A trestle device suitable for mobile heat injection platform

Abstract

The present invention discloses a trestle device suitable for a mobile heat injection platform. The trestle device is disposed between a development wellhead platform and a platform body, and is used to connect the heavy oil development wellhead platform and the platform body. The trestle device comprises a trestle body, a trestle support platform disposed on the heavy oil development wellhead platform, and trestle retractable support devices and a trestle parking frame disposed at both ends of the platform body on a side opposite to the heavy oil development wellhead platform. When the trestle body is in a state connecting the platform body and the heavy oil development wellhead platform, the trestle body spans between the trestle retractable support device of the platform body and the heavy oil development wellhead platform. When the trestle body is in a retracted state, the trestle body spans over the trestle retractable support device and the trestle parking frame. The trestle device for a mobile heat injection platform disclosed by the present invention can be widely used in offshore heavy oil development, significantly reducing the cost of offshore heavy oil field development.

Description

Technical Field

[0001] The invention relates to the technical field of offshore oilfield exploitation, and in particular to a trestle device suitable for a mobile heat injection platform. Background Art

[0002] my country's Bohai Sea region boasts numerous proven heavy oil reservoirs, but their distribution is highly fragmented, with each field containing relatively small reserves, making them uneconomical for large-scale development. Traditional offshore trestle structures cannot accommodate large relative movements, and their deployment and retraction require the use of floating cranes. For mobile heat injection platforms, which frequently need to be moved between different heavy oil fields, deploying and retracting the trestle is a high-frequency operation. Existing methods using floating cranes would be prohibitively expensive, significantly increasing oilfield development costs. Summary of the Invention

[0003] The object of the present invention is to provide a trestle device suitable for a mobile heat injection platform, so as to solve the problem of high investment in the existing trestle retrieval and deployment method using floating crane resources.

[0004] The present invention provides a trestle device suitable for a mobile heat injection platform, which is arranged between a development wellhead platform and a platform body and is used to connect the heavy oil development wellhead platform and the platform body. The trestle device comprises a trestle body, and a trestle support platform is arranged on the heavy oil development wellhead platform; two ends of the platform body on a side opposite to the heavy oil development wellhead platform are respectively provided with a trestle retractable support device and a trestle parking frame. When the trestle body is in a state of connecting the platform body and the heavy oil development wellhead platform, the trestle body spans between the trestle retractable support device of the platform body and the heavy oil development wellhead platform; when the trestle body is in a retracted state, the trestle body spans over the trestle retractable support device and the trestle parking frame.

[0005] Preferably, the pier retraction and extension support device includes a pier rotating platform, which can be rotated in a horizontal plane; the proximal end of the pier body is hinged to the pier rotating platform through a hinged column; a pier retraction and extension fixing frame is provided on the pier rotating platform, and the pier body away from the proximal end of the pier body and the top of the pier retraction and extension fixing frame are pulled by a rope; the pier retraction and extension support device can realize the up and down rotation of the pier body along the hinged column in a vertical plane through the retraction and extension rope.

[0006] Preferably, the trestle rotating platform is provided with a trestle passage.

[0007] Preferably, the trestle support platform includes a trestle support platform deck, the lower bottom surface of the trestle support platform deck is provided with a trestle support platform rotating pier, the upper part of the trestle support platform rotating pier is connected to the trestle support platform deck through a rotating bearing, the trestle support platform deck can rotate around the trestle support platform rotating pier, and the lower part of the trestle support platform rotating pier is welded and fixed to the heavy oil development wellhead platform; the upper surface of the trestle support platform deck is provided with a trestle limiting structure, the trestle main body is erected on the trestle support platform deck and is located on the outside of the trestle limiting structure; wherein, the trestle support platform deck is used to support the trestle main body, and the trestle limiting structure is used to limit the trestle main body to slide back and forth only along the length direction of the trestle main body; the trestle support platform rotating pier is used to make the trestle support platform deck rotate in the horizontal direction.

