Water conductor and offshore installation optimization process

Abstract

The drill conductor is connected with a well mouth through a drill conductor sleeve, the outer wall of the drill conductor is sleeved with the drill conductor sleeve, the inner surface of the drill conductor sleeve is provided with a plurality of limiting wedge blocks used for limiting the drill conductor to move in the horizontal direction, and the limiting wedge blocks are evenly and annularly arranged on the inner surface of the drill conductor sleeve; the marine installation optimization process uses the drill conductor, and comprises the following steps of: processing the limiting wedge block according to a design layout map; the inner side of the waterproof sleeve is subjected to lineation polishing, and the lineation position is the joint of the bottom plate and the waterproof sleeve; according to the method, the ground qualified bottom plate is connected with the waterproof sleeve, the top plate is connected with the bottom plate to form the limiting wedge blocks, the limiting wedge blocks are evenly and annularly arranged on the inner surface of the waterproof sleeve and can abut against the outer wall of the waterproof sleeve, and according to the method, damage to paint on the back face of the waterproof sleeve can be avoided, the offshore operation time is effectively shortened, and the working efficiency is improved. Therefore, the labor intensity of offshore operation is reduced.

Description

Technical Field

[0001] The invention belongs to the field of offshore operating platforms, and in particular relates to a watertight casing and an offshore installation optimization process. Background Art

[0002] The main function of the wellhead wedge is to connect the watertight casing to the wellhead tightly, so as to ensure that the watertight casing and the jacket frame will not collide with each other due to the impact of the surge, causing different degrees of damage to both. This special shape of the wedge is used to achieve a tight connection between the watertight casing and the wellhead, without any impact from any external force, resulting in collision.

[0003] The original installation process of the wedge block mainly involves prefabricating the wedge block into a whole, and then grinding off the paint on the surface of the prefabricated wedge block and the waterproof casing after the waterproof casing is piled, and then welding them together. In addition, when the wedge block is welded, the paint on the back of the guide port burns and produces a large amount of smoke, causing large-scale damage to the paint, increasing the workload of paint repair, thereby extending the service life of the offshore floating crane and increasing operating costs. It can be seen that the existing installation process is easy to damage the paint surface of the waterproof casing, thereby increasing the subsequent maintenance costs.

[0004] Therefore, it is urgent to design a waterproof casing and an optimized offshore installation process to solve the problem of high subsequent maintenance costs mentioned above. Summary of the invention

[0005] In order to solve the technical problem mentioned in the background technology that when the wedge block is welded, the paint on the back of the guide port burns and produces a large amount of smoke, causing large-scale damage to the paint, increasing the workload of paint repair, thereby extending the service life of the offshore floating crane and increasing the operating cost, a watertight casing and an offshore installation optimization process are provided.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of a watertight casing and an optimized offshore installation process of the present invention is as follows: A water-blocking casing is used to connect to a wellhead. The water-blocking casing is connected to the wellhead through a water-blocking sleeve. The water-blocking sleeve is arranged on the outer wall of the water-blocking casing. The inner surface of the water-blocking sleeve is provided with a limiting wedge block for limiting the horizontal movement of the water-blocking casing. There are multiple limiting wedge blocks, which are evenly arranged on the inner surface of the water-blocking sleeve.

[0007] Furthermore, the waterproof sleeve includes a first substrate and a second substrate that penetrate each other, one of the first substrate or the second substrate is configured to be cylindrical, and the other is configured to be truncated cone to form a bell mouth, and the limiting wedge block is arranged on the inner wall of the bell mouth.

[0008] Furthermore, the limiting wedge block includes a bottom plate and a top plate which are detachably connected, the bottom plate is used to be connected to the inner wall of the bell mouth, and the top plate is used to support the outer wall of the watertight casing.

[0009] Furthermore, the top plate includes side plates and vertical plates, which are distributed in a T shape. The vertical plates are used to connect with the bottom plate, and the side plates are used to support the outer wall of the watertight casing. Along the direction in which the opening of the bell mouth gradually increases, the distance between the side plates and the bottom plate gradually increases.

[0010] Furthermore, the side panels and the bottom panel are both arc-shaped.

[0011] An offshore installation optimization process, using the above-mentioned watertight casing, comprises the following steps: Process the limit wedge block according to the design layout drawing; Score and grind the inner side of the waterproof sleeve, where the score is at the connection between the bottom plate and the waterproof sleeve; The bottom plate that has been polished to the standard is connected to the watertight sleeve, and the top plate is connected to the bottom plate to form a limiting wedge block. The limiting wedge block is evenly arranged on the inner surface of the watertight sleeve and can be supported against the outer wall of the watertight sleeve.

