EP3230553B1 - Spannringanordnung - Google Patents

Spannringanordnung Download PDF

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Publication number
EP3230553B1
EP3230553B1 EP15820625.0A EP15820625A EP3230553B1 EP 3230553 B1 EP3230553 B1 EP 3230553B1 EP 15820625 A EP15820625 A EP 15820625A EP 3230553 B1 EP3230553 B1 EP 3230553B1
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EP
European Patent Office
Prior art keywords
tension ring
pin
bore
collar
recess
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EP15820625.0A
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English (en)
French (fr)
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EP3230553A1 (de
Inventor
Charles YOUELL
Gregory Brown
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Claxton Engineering Services Ltd
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Claxton Engineering Services Ltd
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Publication of EP3230553A1 publication Critical patent/EP3230553A1/de
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Publication of EP3230553B1 publication Critical patent/EP3230553B1/de
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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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/12—Rope clamps ; Rod, casings or tube clamps not secured to elevators
    • 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
    • E21B19/02—Rod or cable suspensions
    • E21B19/04—Hooks
    • 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
    • E21B19/02—Rod or cable suspensions
    • E21B19/06—Elevators, i.e. rod- or tube-gripping devices
    • E21B19/07—Slip-type elevators

Definitions

  • This invention relates to a tension ring assembly adapted to be clamped around a pipe to enable the pipe to be gripped and to enable ancillary devices to be attached to the pipe, for example wires or chains, by which an upwards tension may be applied through the tension ring assembly to the pipe.
  • the tension ring assembly is particularly intended for mounting on a conductor riser pipe which is part of an offshore oil and gas production or exploration facility.
  • One particular application is for drilling conductors where ancillary devices, in particular lifting or tensioning lugs, have to be securely attached around the conductor before the conductor is lowered through the rotary table on an offshore rig.
  • Many known tension rings have a relatively large diameter, for example 1500 mm, and cannot pass through the opening in the table with the result that the ring has to be mounted on the pipe below the table.
  • the two outer collar segments are semicircular and are initially secured together by securing bolts that extend horizontally in a substantially circumferential direction. Each bolt passes through aligned clearance holes in opposite end portions of the two collar segments and is then secured by nuts that are tightened until end faces of the collar segments are pressed together.
  • the inner slip segments are initially retained in an upwards retracted position.
  • the slip collar and slip segments have lifting shackles temporarily screwed into an upper face of the collar segments for the purposes of handling and positioning the collar segments during installation.
  • the slip segments are released, such that they slip downwards on a ramp until they are wedged between the collar segments and the outer surface of the pipe.
  • Each of the slip segments may have an inner surface of steel with a series of parallel ridges and grooves, or may have an inner granular particle gripping surface, as disclosed in patent document WO/2015/173572 A2 .
  • Each of the slip segments has a radially outer face that has an inclined surface which is at 20° to the central axis of the tension ring.
  • Each of the collar halves has a corresponding inner face with an inclined surface at the same angle. This means that as the slip segments are pulled down inside the collar segments as the outer collar is tensioned upwards by wire rope or chains, the ridged surfaces of the slip segments are driven into secure gripping contact with the outer wall surface of the pipe. This arrangement therefore ensures that as upwards tension is increased, the inner tension sleeve grips the outer wall surface of the pipe ever more tightly.
  • the securing bolts holding the collar segments together have ends where bolt heads and nuts are partially recessed in the outer cylindrical profile of the collar segments, instead of being connected through opposed flanges that extend outwardly from the ends of each collar segment.
  • the lifting lugs are positioned at ⁇ 45o around the circumference either side of each of the two joins between the collar segments. The proximity of the securing bolt heads and nuts with the lifting lugs means that the lifting lugs must first be removed in order to provide access for a hydraulic reaction tool to engage with the head and nut at the opposite ends of each securing bolt.
  • each lifting lug has an outer diameter of about 1200 mm and a height of about 550 mm.
  • Each lifting lug abuts one of the collar segments over substantially the full height of each collar segment to which it is joined by four connection bolts having a diameter of about 50 mm.
  • Each connection bolt is tightened up to near its torque limit of about 100 kNm. It is difficult to undo such bolts on a conductor riser pipe, which may be moving, particularly as tools for undoing such bolts have to be secured to the pipe in order to provide the required torque.
