MXPA00011684A - Apparatus and method for deploying an object or a load on the seabed - Google Patents

Abstract

The present disclosure concerns a method and an apparatus (50), for deploying an object or a load (43) on the seabed (4), the object or the load (43) being coupled to hoisting means, such as a hoisting wire (42) in order to enable the object or the load (43) to be lowered to the seabed from a vessel (40), the apparatus (50) comprising a body (53) having means (57, 58) for releasably securing the object or the load (43) to the body (53) and propulsion means (56) for moving the body when submerged, whereby the propulsion means (56) are positioned offset from the means (57, 58) for releasably securing the object or the load (43), in order to be able to induce rotational control on the hoisting means (42), when the propulsion means are in use.

Description

AN APPARATUS AND METHOD FOR DEPLOYING AN OBJECT OR A LOAD IN THE MARINE BED Field of the Invention The present invention relates to an apparatus according to the preamble of Claim 1.

BACKGROUND OF THE INVENTION The present invention refers to a system for guiding, controlling and placing, used the deployment and / or recovery of loads (packages) of up to more than ± 1000 tons on the seabed, at a great depth. Structurally, the system comprises a main module, and a smaller module linked together by a structure. Due to its functions, the structure of the system can be directly attached to a load or alternatively to any crane means, thus ensuring that the loads (packages) are deployed. Likewise, the system can release the aforementioned load at any chosen moment. The system also comprises, high pressure means and impulse control, making it possible to control the behavior of the load while it is being deployed through the entire column of water. Due to the fact that oil and gas in the sea can also be exploited by means of floating production platforms, said exploitation of the oil and gas layers requires that several heavy objects be deployed in the river bed, in addition, these objects have to be placed on the seabed with relatively high accuracy. Due to the fact that at present the exploitation of oil is being conducted to a greater depth, achieving the required accuracy is increasingly difficult. To achieve such accuracy according to traditional methods, generally a crane device is used. The loads are lowered to the seabed by means of auxiliary control cables either attached to the same vessel and / or one or more auxiliary installation supports. The use of such methods is extremely expensive. The last one has been devised with the purpose of controlling the difficult moments in the installation aids induced mainly by the profiles of the current changes, but also by the balanced cables without torsion. For the same reason, the objective is also to guide the load towards its final orientation and within its required objective area. Therefore the object of the present invention is to devise an appropriate system and method by means of which charges (packages) will be deployed, controlled and placed on the seabed, in a cheaper and faster way than conventional methods of installation . This object according to the present invention is achieved due to the characteristics, which illustrate it according to Claim 1. Therefore it is possible that the apparatus is provided with a first and second propulsion means secured to the body, being in first and second propulsion means positioned on opposite sides of the means for removably securing the object of the load. With these measures, an anti-turn device is provided.

In addition, with the impellers the position of the apparatus, and in this way the load with respect to the load can be adjusted and controlled. In accordance with the present invention, it is possible for the apparatus to be provided with means for adjusting the distance between the first and the second propulsion means. It is also possible that the first propulsion means is placed in a first module and that the second propulsion means is placed in a second module. According to the present invention and in order to eradicate these traditional costs, the system is provided with a set of four pushers that work in pairs, each of them having a dedicated function, that is, as a function of torsion control and a translation function. These pushers are mounted on each side of the structure of the system, two by two in such a way as to achieve that the aforementioned torsion control dedicating both lower pushers to this torsion control function, and to achieve the control of translation by dedicating both upper pushers to this translation function.

