segments of the drill string outside the borehole, for example in a pipe store, is enormous.
  • a new type of automated tube or rod bearing which was developed by the applicant of the present invention, forms the subject of the German utility model application entitled "Tube or rod bearing for a drilling rig" (attorney file number B / 22ST0411 / DE) from the same filing date. The content of the disclosure there is referred to in full in the context of the present application.
  • Newer drilling methods such as casing drilling near the surface, are readily possible with the drilling device of the present invention.
  • the assembly and dismantling time of the drilling rig and the transportation costs and transportation times are due to the modular construction of the drilling device, in particular of the drilling mast 1, the self-erecting ability of the drilling mast 1 by means of the lifting cylinder 7 and the compact, preassembled configuration of the entire complex of drill drive 25 and feed 21, 22, 23, 24 on a single carriage 2 are particularly low. Due to the comparatively small peripheral technology and the overall compact design, not many transports are necessary when changing construction sites, which can also be limited to transports with standard containers. Overall, the drilling site is inexpensive, so that even smaller deposits can be developed economically.

Abstract

Dispositif permettant de forer des trous essentiellement verticaux dans des couches géologiques à l'aide d'un outil de forage et d'une garniture de forage constituée d'une pluralité de tiges. Ledit dispositif de forage possède un mât de forage (1) à orientation essentiellement verticale, au moins deux crémaillères (14) qui sont fixées sur le mât de forage (1) et s'étendent parallèlement l'une à l'autre essentiellement sur la longueur du mât de forage (1) dans le sens longitudinal de ce dernier, des surfaces de guidage (13) qui sont installées sur le mât de forage (1) et s'étendent essentiellement sur la longueur du mât de forage (1) dans le sens longitudinal de ce dernier, un chariot (2) guidé sur les surfaces de guidage (13) et pouvant être déplacé dans le sens longitudinal du mât de forage (1) sur une face externe de ce dernier, un moteur de forage (25) destiné à faire tourner la garniture de forage et fixé sur le chariot (2), l'axe de rotation du moteur de forage (25) étant parallèle au sens longitudinal du mât de forage (1), et au moins deux moteurs d'avance (21) fixés sur le chariot (2) et se trouvant en prise avec une des crémaillères (14) par l'intermédiaire d'un pignon (24).
PCT/EP2005/000455 2004-01-28 2005-01-18 Dispositif permettant de forer des trous profonds dans des structures geologiques WO2005073495A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202004001258.8 2004-01-28
DE200420001258 DE202004001258U1 (de) 2004-01-28 2004-01-28 Vorrichtung zum Herstellen von Tiefbohrungen in geologischen Strukturen

Publications (1)

Publication Number Publication Date
WO2005073495A1 true WO2005073495A1 (fr) 2005-08-11

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WO (1) WO2005073495A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1783281A1 (fr) * 2005-10-14 2007-05-09 BAUER Maschinen GmbH Machine pour porter des foreurs du sol
DE102008038391A1 (de) 2008-08-20 2010-02-25 Max Streicher Gmbh & Co. Kg Aa Bohranlage und Montageverfahren für diese
DE102008038456A1 (de) 2008-08-20 2010-02-25 Max Streicher Gmbh & Co. Kg Aa Bohranlage
US20130327543A1 (en) * 2012-05-14 2013-12-12 Nabors Drilling International Limited Drilling Rig Carriage Movable Along Racks and Including Pinions Driven by Electric Motors
US9267341B2 (en) 2012-05-14 2016-02-23 Nabors Drilling International Limited Drilling rig employing pivoting drilling tower
CN107795285A (zh) * 2016-03-11 2018-03-13 泉州泉港润美环保科技有限公司 一种钻井钻柱的旋转驱动和推送机构
CN109184556A (zh) * 2018-08-20 2019-01-11 郭鸿洲 一种便于煤矿开采用爆破打孔用的打孔装置
CN109630029A (zh) * 2018-12-05 2019-04-16 恒天九五重工有限公司 一种旋挖钻机的桅杆和桅杆升杆方法
WO2022192192A1 (fr) * 2021-03-10 2022-09-15 Longyear Tm, Inc. Dispositifs, systèmes et procédés de récupération de tubes internes

