A riser fixation device

Abstract

The application discloses a riser fixing device, which comprises a main deck and a plurality of riser storage yards formed by stacking a plurality of layers of risers; the riser storage yards are arranged on the main deck, and each riser storage yard is provided with transverse supports on the left and right sides thereof perpendicular to the ship length direction, and a longitudinal riser fixing assembly is arranged at the tail of each riser storage yard; the longitudinal riser fixing assembly comprises a limiting cross beam corresponding to the number of layers of risers, the limiting cross beam is provided with a clamping groove for clamping the riser, and the limiting cross beam is fixed on the transverse supports on the left and right sides through supports. The application effectively solves the problem of slippage of the stored risers caused by the influence of waves, tides and currents during the navigation and operation of the platform. The device can be flexibly disassembled and assembled according to the required number of risers, is used for effectively reinforcing, has a simple and compact structure, saves deck space, and is convenient to install and operate.

Description

Technical Field

[0001] This application relates to a riser fixing device, belonging to the field of marine drilling riser fixing technology. Background Technology

[0002] Human exploration and development of marine oil and gas resources is gradually shifting from shallow waters to deep and ultra-deep waters, making deepwater drilling technology and equipment a key development direction. Riser pipes serve to isolate seawater, providing a channel between the subsea blowout preventer assembly and the drilling platform (or hull) for offshore drilling operations, and are a crucial component of offshore drilling equipment. Riser pipes are typically arranged on offshore floating drilling platforms (or hulls) in three ways: horizontal, vertical, or a combination of horizontal and vertical placement. Horizontal storage of risers effectively lowers the center of gravity of the drilling platform (or hull). Under the influence of wind, waves, and currents, the drilling platform (or hull) will sway during navigation. When sea conditions are severe, the platform (or hull) will experience significant roll and pitch. Since deep-sea exploration and development operations require a large number of risers, the horizontal placement method is adopted. When the ship's hull sways significantly, the riser on top of the storage yard may slip due to the ship's high acceleration and the insufficient friction provided by the external buoyancy material of the riser. Therefore, a solution is needed to address the slippage problem of the top riser in a horizontally laid-out configuration. Summary of the Invention

[0003] The technical problem to be solved by this application is the slippage of the top water-proof pipe when it is laid flat.

[0004] To solve the above-mentioned technical problems, the technical solution of this application is to provide a riser fixing device, including a main deck and a riser stacking yard. The riser stacking yard is formed by stacking multiple layers of risers. Several riser stacking yards are located on the main deck. The riser stacking yards are provided with transverse supports on the left and right sides perpendicular to the hull direction. The riser stacking yards are provided with a longitudinal riser fixing component at the stern. The longitudinal riser fixing component includes a limiting beam corresponding to the number of riser layers. The limiting beam is provided with a slot for locking the riser. The two ends of the limiting beam are fixed to the transverse supports on both sides by supports.

[0005] Preferably, the main deck is provided with a midship section, which divides the main deck into port and starboard sides, with riser storage areas symmetrically distributed on the port and starboard sides.

[0006] Furthermore, there are multiple riser yards located on the port or starboard side. Even further, the transverse support includes the midship section and transverse retaining posts located on both sides of the riser yards away from the midship section. The riser yards away from the midship section bear the transverse loads on both sides of the transverse retaining posts, while the riser yards closer to the midship section bear the transverse loads on both sides of the midship section. Furthermore, the supports include single supports, double supports, and midship supports. Single supports are fixed to the stern of transverse retaining posts with riser yards on only one side; double supports are fixed to the stern of transverse retaining posts with riser yards on both sides; and midship supports are fixed to the stern of the midship section.

[0007] Preferably, the limiting beam and the support are detachably fixed by a support pin.

[0008] Preferably, the limiting beam is located between two adjacent water-proof pipes, and the limiting beam is provided with an upper slot and a lower slot. The upper slot is used to lock the upper water-proof pipe, and the lower slot is used to lock the lower water-proof pipe.

[0009] Furthermore, the slot engages the end flange of the water-sealing pipe.

[0010] Furthermore, the upper and lower sides of the limiting beam are provided with stop ears and horizontal and vertical reinforcing ribs.

