WO2011065836A1 - Dispositif pour une tour pour opérations de puits et son utilisation - Google Patents

Dispositif pour une tour pour opérations de puits et son utilisation Download PDF

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Publication number
WO2011065836A1
WO2011065836A1 PCT/NO2010/000427 NO2010000427W WO2011065836A1 WO 2011065836 A1 WO2011065836 A1 WO 2011065836A1 NO 2010000427 W NO2010000427 W NO 2010000427W WO 2011065836 A1 WO2011065836 A1 WO 2011065836A1
Authority
WO
WIPO (PCT)
Prior art keywords
tower
equipment
riser
platform
work platform
Prior art date
Application number
PCT/NO2010/000427
Other languages
English (en)
Inventor
Vidar Wollum
Jostein Korneliussen
Original Assignee
Odim Jmc
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 Odim Jmc filed Critical Odim Jmc
Priority to US13/511,349 priority Critical patent/US20120318530A1/en
Publication of WO2011065836A1 publication Critical patent/WO2011065836A1/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
    • 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
    • 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 a tower provided with vertically movable platforms, the platforms being independently movable. More particularly, the invention relates to a tower for use in well operations in which, in its position of use, the tower is provided with a lower, vertically movable work platform and an upper, vertically movable equipment platform on its outside.
  • the maintenance work may include plugging, perforation of the well casing, installation of sand screens and installation of valves, among other things.
  • the maintenance work it may be desirable to use lighter equipment than the heavy original drilling equipment, for example a cable (a so-called wire or slick line) , a so- called downhole tractor and coiled tubing.
  • the light-weight equipment is quicker to operate and smaller vessels may be used if the maintenance is to be done on a subsea well.
  • down- hole tools are attached to the end of the wireline, downhole tractor or coiled tubing that is lowered first into the well.
  • tools for fishing up other tools or objects that have either accidentally fallen into the well or got stuck during an operation are also tools for fishing up other tools or objects that have either accidentally fallen into the well or got stuck during an operation.
  • blowout valves are used. They are known in the art as blowout preventers and will be referred to, in what follows, as BOPs .
  • a BOP It is common to place a BOP at the wellhead, for example on the seabed in the case of an offshore well.
  • a riser runs from the wellhead to the cellar deck.
  • the so-called Christmas tree On the riser in the cellar deck is arranged yet another set of valves, the so-called Christmas tree.
  • the Christmas tree is of such arrangement that a wireline, downhole tractor or coiled tubing can be inserted into the riser. This requires that above the - • Christmas tree; -there-should be- a lockT- referred ⁇ to — in ⁇ the ⁇ art as a riser, in which the tool is placed first.
  • the riser When the tool is placed within the riser, the riser is first closed at its upper end and then it is opened at its lower end towards the Christmas tree and the pressure within the riser rises to the same pressure as that in the riser. Then the tool may be lowered down the riser and then down the actual well.
  • the riser is formed of a special set of risers, known in the art as riser joints, which are connected into the desired length.
  • riser joints For extra safety a special BOP is mounted at the upper end of the riser, through which the wireline or coiled tubing runs.
  • Suitable sealing means are arranged around the wireline or coiled tubing in the form of an adjustable seal, known in the art as a so-called pack box or stripper, for the pressure to be maintained in the riser during the operation. Such means are known within the art and further reference will not be made to them here .
  • the tool which is lowered into the well to carry out desired operations may typically be 15 metres long.
  • a perforation gun may be 25 to 30 metres long.
  • the use of such a tool will then require the riser to have at least a corresponding length.
  • the riser will therefore project from the Christmas three up through a possible hatch deck and further through a so-called rig-skidding deck.
  • On this deck there is a skid frame, along which the derrick may be moved horizontally.
  • a special tower may be built around the riser to operate the downhole tool. This tower must be built so high that it projects above the upper end portion of the riser with its BOP and so high that it fixes the equipment which is necessary to drive a wireline or coiled tubing into or out of the well.