[0008] Preferably, the trestle parking rack includes a parking rack body, the bottom end of the parking rack body is welded and fixed to the platform body, and a trestle parking rack pad is provided in the middle of the top of the parking rack body for placing the recovered trestle body; a trestle parking rack rotating clamping device is provided on the parking rack body around the trestle parking rack pad.

[0009] Preferably, the trestle parking frame rotation clamping device is equipped with a built-in pin structure, which can rotate horizontally; when the pin structure rotates inward, it can clamp the trestle body to ensure that the trestle body is in a stable state during towing; before lifting and connecting the trestle body, the pin structure rotates outward, and the trestle body can be lifted normally.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] (1) The present invention discloses a trestle device suitable for a mobile heat injection platform. The trestle retractable support device can realize not only the lifting and lowering of the trestle body by retracting and extending the rope, but also the up and down rotation of the trestle body along the hinged column in the vertical plane, thereby realizing the simple connection and recovery of the trestle. There is no need to use floating crane resources, and the trestle can be easily retracted and extended. It can not only well meet the connection requirements between the mobile heat injection platform and the fixed platform, but also reduce the engineering development cost of a single heavy oil field, and significantly shorten the construction time and cost of the platform's offshore installation. The trestle device suitable for a mobile heat injection platform disclosed by the present invention can be widely used in offshore heavy oil development, greatly reducing the cost of offshore heavy oil field development.

[0012] (2) The present invention discloses a trestle device suitable for a mobile heat injection platform. By adopting the mobile heat injection platform, the heavy oil thermal recovery equipment is set on the movable platform. The movable platform can be self-installed. The trestle can adapt to relative rotation and sliding between the mobile heat injection platform end and the fixed platform end, thereby being able to adapt to larger relative displacement between the mobile heat injection platform and the fixed platform. At the same time, it can be reused in sea areas with similar environmental conditions to achieve common utilization of multiple heavy oil fields.

[0013] (3) The present invention discloses a trestle device suitable for a mobile heat injection platform, wherein the mobile heat injection platform is connected to a fixed platform via a trestle, and a pipeline corridor and a personnel passage are provided on the trestle for supporting steam pipelines and other process pipelines, cables, etc., which not only transports high-temperature and high-pressure steam from the mobile heat injection platform to the fixed platform, but also enables personnel to travel back and forth between the two platforms via the trestle, thereby facilitating the transportation of personnel between the mobile platform and the fixed platform.

[0014] (4) The present invention discloses a trestle device suitable for a mobile heat injection platform. The trestle can be supported and fixed by a parking frame at the end of the mobile heat injection platform, so that it can be conveniently towed and migrated at sea together with the mobile heat injection platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A side view of the mobile heat injection platform provided in Example 1 of the present invention;

[0016] Figure 2 A top view of the mobile heat injection platform provided in Example 1 of the present invention;

[0017] Figure 3 A side view of the trestle device provided in Example 1 of the present invention connected between the platform body and the heavy oil development wellhead platform;

[0018] Figure 4 A schematic diagram of the structure of the connection between the trestle main body and the trestle retractable support device provided in Example 1 of the present invention;

[0019] Figure 5 An axonometric view of the trestle support platform provided in Example 1 of the present invention;

[0020] Figure 6 A side view of the trestle support platform provided in Example 1 of the present invention;

[0021] Figure 7 A top view of the trestle support platform provided in Example 1 of the present invention;

[0022] Figure 8 This is a schematic structural diagram of the trestle parking rack provided in Example 1 of the present invention.

