EP3143238A2 - Ensemble de levage à anneau de tension - Google Patents

Ensemble de levage à anneau de tension

Info

Publication number
EP3143238A2
EP3143238A2 EP15728580.0A EP15728580A EP3143238A2 EP 3143238 A2 EP3143238 A2 EP 3143238A2 EP 15728580 A EP15728580 A EP 15728580A EP 3143238 A2 EP3143238 A2 EP 3143238A2
Authority
EP
European Patent Office
Prior art keywords
pipe
die insert
segments
slip
collar
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.)
Withdrawn
Application number
EP15728580.0A
Other languages
German (de)
English (en)
Inventor
Jason Paul MOYLES
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.)
Claxton Engineering Services Ltd
Original Assignee
Claxton Engineering Services Ltd
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 Claxton Engineering Services Ltd filed Critical Claxton Engineering Services Ltd
Publication of EP3143238A2 publication Critical patent/EP3143238A2/fr
Withdrawn legal-status Critical Current

Links

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
    • E21B19/002—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling
    • E21B19/004—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling supporting a riser from a drilling or production platform
    • 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 adapted to be clamped around a pipe to enable the pipe to be gripped and upwardly tensioned or lifted, for example using steel ropes.
  • the ring is particularly intended for mounting on a conductor or riser pipe which is part of an offshore oil and gas production or exploration facility.
  • Related Art Pipes such as conductors and risers often need to be upwardly tensioned, for example when drilling exploration wells, as the self-weight of the pipe and topside equipment can buckle the pipe. Upwardly applied tension can also used to tune the frequency response of the pipe system resulting from wave action which can reduce stresses in the pipe and thereby improve fatigue lifetime.
  • the collar halves each have a corresponding inner face having an inclined surface at the same angle so that as the slip segments are pulled down inside the collar segments as the outer collar is tensioned upwards, the ridged surfaces of the slip segments are driven radially inwards into secure gripping contact with the outer wall surface of the pipe.
  • the ridges are made from a hardened grade of steel and therefore bite into the outer wall surface of the pipe to form parallel, circumferentially extending grooves and ridges.
  • a problem has been noted that this can cause a weakness in the pipe owing to metal fatigue when the pipe is subjected to repeated loading and unloading.
  • the grooves and ridges in the pipe form stress concentrators and if the loads are above a certain threshold, microscopic cracks will begin to form in the surface of the pipe at these stress concentrators. Eventually a crack will reach a critical size, the crack will propagate suddenly, and the structure will fracture.
  • Triangular cross-section ridges and grooves will lead to elevated local stresses where fatigue cracks can initiate.
  • rounded or particularly shaped ridges and grooves can potentially reduce or prevent unnecessary deformation and consequent metal fatigue, for example as described in US 2009/0056930 A1 , such ridges provide less grip.
  • each groove and ridge impressed into the steel pipe are significant stress concentrators, particularly for the circumferentially endmost ridges, meaning that microscopic cracks will tend to propagate circumferentially away from the ends of each of these each grooves and ridges in both circumferential directions, i.e. along the length of the grooves and ridges and towards the grooves and ridges embossed into the pipe from the adjacent slip ring.
  • a tension ring lifting assembly for securing around a pipe and for applying an upwards tension to said pipe, the assembly comprising:
  • each slip segment having an arcuate inner face adapted to make direct contact with an outer surface of the pipe, the collar segments and the slip segments when assembled having inclined mutually contacting surfaces such that an inner diameter across said assembled ring, between the inner faces of the slip segments, varies as the slip segments move up and down inside said assembled collar segments;
  • each slip segment has a main body and a plurality of elongate vertically extending die inserts, each die insert being removably fitted to said main body and having on said inner face a granular particle gripping surface for gripping the outer surface of the pipe;
  • the main body has a plurality of vertically extending die insert channels and each die insert has a matching cross-section for said channels whereby each die insert is retained securely in a corresponding one of said channels, each die insert channel having an upper open end for receiving a corresponding die insert and a closed lower end for restraining downward movement of the die insert when the tension ring lifting assembly is used to apply an upwards tension to said pipe; and
  • each die insert channel has a back wall for providing radial support to the die segment, said back wall having at one or both ends a portion that is recessed radially outwards in order to provide a gap between the die insert and said back wall so that the die insert is not radially supported by said recessed portion.
  • the tension ring lifting assembly of the invention will normally be used to engage with vertically positioned pipes such as conductor pipes or riser pipes and as a result the plane of the ring will be normally be 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 being exact orientations and thereby limiting the scope of the invention.
  • the tension ring lifting assembly may be used either below water or above water, for example in the splash zone beneath a drilling or protection platform.
  • the granular particle gripping surface provides a random or non-regular array of contact points, of varying size, around the circumference of the pipe, and therefore avoids a concentration of stresses.
  • the pattern of contact points and corresponding embossing of the outer surface of the pipe is not oriented in any way, but the area spanned by the contact points is elongate and extends in a vertical, or axial direction, which is the direction in which vertical loads will be transferred from the pipe to the outer collar segments. This helps to maintain good load bearing capacity whilst minimising the tendency of fatigue induced micro-cracks to spread in a circumferential direction from the imprinted patterns forced into the outer surface of the pipe.