  • a tension ring assembly for securing around a pipe, the assembly comprising a tension ring, at least one lifting lug removably secured to the tension ring so that the tension ring, and a pipe around which the tension ring has been secured, can be upwardly tensioned, the tension ring comprising:
  • the tension ring of the invention will normally be used to engage with vertically positioned pipes and, as a result, the plane of the tension ring will in use be generally horizontal. References in this specification to top and bottom, up and down, horizontal and vertical are to be read accordingly, but are not to be taken as limiting the scope of the invention.
  • the assembled ring is substantially cylindrical with a corresponding outer circumference, and the, or each, inserted pin lies within this outer circumference.
  • the means for tensioning adjacent collar segments against one another may comprise at least one screw fixing or bolt and nut fixing, which, when tightened, will pull adjacent collar segments together.
  • the assembled collar has two collar segments, each in the form of an annular arc extending over a semi-circle.
  • the tension ring may also have a retaining plate associated with each collar segment, and means may be provided in the retaining plates to support the slip segments in their uppermost position when initially locating the tension ring around a pipe. The supporting means can then be operated to release the segments.
  • the means for tensioning adjacent collar segments against one another to secure the tension ring around the pipe may be used to provide an initial tension of the collar segments prior to full tensioning of the collar segments so that slip segments are held in direct contact with the pipe surface prior to removably mounting the (or each) lifting lug to the tension ring.
  • the means for tensioning the collar segments may comprise at least one bolt that pull adjacent collar segments together.
  • the lifting lug may have a main body and a recess in the main body from which the tongue extends. The tongue may then be secured to the main body in this recess.
  • each, lifting lug may be for the, or each, lifting lug a pair of securing pins and two corresponding protruding portions.
  • the tongue then has having two corresponding keyways.
  • the two protruding portions may be on opposite inner sides of the recess, in which case, the keyways are also on opposite outer sides of the tongue.
  • the recess may have a substantially square or rectangular cross-section in a plane perpendicular to an insertion direction of the tongue in the recess.
  • the pin is preferably cylindrical, in which case, the protruding portion may be substantially half-cylindrical.
  • the keyway has an inverse shape to that of the protruding portion.
  • the main body of the lifting lug may have a flat inner surface and the tension ring may also have a flat mounting surface against which this flat inner surface abuts, preferably in flush contact, when the main body is positioned on the tension ring.
  • the collar segments may have substantially circumferentially extending channels in an outer surface of the collar segments.
  • the channels preferably have a straight axis that is parallel with a tangent to the tension at a join between adjacent segments held together by the (or each) connection member.
  • the (or each) collar segment connection member is substantially recessed in these channels.
  • the collar segments may have a substantially cylindrical outer surface.
  • the bore of the pin extends fully through the collar segment and the pin, when fully seated in the bore, has one end with a head that limits the insertion of the pin, and an opposite end that protrudes from the bore.
  • Such a head preferably has a threaded hole for receiving a threaded member for pulling the pin out of the bore when the lifting lug is to be removed from the tension ring.
  • a tension ring assembly around a pipe, the assembly comprising a tension ring and at least one lifting lug by which the tension ring and a pipe, around which the tension ring has been secured, can be lifted or upwardly tensioned, the method comprising:
  • the method may include, after passing the secured tension ring and pipe through the hole, the step of applying additional tension between adjacent collar segments to further secure the tension ring around the pipe.
  • Figure 1 shows in phantom outline a conductor pipe 10, used for example for an oil or gas production installation, which has a cylindrical outer surface 11 that is surrounded by a tension ring indicated generally at 12 to which are joined four lugs 30 for applying an upwards attention to form a tension ring assembly 1.
  • a tension ring assembly 1
  • lifting lugs such upward tensioning lugs are referred to as "lifting lugs”.
  • Figures 2 to 5 show the stages of assembling the tension ring assembly to the outer surface 11 of the conductor pipe 10 where the conductor passes through an aperture 4 in rotary table 6 (the table is shown only schematically).
  • the tension ring 12 comprises a collar 8 made up of two arc-shaped halves 7, 9, each of which extends substantially around a half circle and which, when assembled into a full collar, also referred to as a "ring assembly", define an axis 2 of the tension ring 12.
