GB2594990A

GB2594990A - Improvements in or relating to chain connection

Info

Publication number: GB2594990A
Application number: GB2007197.3A
Authority: GB
Inventors: Taylor Richard; Smith David
Original assignee: Flintstone Technology Ltd
Current assignee: Flintstone Technology Ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2021-11-17
Also published as: WO2021228965A1; GB202007197D0

Abstract

A chain connection link 2’, has a main body 4’ having a closed aperture or eye 6’ and a closably open aperture or hook 8’. The main body 4’ can be a single piece body; the aperture or hook 8’ having a mouth (10, fig 1a). The link can be used offshore/underwater/subsea e.g. mooring. The link 2’ has a T-shaped closing piece 12’ to close the mouth 10 secured with a lock arrangement 16’ and mating portions (32-46, fig 1a-2b). A deployment device (e.g. clamp 50, figs 13-29) can hold or transport a chain connection link 2’.

Description

IMPROVEMENTS IN OR RELATING TO CHAIN CONNECTION

FIELD OF INVENTION

This invention relates to an improved chain connection link such as, though not exclusively, a mooring chain connection link. The invention also relates to an associated apparatus, deployment device, system and methods.

BACKGROUND TO INVENTION

Chain connection links are known. US 2,999,352 (BALDT) discloses detachable chain joining link. The detachable chain link of this prior art comprises: a pair of oppositely disposed U-shaped end elements, each of said end elements being identical in size and shape to the other and so disposed with respect to the other that the leg portions of each are directed towards and in alignment with the leg portions of the other, a pair of substantially hour-glass shaped cap members, each of said cap members being of substantially identical shape and being provided on one face with a mating surface, means disposed at each end of each of said cap members on the mating surface thereof for releasably holding the leg portions of said end elements, means defining a pair of spaced recesses and a pair of similarly spaced projecting lugs on the mating surface of each of said cap members, said recesses and said lugs on one of said cap members being adapted to mate with the corresponding lugs and recesses, respectively, on the other of said cap members when both are in mating relationship, said mated pairs of said lugs and recesses lying substantially between respective aligned pairs of leg portions of said end elements, means defining a hole through said cap members when in mating relationship, said hole passing through the lugs on both of said cap members, and pin means removably disposed within said hole to releasably secure said cap members together.

Other prior art chain connection links are disclosed in the following: KR 101701284 (REXEL KOREA), US 2,398,897 (ST PIERRE), US 5,878,565 (GROOTVELD), US 6,272,837 (VINCINAY CADENAS), US 9,670,987 (CATERPILLAR) and WO 2011091810 (PEWAG AUSTRIA).

WO 2018/197883 (FLINTSTONE TECHNOLOGY) discloses a mooring apparatus for tensioning a mooring line, the apparatus comprising a mid-line tensioner. The apparatus comprises: a guide portion for guiding a portion of a first mooring line, an arrangement for connecting or coupling the apparatus to a second mooring line, and a lock or lock means, wherein the guide portion is movably connected to the arrangement, and the lock is connected to, attached to or provided on the arrangement.

The present Inventors have identified a need for an improved (mooring) chain connection fink. In particular, though not exclusively, a need has been identified for a chain connection link that can address one or more of the following requirements: * join two chains together subsea and not just on a deck of a vessel; * be operated by a remotely operated vehicle (ROV); * maintain overall dimensions of the joined chains so that the connecting link can pass round, over or through chain wheels, fairleads, tensioners, mid-line tensioners, or the like; and/or * are adapted to be used, beneficially underwater/subsea, with inter alia a mid-line tensioner, such as that disclosed in WO 2018/197883 (FLINTSTONE TECHNOLOGY).

It is an object of at least one embodiment of at least one aspect of the present invention to obviate or at least mitigate one or more problems and/or disadvantages in the prior art.

It is an object of at least one embodiment of at least one aspect of the present invention to provide a technically simple and/or commercially cost effective (mooring) apparatus and method than in the prior art.

SUMMARY OF INVENTION

FIRST INVENTION

According to a first aspect of the present invention there is provided a chain connection link, such as a mooring chain connection link. The chain connection link may comprise a main body. The chain connection link or main body may comprise a closed aperture or eye. The chain connection link may comprise a closably open aperture or hook The closably open aperture or hook may comprise a mouth.

The mooring chain connection link may be adapted for use offshore and/or underwater/subsea.

The closed aperture or eye and/or the closably open aperture or hook may be formed by, from or on the main body.

The chain connection link may comprise a closing piece or further body adapted to close, for example a periphery of, the closably open aperture or mouth of the hook.

A lock arrangement may be provided which may lock or secure the main body and further body together.

The main body may comprise an outer peripheral portion which may comprise at least part of the closed aperture and/or the closably open aperture or hook.

The main body may comprise first and second ends, for example, first and second curved ends. The main body may comprise first and second sides, for example, first and second at least part linear sides. The main body may comprise a further portion or cross-member, for example extending between the first and second sides. At least a portion of the further portion may extend obliquely, for example non-perpendicularly, between the first and second sides.

The further portion may comprise a surface which may face the closably open aperture or hook. The surface may comprise a concave surface. The surface may at least partly face the mouth of the openably closable aperture or hook. The surface may comprise a guide surface which may, in use, act to guide a chain link into a portion of the closably open aperture or hook, A mouth of the closably open aperture or hook may be provided between first and second ends of the peripheral portion. The first and second ends of the peripheral portion may be provided on the first side of the main body.

The further body may comprise a substantial T-shape. The further body may comprise a further surface which may be matable with the surface of the further portion.

For example, the further surface may comprise a convex surface. The further surface may be provided at or near an end of the further body.