[0011] Preferably, the lateral support is provided with multiple lashing lugs along the hull direction, and multiple lashing straps are cross-stitched onto the lashing lugs to secure the riser stack.

[0012] The advantage of this application is that it effectively solves the problem of slippage of stored risers caused by waves and currents during platform navigation and operation. The device can be flexibly assembled and disassembled to effectively reinforce different numbers of risers as needed, and its structure is simple, compact, saves deck space, and is easy to install and operate. Attached Figure Description

[0013] Figure 1 This is a top view of the structure of the riser pipe fixing device;

[0014] Figure 2 A schematic diagram of a riser fixing device used when the riser yard is full;

[0015] Figure 3 Schematic diagram of a riser fixing device used in a riser storage yard that is not full but has more than four layers;

[0016] Figure 4 Schematic diagram of a riser fixing device used when the riser storage yard is not full and is less than five layers high;

[0017] Figure 5-1 , Figure 5-2 , Figure 5-3 , Figure 5-4 This is a schematic diagram of the limiting beam structure;

[0018] Figure 6-1 , Figure 6-2 , Figure 6-3 Three-view diagram of a single support and pin structure;

[0019] Figure 7-1 , Figure 7-2 , Figure 7-3 The diagram shows the double support, pins, and three-view structure.

[0020] Figure 8-1 , Figure 8-2 , Figure 8-3 The three-view diagram shows the ship's midship support and pin structure. Detailed Implementation

[0021] To make this application more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0022] This embodiment provides a water-tight pipe fixing device, see [link to fixing device]. Figure 1 It includes: 1. Main deck, 2. Riser storage area, 3. Transverse support, 4. Single support, 5. Double support, 6. Midship support, 7. Limiting beam, 8. Support pin, 9. Tie lug, 10. Lacing strap.

[0023] A midship section is provided on the main deck 1, which divides the main deck 1 into port and starboard sides. The port and starboard sides are used to arrange the riser storage yard 2 and the transverse bollards 3.

[0024] Riser yard 2 is a yard formed by stacking multiple layers of risers. Riser yard 2 is arranged on the deck. Generally, the yards on the port and starboard sides need to be arranged symmetrically to keep the hull balanced.

[0025] The transverse retaining piles 3 are fixed on both sides of the riser storage yard 2 (in this embodiment, transverse refers to the left and right directions perpendicular to the ship's length) to bear the transverse load of the riser storage yard 2. See also Figure 2 The transverse retaining piles 3 support the riser pipe storage area 2 from the left and right sides. For the riser pipe storage area 2 close to the central body, the side of the riser pipe storage area 2 close to the central body can be supported by the central body, and the transverse retaining piles 3 are no longer required.

[0026] A longitudinal fixing assembly for the riser is installed at the stern (near the stern direction) of the riser storage yard 2. The longitudinal fixing assembly includes a single support 4, a double support 5, a midship support 6, a limiting beam 7, and support pins 8. The single support 4 is fixed to the stern of the transverse retaining pile 3, which has the riser storage yard 2 on only one side. The double support 5 is fixed to the stern of the transverse retaining pile 3, which has the riser storage yard 2 on both sides. The midship support 6 is fixed to the stern of the midship section. The single support 4, double support 5, and midship support 6 are all supports for supporting the limiting beam 7. The two ends of the limiting beam 7 are fixed to the supports. A limiting beam 7 is set for each layer of riser at a higher position in the riser storage yard 2. The limiting beam 7 is provided with upper and lower slots. The upper and lower sides of the limiting beam 7 are provided with stop ears and transverse and longitudinal reinforcing ribs to ensure that it has sufficient strength and rigidity. The limiting beam 7 is located between two adjacent layers of risers. The grooves above and below the limiting beam 7, along with the stop ears, engage the end flanges of the adjacent risers, bearing the longitudinal load of the risers and restricting longitudinal slippage. Placing the limiting beam 7 between adjacent layers of risers avoids interference with various pipelines and connecting bolts on the risers. In this embodiment, it is assumed that the limiting beam 7 must be used for fixing risers if the number of riser layers exceeds five.

