An Adaptive Transportation Device for Offshore Jacket and Its Usage Method

Abstract

The present invention relates to the field of jacket transportation, and relates to a transportation device for an adaptive offshore jacket and its usage method; it includes a central separation barge, symmetrically arranged crane mechanisms, and a jacket. The present invention is provided with a central separation barge including a left hull and a right hull that are relatively abutted and connected by a connecting telescopic rod, and crane mechanisms symmetrically installed on the central separation barge. The crane mechanisms are used to pull and fix the jacket. At the same time, when carrying out offshore hoisting, through the back-to-back movement of the left hull and the right hull of the central separation barge, and then the crane mechanisms are used for vertical hoisting to vertically lower the jacket from the middle gap between the left hull and the right hull, without the need for attitude adjustment when the jacket enters the sea. At the same time, it is convenient for the quick positioning between the jacket and the drilling, improves the installation efficiency of the jacket, and reduces the transportation and installation steps of the jacket.

Description

Technical Field

[0001] The present invention relates to the field of jacket transportation, and more specifically, to a transportation device for an adaptive offshore jacket and a method for using the same. Background Art

[0002] A jacket is composed of hollow leg columns and horizontal and vertical bars connecting the leg columns. The steel piles of the jacket are fixed to the seabed. After the jacket is prefabricated on land, it is towed to the sea for installation. Then, piles are driven along the conduits, and the piles are driven one section at a time. Finally, cement slurry is poured into the annular space between the piles and the conduits to connect the piles and the conduits into one body and fix them to the seabed.

[0003] Traditional jacket transportation uses a water barge method of towing by a barge or a self-floating towing method using pontoons or enclosed self-floating means for offshore transportation. After the above transportation methods are towed in place, they all need to be hoisted and flipped at sea to adjust the attitude of the jacket, so that the jacket is adjusted from the horizontal state during transportation to the vertical state during installation. During the adjustment process, it is necessary to adjust by contacting a floating crane, pontoons or injecting water inside. During the adjustment process, it is also necessary to continuously align with the pre-installation position of the drilling, which is cumbersome and takes a long time to adjust. Summary of the Invention

[0004] 1. Technical Problems to be Solved

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a transportation device for an adaptive offshore jacket and a method for using the same, which can realize the vertical sea-entry hoisting of the jacket, without the need for flipping and adjustment after entering the sea, facilitating quick positioning and improving the installation efficiency.

[0006] 2. Technical Solutions

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A transportation device for an adaptive offshore jacket includes a central split barge, a crane mechanism symmetrically arranged on the central split barge, and a jacket placed in the middle of the central split barge and connected to the crane mechanism; the central split barge includes a left hull and a right hull symmetrically arranged and with their inner sides abutting against each other, and a separation drive mechanism for driving the left hull and the right hull to separate and merge; the separation drive mechanism includes a set of connecting telescopic rods symmetrically arranged front and back, fixedly connected to the inner end of the right hull and extending into the left hull, a rack plate nested in the connecting telescopic rod, a driving gear arranged on the inner cavity of the left hull near the right hull, and a power mechanism for driving the driving gear to rotate; the crane mechanism includes a lasso connected to the jacket, a traction steel cable connected to the lasso, a support frame that provides support for the traction steel cable through a pulley group and is fixedly connected to the central split barge, and a winding mechanism connected to the winding end of the traction steel cable and fixedly connected to the central split barge.

[0009] Further, the power mechanism includes a vertical shaft fixedly connected to the driving gear and rotatably connected to the inner wall of the left hull, a worm gear sleeved on the vertical shaft, a worm meshing with the worm gear, and a marine power mechanism connected to the worm.

[0010] Further, four groups of crane mechanisms are provided at the four corners of the central separation type barge.

[0011] Further, the left hull and the right hull have the same structure and are symmetrically distributed.

[0012] Further, the connecting telescopic rod is a box girder structure with a rectangular cross-section.

[0013] Further, the connecting telescopic rod is fixed to the inner end face of the right hull by welding or bolt connection.

[0014] Further, a rectangular through hole for the connecting telescopic rod to pass through is provided on the inner end face of the left hull.

[0015] Further, a limiting plate is fixedly connected inside the left hull, sleeved on the outside of the connecting telescopic rod and slidably connected to the connecting telescopic rod. The limiting plate is provided with a through hole for the connecting telescopic rod to pass through.

[0016] Further, the winding mechanism includes a winding drum for winding the towing steel cable and a winding motor for driving the winding drum to rotate.