[0023] Explanation of the accompanying reference numerals: 100 - platform body, 101 - pile legs, 102 - pile shoes, 103 - heavy oil thermal recovery equipment, 104 - lifting system; 2 - trestle body; 21 - trestle parking frame, 211 - parking frame body, 212 - trestle parking frame pad, 213 - trestle parking frame rotation clamping device; 22 - trestle retractable support device, 221 - trestle rotating platform, 222 - trestle retractable fixing frame, 223 - hinged column, 224 - rope, 225 - trestle access ladder; 3 - heavy oil development wellhead platform, 31 - trestle support platform, 310 - trestle support platform deck; 311 - trestle support platform rotation pier; 312 - trestle limiting structure. DETAILED DESCRIPTION

[0024] The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0025] In order to solve the problem of high investment in the existing trestle retraction and deployment method relying on floating crane resources, the present invention discloses a trestle device suitable for a mobile heat injection platform. When the trestle body 2 is in a connected state, one end of the trestle body 2 is connected to the trestle retraction and deployment support device 22, and the other end is placed on the trestle support platform 31; when the trestle body 2 is in a retracted state, one end of the trestle body 2 is connected to the trestle retraction and deployment support device 22, and the other end is placed on the trestle parking frame 21. There is no need to use floating crane resources, and the trestle can be easily retracted and deployed, and can adapt to the relative movement between larger platforms. It is not only well suited to the connection requirements between the mobile heat injection platform and the fixed platform, but also greatly shortens the construction time and cost of the platform's offshore installation.

[0026] Example 1

[0027] Example 1 provides a mobile heat injection platform, and its structure is described in detail below.

[0028] refer to Figure 1 and Figure 2 The mobile heat injection platform includes a platform body 100,

[0029] The platform body 100 is a box-shaped structure;

[0030] The platform body 100 is supported by at least three pile legs 101 below, and pile shoes 102 are provided at the bottom of the pile legs 101;

[0031] The platform body 100 is provided with a main deck, and the main deck is provided with a heavy oil thermal recovery device 103.

[0032] The upper portion of the pile legs 101 extends into the main deck, and a lifting system 104 is provided on the pile legs 101 inside the main deck.

[0033] The heavy oil thermal recovery equipment 103 on the platform body 100 is connected to the pile legs 101 through a lifting system 104, forming the main support structure of the entire mobile heat injection platform.

[0034] After being lowered, the platform body 100 provides buoyancy for the entire platform, and the entire platform can be moved between different heavy oil fields without the help of large floating crane resources.

[0035] During the lowering process of the platform body 100 , the pile shoe 102 contacts the seabed and gradually penetrates into the seabed mud, and finally stays in the bearing layer to provide basic support for the entire mobile heat injection platform.

[0036] Before the platform body 100 is towed, the pile shoes 102 are stowed as the pile legs 101 are lifted.

[0037] The lifting system 104 controls the lifting and lowering of the four legs 101 for self-lifting installation of the mobile heat injection platform.

[0038] Furthermore, the mobile heat injection platform is equipped with a heavy oil development wellhead platform 3 , which is a fixed platform. The heavy oil development wellhead platform 3 is connected to the platform body 100 via a trestle device.

[0039] Example 2

[0040] Example 2 provides a trestle device, which is suitable for the mobile heat injection platform in Example 1. The structure of the trestle device is described in detail below with reference to the accompanying drawings.

[0041] refer to Figure 3 The trestle device is arranged between the development wellhead platform 300 and the platform body 100, and is used to connect the heavy oil development wellhead platform 3 with the platform body 100, and includes a trestle body 2,

[0042] The heavy oil development wellhead platform 3 is provided with a trestle support platform 31;

[0043] The two ends of the platform body 100 on the side opposite to the heavy oil development wellhead platform 3 are respectively provided with a trestle retracting and extending support device 22 and a trestle parking frame 21. Figure 2 As shown;

[0044] When the trestle body 2 is in a state of connecting the platform body 100 and the heavy oil development wellhead platform 3, the trestle body 2 spans between the trestle retractable support device 22 of the platform body 100 and the heavy oil development wellhead platform 3; when the trestle body 2 is in a retracted state, the trestle body 2 spans over the trestle retractable support device 22 and the trestle parking frame 21.

[0045] Specifically, the trestle body 2 is a typical truss structure, on which a pipeline corridor is provided for supporting steam pipelines and other process and cable cables, etc., and a personnel passage is provided for personnel to pass back and forth.