  • Each collar half 7, 9 has a corresponding collar segment 14, 16 and inside each segment is provided a plurality of wedge-shaped slip segments 20.
  • the slip segments are held inside the ring assembly and provide an inner cylindrical gripping face 21 of the tension ring 12.
  • the gripping faces are provided by grit-face segments 22 affixed to a main body 23 of each slip segment 20.
  • Such grit face segments are described in more detail in WO/2015/173572 A2 . It would however, alternatively be possible for the gripping faces to be provided by a ribbed steel surface of each slip segment, as described in EP 2143873 A1 .
  • the particular type of gripping faces to be used is not a central aspect of this invention.
  • the collar segments 14, 16 and the slip segments 20 when assembled present to each other inclined contacting surfaces 24, 25, such that an inner diameter across the assembled ring, between the inner faces 21 of the slip segments 20, varies as the slip segments move in a substantially axial direction up and down inside the assembled collar segments.
  • the inclined contacting surfaces 24, 25 have a saw-tooth profile.
  • An advantage of the saw-tooth profile as opposed to a continuous inclined ramp, such as that disclosed in EP 2143873 A1 is that this allows for a reduction in the radial thickness of the tension ring 12. It will be seen that as the slip segments 20 drop down inside the collar segments 14, 16 under gravity, the presence of the inclined surfaces 24, 25 means that the grit-face segments 22 of the slip segments 20 come into gripping contact with the outer wall surface 11 of the pipe 10.
  • the tension ring 12 has a substantially cylindrical outer surface 26. Between the outer surface 26 and inner gripping face 21 the tension ring 12 has substantially planar opposite upper and lower ends 28, 29.
  • An arc-shaped upper retainer plate 18 is fitted on each of the collar halves 14, 16 at the upper end 28 of the tension ring 12, and an arc-shaped lower retainer plate 19 is fitted on each of the collar halves 14, 16 at the lower end 29 of the tension ring 12. Together, the retainer plates 18, 19 constrain the axial movement of the wedge slip segments 20.
  • top retainer plates 18 is omitted from Figure 1 to show threaded bores 32 in a top surface 33 of one of the collar segments 16.
  • the slip segments 20 are held in an uppermost position by retention bolts 31 each of which extends axially to engage in one of the threaded bores 32 in the top surface 33 of the slip segment. Only when the retention bolts 31 are loosened are the slip segments 20 free to drop under their own weight.
  • Each of the retention bolts passes through a radially elongate clearance bore (not shown) in the top retainer plate 18 and has a nut 35 in contact with the upper retainer plate 18. When the nut 35 is turned by hand, with the bolt securely screwed into the bore 32 in the slip segment 20 so as not to rotate, the bolt is loosened allowing the slip segment 20 to drop in a controlled manner.
  • the tension ring 12 is first assembled to the conductor pipe 11 above the rotary table 6, and then the lifting lugs 30 are assembled to the tension ring below the rotary table to form the tension ring assembly 1.
  • the collar segments 14, 16 are secured to one another in a first stage by first positioning each collar half 7, 9 on opposite sides of the conductor pipe 10.
  • To facilitate handling of each collar half the upper end 28 of each half is provided with eyes 34 to which rope or chain from lifting gear (not illustrated) may be connected.
  • the initial alignment of the collar segments 14, 16 with respect to each other is set by the engagement of a pair of dowels 41 in each circumferential end face 42 of one of the collar segments 16 that insert into a pair of bores 43 in each circumferential end face 44 of the other collar segment 14.
  • the bolts and nuts therefore provide means for tensioning adjacent collar segments against one another to secure the tensioning ring around the pipe.
  • the diameter of the tension ring 12 in this example is 1167 mm.
  • the securing bolts 36 may protrude radially by a small amount, for example by about an additional 23 mm as illustrated. However, the bolts may alternatively be fully recessed.
  • the hole 4 in a rotary table typically has a diameter of about 1200 mm, and so the tension ring may therefore be lowered downwards through the hole 4 in the rotary table. After connection of the lugs 30, the diameter of the tension ring assembly is 1665 mm.