  • such equipment may include an injector and, at the top, a so- called goose neck.
  • the tower built for carrying out light well operations cannot be a permanent one.
  • the riser projects up through the rig-skidding deck and this prevents the drilling rig from being movable along the entire skid frame.
  • the tower is therefore built up from tower modules to the necessary height and dismantled again after use. Building and dismantling of the tower takes time, and during this time, other operations cannot be carried out on the well.
  • the tower is made up of many modules that must be hoisted into place. Crane capacity is a scarce resource on a production platform, and a lifting operation is one of the most hazardous operations performed, with respect to the life and health of the personnel.
  • the tower is modular and is not provided with a lift but with internal stairways. These stairways have to be made so wide that injured personnel may be carried down on a stretcher. This causes the footprint of the tower to be relatively big.
  • the riser is at the centre of the tower.
  • the downhole tool must first be hoisted up above the tower and then lowered down through the upper part of the tower until it can be inserted into the upper end of the riser.
  • Operations which include assembling a downhole tool and connecting the complete downhole tool to the wireline or coiled tubing, and also moving the wireline or coiled tubing through the BOP of the riser, are all done at the upper end of the riser. This is cumbersome as the personnel will have to climb a considerable height up the stairs of the tower to get to the work place from the rig- skidding deck.
  • Patent document WO 2009/001088 discloses a tower on board a vessel arranged for the drilling of subsea wells and operations in such wells.
  • the tower is provided with a frame, there being arranged within the frame a first fixed upper platform holding an injector, an adjustable seal and a goose neck, and a second fixed lower platform holding a BOP.
  • the frame is parked outside the tower.
  • the frame Prior to operation the frame is moved sideways into the tower by means of guiding arms and possibly a crane, so that the frame hangs from the crown block of the tower above the centre well, the so-called moon pool, of the vessel.
  • the lifting of tools for assembly is carried out by the cranes of the ship.
  • Patent document GB 2399838 discloses a foldable tower for use in coiled- tubing operations, especially on board a vessel, a floating drilling platform or a tension-leg platform.
  • the tower In its position of use, the tower consists of a frame with two or more vertical frame elements or legs. The purpose of the frame is to transfer the weight of a lower BOP and upper coiled- tubing equipment from the wellhead to the vessel or to the drilling platform. Between the legs of the frame is placed a lower platform for the BOP. This platform can move vertically relative to the frame. Between the legs of the frame is further placed an upper platform for the upper coiled-tubing equipment which includes, inter alia, an injector and a goose neck. This platform can move vertically independently of the BOP platform.
  • the injector can be moved horizontally away from the longitudinal axis of the riser or in towards it.
  • the riser is between the legs of the frame and thus within ⁇ the frame.
  • the frame is further provided with means for heave compensation. Downhole equipment to be placed in the riser is hoisted in by an external crane.
  • the upper transverse element of the frame provides a height restriction for the length of downhole equipment that may be hoisted into the frame.
  • Patent document US 2004/0206551 shows a drilling rig in the form of a mast mounted on a trailer.
  • a platform for a coiled- tubing injector is fixed to one side of the mast and the coiled-tubing injector rests on the platform.
  • the mast is raised by a pivoting arrangement at the lower end of the mast and the pivoting arrangement is fixed to the fixed rotary table of the rig.
  • a BOP hangs underneath the fixed rotary table.
  • Patent document US 6,032,744 discloses a drilling rig in which an injector for coiled-tubing operations, among other things, is hangingly ⁇ mounted underneath a work platform and in which there is a fixed distance between a BOP located below the injector and the injector.
  • a goose neck for guiding the coiled-tubing down into the injector is above the work platform.
  • the injector and the goose neck are therefore separate components.
  • the goose neck can be moved vertically along a mast while the injector is stationary.
  • a reel for the coiled tubing is mounted for vertical movement in said mast.
  • Patent document US 6,431,286 shows a drilling rig provided with a derrick in the form of a bipartite mast mounted on a trailer.