In addition, the second counter module can be moved horizontally over a section of the structure, with the aim of improving torsion control and minimizing stress cycles in the overall structure. It should be understood that this structure comprises a hydraulically activated clamping system, which ends in dedicated clamping adapters provided with a high friction medium. According to the present invention it is further possible that the propulsion means are provided in the form of pushers. As mentioned above, it is possible that the first propulsion means are placed in a first module, and that the second propulsion means are placed in a second module. The second module could be attached to an arm, its length being adjustable. According to a preferred embodiment of the present invention, the first module is detachably secured to the apparatus. In accordance with the present invention, it is possible that the means for removably securing a load comprises hydraulic jacks. In addition, the means for releasably securing a load on the apparatus could be provided with specially designed adapters with the adapters covered, with a high friction medium. In order to achieve the accuracy required during deployments, it is preferred that the apparatus be provided with the means adapted to transmit information in the direction of an object on the seabed, with means for receiving a reflection of the signal transmitted to the object, and a processor for computing the reflected information in order to establish the position of the apparatus with respect to the object . Also, the apparatus could be provided with a distance record. Means to transmit information may include sonar equipment, such as a high-resolution sonar equipment. When the position of the load to be deployed with respect to the object on the seabed is determined, using the sonar equipment, the placement of the load could be completed using a distance record. So it is possible to dissociate this final placement activity from the surface support. According to the present invention not only the apparatus, but a method for deploying an object or a load on a seabed are provided, characterizing the method in which the method comprises the steps of: Moving the object or load in the direction of the bed marine, by means of a crane cable, exert a force on the object or load, or on the first crane cable approximately at the end of the bottom of the same by means of a second crane cable and apart manipulate the position of the object or loading by means of an apparatus according to the aforementioned, the apparatus being adhered close to the object or the load. It is also possible that during the deployment of object or load, object or load are lifted at least partially by means of the secondary crane cable. According to the present invention it is possible that during the deployment of the object or the load, the positioning of the apparatus is achieved using a navigation system and differential global positioning system (DGPS), connected with a hydroacoustic positioning reference system (HPR). ), a Doppler device and a fiber optic Gyro. It is also possible that the apparatus transmits information in the direction of an object on the seabed, and that the apparatus receives a reflection of the signal transmitted to the object, and that the reflected information is used to establish the position of the apparatus with respect to the object. , and that the placement of the load is achieved by means of a distance record.

Summary of the Invention. According to the present invention it is possible that: The first crane cable is released until the first crane cable is at least partially resting on the seabed, the object or load processing and a part of the first cable of crane by means of the secondary crane cable, and manipulation of the position of the object or load by means of the apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be explained in detail below with reference to the accompanying drawings: Figure 1 illustrates a schematic overview of an FPSO (Flotation, Production, Storage and Discharge System) dedicated to sea petrochemical recoveries in. Figure 2 illustrates a crane vessel according to the prior art, and the deployment of the load rigged to the ship block with relatively long cables by means of which it is possible to see that the control of the load is virtually impossible at a large depth . Figure 3 illustrates a crane vessel according to the prior art, and illustrates a load rigged not only to the block of the guide ship, but also to auxiliary cables on the other side of the vessel as well as to a secondary surface support cable with the object to exercise a certain amount of control over the load. Figure 4 illustrates a crane vessel and a system for deploying and / or recovering a cargo to and / or from the seabed in accordance with the present invention. Figure 5 illustrates a detailed overview of a possible mode of the system while being committed to the activities illustrated in Figure 4. Figure 6 illustrates the system seen in accordance with Figure 5 from above.

Figure 7 illustrates a detail of the system (adapting shoes for a tube and / or a crane block) according to Figure 5. Figures 8 and 8a illustrate a cross-sectional view of the main module of the hardware of the system required with the object of directing the deployment and / or recovery activities in accordance with the present invention. Figures 9 and 10 illustrate a possible use of the main module of the system as an independent equipment during the deployment of an anchor and an anchor chain according to the present invention. Figure 11 illustrates a purpose designed for the crane block to be used in conjunction with the system according to the present invention. Figure 12 illustrates one embodiment of the main module of the system being used for the deployment and installation of a driverless coil part at a great depth in accordance with the present invention. Figure 13 illustrates the modality of the main module of the system being used to deploy and store the rigid and / or flexible elevators to a lift base in a driverless mode at a great depth.

Detailed Description of the Invention.

According to Figure 1, which presents a distribution of an FPSO 1 with a rotating production chimney 1 1 from which the elevators 2 exit, said elevators connecting to their elevator bases 3 on the seabed. During its production life, it is equivalent for the FPSO to remain within the range of permissible dynamic excursion and therefore the FPSO 1 is taken to the seabed 4 by means of the legs 5 which are supported by the anchors 6. The exploitation of oil or gas according to Figure 1, by means of a production vessel 1, requires that several relatively heavy objects be placed on seabed 4 with relatively high accuracy. To ensure proper and secure anchoring by means of the anchoring legs 5, it is required that these anchoring legs 5 have approximately the same length. In practice these anchors can be used for this application, with a weight of 50 tons or more, which are placed on the seabed 4 with an accuracy within several meters. Furthermore, not only the anchor 6 is very heavy by itself, but the anchor pastes adhered to the anchor 6 have a weight almost equal to several times the weight of the anchor 6 itself. Also for other objects such as "templates", "elevator bases", "gravity elevator bases", "production distributors" and so on, it is applicable that these objects are placed on the seabed 4 with a relatively high accuracy.

