US20120304553A1 - Drilling rig system with self-elevating drill floor - Google Patents

Drilling rig system with self-elevating drill floor Download PDF

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Publication number
US20120304553A1
US20120304553A1 US13/487,186 US201213487186A US2012304553A1 US 20120304553 A1 US20120304553 A1 US 20120304553A1 US 201213487186 A US201213487186 A US 201213487186A US 2012304553 A1 US2012304553 A1 US 2012304553A1
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US
United States
Prior art keywords
floor
drill floor
base
towers
drill
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.)
Abandoned
Application number
US13/487,186
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English (en)
Inventor
Kameron Wayne Konduc
Donald Leonard BURLET
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.)
National Oilwell Varco LP
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National Oilwell Varco LP
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Filing date
Publication date
Application filed by National Oilwell Varco LP filed Critical National Oilwell Varco LP
Priority to US13/487,186 priority Critical patent/US20120304553A1/en
Assigned to NATIONAL OILWELL VARCO, L.P. reassignment NATIONAL OILWELL VARCO, L.P. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BURLET, DONALD LEONARD, KONDUC, KAMERON WAYNE
Publication of US20120304553A1 publication Critical patent/US20120304553A1/en
Priority to US14/527,537 priority patent/US9458675B2/en
Priority to US15/255,740 priority patent/US10094136B2/en
Abandoned legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
    • E04H12/344—Arrangements for lifting tower sections for placing additional sections under them
    • 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
    • E21B15/00—Supports for the drilling machine, e.g. derricks or masts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/343—Structures characterised by movable, separable, or collapsible parts, e.g. for transport
    • E04B1/34315—Structures characterised by movable, separable, or collapsible parts, e.g. for transport characterised by separable parts
    • E04B1/34331—Structures characterised by movable, separable, or collapsible parts, e.g. for transport characterised by separable parts mainly constituted by three-dimensional elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/343—Structures characterised by movable, separable, or collapsible parts, e.g. for transport
    • E04B1/34384—Assembling details for foldable, separable, collapsible or retractable structures
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/18—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures movable or with movable sections, e.g. rotatable or telescopic
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
    • E04H12/345—Arrangements for tilting up whole structures or sections thereof