  • a tension ring lifting assembly for securing around a pipe and for applying an upwards tension to said pipe, the assembly comprising: a plurality of collar segments which can be assembled into a ring around the pipe and means for tensioning adjacent collar segments against one another to secure said ring around the pipe; and
  • each slip segment having an arcuate inner face adapted to make direct contact with an outer surface of the pipe, the collar segments and the slip segments when assembled having inclined mutually contacting surfaces such that an inner diameter across said assembled ring, between the inner faces of the slip segments, varies as the slip segments move up and down inside said assembled collar segments;
  • each slip segment has a main body and a plurality of elongate vertically extending die inserts, each die insert being removably fitted to said main body and having on said inner face a granular particle gripping surface for gripping the outer surface of the pipe;
  • the main body has a plurality of vertically extending die insert channels and each die insert has a matching cross-section for said channels, each channel having an upper open end for receiving a corresponding die insert and a closed lower end for restraining downward movement of the die insert when the tension ring lifting assembly is used to apply an upwards tension to said pipe;
  • the tension ring further comprises a retaining plate removably fixed to each collar segment and configured to limit upward movement of each slip segment, and means in the retaining plates to support the slip segments in their uppermost position when initially locating the ring around a pipe, said retaining plate also providing a radially inwards extending lip that has an overlap across the open end of each die insert channel to prevent each die insert from being removed from the corresponding die insert channel when retaining plate is fixed to each collar segment, said overlap being radially outwards of said arcuate inner face of each slip segment whereby said overlap does not interfere with said grip of the granular particle gripping surface to said outer surface of the pipe; and the retaining plate is removably fixed to each collar segment by means of a bolt which passes through an elongate radially extending slot in the retaining plate to engage with a threaded recess in a top face of each slip segment, whereby said bolt, when loosened permits radial movement of the slip segment whilst limiting movement of the slip segment downwards
  • each slip segment is preferably also arcuate.
  • both the inner and outer faces of each slip segment are concentric and coaxial with a longitudinal axis of the assembled collar segments.
  • the tension ring assembly may be provided with a connection feature by which the assembly may be pulled or pushed upwards in order to tension upwards the pipe secured within the ring, for example to reduce the downwards force of the pipe owing to its weight, or when the pipe is being lifted or lowered.
  • the connection feature may be one or more lifting lugs secured to one or more of the collar segments, or any other suitable connection feature, by which the tension ring may be pulled upwards, for example by a steel rope, or pushed upwards, for example by hydraulic rams, in order to tension or take weight from the pipe.
  • each slip segment has a plurality of vertically extending die insert channels.
  • Each die insert has a cross-section matching that of the die insert channel so that each die insert is retained securely in the channel.
  • Each channel has an upper open end for receiving a corresponding one of the die inserts and a closed lower end for restraining downward movement of the die insert when the tension ring lifting assembly is used to apply an upwards tension to the pipe.
  • Each of the die insert channels has a back wall for providing radial support to the die segment.
  • This back has, at one or both ends, a portion that is recessed radially outwards in order to provide a gap between the die insert and the back wall so that the die insert is not radially supported by the, or each, recessed portion.
  • embossing pressure is reduced at these points, thereby reducing the imprint of textured features into the pipe outer wall in these areas.
  • the back wall providing the radial support is a flat surface and the, or each, recessed portion is a radially inward facing concave surface, preferably a cylindrically curved surface.
  • each die insert channel is a dovetail slot and each die insert has a matching trapezoid cross-section for slotting into the dovetail slot when the die insert is inserted into the open end of the dovetail slot.
  • retentive matching profiles may, however, be used to retain the die insert in the slot, for example a T-profile, in which the step of the "T” extends to the radially inner surface of the slip segment main body and the arms of the "T” extend in opposite directions at right angle to a radius of the assembly.
  • each die insert channel and die insert restrain each die insert from moving radially inwards and coming out of the die insert channel before or after the assembly is secured to the pipe.
  • the tension ring further comprises a retaining plate removably fixed to each collar segment and configured to limit upward movement of each slip segment, and means in the retaining plates to support the slip segments in their uppermost position when initially locating the ring around a pipe.
  • the retaining plate also provides a radially inwards extending lip that has an overlap across the open end of each die insert channel to prevent each die insert from being removed from the corresponding die insert channel when the retaining plate is fixed to each collar segment.
  • the retaining plate may be removably fixed to each collar segment by means of a bolt which passes through an elongate radially extending slot in the retaining plate to engage with a threaded recess in a top face of each slip segment.
  • the bolt when loosened permits radial movement of the slip segment when the assembly is being fitted to or removed from the pipe while at the same time limiting movement of the slip segment downwards away from the retaining plate.
  • the slip segments are therefore held to the assembly at all times, both before assembly and connection around the pipe and after disassembly and removal from the pipe.
  • the width of this clear gap in a circumferential direction is preferably at least about 10% of the width of the granular particle gripping surface of one or both of the adjacent die inserts.
  • the width of the clear gap may be less than about 100% of the width of the granular particle gripping surface of one or both of the adjacent die inserts.