  • the tension ring 12 is lowered together with the conductor pipe 10, and so the tension ring is first tensioned loosely against the pipe. It would, however, alternatively be possible to lower the just tension ring through the hole and then tension the two collar halves 7, 9 against the pipe, rather than lowering the pipe and tension ring together.
  • the axial retention bolts 31 are loosened, as described above, so that the slip segments 20 drop under gravity in an axial direction and move radially inwards into contact with the pipe surface 11.
  • the connecting bolts 36 and nuts 38 are then tightened to provide an initial frictional grip between the collar halves 14, 16 and the outer surface 11 of the pipe 10.
  • the tension ring assembly 1 is designed for connection to a conductor pipe 10 having a nominal diameter of 30 inches ⁇ 1 % (762 ⁇ 6 mm).
  • the collar segments are therefore adjustable over a diameter range of 15 mm, and this equates to an axial adjustment range 90 of 40 mm.
  • a gap 45 remains between the opposed circumferential end faces 42, 44 of the collar segments 16, 14, so that all the tension maintained by the connecting bolts 36 and nuts 38 is transmitted to the pipe outer wall 11.
  • the nominal width of this gap is 14 mm, which is sufficient to accommodate the expected variation in conductor pipe diameter.
  • the lifting lugs 30 are fitted, as will be described in more detail below, to form the tension ring assembly 1, and in this assembled configuration, the weight of the conductor pipe 10 can be taken by attaching suitable lifting equipment to the lifting lugs 30, for example by shackles 39 bolted to the lugs. It will then be noted that when the weight of the pipe is taken through the lifting lugs, the engagement between the segments and the pipe wall will tend to drive the slip segments down the inclined faces 25 of each collar half 14, 16 to increase the grip of the slip segments 20 on the pipe wall 11. In this way an installed conductor pipe can be upwardly tensioned.
  • Each collar segment has on its radially outer surface 26 a machined flat 51 in which is provided two recesses 52.
  • Each recess is symmetrical about a central plane 53 through the corresponding lug 30 that extends radially inwards from the outer surface to intersect with the collar axis 2.
  • This central plane 53 is the plane of Figure 11 .
  • Each recess 52 is substantially rectangular in cross-section in a plane perpendicular to the central plane 53 such that the recess has a pair of inwardly opposite side walls 55 that are parallel with the central plane.
  • Each lifting lug has a pair of tongues 56 with a similar rectangular cross-section to that of the recesses 52 including a pair of outwardly opposite side walls 54, such that the tongues make a close sliding fit with the corresponding recesses when the tongues slot into the recesses.
  • a flat inner surface 61 of the lug 30 abuts flush against the flat 51 on the radially outer surface 26 of the collar segment 14, 16. The lifting lug 30 is therefore securely seated against the outer substantially cylindrical surface 26 of the collar segment.
  • Each collar segment 14, 16 has for each lifting lug 30 a pair of axially extending bores 57 each of which has a bore axis 58 that is aligned with the plane of one of the opposite side walls 55 of the recesses.
  • a pair of connection pins 59 is inserted in an axial direction 60 into the bores when one of the lifting lugs is to be connected.
  • the bore 57 partially intersects the recesses 52 such that in cross-section a portion of the bore extends laterally into each recess and another portion of the bore in cross-section extends laterally into collar segment.
  • the bore 57 is bisected where this intersects the recess, so that half the bore in cross-section is in the recess and the other half of the bore in cross-section is in the collar segment. So that the bore 57 for each pin 59 is continuous, each tongue therefore has a half-cylindrical bore surface 62 machined into each of the opposite side walls 54, which are substantially flat, apart from corner chamfers.
  • the half-cylindrical bore surfaces 62 align with similar half-cylindrical bore surfaces 63 in the flat side walls 55 of the recess 52 within the collar segment.
  • the tongue 56 therefore has a part-cylindrical recess which forms a portion of the bore 57 for the pin 59.
  • each pin 59 has a portion 64 in cross-section which protrudes into each recess 52 where the bore partially intersects the recess, as illustrated by the dashed outline 64 in the cross-section of Figure 12 .
  • Each tongue 56 is therefore located and held in place when the protruding portion 64 of the axially inserted pin seats in the half-cylindrical bore surface of the tongue, which therefore provides a keyway 62 that engages with the protruding portion 64 of the inserted pin 59.