Definitions

  • the present disclosure relates in general to rig structures for drilling wells such as oil and gas wells.
  • the disclosure relates to rig structures that can be readily transported, rapidly erected, and rapidly disassembled, and further relates to methods for erecting such rig structures.
  • drill string an assembly of drill pipe sections connected end-to-end
  • the drill string is typically rotated by means of a “rotary table” or a “top drive” associated with a drilling rig erected at the ground surface over the wellbore.
  • the primary components of a typical drilling rig include a base support structure, a drill floor, and a mast (also called a derrick) supported on and extending upward from the drill floor.
  • the drill floor is typically elevated well above the ground surface to provide space to accommodate and allow access to various equipment required for drilling operations.
  • An arrangement of pulleys (sheaves) called a crown block is mounted to the top of the rig mast.
  • Hoisting apparatus called a drawworks, comprising a cable drum, a cable winch, and ancillary equipment, is provided in association with the drill floor.
  • Wire-rope cable is fed from the cable drum up to the crown block and threaded over the various sheaves in the crown block, and then down to a “traveling block”, which is an assembly of sheaves that is free to move vertically within the mast structure as the wire-rope cable (“drill line”) is played out or taken up by the cable winch and drum of the drawworks.
  • the traveling block has a lifting hook to support equipment used to raise and lower the drill string, and to add pipe sections during drill string assembly (or “make-up”) and to remove pipe sections during drill string disassembly (“break-out”). For drilling operations using a top drive instead of a rotary table to rotate the drill string, the top drive is suspended from the traveling block hook.
  • Known transportable rigs commonly feature what is called a “bootstrap mast”.
  • a bottom mast section having a large lower opening on one side is mounted to the drill floor, using a mobile crane.
  • the crane then lowers the top section of the finished mast (housing the crown block) into the bottom mast section, and the top mast section is temporarily pinned to the bottom mast section.
  • the crane positions an intermediate mast section through the opening in the bottom mast section so that the upper end of the intermediate mast section can be securely connected to the lower end of the upper mast section.
  • the traveling block is then lowered to engage and support the intermediate section, the upper mast section is unpinned from the bottom mast section, the drawworks is actuated to hoist the upper and intermediate mast sections a distance corresponding to the height of the intermediate mast section, and then the partially-constructed mast assembly (i.e., upper section plus one intermediate section) is temporarily pinned to the stationary bottom mast section.
  • This latter process is then repeated as necessary to install additional intermediate mast sections until the mast has reached its intended final height, whereupon the lowermost intermediate mast section is secured to the bottom mast section so that the rig is ready to be put into service.
  • Drilling sites are often located in remote areas requiring truck transportation of rig components and equipment required for rig assembly (or “rig-up”). Further complicating the rig-up process is the common need to relocate the rig to a more promising site after a wellbore has been drilled and it has been determined that the wellbore will not be sufficiently productive to warrant completion and operation of the well.
  • Wellsite changes can occur once every several months, and, in response, prior art rig systems have attempted to increase the mobility of rig components and the efficiency of rig erection and disassembly procedures in order to minimize associated costs.
  • the need for auxiliary equipment typically remains necessary for performing steps such as placing the drill floor.
  • Wasterval teaches the construction of a drill floor over a base structure, which is provided with hydraulic cylinders for raising the drill floor above the base structure. After the drill floor has been raised by an increment corresponding to the stroke of the hydraulic cylinders, a first set of box beams are disposed between the drill floor and the base structure, and the box beams are anchored to the drill floor. The lift cylinders on the base structure can then be retracted to engage lift points on the box beams.
  • the lift cylinders are then actuated again, this time to raise both the drill floor and the first box beams anchored thereto. This allows insertion of a second set of box beams between the base structure and the first set of box beams, thus elevating the drill floor a further incremental amount. This procedure is repeated as necessary to install additional sets of box beams until the drill floor has reached its intended elevation.
  • the Wasterval system thus allows the drill floor to be erected or constructed close to ground level, followed by erection of the rig mast on the drill floor, whereupon the drill floor (with erected mast) can be elevated as required.
  • this system has an inherent drawback in that the rig floor raising procedure has to be carried out in incremental and comparatively complex stages, and is correspondingly complex and time-consuming.
  • the Wasterval system entails the provision of a robust hydraulic system, which might not otherwise be needed on site during rig-up, and thus increases rig-up costs.
  • the Wasterval system requires the use of mobile cranes or other auxiliary hoisting equipment to manipulate and position the box beams, further adding to rig-up costs.
  • the present disclosure teaches a transportable drilling rig apparatus having a drill floor that can be elevated after erection of the rig mast, without requiring a hydraulic system or auxiliary hoisting equipment.
  • the rig's traveling block and drawworks are used to elevate the drill floor.
  • a worm gear drive mechanism can be used to elevate the drill floor.
  • the rig apparatus includes a rig base structure comprising a plurality of base towers that can be positioned in a suitable spaced relationship on a wellsite.
  • a rig base structure comprising a plurality of base towers that can be positioned in a suitable spaced relationship on a wellsite.
  • a generally horizontal base frame is installed between lower regions of the towers, thus tying the towers together to form a suitably rigid and stable rig base structure.
  • the towers may be provided with height adjustment mechanisms (e.g., hydraulic jacks) to facilitate leveling the base structure over uneven ground surfaces.
  • the towers may optionally be provided with “walking” mechanisms whereby the lateral positions of the towers can be adjusted prior to installation of the horizontal base frame.
  • the walking mechanisms can be coupled for cooperative actuation to
  • a drill floor can then be constructed over the horizontal base frame of the rig base structure.
  • the drill floor may comprise multiple slab sections that are anchored to each other after being positioned over the base frame to form an integral drill floor structure.
  • the horizontal base frame can be advantageously set at a height above ground corresponding to the level of a flatbed truck or trailer, thus facilitating unloading of drill floor sections by shifting them laterally off the trailer bed onto the base frame.
  • the drill floor is mated to the towers with suitable guide means such that the drill floor can be uniformly elevated relative to the towers, with the towers acting to provide lateral stability to the drill floor at all stages of the floor-elevating process.
  • the drill floor has been elevated to the required elevation, it is locked to the towers by any suitable means, such as but not limited to hydraulic clamps.
  • the drill floor is elevated using only the rig's traveling block and drawworks.
  • sheave assemblies are mounted to and under the drill floor adjacent to each tower.