Complementary first and second mating portions may be provided on the further body and the main body. A first mating portion, which may comprise a female portion, may be provided on the main body, for example, on or extending from the surface. A second mating portion, which may comprise a male portion, may be provided on the further body, for example, on, comprising or extending from an end of the T-shape. One or more grooves and/or recesses may be provided on the main body, for example, the end(s) of the peripheral portion, which may be matable with one or more recesses and/or grooves provided on the further body, for example, on one or both sides of the T-shape.

The chain connection link may comprise an arrangement for engaging with another item such as a deployment device, such as a retaining/lifting frame or clamp, for example, with a complementary engaging arrangement on the deployment device. The chain connection link engagement arrangement may comprise at least one further recess or nipple on the main body, which may be matable with the complementary engaging arrangement on the deployment device, which may comprise at least one nipple or recess. In one advantageous embodiment the main body may comprise a further female portion, for example through-hole, which may, in use, be matable with a retaining pin or bolt on the deployment device.

The further body, for example, a cross-piece of the T-shape, may comprise an arrangement, such as a hole or blind hole, for removably receiving a handle (handled tool). The handle may be adapted for use by an ROV.

In one embodiment, the lock arrangement may comprise a further (blind) hole on the further body, for example, on a leg of the T-shape, for example, at or on an end thereof, a further (blind) hole.

Alternatively, in an advantageous embodiment, the lock arrangement may comprise a further (blind) hole on the main body. The further (blind) hole may comprise or be provided by the female portion.

The lock arrangement may comprise a (captive) nut or a bolt on one of the further body or on the main body. The nut or the bolt may be provided within the further (blind) hole. In one embodiment, the lock arrangement may comprise a yet further (blind) hole on the main body, for example, on or extending from the surface.

The lock arrangement may comprise a (captive) bolt or a nut on one of the main body or the further body.

In one embodiment, the bolt or the nut may be provided within a yet further (blind) hole. The bolt or the nut of the main body may be accessible from a peripheral portion, for example, second side, of the main body. A further/second handle (handled tool) may be engaged or engagable with a head of the bolt of the main body. The further/second handle may be adapted for use by an ROV.

Alternatively, in an advantageous embodiment, the bolt may be provided on an end of the further body, for example, on a leg of the T-shape.

One of the nut or the bolt of the main body or the further body may comprise a plurality of circumferentially disposed threaded segments or elements movable between a radially distal position and a radially proximal position. The other of the bolt or nut may comprise a complementary threaded portion which may engage with the threaded segments when in one of the proximal or distal positions.

In use, the nut or bolt on the further body and the bolt or nut on the main body engage with one another. In this way the lock arrangement may be deployed by use of an ROV. ROV's typically only allow a limited number of movements, for example, push, pull and/or rotate.

The nut may be a ZIPNUT 0 available from Snap-on Incorporated.

The lock arrangement may comprise a coupling device comprising: a first member (for example bolt) provided with threads, a second member (for example nut) having an opening into and out of which said first member may be inserted (and optionally removed); threaded elements (segments) within said second member mounted for movement between a first position wherein the first member may be threaded within the second member and a second position where the threaded elements have a diameter larger than the diameter of the threads of the first member permitting the first member to slide axially in (and optionally out) to/of the second member as desired; and a manually (ROV) operable mechanism for moving the threaded elements between the second position and the first position. Such a coupling device is disclosed in W09815743 (THREAD TECHNOLOGY, INC).

The first member may comprise a bolt. The second member may comprise a nu:.

In one embodiment, the further handle may be used to engage/lock and/or disengage/unlock the second member (nut) and the first member (bolt) together, for example, move the threaded elements from said second/first position to said first/second position.

Alternatively, in an advantageous embodiment, the handle may be used to engage/lock and/or disengage/unlock the second member (nut) and the first member (bolt), for example, move the threaded elements from said second/first position to said first/second position.

The main body and/or the further body may be formed from metal.

According to a second aspect of the present invention there is provided a main body of a chain connection link according to the first aspect of the present invention.

According to a third aspect of the present invention there is provided a closing piece or further body of a chain connection link according to the first aspect of the present invention.

According to a fourth aspect of the present invention there is provided a chain, such as a mooring chain, comprising or including a chain connection link according to the first aspect of the present invention.

According to a fifth aspect of the present invention there is provided an assembly, such as a mooring assembly, comprising or including a chain connection link according to the first aspect of the present invention.

The (mooring) assembly may comprise a first portion of chain. The (mooring) assembly may comprise a second portion of chain. The first and second portions of chain may be linked together or connected by the chain connection link. The first portion of chain may be connected to the chain connection link by/via a further link. The further link may comprise an LLLC link or a pear link. An LLLC link may be used where the first and second portions of chain have links of the same size. A pear link may be used where the first and second portions of chain have links of different sizes.

According to a sixth aspect of the present invention there is provided an arrangement, such as a mooring arrangement, comprising a (mooring) assembly according to the fourth aspect of the present invention.

The mooring arrangement may comprise an offshore mooring arrangement. The mooring arrangement may comprise at least one floating structure or vessel. The mooring arrangement may comprise at least one wind turbine, for example, offshore/floating wind turbine.

According to a seventh aspect of the present invention there is provided a method of connecting or joining two chains or chain ends, such as two mooring chains or chain ends, together comprising: providing a chain connection link according to the first aspect of the present invention; attaching the chain connection link to a first chain by the closed aperture or eye; attaching the chain connection link to the second chain by the closably open aperture or hook; closing the closably open aperture or hook using the further body.

Preferably after closing the closably open aperture or hook, the method may comprise the step of locking the main body and further body together.

Attaching the chain connection link to the first chain may comprise providing an intermediate link, such as an LLLC link or pear link, between the chain connection link and the first chain portion.