  • the tongue therefore has a pair of keyways in a pair of outwardly opposite side surfaces of each tongue.
  • the shape of the keyway need not be hemi-cylindrical and will depend on the shape of the pin and the way in which the bore partially intersects with the recess.
  • the keyway may therefore be any type of groove, channel, or other type of recessed feature, preferably elongate in the axial direction relative to its width or dimension in a lateral direction, and which has an opening along its axial dimension where the bore partially intersects the recess.
  • the keyway therefore extends axially to align with the bore where the bore partially intersects the recess, whereby the protruding portion of the inserted pin is a portion in cross-section of the pin.
  • This arrangement allows the pins and surfaces that engage with the pins, to lie entirely within the outer circumference of the tension ring, and as a result the radius of the tension ring can be kept sufficiently small that the tension ring during initial assembly or final removal can be pass through apertures which could block passage of a tension ring in which the lifting lugs were connected using known means.
  • each lug can be reduced as compared with arrangements in which the lug must locate with top and bottom surfaces of the tension ring.
  • each keyway 62 comes into alignment with the bore 57 when the tongue 56 is slotted into its recess 52 so that said when the pin 59 is inserted into its bore 57, the protruding portion 64 of the inserted pin engages with the keyway 62 to secure the lifting lug 30 into position.
  • the pins 59 each have a head 65, which ensures that each pin is inserted to a defined depth in the bore 57, which extends fully through the collar segment 14, 16 to the lower end 29 of the tension ring 12.
  • An end 66 of each pin protrudes from its bore at the lower end 29 of the tension ring.
  • Each pin end 66 has a through-hole 67 into which is inserted a retaining clip, such as an R-clip 68.
  • Each lifting lug 30 is also provided with clips 69, and after installation all clips are preferably connected by wires (not shown) to ensure that none of the pins comes loose.
  • Each lifting lug 30 has a main body 70 having a pair of substantially rectangular cross-section bores 71, 72 from which the tongues 56 extend.
  • the lug main body 70 and two tongues 56 have aligned clearance holes for a pair of bolts 73 which pass through the main body and tongues to be secured by nuts 74.
  • the end of each bolt has a through hole 77 and/or an annular groove 75 for an R-clip 76, which is also preferably wired to the other retaining clips 68, 69 by wires (not shown) to ensure that none of the bolts 73 and nuts 74 securing the tongues 56 to the lug main body 70 come loose.
  • the arrangement described above for connecting lifting lugs to collar segments is particularly convenient when the time comes to remove the tension ring assembly 1 from the conductor pipe 10. This may be necessary, for example, if different lifting gear is to be used to lift the conductor pipe 10, or if the tension ring assembly 1 is to be permanently removed from the conductor pipe 10.
  • the main connection bolts 36 and nuts 38 are not positioned prominently on any outwardly protruding connection flanges, but are instead situated inside recessed channels 80 in the otherwise substantially cylindrical outer surface 26 of the tension ring 12.
  • the lifting lugs 30 may be removed from the tension ring 12 by withdrawing the pins 59, which may be hammered upwards from their protruding ends 66 allowing the head of the bolt 65 to be gripped and pulled upwards.
  • each pin 59 also has a threaded recess 78 in the head 65 into which a bolt or eye (not shown) may be screwed to provide a grip for pulling the pin out of its bore 57.
  • the pin protruding portions 64 then disengage from the keyways 62 in the lug tongues 56 which frees the lifting lug 30 for removal from the collar segment 14, 16.
  • the invention therefore avoids having to use hydraulic equipment to undo bolts connecting lifting lugs to a collar, which can present problems owing to the need to provide a support for reaction against the toque generated by such equipment.
  • the invention therefore provides a convenient apparatus and method for securing a tension ring assembly around a pipe in which the tension ring assembly has a radially compact collar to which at least one lifting or tensioning lug may be removably connected.