The objects shown in Figure 1 that are required for the exploitation of oil and gas at sea and that have to be placed on the seabed are not only very heavy, but also very expensive. Figure 2 illustrates a ship 20 according to the prior art, having crane means therein, similar to the crane 21. The crane 21 is provided with a crane cable 22 by means of which an object or a load can be placed on the seabed 5. In order to place the load 23 it is necessary to move the surface support together with the crane 21. The result will be that at a certain moment, the inertia of the load 23 will be overcome but due to the acceleration of the load 23, an out-of-control situation will occur where the target area will be exceeded. Due to the fact that the crane cable 22 and the load 4 are susceptible to influences such as current, the load will not move straight when the crane cable is being lowered. The turns of the ship will have a negative influence on the accuracy that can be achieved. In Figure 3 a possible solution according to the prior art is represented, in order to control the position of the load 23 while the crane cable 22 descends. Therefore the load must be secured to an auxiliary cable 31 which is controlled from an auxiliary vessel 31. In addition, the load 23 with the auxiliary cable 32 can be adhered to the ship 20.

It is clear that the load 23 can be placed on the seabed with increased control, due to the solution according to Figure 3. However, it will be clear that the use of the auxiliary vessel 30 will be extremely costly. Figure 4 illustrates a crane ship 40 provided with the apparatus or system for deploying a load 43 on the seabed in accordance with the present invention. The vessel 40 comprises a first crane means, for example a winch 41, provided by a first crane cable 42. By means of this crane cable 42 a load 43, for example a template can be deployed and placed at the bottom of the sea. As mentioned above, the exploitation of oil fields and gas using floating production platforms requires that several heavy objects must be placed on the seabed, in addition these objects have to be placed on the seabed with relatively high accuracy. Due to the fact that at present the exploitation has to be done in depths that amount up to 3000 meters and more, achieving the required accuracy is becoming increasingly difficult. One of the problems that has to be solved is the fact that the crane cables can be twisted. In order to control the position of the load 43 when the load is to be deployed and in order to be able to place the load within the seabed with the required accuracy, the apparatus or system 50 has been secured with the lifting cable 42 A preferred embodiment of the system 50 will be described with reference to Figures 5, 6 and 7. The system 50 is fixed to the end of the hoisting rope 42, for example the crane block 100 (Figure 1 1). Also, the system 50 could be secured directly to the load 43 itself. The system 50 comprises a first or main module 51, provided with driving means such as pushers (Figure 5 and 6). The system further comprises a second or counter module 52. This counter module 52 is also provided with pushers. In use the pushers of the main module 51 and the counter module 52 will be placed at the opposite ends of the hoisting rope 42. The system is connected to the ship 40 by means of a second hoisting rope 45 which can be operated using crane means , for example a second winch 44. The second crane rope 45 for example, is placed on board by means of a structure A 49. The second winch 44 and the second crane rope 45 will normally be lighter than the first crane means 48. and the main crane cable 42 respectively. The system is also connected to the ship by means of an umbilical cord 46, this umbilical cord can be adhered to the crane cable 45 or can be lowered from a tertiary razor 47 separately. The electricity wiring to provide the power to the system 50 is accommodated for example in the umbilical cord. The system 50 generally provides means for converting electric power into hydraulic power. The hydraulic power will consequently be used to control, for example, the pushers, and the auxiliary window. As work is lately being done at increasing depths, the twisted turning of crane cables 42 is becoming an even bigger problem. Because the heavy loads 43 on the lower side of the crane 42 adhere, the twisting of the cable can lead to a relatively large wear on the crane cables, so that very severe damage to the crane cables can occur. This wear can be so severe that the crane cable 42 will break and the load 43 will be lost. Another problem is that due to the huge twists in the cables, the ship's cables can get out of their buckles. Due to the fact that the pushers of the main module 51, and of the counter module 52 respectively are placed on opposite ends of the elevator cable 42, the portion of the counter can be exerted on the crane cable 42 in both directions. In this way an anti-twisted device was formed by means of the system. In order to improve the capacity of this anti-twisting device, preferably, the distance between the main module 51 and the counter module 52 can be altered. Figure 5 illustrates a detailed overview of a possible embodiment of the system 50 for deploying a load on the seabed in accordance with the present invention. Figure 6 illustrates a system according to Figure 5 above.