Attaching the chain connection link to the second chain may comprise: locating the chain connection link and/or the intermediate link in a deployment device, for example frame or clamp; conveying the chain connection link to the second chain, for example, by a work-line attached to the deployment device; attaching/hooking the closably open aperture or hook onto the second chain.

Closing the closably open aperture or hook using the further body may comprise mating/presenting the further body with/to the main body, for example, using an ROV.

Locking the main body and further body together may comprise deploying the lock arrangement.

The further body may be mated with/presented to the main body by means of a first handle, which may be operable by an ROV. The first handle may be (removably) providable on the further body.

The further body and the main body may be locked together by means of a lock arrangement deployable/operable by a handle/first handle/further handle/second handle, for example, on the main body or further body, which handle may be operable by an ROV.

The method may comprise removing the deployment device from the chain connection link and/or intermediate link.

According to an eighth aspect of the present invention there is provided a method of disconnecting or separating two chains or chain ends, such as two mooring chain ends, connected or joined by a chain connection link according to the first aspect of the present invention.

The method may comprise: opening the closably open aperture or hook by unlocking/separating the further body from the main body; removing the chain connection link from the second chain by or via the closably open aperture or hook.

The method may comprise: attaching a deployment device to the chain connection link, for example, to a main body thereof.

The deployment device may be brought to the chain connection link by a work-line.

According to a ninth aspect of the present invention there is provided a method of tensioning a (mooring) line, wherein the method comprises: joining first and second chains or chain ends by the method of the seventh aspect of the present invention; adjusting the tension on (one of) the first or second chains, for example, by a (mooring) apparatus or mid-line tensioner.

One of the first or second chains may pass through or by threaded through a mooring apparatus (mid-line tensioner), for example of the type disclosed in W02018/197883 Al (FLINTSTONE TECHNOLOGY LTD).

The (mooring) apparatus may comprise: a guide portion for guiding a portion of a first mooring line, for example, comprised of the first and second chains, an arrangement for connecting or coupling the apparatus to a second mooring line, and a lock or lock member, wherein the guide portion may be movably connected to the arrangement, and the lock may be connected to, attached to or provided on the arrangement.

SECOND INVENTION

According to a tenth aspect of the present invention there is provided a deployment device, such as a frame or clamp for or adapted to hold, clamp, capture, retain and/or transport at least part of a chain connection link.

In one embodiment the deployment device may comprise first and second device portions, which may be hinged together. The first and second device portions may be closable relative to one another. In a closed disposition the deployment device may hold, clamp, capture and/or retain at least part of a chain link and/or an intermediate link.

In another embodiment the deployment device may comprise first and second device portions, which may be arranged to receive a chain connection link, for example main body thereof, therebetween.

In said another embodiment, the deployment device may comprise a bolt member. The bolt member may be movable, for example across a space or gap between the first and second device portions, for example by means of a device handle. The device handle may be ROV deployable. The device handle may be movable, for example along a slot on a cylindrical member, between first/unlocked/retracted and second/locked/extended positions.

The deployment device may comprise an arrangement for locating the at least part of the chain connection link and/or the intermediate link relative to the deployment device. For example, the first and/or second device portions may comprise first and/or second nipples, recesses or protrusions which may co-act with corresponding recesses, nipples or protrusions on at least part of the chain connection link.

The deployment device may be provided with an arrangement for securing the first and second device portions in a closed disposition. The securing arrangement may be openable or removable, for example, after the chain connection link has been used to connect first and second chains together.

The deployment device may comprise an arrangement for securing a work-line thereto. The securing arrangement may comprise a lifting point/eye or pad eye.

According to a eleventh aspect of the present invention there is provided a method of joining two chains or chain ends together comprising: connecting at least part of a chain connection link to a first chain; locating/fixing the at least part of the chain connection link within/on a deployment device; connecting/hooking the chain connection link to a second chain.

It will be appreciated that the at least part of the chain connection link may be connected to the first chain preferably before, but alternatively after, locating/fixing at least part (for example, main body) of the chain connection link within the deployment device.

Connecting at least part of a chain connection link to a first chain and/or locating/fixing the at least part of the chain connection link within/on a deployment device may be performed at surface, for example, on a deck, for example of a vessel.

Prior to connecting the chain connection link to the second chain, the deployment device/at least part of the chain connection link may be conveyed to a second chain, for example, by the work-line. Conveying the deployment device/at least part of the chain connection link may comprise over-boarding same from a deck and lowering same using the work-line.

After connecting the chain connection link to the second chain the deployment device may be removed. The deployment device may, therefore, comprise a removable deployment device.

After connecting the chain connection link to the second chain, and/or after removing the deployment device, a tension on the second chain can be adjusted, for example, tightened or loosened.

It should be understood that the features defined above in accordance with any aspect of the present invention or below relating to any specific embodiment of the invention may be utilised, either alone or in combination with any other defined feature, in any other aspect or embodiment or to form a further aspect or embodiment of the invention.