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US7255180B2 (en) * 2004-05-03 2007-08-14 Drillmar, Inc. Modular drill system requiring limited field assembly and limited equipment support
DE102015009062A1 (de) 2015-07-16 2017-01-19 Prime Drilling Gmbh Bohranlage
CN106401469A (zh) * 2016-08-26 2017-02-15 陕西斯达防爆安全科技股份有限公司 一种全方位深孔钻机
CN106695989A (zh) * 2016-12-24 2017-05-24 桐城市五强彩钢制品有限公司 一种可调型打孔器

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US3680412A (en) * 1969-12-03 1972-08-01 Gardner Denver Co Joint breakout mechanism
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Cited By (19)

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Publication number Priority date Publication date Assignee Title
US7556107B2 (en) 2005-10-14 2009-07-07 Bauer Maschinen Gmbh Construction machine for foundation construction
EP1783281A1 (fr) * 2005-10-14 2007-05-09 BAUER Maschinen GmbH Machine pour porter des foreurs du sol
US9109399B2 (en) 2008-08-20 2015-08-18 Max Streicher Gmbh & Co. Kg Aa Drilling station
DE102008038391A1 (de) 2008-08-20 2010-02-25 Max Streicher Gmbh & Co. Kg Aa Bohranlage und Montageverfahren für diese
DE102008038456A1 (de) 2008-08-20 2010-02-25 Max Streicher Gmbh & Co. Kg Aa Bohranlage
US8393416B2 (en) 2008-08-20 2013-03-12 Max Streicher Gmbh & Co. Kg Aa Drilling rig and mounting method therefor
US9273524B2 (en) 2012-05-14 2016-03-01 Nabors Drilling International Limited Drilling rig carriage movable along racks and including pinions driven by electric motors
US9267341B2 (en) 2012-05-14 2016-02-23 Nabors Drilling International Limited Drilling rig employing pivoting drilling tower
US20130327543A1 (en) * 2012-05-14 2013-12-12 Nabors Drilling International Limited Drilling Rig Carriage Movable Along Racks and Including Pinions Driven by Electric Motors
US9309728B2 (en) 2012-05-14 2016-04-12 Nabors Drilling International Limited Drilling rig employing tubular handling device
US9410382B2 (en) 2012-05-14 2016-08-09 Nabors Drilling International Limited Drilling rig carriage movable along racks and including pinions driven by electric motors
US9790751B2 (en) 2012-05-14 2017-10-17 Nabors Drilling International Limited Drilling rig employing top drive
US10060199B2 (en) * 2012-05-14 2018-08-28 Nabors Drilling International Limited Drilling rig carriage movable along racks and including pinions driven by electric motors
CN107795285A (zh) * 2016-03-11 2018-03-13 泉州泉港润美环保科技有限公司 一种钻井钻柱的旋转驱动和推送机构
CN107795285B (zh) * 2016-03-11 2019-07-02 淮北四兴工贸有限责任公司 一种钻井钻柱的旋转驱动和推送机构
CN109184556A (zh) * 2018-08-20 2019-01-11 郭鸿洲 一种便于煤矿开采用爆破打孔用的打孔装置
CN109630029A (zh) * 2018-12-05 2019-04-16 恒天九五重工有限公司 一种旋挖钻机的桅杆和桅杆升杆方法
CN109630029B (zh) * 2018-12-05 2020-10-02 恒天九五重工有限公司 一种旋挖钻机的桅杆和桅杆升杆方法
WO2022192192A1 (fr) * 2021-03-10 2022-09-15 Longyear Tm, Inc. Dispositifs, systèmes et procédés de récupération de tubes internes

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