The system 50 comprises a main module 51, a counter node 52 and an arm 53. The arm can be detachable from the main module 51. This means that the main module 51 can also be used separately (see Figures 9 and 10), as a modular system.

The arm 53 is provided with a step 54. On the opposite sides of this step 54 there are two jaws 57, 58, of which at least one can be moved relative to the other. Between the end surfaces of these jaws 57, 58, an object such as a crane block 100 can be clamped. In order to improve the contact between the jaws 57, 58 and the object, the respective ends of the jaws are accommodated with clamping shoes aligned with a friction element 60, of a high friction material such as a special rubber. As illustrated in Figure 5, the system 50 is provided with the pushers 56, during use those pushers 65 can be used to position the system in relation to the target area. The pushers 56 can be operated from a first position mainly within the system 50, to a position in which the pushers project outside the system 50. In Figure 6, it is illustrated that there are two positions 61, 62 in the part of the main module 51 for connecting the main module to a second lifting cable 45 and / or to the umbilical cord 46. When the main module 51 is used separately (Figures 9 and 10), position 61 can be used. The main module 61 will be balanced when the module 61 is deployed both in the air and under the water. When the system 50 is used, the connection between the ship 40 and the system 50, will be fixed in position 62 in order to maintain equilibrium in the system, both in the air and under the water. In order to improve the balance of the system, an auxiliary weight counter can be secured to the system 50.

The use of the apparatus 50 will have no float in order to improve the mobility of the system under water, the arm 53 is provided with the holes 59 in order to avoid structural damage caused by an increasing pressure while being lowered and for ensure rapid drainage during the recovery phase As mentioned above, it is advantageous when the counter module 52 can be moved relative to the main module 51. This can be done using the jaws 64a. The mounting of the counter module 52 on the arm 53 is illustrated in detail in Figure 7. The operation of the system 50 according to the present invention is as follows: When deploying a load 43 from a ship 40 to the seabed, the cargo will be deployed using a crane wire 42. In order to control the position of the cargo while it is deploying, the system 50 according to the present invention will be secured to crane block 100, about the bottom end thereof. The pushers 56 in the system are operated remotely from the ship 40. The system 50 is provided with sensing means, in order to be able to communicate with the ship 40. When the cargo 43 is not moving in the correct position, the position of the load can be adjusted by activating the pushers 56 in the system 50 in an automatic way. Referring to the present invention, placement is achieved by interfacing between various surface elements and acoustic preference systems by means of a proprietary software design which comprises as a maximum the following combinations while the load is deployed: DGPS (System Global Positioning Differential) SSBL-HiPaP (Baseline Too Short) Doppler Effect and North Search Turn. Further with reference to the present invention, once the load has reached its programmed depth, the placement thereof will be terminated using a High Resolution Sonar Equipment referred to by a distance recording apparatus and at least one fixed object, by means of which, it will then be possible to dissociate the placement activities of the surface support, as well as of any other acoustic answering devices such as LBL (Long Baseline), while the accuracy in the order of centimeters will be achieved within a large radius. It will be appreciated that the apparatus according to the present invention operates free of guide lines. In Figure 8, a possible construction of the main module 51 is illustrated. The module 51 comprises an exterior structure 83 and an interior structure (not shown). The interior structure preferably has the shape of a cylinder. By connecting the outer structure 83 with the inner structure, a very strong construction can be achieved. The resistance of the construction is necessary in order to avoid premature fatigue in the system. The module 55, for example, is made of high voltage steel parts, and is therefore designed to be used as an integral part of the first crane cable 42 or the second crane cable 45. This means that the upper side of the module 51 will be connected to a first part of the crane cable 45, and that the lower part of the module 51 will be connected to a second part of the crane cable 45, or the lower side of the module 51 will be adhered directly to the load. In this way, the load that is in the crane cable will be transferred through the module 51. As mentioned above, the module 51 is provided with means 84 for converting the electrical energy, produced through the umbilical cord 46, into hydraulic power. These conversion means 84 comprising an engine such as a pump, a distributor and a hydraulic container. In order to communicate with an operator on the ship, the module 51 additionally comprises perception means and control means. The module 51 is equipped with a camera / sensor junction box 85 and a light junction box 86. In addition, the module 51 comprises light sources 87, a roll inclinometer sensor 88, a turn 89 and a sonar equipment. 90. The module 51 also accommodates a Doppler unit 91, a Bathy unit 92 and a Pan / Tilt camera 93. On the underside of the module are fixed a dim light unit 94, an altimeter 95 a hydrophone 96 and a camera color with 97 zoom. As mentioned above, the use of high-resolution sonar equipment together with a distance record is important to achieve the required accuracy once the load has reached its programmed depth. The sonar equipment will be used to determine the position with respect to at least one object placed on the seabed. The use of distance recording will then be possible to dissociate the surface support positioning activities, as well as any other acoustic answering devices, such as the LBL (Long Baseline) while the accuracy in the order of centimeters It will be achieved within a large radius. By means of the module 51, the position of the load can be manipulated. As the weight of the anchor chain 42 will be lifted by the first crane means 41 and only a relatively small weight will be transported by the secondary crane cable 45, the freedom of movement of the module 1 is relatively large. That means that regardless of the enormous weight of both the anchor chain 42 and the load 43, the load 43 can be placed with relatively high accuracy at its destination. With reference to drawings 9 and 10, it will be understood that the system can be used either from a crane vessel, or from an anchor handler tug, by means of which, in the case of an AHT support, the primary crane cable will be used to lower the load 42 to the seabed, while the purpose of the secondary cable 45 will be to collect some of the charges through the system thereby creating a "sine" in the main cable and providing an excursion radius in order to place the load in its intended location using only the capacity of the system. The combination of the crane cable 45 and the module 51 allows the tasks, such as the placement of an anchor 43, to be executed with high accuracy by means of vessels much smaller than those currently being used in the prior art.