  • a cradle which is arranged to fix a coiled-tubing injector on its bottom side, is movable along the sides of the mast facing each other, and in such a way that the coiled-tubing injector is moved along the outer sides of the mast.
  • the derrick is arranged to hold a BOP.
  • Snubbing means that a pipe string consisting of threaded pipe sections is moved into a pressurized well through a BOP. A jack is used to force the pipe down the well to overcome the well pressure .
  • downhole equipment equipment which is placed in a well and left there.
  • a downhole tool is meant, here, a tool which is moved out of the well again after having performed its task.
  • the invention has for its object to remedy or reduce at least one of the drawbacks of the prior art, or at least provide a useful alternative to the prior art.
  • the invention in a first aspect relates to a device for well operations including a tower with an outside and an inside, the tower being provided, on its outside, with a work platform vertically movable in the position of use and a vertically movable equipment platform which is independently movable relative to the work platform, and the work platform being provided with a hanger device.
  • This has the advantage of there being free access to the centre of the well for hoisting downhole equipment and downhole tools into the well, and of the lift not needing to be higher than for it to freely pass the equipment platform when this is in a low position.
  • This has further the advantage of enabling the connecting of downhole equipment, downhole tools and for example coiled tubing, wireline or a snubbing string to be done from the work platform.
  • the fact that the work platform is provided with a hanger device has the advantage of the work platform temporarily holding the weight of the riser while it is being assembled or disassembled, and while equipment or a tool is being placed in the riser. This has further the advantage of the work platform being usable for lifting or lowering the riser relative to the Christmas tree.
  • the hanger device may include a so-called false rotary and wedge belts. The wedge belts are also called slips.
  • the hanger device may include a gripper claw of a kind known per se .
  • At least one of the work platform and the equipment platform may be provided with attachment means for movable attachment to the outside of the tower.
  • attachment means are well known within the art and may include a guide carriage, a so- called dolly, and an associated dolly guide in the form of a rail .
  • the work platform and the equipment platform can be lifted and lowered in a manner known per se, by the use of, for example, a pitch rack, hydraulic pistons, a winch or sheaves.
  • Necessary motors can be electrically driven or hy- draulically driven. . - — ⁇
  • the work platform may be provided with a BOP.
  • the equipment platform may be provided with at least one piece of well operation equipment selected from the group consisting of an injector, wireline operation equipment and snubbing equip- ment . This has the advantage of the device being usable for several types of well operations.
  • the injector In its position of use, the injector may be provided with means for horizontal and vertical movement relative to the equipment platform.
  • the tower may be arranged to receive a magazine for well equipment such as riser joints, for example.
  • the magazine may be provided with an opening facing the work platform and the equipment platform.
  • the equipment platform may be provided with a pick-up mechanism for manipulating well equipment. This has the advantage of the magazine containing the necessary components and sections for building the riser and these being in a vertical position. The cooperation of the magazine, the vertically movable equipment platform and the pick-up mechanism of the equipment platform, reduces the number of necessary crane lifts, and the assembly will be quicker as the components and sections of the riser may be moved a short, horizontal distance.
  • the tower may be provided with an external, vertically positionable manipulator arm. Because of the external position of the work platform and equipment plat- form, and the fact that they are vertically movable, an external manipulator arm may get sufficiently high up to swing downhole equipment and downhole tools in above the BOP. This has the advantage of enabling the number of lifts by an external crane to be reduced.
  • the tower may be provided with a vertically positionable lift.
  • the tower may be arranged to be transported in a horizontal position and provided with means in the form of, for example, a lug for vertical positioning at a point of use. This has the advantage of the tower being portable as one unit, thereby avoiding work and time for building a modular tower.
  • the invention in a second aspect, relates to a method for well operations including the use of a tower with an outside and an inside, the tower being provided, on its outside, with a work platform vertically movable in the position of use and a vertically movable equipment platform which is independently movable relative to the work platform, and the work platform being provided with a hanger device, the hanger device being temporarily brought to hold a riser or a riser joint fixed.