[0017] A usage method of a transport device for an adaptive offshore jacket includes the following steps:

[0018] Step 1: Use the dock crane at the dock to hoist the jacket to the middle of the central separation type barge, then set the lasso of the crane mechanism on the upper part of the jacket, start the winding mechanism to keep the towing steel cable in a tensioned state, and fix the jacket on the central separation type barge;

[0019] Step 2: Use a tugboat to tow the central separation type barge to above the drilling well;

[0020] Step 3: Start the power mechanism. The power mechanism drives the driving gear to rotate, and the driving gear drives the connecting telescopic rod to extend out of the left hull, so that the left hull and the right hull move away from each other in the opposite direction. At this time, due to the separation of the left hull and the right hull, the towing steel cable completely hoists the jacket through the lasso. When the gap between the left hull and the right hull is larger than the vertical projection area of the jacket, turn off the power mechanism;

[0021] Step 4: Start the tugboat to adjust and align the relative position of the central separation type barge and the drilling well;

[0022] Step 5: Start the winding mechanism to release the towing steel cable, so that the jacket falls vertically to complete the offshore hoisting of the jacket.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the advantages of the present invention are as follows:

[0025] (1) The present invention is provided with a central separation barge including a left hull and a right hull that are relatively abutted and connected by a connecting telescopic rod, and a crane mechanism symmetrically installed on the central separation barge. The crane mechanism is used to pull and fix the jacket. At the same time, when carrying out the offshore hoisting, through the back-and-forth movement of the left hull and the right hull of the central separation barge, and then the crane mechanism is used for vertical hoisting to vertically lower the jacket from the middle gap between the left hull and the right hull. There is no need to adjust the attitude of the jacket when it enters the sea. At the same time, it is convenient for the quick positioning between the jacket and the drilling, improves the installation efficiency of the jacket, and reduces the transportation and installation steps of the jacket.

[0026] (2) The present invention is provided with a left hull, a right hull, a connecting telescopic rod, a rack plate nested in the connecting telescopic rod, a driving gear installed in the left hull, and a power mechanism for driving the driving gear. The power mechanism drives the driving gear to rotate, and then the driving gear drives the rack plate and the connecting telescopic rod to move. The connecting telescopic rod pushes the right hull to separate from the left hull, realizing the efficient separation of the right hull and the left hull, and facilitating the vertical hoisting of the jacket in the gap between the right hull and the left hull.

[0027] (3) The present invention is provided with a connecting telescopic rod with a box girder structure having a square cross-section, so that the connecting telescopic rod has good torsional resistance, is convenient for offshore construction, and enables the right hull and the left hull to have good connection stability after separation, improving the stability of hoisting and installation.

[0028] (4) The present invention is provided with a crane mechanism that is symmetrically arranged in pairs and distributed at four corners on the central separation barge, so that the crane mechanism has a good traction and fixing effect on the jacket. At the same time, it has the stability of maintaining vertical hoisting, improving the stability of hoisting and the accuracy of positioning.

[0029] (5) The use method of the disclosed adaptive offshore jacket transportation device of the present invention does not require attitude adjustment of the jacket after it is transported in place, is convenient for quick positioning and vertical hoisting of the jacket. Compared with the traditional transportation method of the jacket, it simplifies the transportation steps and improves the positioning efficiency and hoisting efficiency. Brief description of the drawings

[0030] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0031] Figure 2 is a transverse cross-sectional structural schematic diagram of the present invention;

[0032] Figure 3 Schematic diagram of the separated state of the left hull and the right hull in the present invention;

[0033] Figure 4 Schematic diagram of the internal structure of the central separation barge in the present invention;

[0034] Figure 5 It is Figure 4 Enlarged structural schematic diagram at position A in

[0035] Figure 6 Schematic diagram of the mechanism of the power mechanism in the present invention;

[0036] Figure 7 Schematic three-dimensional structure diagram of the connecting telescopic rod in the present invention;

[0037] Figure 8 Schematic three-dimensional structure diagram of the limit plate in the present invention;

[0038] Figure 9 Schematic distribution structure diagram of the crane mechanism in the present invention;

[0039] Figure 10 Schematic structure diagram of the crane mechanism in the present invention.