In Figure 9 an anchor 43 is illustrated, supplied with the anchor chain 42. An anchor chain known in the prior art, for example, has a specific weight of 200 kg per meter. When said chain is being lowered to 2,000 meters, the general weight of the chain is not less than 500 tons. When at the end of the anchor chain an anchor weighing, for example, 75 tons will be attached, the weight of the anchor itself is only a small part of the overall weight of the sum of the anchor and the chain. In Figure 10, the advantages of using the module 51 itself are illustrated in an even clearer manner, for example, in the case that the anchor 43 is placed on the seabed. In the vicinity of the destination, much of the anchor chain 42 is being lowered, and the anchor chain 42 rests on the seabed. Accordingly, the anchor 42 will be raised with a relatively small length of the anchor chain. By means of the module 51 the anchor can then be moved to the required destination. The length of the anchor chain from the anchor to the seabed 4 thus determines the range of action in which the anchor 43 can be placed. In Figure 11, one embodiment of a crane block 100 is illustrated, which could be used with system 50 according to the present invention. Due to the fact that the system 50 makes possible the exact positioning of both the crane block 100 and the load 43, it is also possible to recover objects from the seabed with the system. The presence of cats 57 and 58 was explained above. These jacks 57 and 58 with an alternative crane block 100 could also be used to deploy and recover objects. The crane block 100 is provided with holes therethrough 101 the opposite ends of the block 100. When the crane block is placed on the step 54 of the apparatus 50, the jacks 57 and 58 can be moved through the holes 101. . For example, when an object such as a template 103 is provided with a T-shaped projection the object can be released and retrieved by the moving jacks 57 and 58 through the holes 101. In Figure 12, an embodiment of the module 51 adapted to be used when a coil part is being deployed is illustrated. The module 51 is provided with a ball-shaped hydraulic rotator 120 connected to a hydraulic base structure equipped with the jacks 122. By means of the operation of the jacks 122, any position in the planes of the coil part can be achieved. 123. The system 50 according to the present invention could also be used to connect a flexible lifter 131 to an elevator base. In order to avoid undue stress on the material of the flexible lifter, the system could be provided with a support arm 130 to provide the lower part of the flexible elevator with sufficient rigidity in order to be connected to the base of the elevator. An advantage of the system 50 and the method according to the present invention is that a reduction of the risks associated with the placement of heavy objects is achieved. An additional important advantage is that the preliminary design and manufacture of various parts required for the objects can be performed in a more accurate manner. Therefore, having the reason that there is more certainty about the accuracy that can be achieved, during the placement of objects on the seabed. In the above description several times it was mentioned that the present invention relates to the placement of heavy objects on the seabed. It should be understood that the present invention can be advantageously used also for lifting with a crane or lifting objects from the seabed