BRIEF DESCRIPTION OF DRAWINGS

Embodiments of the present invention will now be described by way of example only, and with reference to the accompanying drawings, which are: Figure 1(a) a side view of a main body of a chain connection link according to a first embodiment of the present invention; Figure 1(b) a cross-sectional side view of the main body of the chain connection link of Figure 1(b); Figure 2(a) a perspective view of a further body of the chain connection link of Figure 1(a) including a first handle; Figure 2(b) a cross-sectional perspective view of the further body of Figure 2(a); Figure 3 a side view of the chain connection link of Figure 1 with the main body and further body retained together; Figures 4(a)-(b) first and second intermediate links; Figure 5 a perspective view of the main body of Figure 1(a) and a first intermediate link held within a deployment device comprising a clamp according to an embodiment of the present invention, the intermediate link being connected to a first chain (not shown); Figure 6 the main body of Figure 1(a) being presented to and hooked onto a second chain; Figure 7 the further body being presented to the main body; Figures 8(a)-(b) first and second chains connected by the chain connection link of Figure 1(a) with a first intermediate link; Figures 9(a)-(b) first and second chains connected by the chain connection link of Figure 1(a) with a second intermediate link; Figure 10 a side view of a mooring apparatus according to an embodiment of the present invention; Figures 11(a)-(b) a side view and an end view of the chain connection link of Figure 1(a); Figure 12 a perspective view of the main body of the chain connection link of Figure 1(a) connected to a first chain via a second intermediate link; Figure 13 a perspective view of the clamp of Figure 5 for use with the chain connection link of Figure 1(a); Figure 14 a perspective view of the main body of the chain connection link of Figure 1(a) being received into the clamp of Figure 13; Figure 15 a detailed perspective partial view of the clamp of Figure 13; Figure 16 a detailed perspective view of the main body of the chain connection link of Figure 1(a); Figure 17 a perspective view of the clamp of Figure 13 with the main body of the chain connection link held therein; Figure 18 a further perspective view of the clamp of Figure 13 with the main body of the chain connection link held therein, the clamp being secured closed; Figures 19(a)-(b) perspective views of a second handle inserted in the main body of the chain connection link through the clamp; Figure 20 a perspective view of the main body and clamp being conveyed by a work-line; Figures 21(a)-(b) perspective views of the main body being presented to a second chain; Figure 22 a perspective view of the main body being connected to/hooked on to an end of the second chain; Figures 23(a)-(c) a series of perspective view of the further body being presented to and locked with the main body; Figure 24(a) a cross-sectional side view of the main body and further body positioned together; Figure 24(h) a cross-sectional perspective view of a female portion or nut captive within the main body; Figure 25 a perspective view of a female member of a lock arrangement of the chain connection link of Figure 1(a); Figure 26 a perspective view of the main body and further body of the chain connection link of Figure 1(a) locked together; Figure 27 a perspective view of the clamp of Figure 13; Figure 28 a side view of first and second chains connected together by the chain connection link of Figure 1(a) and the intermediate link of Figure 4(b); Figure 29 a perspective view of a mooring apparatus comprising the first and second connected chains of Figure 28; Figure 30 first and second chains connected by a chain connection link according to a second embodiment of the present invention; Figure 31(a)-(b) a side view and a perspective view, respectively, of a main body of the chain connection link of Figure 30; Figure 32(a)-(b) perspective views of a further body of the chain connection link of Figure 30; Figure 33(a)-(b) perspective views of a deployment device comprising a frame according to a further embodiment of the present invention; Figures 34(a)-(b) side views of the main body of the chain connection link of Figure 30 being deployed on a catenary chain and on a short length of chain, respectively; Figures 35(a)-(d) a series of side views of the main body of the chain connection link off Figure 30 being presented to and hooked on a chain; Figures 36(a)-(d) a series of perspective views of a further body of the chain connection link of Figure 30 being presented to and locked with the main body; Figures 37(a)-(e) a series of views of the deployment device being removed from the main body after the further body has been locked with the main body; Figures 38(a)-(b) side views of the chain connection link of Figure 30 in situ connecting first and second chains; Figures 39(a)-(e) a series of views of the deployment device being attached to the main body; Figures 40(a)-(e) a series of perspective views of the further body of the chain connection link of Figure 30 being unlocked from and removed from the main body; Figures 41(a)-(e) a series of side views of the main body of the chain connection link of Figure 30 being unhooked from and withdrawn away from a chain; Figures 42(a)-(b) first and second cross-sectional side views of the chain connection link of Figure 30; Figures 43(a)-(b) cross-sectional side views showing a first handle being presented to and inserted within the further body; Figure 44 a side view of the first handle of Figures 43(a)-(b); Figures 45(a)-(b) detailed cross-sectional side views of a locking arrangement of the chain connection link of Figure 30; Figures 46(a)-(b) further cross-sectional side views of the chain connection link of Figure 30; Figures 47(a)-(b) a side view and a cross-sectional side view of the further body of the chain connection link of Figure 30; Figure 48 a perspective view of the chain connection link of Figure 30 with the main body and further body separated one from the other; Figures 49(a)-(f) a series of views showing how the further body is presented to and locked with the main body; and Figure 50 a perspective view of a bolt of the chain connection link of Figure 30.

DETAILED DESCRIPTION OF DRAWINGS

Referring initially to Figures 1(a) to 9(b), there is shown a chain connection link, such as a mooring chain connection link, generally designated 2, according to a first embodiment of the present invention. The chain connection link 2 comprises a main body 4. The chain connection link 2, that is main body 4, comprises a closed aperture or eye 6. The chain connection link 2 comprises a closably open aperture or hook 8 which comprises a mouth 10.

The mooring chain connection link 2 is adapted for use offshore and/or underwater/subsea.

The closed aperture 6 and/or the closably open aperture 8 are formed by or on the main body 4.

The chain connection link 2 comprises a closing piece/bridge or further body 12 adapted to close a periphery 14 of the closably open aperture 8 or mouth 10 of the hook. A lock arrangement 16 (16a, 16b) is provided which can lock or secure the main body 4 and further body 12 together.

The main body 4 comprises an outer peripheral portion 18 which comprises at least part of the closed aperture 6 and/or the closably open aperture 8.

The main body 4 comprises first and second ends 20a, 20b, for example, first and second curved ends. The main body may comprise first and second sides 22a, 22b, for example, first and second at least part linear sides. The main body 4 comprises a further portion or cross-member 24 extending between the first and second sides 22a, 22b. At least a portion of the further portion 24 extends obliquely (non-perpendicularly) between the first and second sides 22a, 22b.