[0040] Explanation of the reference numerals in the figure: 1. Central separation barge; 101. Left hull; 102. Right hull; 2. Crane mechanism; 3. Jacket; 4. Connecting telescopic rod; 5. Rack plate; 6. Driving gear; 7. Vertical shaft; 8. Worm gear; 9. Worm; 10. Marine power mechanism; 11. Limit plate; 12. Lasso; 13. Towing steel cable; 14. Support frame; 15. Winding mechanism. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0044] Please refer to Figures 1-10 , in an embodiment of the present invention, a transportation device for an adaptive offshore jacket includes a central split barge 1, a crane mechanism 2 symmetrically arranged on the central split barge 1, and a jacket 3 placed in the middle of the central split barge 1 and connected to the crane mechanism 2;

[0045] Among them, the central split barge 1 includes a left hull 101 and a right hull 102 that are symmetrically arranged and whose inner sides are in mutual contact, and a separation drive mechanism for driving the separation and combination of the left hull 101 and the right hull 102; the separation drive mechanism includes a set of connecting telescopic rods 4 that are symmetrically arranged front and back, fixedly connected to the inner end of the right hull 102 and extending into the left hull 101, a rack plate 5 nested in the connecting telescopic rod 4, a driving gear 6 arranged on the inner cavity of the left hull 101 close to the right hull 102 side, and a power mechanism for driving the driving gear 6 to rotate;

[0046] It should be noted that the power mechanism includes a vertical shaft 7 fixedly connected to the driving gear 6 and rotatably connected to the inner wall of the left hull 101, a worm gear 8 sleeved on the vertical shaft 7, a worm 9 meshing with the worm gear 8, and a marine power mechanism 10 connected to the worm 9.

[0047] Among them, the crane mechanism 2 includes a lasso 12 connected to the jacket 3, a towing steel cable 13 connected to the lasso 12, a support frame 14 that provides support for the towing steel cable 13 through a pulley group and is fixedly connected to the central split barge 1, and a winding mechanism 15 connected to the winding end of the towing steel cable 13 and fixedly connected to the central split barge 1.

[0048] Specifically, when transporting the jacket 3, the jacket 3 is hoisted onto the central split barge 1 by a quay crane, the lasso 12 is sleeved on the upper part of the jacket 3, and then a tugboat is used to tow the central split barge 1 to the drilling position. Then, the left hull 101 and the right hull 102 of the central split barge 1 are separated, and then the towing steel cable 13 is released so that the jacket 3 is vertically hoisted downward from the gap between the left hull 101 and the right hull 102.

[0049] In this embodiment, the left hull 101 and the right hull 102 have the same structure and are symmetrically distributed.

[0050] In this embodiment, the connecting telescopic rod 4 is fixed to the inner end face of the right hull 102 by welding or bolt connection.

[0051] In this embodiment, a rectangular through hole for the connecting telescopic rod 4 to pass through is provided on the inner end face of the left hull 101.

[0052] In this embodiment, a limiting plate 11 sleeved on the outer side of the connecting telescopic rod 4 and slidably connected to the connecting telescopic rod 4 is fixedly connected inside the left hull 101, and the limiting plate 11 is provided with a through hole for the connecting telescopic rod 4 to pass through.

[0053] Specifically, it enables the connecting telescopic rod 4 to have better stability during movement.

[0054] In this embodiment, the connecting telescopic rod 4 has a box girder structure with a rectangular cross-section.

[0055] Specifically, the connecting telescopic rod 4 with a box girder structure has better torsional resistance, which is convenient for connecting the left hull 101 and the right hull 102 under sea wave conditions, making the center-separated barge 1 have better integrity and stability.

[0056] In another embodiment of the present invention, four groups of crane mechanisms are provided on the center-separated barge 1 and are distributed at the four corners.

[0057] In this embodiment, the winding mechanism 15 includes a winding drum for winding the towing cable 13 and a winding motor for driving the winding drum to rotate.

[0058] During use, the winding mechanisms 15 of the crane mechanisms 2 distributed at the four corners wind and release the towing cable 13 to realize the towing fixation and vertical hoisting of the jacket 3.

[0059] In another embodiment of the present invention, a method for using a transportation device for an adaptive offshore jacket includes the following steps: Step 1, use a dock crane at the dock to hoist the jacket 3 to the middle of the central separation barge 1, then set the noose 12 of the crane mechanism 2 on the upper part of the jacket 3, start the winding mechanism 15 to keep the towing steel cable 13 in a tensioned state, and fix the jacket 3 on the central separation barge 1; Step 2, use a tugboat to tow the central separation barge 1 to above the drilling well; Step 3, start the power mechanism, the power mechanism drives the driving gear 6 to rotate, the driving gear 6 drives the connecting telescopic rod 4 to extend out of the left hull 101, so that the left hull 101 and the right hull 102 move away from each other in the opposite direction. At this time, since the left hull 101 and the right hull 102 are separated, the towing steel cable 13 completely hoists the jacket 3 through the noose 12. When the gap between the left hull 101 and the right hull 102 is greater than the vertical projection area of the jacket 3, turn off the power mechanism; Step 4, start the tugboat to adjust and align the relative position of the central separation barge 1 and the drilling well; Step 5, start the winding mechanism 15 to release the towing steel cable 13, so that the jacket 3 falls vertically, and complete the offshore hoisting of the jacket 3.