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  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
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Claims (14)

  1. Spannringanordnung (1) zum Befestigen um ein Rohr (10) herum, wobei die Anordnung einen Spannring (12) umfasst, wobei wenigstens eine Huböse (30) entfernbar am Spannring befestigt ist, sodass der Spannring und ein Rohr (10), um welches herum der Spannring befestigt wurde, nach oben gezogen werden können, wobei der Spannring (12) folgendes umfasst:
    - eine Mehrzahl Kragensegmente (14, 16), die dazu ausgebildet sind, in einem Ring angeordnet zu werden, wobei der angeordnete Ring aus Kragensegmenten sich um eine Ringachse (2) herum erstreckt und in einer in Radialrichtung außen liegenden Fläche (26) des angeordneten Rings wenigstens eine Aussparung (52) aufweist, an welcher die Huböse (30) befestigt ist;
    - wenigstens ein Kragensegment-Verbindungselement (36, 38) zum miteinander Verbinden der Kragensegmente, um den angeordneten Ring auszubilden, wenn die Kragensegmente um das Rohr (10) herum angeordnet werden; und
    - eine Mehrzahl Gleitsegmente (20), die dazu ausgelegt sind, zwischen den Kragensegmenten (14, 16) und dem Rohr (10) eingepasst zu werden, wobei die Gleitsegmente in Radialrichtung innenliegende Flächen (21) zur Herstellung eines direkten Kontaktes mit einer Außenfläche (11) des Rohrs aufweisen, wobei die Kragensegmente und die Gleitsegmente im angeordneten Zustand geneigte Kontaktflächen (24, 25) derart aufweisen, dass ein Innendurchmesser über den angeordneten Ring (12) zwischen den Innenflächen der Gleitsegmente variiert, während sich die Gleitsegmente innerhalb der angeordneten Kragensegmente in einer im Wesentlichen axialen Richtung nach oben und nach unten bewegen;
    dadurch gekennzeichnet,
    dass die Spannringanordnung weiter wenigstens einen Sicherungsstift zum entfernbaren Befestigen der Huböse am Spannring umfasst, und dass das Kragensegment für die Aussparung wenigstens eine Bohrung (57) aufweist, in welche ein entsprechender Sicherungsstift (59) im Gebrauchszustand entfernbar eingeschoben werden kann, wobei die Bohrung die Aussparung derart kreuzt, dass ein Teil (64) des eingeschobenen Stiftes in die Aussparung hinein reicht, und dass die Huböse (30) folgendes umfasst:
    - einen Grundkörper (70) und wenigstens eine Zunge (56), wobei die Zunge sich vom Grundkörper weg erstreckt und so ausgelegt ist, dass sie sich in einer im Wesentlichen radialen Richtung in die Aussparung (52) einführen lässt, um den Grundkörper auf der in Radialrichtung äußeren Fläche (26) zu positionieren, wobei die Zunge eine Längsnut (62) zum Zusammenwirken mit dem vorspringenden Teil (64) des eingeschobenen Stiftes aufweist, wobei die Konfiguration der Zunge (56), der Aussparung (52) und der Bohrung (57) derart gehalten ist, dass die Längsnut mit der Bohrung fluchtet, wenn die Zunge in die Aussparung eingeschoben wird, sodass, wenn der Stift in die Bohrung eingeschoben wird, der vorstehende Teil des eingeschobenen Stiftes in die Längsnut eingreift, um die Huböse (30) in ihrer Position zu sichern, und dass, wenn der Stift aus der Bohrung entfernt wird, der vorstehende Teil des eingeschobenen Stiftes außer Eingriff mit der Längsnut bewegt wird, um die Huböse zu ihrer Entfernung von dem Kragensegment (14, 16) zu lösen;
    - wobei die Bohrung eine sich in axialer Richtung erstreckende Bohrung (57) ist, die teilweise die Aussparung (52) kreuzt und die Längsnut (62) sich in axialer Richtung erstreckt, um mit der Bohrung dort zu fluchten, wo die Bohrung teilweise die Aussparung (52) kreuzt, wodurch der vorstehende Teil (64) des eingeschobenen Stiftes (59) ein Teil im Querschnitt des Stiftes ist.
  2. Spannringanordnung (1) nach Anspruch 1,
    bei welcher die Huböse (30) einen Grundkörper (70) und eine Aussparung (71, 72) im Grundkörper umfasst, von welcher aus sich die Zunge (56) erstreckt, wobei die Zunge in der Aussparung am Grundkörper fixiert ist.