[0046] The pier parking frame 21 on the platform body 100 can support and fix the pier after the pier is recovered, so as to facilitate the towing and migration of the pier along with the platform body 100 at sea.

[0047] refer to Figure 4 The trestle retractable support device 22 includes a trestle rotating platform 221.

[0048] The trestle rotating platform 221 is a prior art, which has built-in bearings and motors and can achieve rotation in the horizontal plane;

[0049] The proximal end of the trestle body 2 is hinged to the trestle rotating platform 221 via a hinge column 223;

[0050] The proximal end of the pier body 2 refers to the end close to the pier rotating platform 221 .

[0051] A trestle retractable fixing frame 222 is provided on the trestle rotating platform 221 , and the trestle body 2 away from the proximal end of the trestle body 2 and the top end of the trestle retractable fixing frame 222 are pulled by a rope 224 .

[0052] The pier retractable support device 22 can not only realize the lifting and lowering of the pier body 2, but also realize the up and down rotation of the pier body 2 along the hinge column 223 in the vertical plane through the retractable rope 224, thereby realizing the simple connection and recovery of the pier without calling on offshore floating crane resources.

[0053] The trestle retractable support device 22 on the platform body 100 can realize the connection and recovery of the trestle body 2 by relying on its own power, and has two degrees of freedom support, and the trestle body 2 can rotate in the horizontal plane and rise and fall in the vertical plane.

[0054] In order to facilitate operators to enter the trestle rotating platform 221 for operation, the trestle rotating platform 221 is equipped with a trestle passage 225.

[0055] refer to Figures 5 to 7 The trestle support platform 31 includes a trestle support platform plate 310.

[0056] The lower bottom surface of the trestle support platform plate 310 is provided with a trestle support platform rotating pier 311.

[0057] The upper part of the trestle support platform rotating buttress 311 is connected to the trestle support platform deck 310 through a rotating bearing. The trestle support platform deck 310 can rotate around the trestle support platform rotating buttress 311. The lower part of the trestle support platform rotating buttress 311 is welded and fixed to the heavy oil development wellhead platform 3.

[0058] The upper surface of the trestle support platform board 310 is provided with a trestle limiting structure 312, and the trestle body 2 is set on the trestle support platform board 310 and is located outside the trestle limiting structure 312;

[0059] Wherein, the trestle support platform board 310 is used to support the trestle body 2;

[0060] The trestle limiting structure 312 can limit the trestle body 2 to only be able to move relative to the trestle limiting structure 312 along the length direction of the trestle body 2, that is, the trestle limiting structure 312 is used to limit the trestle body 2 to only be able to slide forward and backward along the length direction of the trestle body 2;

[0061] The pier support platform rotating pier 311 is used to rotate the pier support platform deck 310 in a horizontal direction.

[0062] The heavy oil development wellhead platform 3 is connected to the heavy oil development wellhead platform 3 through the trestle device, and the heavy oil development wellhead platform 3 can realize the relative movement of the trestle device and the heavy oil development wellhead platform 3 in the length direction of the trestle body 2, and can realize the relative rotation between the support platform and the heavy oil development wellhead platform 3 in the horizontal plane.

[0063] The trestle support platform 31 can adapt to the relative displacement in the axial and rotational directions between the trestle body 2 and the heavy oil development wellhead platform 3, so that the trestle support platform 31 can adapt to various movements of the trestle body 2 in the horizontal plane and meet the larger horizontal relative displacement requirements between the platform body 100 and the heavy oil development wellhead platform 3.

[0064] refer to Figure 8 The trestle parking frame 21 includes a parking frame body 211, a trestle parking frame pad 212, and a trestle parking frame rotating clamping device 213.

[0065] The bottom end of the parking frame body 211 is welded and fixed to the platform body 100, and a trestle parking frame pad 212 is provided in the middle of the top of the parking frame body 211 for placing the recovered trestle body 2;

[0066] A trestle parking frame rotation clamping device 213 is provided on the parking frame body 211 around the trestle parking frame pad 212 .