  • this clear gap is between 40% and 60% of the width of the granular particle gripping surface of one or both of the adjacent die inserts. In a preferred embodiment of the invention, this clear gap is about 50% of the width of the granular particle gripping surface of one or both of the adjacent die inserts.
  • the main body of the die insert may be a steel alloy and the granular particle gripping surface may be provided by abrasive particles embedded in a surface layer of the main body, the abrasive particles being harder than the steel alloy.
  • the inclined mutually contacting surfaces of the assembled slip segments and collar segments prior to securing of the assembly to the pipe, may be locked together by a removable bolt, pin or peg passing through the collar segment and into the main body of the slip segment. This bolt, pin or peg then prevents relative movement between the inclined mutually contacting surfaces until the bolt, pin or peg is removed from the main body of the slip segment.
  • the means for tensioning adjacent collar segments against one another may comprise at least one nut and bolt or screw fixing which when tightened pulls adjacent collar segments together.
  • the tension ring lifting assembly may comprise at least two collar segments which can be engaged with each other and any additional adjacent collar segments and tensioned against one another to secure the collar segments around the pipe.
  • the assembled collar has two collar segments, each having a main body in the form of a part-annular arc extending over a semi-circle.
  • the collar segments can have radially outwardly extended opposed flanges at their adjoining ends, with clearance holes to receive corresponding bolts, each bolt being secured by a nut, and which, when tightened draw the main bodies of the collar segments towards one another.
  • the tension ring may also have a retaining plate associated with each collar segment, and supporting 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 adapted to provide a pre-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 final tightening.
  • the means for pre-tensioning the collar segments may comprise at least one bolt that pulls adjacent collar segments together.
  • Figure 1 is a perspective view of a tension ring lifting assembly according to a preferred embodiment of the invention, having a segmented collar that surrounds a plurality of gripping slip segments, one of which is shown partially dissembled to show how a main body of each slip segment has channels or slots that hold vertically extending die inserts;
  • Figure 2 is a top view of the tension ring lifting assembly of Figure 1 , when secured around a pipe;
  • Figure 3 is a side view of the tension ring lifting assembly and pipe of Figure 2;
  • Figure 4 is a side view of one half of the tension ring lifting assembly, taken along line IV-IV of Figure 1 with all slip segments and die inserts in place;
  • Figure 5 shows a perspective view of the main body of one of the slip segments of Figure 1 ;
  • Figure 6 is a top view of the main body of the slip segment of Figure 5;
  • Figure 7 is a side view of the main body of the slip segment of Figure 5.
  • Figure 8 is a cross-section through one of the slip segments, showing a central vertical plane through the main body along the line VIII-VIII of Figure 7 and with a vertically extending die insert held by the main body.
  • Figures 1 to 3 show a tension ring lifting assembly 1 for securing around a pipe 10 and for applying an upwards tension to the pipe, for example when lifting or tensioning a pipe.
  • the pipe is a sub-sea conductor or riser pipe for an oil or gas well.
  • the pipe may contain other concentric pipes.
  • the tension ring lifting assembly 1 comprises a plurality of collar segments 14, 16 which are assembled into a ring around the pipe 10, and means for tensioning adjacent collar segments against one another to secure the ring around the pipe.
  • the means for tensioning the collar segments in this example are two pairs of flanges 1 1 which extend radially outwards from ends of a part-annular main body portion 7 of each collar segment 14, 16 and that have through holes 21 through which bolts 12 pass to be secured by nuts 13.
  • the assembly also comprises a plurality of slip segments 4 adapted to fit between the collar segments 14, 16 and the pipe 10, each slip segment having an arcuate inner face 5 adapted to make direct contact with a cylindrical outer surface 20 of the pipe.
  • the collar segments 14, 16 and the slip segments 4 when assembled have inclined mutually contacting surfaces 9, 19 such that an inner diameter across the assembled ring, between the inner faces 5 of the slip segments, varies as the slip segments move up and down inside the assembled collar segments.
  • each slip segment 4 has a main body 15 and a plurality of elongate vertically extending die inserts 17, each die insert being removably fitted to the main body and providing on the inner face 5 of the slip segment a granular particle gripping surface 22 for gripping the outer surface 20 of the pipe 10.
  • the gripping surface is preferably granular in the sense that there are discrete grains or particles in the textured surface. These grains may be blasted into the surface of a main body 25 of the die insert so that these are embedded in the material of the die insert main body, which is formed from steel.
  • the assembly 1 can be pulled or lifted by means of lugs 30.
  • the assembly can be pushed upwards from underneath, for example my means of rams acting upwards from a supporting table (not illustrated).
  • the two arc-shaped collar segments 14, 16 each extend substantially around a half circle.
  • An arc-shaped retainer plate 18 is fitted on each of the collar halves by means of bolts 24 that pass through holes 28 in the plates into threaded bores (not shown) in a top surface 26 of each collar segment 14, 16.
  • the collar halves 14, 16 are secured around the pipe 10 and to one another in a first stage by the bolts and nuts 12, 13.
  • the bolts 12 are inserted in a generally circumferential direction through the flange holes 21 to provide an initial connection between the collar halves 14, 16.
  • the bolts and nuts 12, 13 therefore provide one means for tensioning adjacent collar segments against one another to secure the tensioning ring assembly 1 around the pipe 10, however, these particular tensioning means are not central to the invention, and the skilled person will appreciate that other tensioning means may alternatively be used.
  • the collar halves 14, 16 also have a substantially half-cylindrical outer surface 27 from which extend retaining means such as bolts or pins 29 that are used to retain each one of the slip segments 4 prior to use.