  • the method may further include the steps of :
  • the method may further include the steps of :
  • the method may further include the steps of:
  • the method may further include the step of :
  • the method may further include the step of :
  • Figure 1 shows a side view of a tower, when in the position of use, having a lower, vertically movable work platform and an upper, vertically movable equipment platform, the work platform being in its lower position;
  • Figure 2 shows a view of the tower and platforms as shown in figure 1, viewed from above.
  • the reference numeral 1 indicates a device in accordance with the invention.
  • a tower 2 is pro- vided, on its outside 22, with an, in the position of use, lower, vertically movable work platform 3 and an upper, vertically movable equipment platform 4.
  • the tower 2 is provided with two vertical guide rails 24.
  • the work platform 3 is provided with at least one dolly 32 which is of a kind known per se, and will not be mentioned in further detail.
  • two dollies 32 each moving along a respective vertical guide rail 24.
  • the equipment platform 4 is provided with at least one dolly 42 of a kind known per se.
  • two dollies 42 each moving along a respective vertical guide rail 24.
  • the tower 2 On its inside 25, the tower 2 is provided with fixed tower decks 26 and ladders 28 for internal access to the different height levels of the tower 2 and for evacuation of the tower.
  • the equipment platform 4 is provided with an injector 5 of a kind known per se, arranged to move coiled tubing (not shown) into and out of a well (not shown) .
  • the injector 5 is provided with a fixed goose neck 52 of a kind known per se. The injector 5 and the goose neck 52 will not be described in detail.
  • the injector 5 stands by way of four height-adjustment mechanisms 54 on an injector base 56 which is movably attached to the equipment platform 4.
  • the injector base 56 is horizontally movable in a direction indicated by an arrow in the drawings and horizontally movable in a direction perpendicular to the indicated direction. Underneath the
  • the injector 5 is provided with an adjustable seal 58 which may be a so-called stripper or a pack box, and a hydraulic quick-release coupling 59 for attachment to a riser joint or a BOP 34.
  • an adjustable seal 58 which may be a so-called stripper or a pack box, and a hydraulic quick-release coupling 59 for attachment to a riser joint or a BOP 34.
  • the work platform 3 is provided with a BOP 34 which is of a kind known per se and will not be mentioned in any further detail.
  • the work platform 3 is further provided with an opening (not shown) for a riser to be passed through vertically, and the work platform is further provided with a hanger device 36 which may be a so-called false rotary with wedge belts, referred to as slips within the art.
  • Figure 2 shows the tower 2 with the equipment platform 4 viewed from above, most of the work platform 3 being hidden.
  • the figure 2 is simplified and some details have been omitted.
  • the tower 4 is arranged to receive a magazine (not shown) for well equipment, such as components for building a riser (not shown) .
  • the magazine is placed in the open space 27 between the guide rails 24.
  • the magazine may be a fingerboard or be arranged to be rotatable.
  • a pick-up mechanism 7 of a kind known per se is arranged to pick up well equipment from the magazine.
  • the pick-up mechanism 7 is movably attached to the injector base 56. In its position of use, the pick-up mechanism 7 may move horizontally in the same direction as the injector base 56, indicated by an arrow, and horizontally in a direction perpendicular to the moving direction of the injector base 56.
  • the tower 2 On its outside 22, the tower 2 is provided with a vertically movable manipulator arm of a kind known per se (not shown) .
  • the manipulator arm is attached to one of the guide rails 24 of the tower and is arranged, in a manner known per se, to move vertically along the guide rail 24.
  • the manipulator arm With a gripping device of a kind known per se, the manipulator arm is arranged to pick up a downhole tool or downhole equipment from the deck (not shown) on which the tower 2 stands, lift it up and carry it in above the centre of the riser and the BOP 34 in order then to lower the tool through the BOP 34 into the riser.
  • the manipulator arm can carry a downhole tool out of the riser and place it on the deck on which the tower 2 stands.