  • Each tower has a floor-lifting cable anchored to an upper region of the tower and disposable under and around the corresponding sheave assembly associated with the drill floor, such that the free (i.e., non-anchored) ends of the floor-lifting cables converge toward a central area of the drill floor.
  • the free ends of all floor-lifting cables can be engaged by the traveling block hook.
  • the drawworks can then be actuated to raise the drill floor in one continuous operation.
  • FIG. 1 is an elevation illustrating the unloading of base towers from a transport truck and positioning of the towers on a wellsite.
  • FIG. 2 is an elevation illustrating a horizontal base frame interconnecting the rig towers.
  • FIG. 3A is a first elevation view of an embodiment of a drilling rig structure in accordance with the present disclosure, showing the drill floor installed over the horizontal base frame, with a rig mast in an early stage of erection upon the drill floor.
  • FIG. 3B is a second elevation view of the assembly in FIG. 3A .
  • FIG. 4A is a first elevation view similar to FIG. 3A , after complete erection of the rig mast, with the floor-raising cables engaging the traveling block hook in preparation for elevating the drill floor.
  • FIG. 4B is a second elevation view of the assembly in FIG. 4A .
  • FIG. 5A is a first elevation view similar to FIG. 4A , after the drill floor has been elevated and the rig is ready to be put into service.
  • FIG. 5B is a second elevation view of the assembly in FIG. 5A .
  • FIG. 6 is a plan cross-section through the base towers of one embodiment of a drilling rig structure and drill floor layout in accordance with the present disclosure, prior to elevation of the drill floor.
  • FIGS. 1 through 5B progressively illustrate the steps involved in assembling one embodiment of a transportable drilling rig in accordance with present disclosure.
  • FIGS. 1 and 2 depict the delivery and positioning of a plurality of base towers 10 at a drill site.
  • towers 10 will be provided with adjustment means 12 for adjusting their height, lateral position, and vertical alignment.
  • adjustment means 12 for adjusting their height, lateral position, and vertical alignment.
  • Persons skilled in the art will know that such means can be provided in a variety of ways using known technologies, and such means do not constitute components of the broadest embodiments of drilling rigs in accordance with this disclosure.
  • Base frame 20 is constructed or installed as shown in FIG. 2 , interconnecting the base towers 10 .
  • Base frame 20 can be of any suitable layout and structural configuration. The structure can also be assembled off the well and “walked” into drilling position if equipped with adjustment means 12 .
  • a drill floor 30 is then constructed over and temporarily supported on base frame 20 , whereupon a rig mast structure 100 can be erected upon drill floor 30 .
  • rig mast 100 is shown as a bootstrap mast of the type described previously herein, comprising:
  • drill floor 30 is provided with a suitable drawworks (generally indicated by reference number 40 ), including a cable drum 42 which carries wire rope used for a drill line fed up and through crown block 122 and down to traveling block 124 as previously described.
  • the rig structure includes four base towers 10 laid out in a rectilinear pattern.
  • Drill floor 30 is configured in the general shape of a cross, with adjacent “arms” of the cross fitted closely around their associated base tower 10 .
  • Reference numbers 35 denote drill floor guide and anchorage means to facilitate stable and uniform vertical movement of drill floor 30 relative to base towers 10 during drill floor lifting operations, and for anchoring drill floor 30 to base towers 10 after drill floor 30 has been elevated to its intended position for drilling operations.
  • the drill floor guide means and the drill floor anchorage means may be separate and independent mechanisms.
  • drawworks 40 The location and general configuration of the drawworks (including cable drum 42 ) are indicated by reference number 40 ; in the illustrated embodiment, drawworks 40 is at least partially installed on a cantilevered section of drill floor 30 .
  • drill floor 30 incorporates a rotary table 135 for rotating a drill string.
  • a driller's control cabin is indicated by reference number 44 .
  • Drill floor 30 may have one or more cantilevered catwalks 31 for worker access.
  • drill floor sheaves 32 A and 32 B are provided in association with each base tower 10 , with the rotational axes of inner and outer drill floor sheaves 32 A and 32 B being parallel and transverse to a radial line extending from their associated base tower 10 to well centerline CL W .
  • drill floor sheaves 32 A and 32 B in the illustrated embodiment are actually mounted below or within the structure of drill floor 30 , they are shown in solid outline in FIG. 6 for purposes of clarity.
  • each base tower 10 there is a set of drill floor sheaves for each base tower 10 , but this is not essential. Alternative embodiments could have one or more base towers 10 that do not have an associated drill floor sheave assemblies. Furthermore, although in the illustrated embodiment each drill floor sheave assembly includes a pair of drill floor sheaves, alternative embodiments could use drill floor sheave assemblies comprising more than two drill floor sheaves or possibly only one drill floor sheave.
  • upper mast section 120 has been positioned and pinned to bottom mast section 110
  • a first intermediate mast section 130 has been positioned within bottom mast section 110 and connected to upper mast section 120 .
  • mast-raising cables 135 anchored to upper regions of bottom mast section 110 extend around sheaves 132 at the lower end of the intermediate mast section 130 disposed within bottom mast section 110 and upward for engagement with traveling block 124 .
  • Drawworks 40 is then actuated to raise traveling block 124 and lift the assembly of upper mast section 120 and intermediate mast section 130 until the lower end of intermediate mast section 130 has been raised sufficiently to allow another intermediate mast section 130 to be positioned within bottom mast section 110 , and so on until rig mast 100 has been constructed to its final intended height as shown in FIGS. 4A and 4B .
  • the mast-raising cables 135 are disengaged from traveling block 124 .
  • a plurality of floor-raising cables 33 are threaded from anchor points 33 X in upper regions of their associated base towers 10 , around drill floor sheaves 32 A and 32 B and then upward for engagement by traveling block 124 , all as seen in FIGS. 4A and 4B .
  • Drawworks 40 is then actuated to raise traveling block 124 , thereby elevating drill floor 30 to an intended service elevation as seen in FIGS. 5A and 5B .
  • Drill floor 30 is then anchored to base towers 10 by suitable anchorage means 35 (which by way of non-limiting example could be provided in the form of hydraulic latches).
  • a worm gear drive unit could be used to elevate drill floor 30 , with guide rollers, and mating racks built into base towers 10 at each corner of drill floor 30 .
  • the worm gear drive mechanism could be actuated by any suitable power means, such as hydraulic or electric motors.
  • a worm gear drive could be provided as a supplement or back-up to a primary cable-implemented floor-raising mechanism.
  • any form of the word “comprise” is to be understood in its non-limiting sense to mean that any item following such word is included, but items not specifically mentioned are not excluded.
  • a reference to an element by the indefinite article “a” does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one such element.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
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  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
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US13/487,186 2011-06-02 2012-06-02 Drilling rig system with self-elevating drill floor Abandoned US20120304553A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US13/487,186 US20120304553A1 (en) 2011-06-02 2012-06-02 Drilling rig system with self-elevating drill floor
US14/527,537 US9458675B2 (en) 2011-06-02 2014-10-29 Method for assembling a drilling rig structure
US15/255,740 US10094136B2 (en) 2011-06-02 2016-09-02 Drilling rig system with self-elevating drill floor