[0027] After the two ends of the limiting beam 7 are installed on the supports, they are detachably fixed by the support pins 8 to prevent the limiting beam 7 from detaching from the supports. An appropriate number of limiting beams 7 can be installed according to the actual load of the water-tight pipe. (See [reference]). Figure 2 , Figure 3 and Figure 4 When the number of layers in the storage yard is less than five, it is assumed that the riser will not slip longitudinally, and it is not necessary to use a limiting beam 7 to fix it at the stern. When the number of layers in the storage yard reaches five, a limiting beam 7 needs to be used to fix it at the stern. The slot below the limiting beam 7 holds the fifth layer of riser. The two ends of the limiting beam 7 are fixed to the corresponding transverse retaining pile 3 or the midship through a single support 4, a double support 5 or a midship support 6. Then, the sixth layer of riser is stacked and another limiting beam 7 is added. The sixth layer of riser is held in place by two layers of limiting beams 7. And so on. Each time a layer of riser is added, another layer of limiting beam 7 is added to complete the stacking of the riser.

[0028] When the number of stacked risers is the maximum capacity designed for the storage area, each layer of risers has been fixed with limiting beams 7 and corresponding supports.

[0029] The transverse retaining pile 3 and the middle body are also equipped with multiple tethering lugs 9 along the length of the ship. When loading, the lugs are finally secured to the tethering lugs 9 by multiple lashing straps 10. The lashing straps should be tied after each reinforcement after the riser is stacked, regardless of whether the riser is stacked to the maximum capacity, so as to finally complete the fixation of the riser.

[0030] The riser fixing device provided in this application is used for fixing the risers stored on offshore floating drilling platforms or drilling vessels, effectively solving the problem of riser slippage caused by waves and currents during platform navigation and operation. This device can be flexibly assembled and disassembled to effectively reinforce different numbers of risers as needed, and its structure is simple, compact, saves deck space, and is easy to install and operate.

Claims

1. A water-stop pipe fixing device, characterized in that, Includes a main deck (1) and a riser storage area (2), the riser storage area (2) being formed by stacking multiple layers of risers; several riser storage areas (2) are located on the main deck (1), the riser storage areas (2) are provided with transverse supports on both sides perpendicular to the hull direction, the riser storage area (2) is provided with a longitudinal riser fixing assembly at the stern, the longitudinal riser fixing assembly includes a limiting beam (7) corresponding to the number of riser layers, the limiting beam (7) is provided with a slot for locking the riser, the two ends of the limiting beam (7) are fixed to the transverse supports on both sides by supports; the supports include Includes single support (4), double support (5) and midship support (6). Single support (4) is fixed to the tail of transverse retaining pile (3) with a riser yard (2) on only one side. Double support (5) is fixed to the tail of transverse retaining pile (3) with riser yard (2) on both sides. Midship support (6) is fixed to the stern of the midship. Limiting beam (7) is located between two adjacent riser layers. Limiting beam (7) is provided with upper and lower slots. The upper slot is used to lock the upper riser and the lower slot is used to lock the lower riser. The slots lock the end flanges of the riser.

2. The water-stop pipe fixing device as described in claim 1, characterized in that, The main deck (1) is provided with a midship section, which divides the main deck (1) into port and starboard sides, and the riser storage areas (2) located on the port and starboard sides are symmetrically distributed.

3. The water-stop pipe fixing device as described in claim 2, characterized in that, The riser yard (2) located on the port or starboard side is multiple.

4. The water-stop pipe fixing device as described in claim 3, characterized in that, The lateral support includes the central body and lateral support columns (3) located on both sides of the riser pipe storage area (2) away from the central body. The riser pipe storage area (2) away from the central body is supported by the lateral support columns (3) on the left and right sides, while the riser pipe storage area (2) close to the central body is supported by the central body and the lateral support columns (3).

5. The water-stop pipe fixing device as described in claim 1, characterized in that, The limiting beam (7) and the support are detachably fixed by the support pin (8).

6. The water-stop pipe fixing device as described in claim 1, characterized in that, The limiting beam (7) is provided with stop ears and horizontal and vertical reinforcing ribs on its upper and lower sides.

7. The water-stop pipe fixing device as described in claim 1, characterized in that, The transverse support is provided with multiple tethering lugs (9) along the hull direction, and multiple lashing straps (10) are cross-tied onto the tethering lugs (9) to secure the riser stack (2).

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