The further portion 24 comprises a surface 26 which faces the closably open aperture or hook 8. The surface 26 comprises a concave surface. The surface 26 at least partly faces the mouth 10 of the openably closable aperture or hook 8.

The mouth 10 of the closably open aperture or hook 8 is provided between first and second ends 20a, 20b of the peripheral portion 18 of the main body 4. The first and second ends 20a, 20b of the peripheral portion 18 of the main body 4 are provided on the first side 22a of the main body 4.

The further body 12 comprises a substantial T-shape. The further body 12 comprises a further surface 28 which is matable with the surface 26 of the further portion 24. For example, the further surface 28 comprise a convex surface complementary to the concave surface 26. The further surface 28 is provided at or near an end 30 of the further body 12.

Complementary first and second mating portions 32, 34 are provided on the further body 12 and the main body 4. A first mating portion 32, which comprises a female portion, is provided on the main body 4, for example, on or extending from the surface 26. A second mating portion 34, which comprises a male portion, is provided on the further body 12, for example, on or extending from an end of the T-shape.

One or more grooves 36 and/or lips 38 are provided on the main body 4, for example, at or on the end(s) of the peripheral portion 18, which are matable with one or more recesses 40 and/or lips 42 provided on the further body 12, for example, on one or both sides 44, 46 of the T-shape.

The chain connection link 2 comprises an arrangement 48 for engaging with another item such as a deployment device which in this embodiment comprises a clamp 50, for example, with a complementary engaging arrangement 52 on the clamp 50. In this embodiment, the chain connection link engagement arrangement 48 comprises at least one further recess on the main body 4, which is matable with the complementary engaging arrangement 52 on the clamp 50, which comprises at least one nipple.

The further body 12, for example, a cross-piece 54 of the T-shape, comprises an arrangement, such as a (blind) hole 56, for removably receiving a first handle 58. The first handle 58 is adapted for use by an ROV underwater or subsea.

The lock arrangement 16 comprises a further (blind) hole 60 on the further body 12, for example, on a leg 62 of the T-shape, for example, at or on an end thereof. The lock arrangement 16 comprises a (captive) female portion or nut 64 (or male portion or bolt) on the further body 12. The nut 64 (or bolt) is provided within the further (blind) hole 60. The lock arrangement 16 comprises a yet further hole 66 on the main body 4, for example, on or extending from the surface 26 to the second side 22b. The lock arrangement 16 comprises a (captive) male portion or bolt 68 (or female portion or nut) on the main body 4. The bolt 68 (or nut) is provided within the yet further hole 66. A head 70 of the bolt 68 (or nut) of the main body 4 is accessible from the peripheral portion 18, for example, second side 22b, of the main body 4. A further/second handle 72 is engaged or engagable with the head 70 of the bolt 68 of the main body 4. The further handle 72 is adapted for use by an ROV underwater or subsea.

One of the nut 64 or the bolt 68 of the main body 4 or the further body 12 comprise a plurality of circumferentially disposed threaded segments or elements 74 (see Figure 25) movable between a radially distal position and a radially proximal position. The other of the bolt 68 or the nut 64 comprises a threaded (external or internal) portion 76.

In use, the nut 64 (or bolt) on the further body 12 and the bolt 68 (or nut) on the main body 4 are positioned one within the other and then engaged with one another. In this way the lock arrangement 16 can be deployed by use of an ROV, which only allows for a limited number of movements, for example, push, pull and/or rotate. In this embodiment, the nut 64 is engaged with the bolt by rotating (clockwise) the further handle 72.

The nut 64 can be a ZI PN UT 0 available from Snap-on Incorporated.

The lock arrangement 16, therefore, comprises a coupling device comprising: a first member (for example, bolt 68) provided with threads, a second member (for example, nut 64) having an opening into and out of which said first member can be inserted (and optionally removed); threaded elements (segments) 72 within said second member mounted for movement between a first position wherein the first member can be threaded within the second member and a second position where the threaded elements have a diameter larger than the diameter of the threads of the first member permitting the first member to slide axially in (and optionally out) to/of the second member as desired; and an (manually/ROV) operable mechanism for moving the threaded elements between the second position and the first position. Such a coupling device is disclosed in W09815743 (THREAD TECHNOLOGY, INC).

The first member comprises bolt 68. The second member comprises nut 64.

The main body 4 and/or the further body 12 are formed typically from a metal, metals or metallic materials.

Referring to Figures 10 to 29, the present invention provides an assembly, generally designated 100, such as a mooring assembly, comprising or including the chain connection link 2.

The (mooring) assembly 100 comprises a first chain 102. The (mooring) assembly comprises a second chain 104. The first and second chains 100, 102 are linked together or connected by the chain connection link 2. The first chain 102 is connected to the chain connection link 2 by/via a further/intermediate link 106. The further link 106 typically comprise an LLLC link (see Figure 4(a) and Figures 8(a) and 8(b)) or a pear link (see Figure 4(b) and Figures 9(a) and 9(b)). An LLLC link can be used where the first and second chains 102, 104 have links of the same size. A pear link can be used where the first and second chains 102, 104 have links of different sizes.

According to the present invention there is provided an arrangement, such as a mooring arrangement, comprising a (mooring) assembly 100.

The mooring arrangement beneficially comprises an offshore mooring arrangement.

The mooring arrangement beneficially comprises at least one floating structure or vessel. The mooring arrangement advantageously comprises at least one wind turbine, for example, offshore/floating wind turbine.