  • the tower 2 On its outside 22, the tower 2 is further provided with a vertically movable lift of a kind known per se (not shown) .
  • the lift is attached to one of the guide rails 24 of the tower and moves vertically along it.
  • the manipulator arm and lift are attached to separate guide rails 24.
  • the lift is arranged to be able to stop at the internal platforms 26 of the tower 2, at the work platform 3, no matter what height level the work platform 3 is at, and at the equipment platform 4, no matter what height level the equipment platform 4 is at.
  • the tower 2 On the outside 22, at its one end portion 29, the tower 2 is provided with a lug 8 on two of the outsides 22 of the tower 2.
  • the tower 2 can be transported in a horizontal position on board a supply ship, for example, and hoisted in its horizontal position over to its point of use.
  • a raising mechanism (not shown) which grips the lugs 8 and raises the tower 2 into a vertical position of use.
  • the magazine with well equipment can be placed between the guide rails 24 of the tower 2 before the tower 2 is raised.
  • the work platform 3 and the equipment platform 4 are hoisted into place, and they are attached via their dollies 32, 42 to the guide rails 24.
  • the manipulator arm and the lift are also hoisted into place and attached to their respective guide rails 24.
  • the work platform 3 is adjusted to the desired level.
  • the equipment platform is provided with the injector 5 and the pick-up mechanism 7.
  • the equipment platform 3 is lifted to the correct height in order to pick up, by means of the pickup mechanism 7, the first riser joint in the magazine between the guide rails 24 of the tower 2.
  • the work platform 3 is provided with a hanger mechanism 36 in the form of a so- called false rotary and slips.
  • the injector base 56 and the pick-up mechanism 7 move the riser joint to the centre of the hanger device 36.
  • the equipment platform 4 is lowered to the desired level.
  • the hanger device 36 is brought to engage with the riser joint at the upper end portion thereof and holds the riser joint fixed.
  • the pick-up mechanism 7 is disengaged from the riser joint and the equipment platform 4 is lifted to the correct height in order to pick up the second riser joint from the magazine by means of the pick-up mechanism 7.
  • the second riser joint is carried above and in the extension of the first riser joint.
  • the equipment platform 4 is lowered until the second riser joint meets the first riser joint and the two riser joints are connected.
  • the grip of the hanger device 36 on the first riser joint is released and the equipment platform 4 is lowered together with the riser until the hanger device 36 can grip the upper end portion of the second riser joint.
  • a branch pipe of a type known per se is placed on top of the upper end portion of the second riser joint by means of the manipulator arm or by lifting and lowering the equipment platform 4.
  • the branch pipe serves as a circulation port for a return fluid flow from the well.
  • a third riser joint is placed on top of the branch pipe in the same way as described for the first and second riser joints.
  • the equipment platform 4 lifts the.
  • BOP 34 which has been parked on the work platform 3, into place over the riser joint fitted last.
  • the injector 5 is moved aside and parked, so that it will not be in the way of downhole equipment or a downhole tool which is to be lowered into the riser.
  • the coiled tubing (not shown) is passed through the injector 5 in a way known per se and further reference will not be made to it here.
  • the manipulator arm is then run down to the deck and picks up the desired downhole equipment or downhole tool. Then the manipulator arm is run so high up that the downhole equipment or downhole tool may freely be turned in above the centre of the BOP 34 and then lowered into the riser. The downhole equipment or downhole tool is hung off on a so-called C- plate. Then the manipulator arm is disengaged from the down- hole equipment or downhole tool and returns to pick up the next piece of downhole equipment or downhole tool . The down- hole equipment or downhole tool is joined together by personnel present at the BOP 34.
  • the bottom-hole assembly When the downhole equipment and/or downhole tool have/has been assembled into a so-called down- hole assembly, known in the art as a bottom-hole assembly, the bottom-hole assembly is connected to the coiled tubing.
  • the injector 5 is moved above the BOP 34 and connected to the BOP with the hydraulic quick-release coupling 59.