  • retaining means such as bolts or pins 29 that are used to retain each one of the slip segments 4 prior to use.
  • these are pins 29 which pass through clearance holes 31 in the collar segments 14, 16 to engage with a smooth bore 33 in a radially outer side or face 8 of each slip segment 4.
  • the pins prevent the opposed inclined surfaces 9, 19 from sliding with respect to each other, and therefore retrain the slip segment from moving with respect to the collar portion prior to the assembly being secured to the pipe 10.
  • the bore 33 would be threaded.
  • each segment 4 is a textured surface 22, and the outer face 8 is smooth and provides the inclined surface 9.
  • the incline is at between 10° to 12° to an axis 35 of the tension ring assembly 1 .
  • the collar halves 14, 16 each have a corresponding inner face 36 having the inclined surface 19 and it will be seen that as the slip segments 4 drop down inside the collar segments the presence of the opposed, in-contact inclined surfaces 9, 19 means that the textured surfaces 22 of the slip segments 4 come into gripping contact with the outer wall surface 20 of the pipe 10.
  • the slip segments 4 are held in an uppermost position by a retention bolt 38 that extends axially to engage in a threaded bore 50 in a top surface 37 of the slip segment.
  • the retention bolt 38 passes through a radially elongate slot 52 in the plate 18.
  • the bolt 38 is partially loosened permitting some vertical movement of the slip segment, which can then also move radially inwards and outwards as the bolt 38 moves within the slot 52.
  • the first stage of assembly is to place the collar halves around the pipe 10 and then join these using the connecting bolts and nuts 12, 13.
  • the lifting lugs 30 may be removed from the tension ring assembly 1 . 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 lifting assembly 1 is to be removed from the conductor pipe 10.
  • the granular particle gripping surface 22 may be provided by refractory metal carbide particles that have been blasted against and embedded into an initially smooth metallic inner surface of the die insert 17.
  • the inner surface of the die insert is cylindrically curved to match the expected diameter of the pipe, and apart from surface roughness provided by the granular particles embedded in the metallic material of the die insert main body 25, is otherwise smooth, i.e. without grooves ridges or teeth.
  • the granular particle gripping surface 22 is characterised by surface roughness features ranging from 100 pm to 1 pm or less in scale.
  • each slip segment 4 has a plurality of vertically extending die insert channels or slots 41 and each die insert 17 has a matching cross-section.
  • Each slot has an upper open end 42 for receiving a corresponding die insert 17 and a closed lower end 43 for restraining downward movement of the die insert when the tension ring lifting assembly 1 is used to apply an upwards tension to the pipe 10.
  • Each die insert channel is preferably a dovetail slot 41 and each die insert 17 has a matching trapezoid cross-section for slotting into the dovetail slot when the die insert is inserted into the open end 42 of the slot.
  • Other longitudinally extending overhang features in the die insert channels may alternatively be used to retain the die inserts in a radial direction.
  • Each retaining plate 18 has a radially inwards extending lip 23 that overlaps the open end 42 of each die insert channel to prevent each die insert from being removed from the corresponding die insert channel when retaining plate is fixed to each collar segment 14, 16.
  • the lower end 43 of each die insert channel is closed by a part-annular ledge 44 that preferably extends the full circumferential extent of the main body 15 of the slip segment 4.
  • Each dovetail slot 41 has a base or back wall 45 that is machined flat.
  • the use of the part-annular ledge 44 avoids difficulties in machining tight corners at the bottom end 43 of each slot 41.
  • the ledge 44 is formed by turning the slip segment and so creates a concave back wall or surface 47 that is preferably cylindrically curved and concentric with the assembly axis 35.
  • This part-cylindrical surface is recessed radially outwards from the flat back wall 45 of the slot 41.
  • This provides a gap 46 between a lowermost or base portion 48 of the die insert 17 and the main body 15 of the slip segment 4. Apart from simplifying the manufacturing process, it has been found that this feature provides a benefit in reducing the potential for micro- crack propagation in the pipe 10 stemming from embossing of the outer surface 20 of the pipe.
  • slip segments 4 will tend to press into the pipe most strongly and deeply at the base portion 48 of each slip segment 4, where this is wedged closest to the outer collar segment, which is also thickest and therefore stiffest at this point. This effect can be exacerbated if the lowermost connection bolts and nuts 12, 13 are tightened more than the uppermost bolts and nuts. This can in some circumstances cause deeper impressions in the pipe outer surface 20 to be formed in the area of the base portion 48 of each die insert 17.
  • the gap 46 allows some flexing in the base portion 48 of each die insert away from the pipe outer surface 20, which reduces pressures and the depth of embossed features at this point, thereby potentially improving metal fatigue lifetime.
  • a similar gap 146 provided by a similar turned groove 147 in the main body of the slip segment, can be provided at the top end of each die insert, as indicated by dotted lines in Figures 7 and 8.
  • the gap 146 allows some flexing in an uppermost or top portion 148 of each die insert away from the pipe outer surface 20, which reduces pressures and the depth of embossed features at this point, thereby potentially improving metal fatigue lifetime.
  • the channels 41 do not extend all the way to top surface 37 of the slip segment, but end at the turned groove 147.
  • the various features of the invention therefore help to reduce damage to the outer surface of the conductor or riser pipe which could result in metal fatigue crack propagation owing to circumferentially aligned surface features that act as stress concentrators.
  • the invention therefore provides a convenient tension ring lifting assembly for securing around a substantially vertically extending pipe and for applying an upwards tension to the pipe, whilst reducing the potential of long term metal fatigue owing to any deformations impressed into the outer surface of the pipe by gripping surfaces of the assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Abstract