  3. Spannringanordnung (1) nach Anspruch 1 oder Anspruch 2,
    bei welcher es für die Huböse (30) ein Paar Sicherungsstifte (59) und zwei entsprechende teilweise vorstehende Abschnitte (64) des eingeschobenen Stiftes gibt, wobei die Zunge (56) zwei entsprechende Längsnuten (62) für die beiden teilweise vorspringenden Abschnitte aufweist.
  4. Spannringanordnung (1) nach Anspruch 3,
    bei welcher die beiden vorspringenden Abschnitte (64) des eingeschobenen Stiftes (59) sich auf gegenüberliegenden Innenseiten (55) der Aussparung und die beiden Längsnuten (62) sich an gegenüberliegenden Außenseiten (54) der Zunge (56) befinden.
  5. Spannringanordnung (1) nach einem der vorigen Ansprüche,
    bei welcher die Aussparung (56) einen im Wesentlichen quadratischen oder rechteckigen Querschnitt in einer Ebene senkrecht zu einer Einschubrichtung der Zunge (56) in die Aussparung aufweist.
  6. Spannringanordnung (1) nach einem der vorigen Ansprüche,
    bei welcher der Stift (59) zylindrisch ist und der vorspringende Abschnitt (64) des eingeschobenen Stiftes im Wesentlichen halbzylindrisch ist.
  7. Spannringanordnung (1) nach einem der vorigen Ansprüche,
    bei welcher die Längsnut (62) eine Form aufweist, die komplementär zu dem vorspringenden Abschnitt (64) des Stiftes (59) ist.
  8. Spannringanordnung (1) nach einem der vorigen Ansprüche,
    bei welcher der Grundkörper (70) der Huböse (30) eine flache Innenfläche (61) aufweist und der angeordnete Ring eine flache Montagefläche (51) aufweist, gegen welche die flache Innenfläche anliegt, wenn der Grundkörper auf dem angeordneten Ring (12) positioniert wird.
  9. Spannringanordnung (1) nach einem der vorigen Ansprüche,
    bei welcher die Kragensegmente (14, 16) sich im Wesentlichen in Umfangsrichtung erstreckende Kanäle (80) in einer ihrer Außenflächen (26) aufweisen, wobei das Kragensegment-Verbindungselement (36, 38) in den Kanälen im Wesentlichen zurückspringend angeordnet ist.
  10. Spannringanordnung (1) nach einem der vorigen Ansprüche,
    bei welcher die Kragensegmente (14, 16) eine im Wesentlichen zylindrische Außenfläche (26) aufweisen.
  11. Spannringanordnung (1) nach einem der vorigen Ansprüche,
    bei welcher sich die Bohrung (57) vollständig durch das Kragensegment (14, 16) hindurch erstreckt, und wobei der Stift (59), wenn er vollständig in der Bohrung (57) sitzt, ein Ende mit einem Kopf (65), welcher das Einschieben des Stiftes begrenzt, sowie ein gegenüberliegendes Ende (66) aufweist, welches aus der Bohrung heraussteht.
  12. Spannringanordnung (1) nach einem der vorigen Ansprüche,
    bei welcher der Stift (59), wenn er vollständig in der Bohrung (57) eingesetzt ist, ein Ende mit einem Kopf (65) aufweist, welcher das Einschieben des Stiftes begrenzt, wobei der Kopf ein Gewindeloch (78) zur Aufnahme eines Gewindeelements zum Herausziehen des Stiftes aus der Bohrung aufweist.
  13. Spannringanordnung (1) nach einem der vorigen Ansprüche,
    bei welcher die geneigten Kontaktflächen (24, 25) eine Sägezahnkonfiguration aufweisen.