  • the coiled- tubing arrangement is now ready for use. Connecting and disconnecting the lower portion of the riser to/from the Christmas tree is done in a known manner and is not described here.
  • the work platform 3 is provided with a hanger mechanism 36 in the form of a gripper claw of a type known per se (not shown) .
  • the point of use of the device 1 is made up of a movable bridge, not shown, provided with a bridge deck. Further, on its underside, the bridge is provided with two bridge pillars projecting downwards.
  • the downwards-projecting bridge pillars may be constituted by a metal structure.
  • the bridge pillars are provided with means arranged to skid on a first skid frame on a rig-skidding deck.
  • the longitudinal direction of the bridge is perpendicular to the skid frame on the rig-skidding deck.
  • the bridge deck is provided with a second skid frame extending in the longitudinal direction of the bridge.
  • the device 1 is provided with means (not shown) arranged to skid on the second skid frame.
  • the device 1 By moving the device 1 along the second skid frame of the bridge and by skidding the bridge along the first skid frame of the rig- skidding deck, the device 1 can be carried to a selected position on the rig-skidding deck. Between the second skid frame the bridge deck is provided with hatches where the riser can be moved down from the device 1 to and through hatch openings in the rig-skidding deck and down to the
  • the device 1 is used to assemble a riser as earlier described above a first Christmas tree on the cellar deck. After the work has been carried out in the first well, the bottom-hole assembly is removed from the riser, if necessary. The lower end of the riser is disengaged from the Christmas tree.
  • the hanger device 36 of the work platform 3 holds the riser fixed. By lifting the work platform 3, the lower end of the riser is hoisted from the cellar deck, and this in such a way that the lower end of the riser projects above the rig- skidding deck when the work platform 3 has been moved upwards to an upper portion of the tower 2.
  • the device 1 can be moved into a position above another well by skidding the tower 2 along the skid frame of the bridge and by skidding the bridge along the skid frame of the rig- skidding deck without the riser having to be separated.
  • the riser is lowered by lowering the work platform 3 until the lower end of the riser can be connected to a second Christmas tree on the cellar deck.
  • the equipment platform 4 is moved in such a way that it will not get in the way of the work platform 3. In this embodiment, considerable time is saved when there is work to be carried out in several wells.
  • the riser is not disengaged from the hydraulic quick-release coupling 59. After the lower end of the riser has been disengaged from the Christmas tree and the riser has possibly been disengaged from the hanger device 36 of the work platform, the riser can be lifted and lowered by means of the equipment platform 4. In this embodiment too, considerable time is saved when there is work to be carried out in several wells.
  • lifting and lowering the riser can be carried out by the riser being held simultaneously by the hanger device 36 of the work platform 3 and by the hydraulic quick-release coupling 59, and by the work platform 3 and the equipment platform 4 cooperating by being lifted or lowered at the same speed.
  • This has the further advantage of the riser being held fixed by two independent mechanisms, which increases the safety of the operation.

Abstract

L'invention porte sur un dispositif (1) pour des opérations de puits, lequel dispositif comprend une tour (2) ayant un extérieur (22) et un intérieur (25), la tour (2) comportant, sur son extérieur (25), une plateforme de travail (3) mobile verticalement dans la position d'utilisation et une plateforme d'équipement verticalement mobile (4) qui est mobile indépendamment par rapport à la plateforme de travail (3), et la plateforme de travail (3) comporte un dispositif de suspension (36). L'invention porte également sur un procédé d'utilisation du dispositif (1).
PCT/NO2010/000427 2009-11-24 2010-11-23 Dispositif pour une tour pour opérations de puits et son utilisation WO2011065836A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/511,349 US20120318530A1 (en) 2009-11-24 2010-11-23 Device for a Tower for Well Operations and Use of Same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20093394 2009-11-24
NO20093394 2009-11-24

Publications (1)

Publication Number Publication Date
WO2011065836A1 true WO2011065836A1 (fr) 2011-06-03

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WO (1) WO2011065836A1 (fr)

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