La présente invention concerne un ensemble de levage à anneau de tension (1) permettant d'appliquer une tension vers le haut à une conduite, ledit ensemble comprenant une pluralité de segments de collier (14, 16) qui sont assemblés dans un anneau autour de la conduite, et une pluralité de segments de glissement (4) conçus pour s'ajuster entre les segments de collier et la conduite. Les segments de collier (14, 16) sont maintenus ensemble par des moyens (11, 12, 13) permettant de tendre les segments de collier adjacents les uns contre les autres pour fixer l'anneau autour de la conduite. Les segments de glissement (4) présentent une face interne arquée (5) conçue pour entrer en contact direct avec une surface externe de la conduite. Les segments de collier et les segments de glissement lorsqu'ils sont assemblés présentent des surfaces mutuellement en contact inclinées (9, 19) de telle sorte qu'un diamètre interne à travers l'anneau assemblé, entre les faces internes (5) des segments de glissement (4), varie à mesure que les segments de glissement se déplacent vers le haut et vers le bas à l'intérieur des segments de collier assemblés (14, 16). Chaque segment de glissement présente un corps principal (15) et une pluralité d'éléments de matrice s'étendant de manière verticalement allongée (17), chaque élément de matrice étant fixé de manière amovible au corps principal et présentant sur la face radialement interne une surface de préhension à particules granuleuses (22) permettant de saisir la surface externe de la conduite. Le corps principal (15) présente une pluralité de conduits d'éléments de matrice s'étendant verticalement (41) qui maintiennent les segments de matrice, chaque conduit présentant une extrémité ouverte (42) qui est fermée par une plaque de retenue (18) fixée de manière amovible à chaque segment de collier (14, 16).
EP15728580.0A 2014-05-14 2015-05-14 Ensemble de levage à anneau de tension Withdrawn EP3143238A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1408597.1A GB201408597D0 (en) 2014-05-14 2014-05-14 Tension ring lifting assembly
PCT/GB2015/051418 WO2015173572A2 (fr) 2014-05-14 2015-05-14 Ensemble de levage à anneau de tension