Claims (17)

R E I V I N D I C A C I O N S Having described the present invention, it is considered as a novelty and, therefore, the content of the following CLAIMS is claimed as property:

1 .- An apparatus (50) for deploying a load (43) on the seabed (4), the load being coupled to the crane means, such as a crane cable (42) in order to make it possible for the object or cargo (43) are lowered to the seabed from a ship (40), the apparatus (50) comprising a body (53) having means (57, 58) to releasably secure the cargo (43) to the body (53) and propulsion means (56) for moving the body when submerged, the means of propulsion including a first set of pushers, placed eccentrically from the means (57, 58), to releasably secure the load ( 43), characterized in that said apparatus is provided with a sensor (89) to produce data with respect to the orientation of the apparatus and to allow the operation of said pushers of said first set of pushers, to provide a torsion control in order to prevent that the load was flipped (43) without using guide wires.

2. - The apparatus as described in Claim 1, further characterized in that said sensor is a north-turning searcher (89).

3. - The apparatus as described in the Claims 1 or 2, further characterized in that the propulsion means (56), comprise a second set of pushers to provide translation control to said apparatus while said first set of pushers provides said torsion control.

4. - The apparatus as described any of the Previous claims, further characterized in that said first set of pushers comprises a first pusher and a second pusher placed on the opposite ends of the means (57, 58) to releasably secure the object or the load (43), the apparatus being provided with means to adjust the distance between the first and second pushers in order to improve the tension control and minimize the stress cycles in the overall structure.

5. - The apparatus as described in claim 4, further characterized in that the first pusher is placed in a first module (51) and the second pusher is placed in second module (52).

6. - The apparatus as described in Claim 5, further characterized in that the first module (51) is detachably secured to the apparatus.

7. - The apparatus as described in any of the Prior claims, further characterized by the means for removably securing the load comprise hydraulic jacks (57, 58)

8. - The apparatus as described in any of the Prior claims, further characterized in that the means for removably securing the load in the apparatus are provided with adapters designed for that purpose.

9. - The apparatus as described in Claim 8, further characterized in that the adapters are covered with a high friction medium.

10. - The apparatus as described in any of the Prior claims, further characterized in that the pushers can be operated from a first position, mainly inside the apparatus to a position to which the pushers project outside the apparatus.

1 1 .- The device as described in any of the Previous claims, further characterized in that the apparatus is provided with means for transmitting information in the direction of an object on the seabed (4), and with means for receiving a reflection of the signal transmitted to the object and a processor for processing the reflection for establish the position of the device with respect to the object.

12. - The apparatus as described in Claim 1 1, further characterized in that the apparatus is provided with a high resolution sonar equipment interfaced with a distance register.

13. - The use of an appliance in accordance with any of the Prior claims, to deploy a load on the seabed from a ship, which comprises the steps of: • Attach the device to the load (43), which is attached to a first crane cable (42); • Move the load (43) towards the seabed (4), by means of said first crane cable (42); • Exerting a counter-torque to said first crane cable (42) in order to counteract the twisting or turning of the first crane cable during the time when the load (43) is lowered to the seabed (4).

14. - The use as described in claim 13, further characterized in that during the deployment of the load (43), the load (43) is at least partially elevated by means of a second crane cable (45).

15. - The use as described in Claim 13 or 14, characterized in that during the deployment of the load (43), the positioning of the apparatus is achieved using a differential global positioning system (DGPS) connected in interface with a Hydroacoustic Positioning Reference (HPR) system, an apparatus Doppler and an Optical Fiber Gyro.

16. - The use as described in Claims 13, 14 or 15, further characterized in that it comprises the steps of: • Releasing the first crane cable (42), until the first crane cable (42) is at least partially resting on the seabed; • Raise the load (43) and a part of the first crane cable (42) with the crane by means of the second crane cable (45); and • Manipulating the placement of the load (43) by means of said apparatus.

17. - The system comprising an apparatus as described in any of Claims 1 to 12, further characterized in that it comprises a ship (40) being accommodated the ship (40) to remotely operate said apparatus (50).