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US201161492786P 2011-06-02 2011-06-02
US13/487,186 US20120304553A1 (en) 2011-06-02 2012-06-02 Drilling rig system with self-elevating drill floor

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US13/487,186 Abandoned US20120304553A1 (en) 2011-06-02 2012-06-02 Drilling rig system with self-elevating drill floor
US14/527,537 Active US9458675B2 (en) 2011-06-02 2014-10-29 Method for assembling a drilling rig structure
US15/255,740 Active 2033-01-19 US10094136B2 (en) 2011-06-02 2016-09-02 Drilling rig system with self-elevating drill floor

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US15/255,740 Active 2033-01-19 US10094136B2 (en) 2011-06-02 2016-09-02 Drilling rig system with self-elevating drill floor

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US (3) US20120304553A1 (de)
EP (1) EP2715034B1 (de)
AU (1) AU2012262632B2 (de)
CA (1) CA2834709C (de)
PL (1) PL2715034T3 (de)
RU (1) RU2589783C2 (de)
WO (1) WO2012162800A1 (de)

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US20150143759A1 (en) * 2013-11-25 2015-05-28 Unit Corporation Box-on-box self-stacking substructure for a drill rig
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CN112744667A (zh) * 2019-10-31 2021-05-04 中石化石油工程技术服务有限公司 海洋平台应急救生系统
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US9458675B2 (en) 2016-10-04
RU2589783C2 (ru) 2016-07-10
AU2012262632A1 (en) 2014-01-09
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RU2013157537A (ru) 2015-07-20
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CA2834709A1 (en) 2012-12-06
EP2715034B1 (de) 2018-07-18
US20150047290A1 (en) 2015-02-19
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PL2715034T3 (pl) 2019-03-29
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