The present invention provides a method of joining two chains 102, 104 or chain ends, such as two mooring chains or chain ends, together comprising: providing a chain connection link 4; attaching the chain connection link 4 to a first chain 102 by the closed aperture or eye 6; attaching the chain connection link 4 to the second chain 104 by the closably open aperture or hook 8; closing the closably open aperture or hook 8 using the further body 12.

After closing the closably open aperture or hook 8, the method comprises the step of locking the main body 4 and further body 12 together.

Attaching the chain connection link 2 to the first chain 102 comprises providing a further or intermediate link 106, such as an LLLC link or pear link, between the chain connection link 4and the first chain 102.

Attaching the chain connection link 4 to the second chain 104 comprises: locating the chain connection link 4and/or the intermediate link 106 in a clamp 50; conveying the chain connection link 4 to the second chain 104, for example, by a work-line 108 attached to the clamp 50; attaching/hooking the closably open aperture or hook 8 onto the second chain 104.

Closing the closably open aperture or hook 8 using the further body 12 comprises mating/presenting the further body 12 with/to the main body 4, for example, using an ROV (not shown).

Locking the main body 4 and further body 12 together comprises deploying the lock arrangement 16.

The further body 12 is mated with/presented to the main body 4 by means of a first handle 58, which is operable by the ROV. The first handle 58 is (removably) providable on the further body 12.

The further body 12 and the main body 4 are locked together by means of the lock arrangement 16 deployable/operable by a second handle 72, for example, on the main body 4, which second handle 72 is operable by the ROV.

The method comprises removing the clamp 50 from the chain connection link 2 and/or intermediate link 106.

The present invention provides a method of tensioning a (mooring) line, wherein the method comprises: joining first and second chains 102, 104 or chain ends by the abovementioned method; adjusting a tension on (one of) the first or second chains 102, 104, for example, by a (mooring) apparatus or mid-line tensioner 200.

One of the first or second chains 102, 104 passes through or is threaded through the mooring apparatus (mid-line tensioner 200) which can be, for example, of the type disclosed in W02018/197883 Al (FLINTSTONE TECHNOLOGY LTD).

The (mooring) apparatus (mid-line tensioner 200) comprises: a guide portion 202 for guiding a portion of a first mooring line 204, for example, comprised of the first and second chains 102, 104, an arrangement 206 for connecting or coupling the apparatus to a second mooring line 208, and a lock or lock means 210, wherein the guide portion 202 being movably connected to the arrangement 204, and the lock 210 being connected to, attached to or provided on the arrangement 206.

According to an embodiment of the present invention there is provided a deployment device which in this embodiment comprises a clamp 50 for or adapted to hold, clamp, capture, retain and/or transport a main body 4 of a chain connection link 2.

The clamp 50 comprises first and second clamp portions 51a, 51b, which are hinged together. The first and second clamp portions 51a, 51b are closable relative to one another. In a closed disposition the clamp 50 holds, clamps, captures and/or retains a chain connection link 50 and/or an intermediate link 106.

The clamp 50 comprises an arrangement 52 for locating the chain connection link 4 and/or the intermediate link 106 relative to the clamp 50. For example, the first and/or second clamp portions 51a, 51b comprise first and/or second nipples 53 (or recesses) which co-act with corresponding engaging arrangement 48, i.e. recesses (and/or nipples) on the chain connection link 4.

The clamp 50 is provided with an arrangement 78 for securing the first and second clamp portions 51a, 51b in a closed disposition. The securing arrangement 78 is openable or removable, for example, after the chain connection link 4 has been used to connect first and second chains 102,104 together. The securing arrangement 78 can be of a known type, for example, a quick release toggle mechanism, such as that available from Sea Catch O. The clamp 50 comprises an arrangement for securing a work-line thereto. The work-line securing arrangement 80 comprises a lifting point/eye or pad eye.

The present invention provides a method of joining two chains 102, 104 or chain ends together comprising: connecting at least part of a chain connection link 2 to a first chain 102; locating/fixing at least part of the chain connection link 2 within a clamp 50; connecting/hooking the chain connection link 2 to a second chain 104.

It will be appreciated that the at least part of the chain connection link 2 can be connected to the first chain 102 advantageously before, but alternatively after, locating/fixing the at least part of the chain connection link 2 (main body 4) within the clamp 50.

Connecting at least part of a chain connection link 2 to a first chain 102 and/or locating/fixing the at least part of the chain connection link 2 within a clamp 50 can be performed at surface, for example, on a deck, for example of a vessel (not shown).

Prior to connecting the chain connection link 2 to the second chain 104, the clamp 50 / at least part of the chain connection link 2 can be conveyed to a second chain 104, for example, by work-line 108. Conveying the clamp 50/at least part of the chain connection link 2 typically comprises over-boarding same from a deck and lowering same using the work-line 108. Prior to connecting the chain connection link to the second chain, the clamp (and chain connection link) After connecting the chain connection link 2 to the second chain 104, the clamp can be removed. The clamp 50, therefore, comprises a removable deployment device or clamp.

After connecting the chain connection link 2 to the second chain 104, and/or after removing the clamp 50, a tension on the second chain 104 can be adjusted, for example, tightened or loosened via mid-line tensioner 200.

Referring now to Figures 30 to 50, there is shown a chain connection link, such as a mooring chain connection link, generally designated 2', according to a second embodiment of the present invention. The chain connection link 2' of the second embodiment is similar to the chain connection link 2 of the first embodiment in many respects, like parts being denoted by like numerals but suffixed The chain connection link 2' comprises an arrangement 48' including through-hole 49' for engaging with another item such as a deployment device which in this embodiment comprises a frame 50', for example, with a complementary engaging arrangement (bolt) 52' on the frame 50'. In this embodiment, the chain connection link engagement arrangement 48' comprises a through-hole 49' in the main body 4', which is matable with the complementary engaging arrangement 52' on the frame 50', which comprises at least one retractable bolt.