Publications (1)

Publication Number Publication Date
EP3143238A2 true EP3143238A2 (fr) 2017-03-22

Family

ID=51032796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15728580.0A Withdrawn EP3143238A2 (fr) 2014-05-14 2015-05-14 Ensemble de levage à anneau de tension

Country Status (3)

Country Link
EP (1) EP3143238A2 (fr)
GB (1) GB201408597D0 (fr)
WO (1) WO2015173572A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB202003144D0 (en) * 2020-03-04 2020-04-15 Balmoral Comtec Ltd Subsea line clamp assembly
CN112776095A (zh) * 2021-01-06 2021-05-11 陆超林 一种便于收集木屑的木材加工用切割机
CN115822473B (zh) * 2022-12-09 2023-10-31 四川宏华电气有限责任公司 一种管柱吊卡结构

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7036397B2 (en) * 1996-09-13 2006-05-02 Bangert Daniel S Granular particle gripping surface
WO2003058103A2 (fr) * 2002-01-04 2003-07-17 Varco I/P, Inc. Structure de retenue de tuyau a bague de charge
US7992634B2 (en) * 2007-08-28 2011-08-09 Frank's Casing Crew And Rental Tools, Inc. Adjustable pipe guide for use with an elevator and/or a spider
GB0812531D0 (en) * 2008-07-09 2008-08-13 Claxton Engineering Services L Tension ring

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2015173572A3 *

Also Published As

Publication number Publication date
GB201408597D0 (en) 2014-06-25
WO2015173572A2 (fr) 2015-11-19
WO2015173572A9 (fr) 2016-02-11
WO2015173572A3 (fr) 2016-01-14

Similar Documents

Publication Publication Date Title
US9708868B2 (en) Slip device for suspending a drill or casing string
US8096540B2 (en) Tension ring lifting assembly
US11292032B2 (en) Lining arrangement, and a method for fastening lining elements to a support structure
EP3377797B1 (fr) Appareil de préhension et dispositifs pour le bouchage de tuyaux, d'orifices ou de raccordement
EP3143238A2 (fr) Ensemble de levage à anneau de tension
US6588981B2 (en) Pipe handling apparatus
US6264395B1 (en) Slips for drill pipe or other tubular goods
US9616559B2 (en) Methods for installing shoulder rings in threaded pipe couplings
US6551027B2 (en) Pipe handling apparatus and method of using the same
US20150203176A1 (en) Apparatus and method for exchanging a buoy bearing assembly
EP3230553B1 (fr) Ensemble collier de serrage
EP2885485B1 (fr) Coin de retenue
RU2470136C1 (ru) Стопорное устройство для скважинного оборудования, спускаемого на коллоне труб
US20100050407A1 (en) Method of Repairing Tong Jaw
JP7300376B2 (ja) リング装置およびリング装置を用いた管の移送方法
CN221075530U (zh) 一种用于导管架立管改造的机械式抱卡结构
AU2003276478B2 (en) Large diameter flush-joint pipe handling system
CN103635260B (zh) 振荡离心机安装布置
RU2256061C1 (ru) Устройство для выправления обсадной колонны
CN114835007A (zh) 一种用于加工气缸体斜油孔的缸孔吊具及使用方法
JPS6036993B2 (ja) 浚渫船のスパツド吊上げ用クランプ装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20161103

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20170701