[0060] Specifically, when using the method for using a transportation device for an adaptive offshore jacket to transport the jacket 3, during the fixing, transportation, positioning, and hoisting processes of the jacket, there is no need to change the vertical posture of the jacket. Compared with the traditional transportation method, the transportation efficiency and the positioning and hoisting efficiency at the drilling position are improved.

[0061] The above is only the preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An adaptive transportation device for offshore jacket platforms, characterized in that, it includes a central split barge (1), a crane mechanism (2) symmetrically arranged on the central split barge (1), and a jacket platform (3) placed in the middle of the central split barge (1) and connected to the crane mechanism (2); there are four groups of crane mechanisms (2) distributed at the four corners on the central split barge (1); the central split barge (1) includes a left hull (101) and a right hull (102) that are symmetrically arranged and whose inner sides are in contact with each other, and a separation drive mechanism for driving the separation and combination of the left hull (101) and the right hull (102); the left hull (101) and the right hull (102) have the same structure and are symmetrically distributed; the separation drive mechanism includes a set of connecting telescopic rods (4) that are symmetrically arranged front and back, fixedly connected to the inner end of the right hull (102) and extending into the left hull (101), a rack plate (5) nested in the connecting telescopic rod (4), a driving gear (6) arranged on the inner cavity of the left hull (101) close to the side of the right hull (102), and a power mechanism for driving the driving gear (6) to rotate; the power mechanism includes a vertical shaft (7) fixedly connected to the driving gear (6) and rotatably connected to the inner wall of the left hull (101), a worm gear (8) sleeved on the vertical shaft (7), a worm (9) meshed with the worm gear (8), and a marine power mechanism (10) connected to the worm (9); the crane mechanism (2) includes a lasso (12) connected to the jacket platform (3), a towing steel cable (13) connected to the lasso (12), a support frame (14) that provides support for the towing steel cable (13) through a pulley group and is fixedly connected to the central split barge (1), and a winding mechanism (15) connected to the winding end of the towing steel cable (13) and fixedly connected to the central split barge (1).

2. The adaptive transportation device for offshore jacket platforms according to claim 1, characterized in that, the connecting telescopic rod (4) is a box girder structure with a rectangular cross-section.

3. The adaptive transportation device for offshore jacket platforms according to claim 1, characterized in that, the connecting telescopic rod (4) is fixed to the inner end face of the right hull (102) by welding or bolt connection.

4. The adaptive transportation device for offshore jacket platforms according to claim 3, characterized in that, the inner end face of the left hull (101) is provided with a rectangular through hole for the connecting telescopic rod (4) to pass through.

5. The adaptive transportation device for offshore jacket platforms according to claim 4, characterized in that, a limiting plate (11) fixedly connected to the left hull (101) and sleeved on the outside of the connecting telescopic rod (4) and slidably connected to the connecting telescopic rod (4) is provided, and the limiting plate (11) is provided with a through hole for the connecting telescopic rod (4) to pass through.

6. The adaptive transportation device for offshore jacket platforms according to claim 1, characterized in that, the winding mechanism (15) includes a winding drum for winding the towing steel cable (13) and a winding motor for driving the winding drum to rotate.

7. A method for transporting a jacket using the transport device for an adaptive offshore jacket according to any one of claims 1-6, characterized in that, the method comprises the following steps: Step 1, at the dock, use the dock crane to hoist the jacket (3) to the middle of the center-separable barge (1), then set the lasso (12) of the crane mechanism (2) on the upper part of the jacket (3), start the winding mechanism (15) to keep the towing steel cable (13) in a tensioned state, and fix the jacket (3) on the center-separable barge (1); Step 2, use a tugboat to tow the center-separable barge (1) to move above the drilling well; Step 3, start the power mechanism, the power mechanism drives the driving gear (6) to rotate, the driving gear (6) drives the connecting telescopic rod (4) to extend from the left hull (101), so that the left hull (101) and the right hull (102) move away from each other in a reverse direction. At this time, due to the separation of the left hull (101) and the right hull (102), the towing steel cable (13) completely hoists the jacket (3) through the lasso (12). When the gap between the left hull (101) and the right hull (102) is greater than the vertical projection area of the jacket (3), turn off the power mechanism; Step 4, start the tugboat to adjust and align the relative position of the center-separable barge (1) and the drilling well; Step 5, start the winding mechanism (15) to release the towing steel cable (13), so that the jacket (3) falls vertically to complete the offshore hoisting of the jacket (3).

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