The further body 12', for example, a cross-piece 54' of the T-shape, comprises an arrangement, such as a (blind) hole 56', for removably receiving a first handle 58'.

The first handle 58' is adapted for use by an ROV 300 underwater or subsea.

The lock arrangement 16' comprises a further (blind) hole 60' on the main body 4'. The further (blind) hole 60' comprises or is provided by the female portion.

The lock arrangement 16' comprises a (captive) female portion or (threaded) nut 64' on the main body 4'. The nut 64' is provided within the further (blind) hole 60'. The lock arrangement 16'. The lock arrangement 16' comprises a (captive) male portion or (threaded) bolt 68' on the further body 12'. The bolt 68' is provided on an end of the further body 12'. A head of the bolt 68' is provided in the hole, such that the first handle 58' can be disengagably engaged therewith. The first handle 58' has a hexagonal (hex) drive head engagable with a head 70' of the bolt 68' to drive the bolt 68'.

One of the nut 64' or the bolt 68' comprises a plurality of circumferentially disposed threaded segments or elements 74' movable between a radially distal position and a radially proximal position. The other of the bolt 68' or the nut 64' comprises a threaded (external or internal) portion 76.

In use, the nut 64' on the main body 4' and the bolt 68' on the further body 12' are positioned one within the other and then engaged with one another. In this way the lock arrangement 16' can be deployed by use of an ROV, which only allows for a limited number of movements, for example, push, pull and/or rotate. In this embodiment, the nut 64' is engaged with the bolt by rotating (clockwise) the first handle 58'.

The nut 64' can be a ZIPNUT 0 available from Snap-on Incorporated.

The present invention provides a deployment device comprising a frame 50' for or adapted to hold, clamp, capture, retain and/or transport at least part of the chain connection link 2', that is main body 4'.

In this embodiment the deployment device comprises first and second device portions 51a', 51b', which are arranged to receive a chain connection link 2', for example main body 4' thereof, therebetween.

The deployment device comprise a bolt member 55'. The bolt member 55' is movable, for example across a space or gap between the first and second device portions 51a', 51b', for example by means of a device handle 57'. The device handle 57' is ROV deployable. The device handle 57' is movable, for example along a slot 59' on a cylindrical member 61' of the deployment device, between first/unlocked/retracted and second/locked/extended positions.

The deployment device comprises an arrangement for locating the at least part of the chain connection link 2' and/or the intermediate link 106' relative to the deployment device. For example, the first and/or second device portions 51a', 51b' co-act with corresponding recesses on the main body 4' of the chain connection link 2'.

The deployment device comprises an arrangement for securing a work-line 108' thereto. The securing arrangement comprise a pair of lifting points/eyes or pad eyes.

The frame 50' comprises a bridal arrangement 80' for securing a work-line thereto. The work-line securing arrangement 80' comprises a pair of lifting points/eyes or pad eyes.

An advantage of the chain connection link 2' of the second embodiment over the chain connection link 2 of the first embodiment is that in the second embodiment the main body 4' and further body 12' can be engaged and locked together and/or unlocked and disengaged using a single (ROV operable) handle 58'.

It will be appreciated that the embodiments of the present invention hereinbefore described are given by way of example only and are not meant to limit the scope of thereof in any way.

It will be appreciated that one or more embodiments of the present invention may provide one or more benefits over the prior art.