  14. Verfahren zum Befestigen einer Spannringanordnung (1) um ein Rohr (10) herum, wobei die Anordnung einen Spannring (12) und wenigstens eine Huböse (30) umfasst, durch welche der Spannring und ein Rohr, um welches der Spannring herum befestigt ist, angehoben oder nach oben gezogen werden können, wobei das Verfahren folgendes umfasst:
    - Anordnen des Spannrings (12), indem eine Mehrzahl Kragensegmente (14, 16) miteinander in einen angeordneten Ring aus Kragensegmenten um das Rohr (10) herum verbunden wird, und in dem für jedes Kragensegment eine Mehrzahl Gleitsegmente (20) bereitgestellt wird, welche zwischen den Kragensegmenten und dem Rohr zur Herstellung eines direkten Kontaktes mit der Rohroberfläche (11) angeordnet sind, wobei die Kragensegmente (14, 16) und die Gleitsegmente im angeordneten Zustand geneigte Kontaktflächen derart aufweisen, dass ein Innendurchmesser über den Spannring zwischen den Innenflächen (21) der Gleitsegmente variiert, während die Gleitsegmente sich innerhalb der angeordneten Kragensegmente nach oben und unten bewegen;
    - gegenseitiges Verspannen nebeneinanderliegender Kragensegmente, um den Spannring um das Rohr herum zu befestigen;
    - Bereitstellen einer von der Spannringanordnung (1) separaten Vorrichtung, wobei die Vorrichtung einen Körper (6) und im Körper ein Durchgangsloch (4) aufweist;
    - Hindurchführen des befestigten Spannrings durch das Loch und anschließendes lösbares Befestigen der wenigstens einen Huböse (30) am Spannring (12), um die Anordnung der Spannringanordnung (1) abzuschließen; wobei nach dem Befestigen der wenigstens einen Huböse (30) die Spannringanordnung (1) einen Außendurchmesser aufweist, der größer ist als der Durchmesser des Spannrings (12) vor der Befestigung mit der wenigstens einen Huböse am Spannring, und zwar derart, dass die befestigte Spannringanordnung und das Rohr (10) nicht in entgegengesetzter Richtung durch das Durchgangsloch (4) hindurch treten können,
    dadurch gekennzeichnet,
    dass das rückgängig zu machende Befestigen der wenigstens einen Huböse am Spannring folgendes umfasst:
    ein entlang einer im Wesentlichen radialen Richtung erfolgendes Einschieben von wenigstens einer Zunge (56) der Huböse (30) in eine entsprechende Aussparung in einer in Radialrichtung gelegenen Außenfläche (26) des Spannrings, um einen Grundkörper (70) der Huböse auf der in Radialrichtung gelegenen Außenfläche zu positionieren;
    Einschieben eine Stiftes (59) in eine sich in axialer Richtung erstreckende Bohrung (57) im Spannring (12), wobei die Bohrung teilweise die Aussparung kreuzt, sodass ein Teil (64) des Querschnitts des Stiftes in die Aussparung hineinreicht; und
    während der Stift (59) eingeschoben wird, wird der vorstehende Teil des eingeschobenen Stiftes mit einer Längsnut (62) in der Zunge in Eingriff gebracht, wobei die Konfiguration der Zunge (56), der Aussparung (52) und der Bohrung (57) derart ist, dass die Längsnut mit der Bohrung fluchtet, wenn die Zunge in die Aussparung eingeschoben wird, sodass wenn der Stift in die Bohrung eingeschoben wird, der vorspringende Teil des eingeschobenen Stiftes in die Längsnut eingreift, um die Öse in Position zu halten, und sodass, wenn der Stift aus der Bohrung (57) entfernt wird, der vorspringende Teil (64) des eingeschobenen Stiftes (59) außer Eingriff mit der Längsnut (62) gebracht wird, um die Öse (30) zum Entfernen des Kragensegments (14, 16) zu lösen.
EP15820625.0A 2014-12-12 2015-12-11 Spannringanordnung Active EP3230553B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB201422180 2014-12-12
PCT/IB2015/059554 WO2016092522A1 (en) 2014-12-12 2015-12-11 Tension ring assembly

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EP3230553A1 EP3230553A1 (de) 2017-10-18
EP3230553B1 true EP3230553B1 (de) 2018-10-24

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GB202003144D0 (en) * 2020-03-04 2020-04-15 Balmoral Comtec Ltd Subsea line clamp assembly
CN113669020B (zh) * 2021-08-04 2023-12-08 深圳宏业基岩土科技股份有限公司 钢套管快速上下对接方法

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US1721024A (en) * 1927-01-14 1929-07-16 Krell Elevator or spider
GB0812531D0 (en) * 2008-07-09 2008-08-13 Claxton Engineering Services L Tension ring

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WO2016092522A1 (en) 2016-06-16
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