[0067] Specifically, the pier parking frame rotation clamping device 213 is equipped with a built-in pin structure, which can rotate horizontally; when the pin structure rotates inward, it can clamp the pier body 2, ensuring that the pier body 2 is in a stable state during towing; before lifting and connecting the pier body 2, the pin structure rotates outward, and the pier body 2 can be lifted normally.

[0068] By rotating the latch structure of the clamping device 213 of the rotating trestle parking frame, the trestle device can be released and locked simply and quickly, which is convenient for limiting and fixing the trestle device during towing at sea.

[0069] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A trestle device suitable for a mobile heat injection platform, arranged between a heavy oil development wellhead platform (3) and a platform body (100), for connecting the heavy oil development wellhead platform (3) and the platform body (100), characterized in that: It includes a trestle main body (2), The heavy oil development wellhead platform (3) is provided with a trestle support platform (31), the trestle support platform (31) includes a trestle support platform plate (310), the lower bottom surface of the trestle support platform plate (310) is provided with a trestle support platform rotating pier (311), the upper part of the trestle support platform rotating pier (311) is connected to the trestle support platform plate (310) through a rotating bearing, the trestle support platform plate (310) can rotate around the trestle support platform rotating pier (311), and the lower part of the trestle support platform rotating pier (311) is welded and fixed to the heavy oil development wellhead platform. On the wellhead platform (3); the upper surface of the trestle support platform plate (310) is provided with a trestle limiting structure (312); the trestle body (2) is erected on the trestle support platform plate (310) and is located outside the trestle limiting structure (312); wherein the trestle support platform plate (310) is used to support the trestle body (2), and the trestle limiting structure (312) is used to limit the trestle body (2) to only slide forward and backward along the length direction of the trestle body (2); the trestle support platform rotating pier (311) is used to allow the trestle support platform plate (310) to rotate in the horizontal direction; The two ends of the platform body (100) on the side opposite to the heavy oil development wellhead platform (3) are respectively provided with a trestle retractable support device (22) and a trestle parking frame (21). The trestle retractable support device (22) includes a trestle rotating platform (221), and the trestle rotating platform (221) can be rotated in a horizontal plane; the proximal end of the trestle body (2) is hinged to the trestle rotating platform (221) via a hinged column (223); a trestle retractable fixed frame (222) is provided on the trestle rotating platform (221), and the trestle body (2) away from the proximal end of the trestle body (2) and the top end of the trestle retractable fixed frame (222) are pulled by a rope (224); the trestle retractable support device (22) can realize the trestle body (2) rotating up and down along the hinged column (223) in a vertical plane by retracting and releasing the rope (224); The trestle parking frame (21) includes a parking frame body (211), the bottom end of the parking frame body (211) is welded and fixed to the platform body (100), and a trestle parking frame pad (212) is provided in the middle of the top of the parking frame body (211) for placing the recovered trestle body (2); a trestle parking frame rotation clamping device (213) is provided on the parking frame body (211) around the trestle parking frame pad (212); When the trestle body (2) is in a state of connecting the platform body (100) and the heavy oil development wellhead platform (3), the trestle body (2) spans between the trestle retractable support device (22) of the platform body (100) and the heavy oil development wellhead platform (3); When the trestle main body (2) is in a retracted state, the trestle main body (2) spans over the trestle retractable support device (22) and the trestle parking frame (21).

2. The trestle device suitable for a mobile heat injection platform according to claim 1, characterized in that: The trestle rotating platform (221) is provided with a trestle passageway (225).

3. The trestle device suitable for a mobile heat injection platform according to claim 1, characterized in that: The trestle parking frame rotation clamping device (213) has a built-in latch structure and is capable of horizontal rotation; When the latch structure rotates inward, it can clamp the trestle body (2), ensuring that the trestle body (2) is in a stable state during towing; Before the connecting trestle bridge body (2) is lifted, the latch structure is rotated outwards, and the trestle bridge body (2) can be lifted normally.

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