Claims

CLAIMS1. A chain connection link, such as a mooring chain connection link, comprising a main body having a closed aperture or eye and a closably open aperture or hook. 5 2. A chain connection link as claimed in claim 1, wherein: the closably open aperture or hook comprises a mouth; the mooring chain connection link is adapted for use offshore and/or underwater/subsea; and/or the closed aperture or eye and/or the closably open aperture or hook is/are formed by, from or on the main body.3. A chain connection link as claimed in either of claims 1 or 2, wherein: the chain connection link comprises a closing piece or further body adapted to close, for example a periphery of, the closably open aperture or mouth of the hook; a lock arrangement is provided which can lock or secure the main body and further body together; and/or the main body comprises an outer peripheral portion which comprises at least part of the closed aperture and/or the closably open aperture or hook.4. A chain connection link as claimed in any preceding claim, wherein the main body comprises: first and second ends, for example, first and second curved ends; first and second sides, for example, first and second at least part linear sides; a mouth of the closably open aperture or hook being provided between first and second ends of the peripheral portion, the first and second ends of the peripheral portion being provided on the first side of the main body; and/or a further portion or cross-member extending between the first and second sides, wherein optionally at least a portion of the further portion extends obliquely between the first and second sides, and optionally the further portion comprises a surface which faces the closably open aperture or hook, the surface comprise a concave surface, and the surface at least partly face the mouth of the openably closable aperture or hook.5. A chain connection link as claimed in any preceding claim, wherein: a/the further body comprises a substantial 1-shape, the further body comprising a further surface which is matable with a/the surface of a/the further portion, and optionally, the further surface comprises a convex surface, the further surface being provided at or near an end of the further body.6. A chain connection link as claimed in any preceding claim, wherein: complementary first and second mating portions are provided on a/the further body and the main body, a first mating portion which comprising a female portion being provided on the main body either on or extending from the surface, a second mating portion which comprises a male portion being provided on the further body.7. A chain connection link as claimed in any preceding claim, wherein: one or more grooves and/or recesses provided on the main body are matable with one or more recesses and/or grooves provided on the further body.8. A chain connection link as claimed in any preceding claim, wherein: the chain connection link comprises an arrangement for engaging with another item such as a deployment device, such as with a complementary engaging arrangement on the deployment device, and optionally: the chain connection link engagement arrangement comprises at least one further recess or a nipple on the main body which is matable with the complementary engaging arrangement on the deployment device which comprises at least one nipple or recess; the main body comprises a further female portion which, in use, is matable with a retaining pin or bolt on the deployment device.9. A chain connection link as claimed in any preceding claim, wherein: a/the further body comprises an arrangement, such as a hole, for removably receiving a handle, and optionally the handle is adapted for use by an ROV.10. A chain connection link as claimed in any preceding claim, wherein: a/the lock arrangement comprises a further (blind) hole on a/the further body, or a/the lock arrangement comprises a further (blind) hole on the main body; and/or a/the lock arrangement comprises a (captive) nut or a bolt on one of a/the further body or on the main body, the nut or the bolt optionally being provided within the further (blind) hole; and optionally the lock arrangement comprising a yet further (blind) hole on the main body; the lock arrangement comprising a (captive) bolt or a nut on one of the main body or a/the further body, the bolt or the nut optionally being provided within a yet further (blind) hole; the bolt or the nut of the main body being accessible from a peripheral portion; a further handle being engaged or engagable with a head of the bolt of the main body, and optionally the further handle is adapted for use by an ROV; and/or the bolt is provided on an end of a/the further body.11. A chain connection link as claimed in claim 10, wherein: one of the nut or the bolt of the main body or the further body comprises a plurality of circumferentially disposed threaded segments or elements movable between a radially distal position and a radially proximal position, and the other of the bolt or nut comprises a complementary threaded portion which engages with the threaded segments when in one of the proximal or distal positions; and/or in use, the nut or bolt on the further body and the bolt or nut on the main body engage with one another.12. A chain connection link as claimed in any preceding claim, wherein: a/the lock arrangement comprises a coupling device comprising: a first member provided with threads, a second member having an opening into and out of which said first member can be inserted (and optionally removed); threaded elements (segments) within said second member mounted for movement between a first position wherein the first member may be threaded within the second member and a second position where the threaded elements have a diameter larger than the diameter of the threads of the first member permitting the first member to slide axially in (and optionally out) to/of the second members desired; and a manually (ROV) operable mechanism for moving the threaded elements between the second position and the first position, and optionally the first member comprises a bolt and the second member comprises a nut, and/or a/the further handle can be used to engage/lock the second member (nut) and the first member (bolt) together, for example, move the threaded elements from said second position to said first position; or a/the handle can be used to engage/lock and/or disengage/unlock the second member (nut) and the first member (bolt), for example move the threaded elements from said second/first position to said first/second position. . 13. A chain connection link as claimed in any preceding claim, wherein: the main body and/or a/the further body is/are formed from metal or from a metallic material(s).14 A main body of a chain connection link as claimed in any of claims 1 to 13.15. A closing piece or further body of a chain connection link as claimed in any of claims 1 to 13.16. A chain, such as a mooring chain, comprising or including a chain connection link according to any of claims 1 to 13.17. An assembly, such as a mooring assembly, comprising or including a chain connection link according to any of claims 1 to 13.18. An assembly as claimed in claim 17, wherein: the (mooring) assembly comprises a first portion or length of chain and a second portion or length of chain, the first and second portions of chain being linked together or connected by the chain connection link, and optionally the first portion of chain is connected to the chain connection link by/via a further link.19. An arrangement, such as a mooring arrangement, comprising a (mooring) assembly according to either of claims 17 or 18, wherein optionally the arrangement comprises an offshore mooring arrangement, the arrangement comprises at least one floating structure or vessel, and/or the arrangement comprises at least one wind turbine, for example, offshore/floating wind turbine.20. A method of connecting or joining two chains or chain ends, such as two mooring chains or chain ends, together comprising: providing a chain connection link according to any of claims 1 to 13; attaching the chain connection link to a first chain by the closed aperture or eye; attaching the chain connection link to the second chain by the closably open aperture or hook; closing the closably open aperture or hook using the further body.21. A method of joining two chains or chain ends together as claimed in claim 20, wherein the method comprises one or more of: after closing the closably open aperture or hook, the step of locking the main body and further body together; attaching the chain connection link to the first chain comprises providing an intermediate link, such as an LLLC link or pear link, between the chain connection link and the first chain; attaching the chain connection link to the second chain comprises: locating the chain connection link and/or the intermediate link in a deployment device; conveying the chain connection link to the second chain, for example, by a work-line attached to the deployment device; attaching/hooking the closably open aperture or hook onto the second chain; closing the closably open aperture or hook using the further body comprises mating/presenting the further body with/to the main body, for example, using an ROV; locking the main body and further body together comprises deploying the lock arrangement; the further body being mated with/presented to the main body by means of a first handle, which is operable by an ROV; the further body and the main body being locked together by means of a lock arrangement deployable/operable by said first handle or a second handle, which is operable by an ROV; removing the deployment device from the chain connection link and/or intermediate link.22. A method of disconnecting or separating two chains or chain ends, such as mooring chain ends, connected or joined by a chain connection link according to any of claims 1 to 13, the method comprising: opening the closably open aperture or hook by unlocking/separating the further body from the main body; removing the chain connection link from the second chain by or via the closably open aperture or hook.23. A method of tensioning a (mooring) line, wherein the method comprises: joining first and second chains or chain ends by the method of either of claims 20 or 21; adjusting the tension on (one of) the first or second chains, for example, by a (mooring) apparatus or mid-line tensioner.24. A deployment device adapted to hold, clamp, capture, retain and/or transport at least part of a chain connection link.25. A method of joining two chains or chain ends together comprising: connecting at least part of a chain connection link to a first chain; locating/fixing the at least part of the chain connection link within or on a deployment device; connecting/hooking the chain connection link to a second chain.