[0012] Furthermore, processing the limit wedge block according to the design layout drawing includes the following steps: Typesetting and processing of the vertical plates; The side panels are rolled to form an arc shape so that the side panels meet a preset curvature radius, and a line is drawn in the middle of the side panels; The bottom plate is rolled to form an arc shape so that the bottom plate meets a preset curvature radius, and a line is drawn in the middle of the bottom plate.

[0013] Furthermore, the design layout drawing for processing the limit wedge block also includes the following steps: Assemble the bottom plate and the waterproof sleeve, connect the bottom plate to the corresponding position of the waterproof inner wall according to the marked position, and ensure the edge size, so as to weld the bottom plate to the inner wall of the waterproof sleeve; Connect the vertical plate and the side plate at the marked points to form a T-shaped top plate, and connect the T-shaped top plate and the bottom plate at the marked points, make the vertical plate intersect the bottom plate perpendicularly and then spot weld to weld the top plate to the bottom plate, at this time the side plate can be supported against the waterproof casing.

[0014] Furthermore, the inner side of the waterproof sleeve is scribed and polished, and the scribing position is the connection between the limiting wedge block and the waterproof sleeve, including the following steps: Mark the inner wall of the watertight sleeve and divide the inner wall of the watertight sleeve into equal parts according to the overall pipe diameter circumference of the watertight sleeve to form several installation areas; Score each installation area and punch holes as markings.

[0015] Furthermore, the offshore installation optimization process further comprises the following steps: Sand the waterproof casing, and stick protective tape on the reserved positions for paint at the connection between the limit wedge and the waterproof casing, and spray paint normally at other positions.

[0016] The watertight casing of the present invention has the following advantages: the watertight casing is connected to the wellhead through a limiting wedge block to ensure that the watertight casing is in the water and will not collide with other devices due to the impact of waves, causing different degrees of damage to both. Therefore, the watertight casing is arranged on the outer wall of the watertight casing to protect the watertight casing. In addition, the limiting wedge block can ensure that there is a certain distance between the watertight casing and the watertight casing, which can not only make the watertight casing and the wellhead tightly combined and not be impacted by any external force, but also limit the horizontal shaking of the watertight casing, thereby ensuring the stability of the watertight casing.

[0017] The offshore installation optimization process of the present invention has the following advantages: the optimization process manufactures the limiting wedge block in a split prefabricated manner, which is convenient for the staff to perform welding. Before assembly, the bottom plate is welded to the inner wall of the watertight sleeve in advance, thereby reducing the workload of offshore installation. In addition, the other part of the limiting wedge block, that is, the top plate, is also prefabricated. When the watertight sleeve is transported to the offshore installation, it can be directly welded to the bottom plate on the inner wall of the watertight sleeve to assemble into a limiting wedge block. Therefore, the above measures can greatly reduce the amount of welding, avoid damage to the paint on the back of the watertight sleeve, effectively reduce the offshore operation time, and thus reduce the labor intensity of offshore operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the waterproof casing and the waterproof sleeve after being assembled in Example 1 of the present invention; Figure 2 This is a schematic diagram of the structure of the waterproof jacket after the bottom plate is installed in Example 1 of the present invention; Figure 3 This is a flow chart of the offshore installation optimization process of Example 2 of the present invention; Figure 4 This is a flow chart of the offshore installation optimization process of Example 3 of the present invention.

[0019] Description of the markings in the figure: 1. Waterproof sleeve; 11. First base; 12. Second base; 2. Limiting wedge; 21. Bottom plate; 22. Top plate; 221. Side plate; 222. Vertical plate; 100, watertight casing; 210, cross bar; 220, longitudinal bar. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0021] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0022] Please refer to the attached Figure 1 To Attachment Figure 4 The present invention describes a watertight casing 100 and an optimized offshore installation process.

[0023] Embodiment 1: This embodiment provides a waterproof casing 100, which is used to connect to a wellhead. Figure 1 It is a schematic structural diagram of the waterproof casing 100 and the waterproof casing 1 after being assembled in this embodiment; Figure 2 Schematic diagram of the structure after the waterproof jacket 1 of this embodiment is installed with the bottom plate 21; Figure 1 and Figure 2 As shown, the watertight casing 100 is connected to the wellhead through the watertight casing 1. The watertight casing 1 is sleeved on the outer wall of the watertight casing 100. The inner surface of the watertight casing 1 is provided with a limiting wedge block 2 for limiting the horizontal movement of the watertight casing 100. There are multiple limiting wedge blocks 2, which are evenly arranged on the inner surface of the watertight casing 1.

[0024] The watertight casing 100 is connected to the wellhead through a limiting wedge block 2 to ensure that the watertight casing 100 will not collide with other devices due to the impact of waves in the water, causing different degrees of damage to both. Therefore, the watertight casing 1 is sleeved on the outer wall of the watertight casing 100 to protect the watertight casing 100. In addition, the limiting wedge block 2 can ensure that there is a certain distance between the watertight casing 100 and the watertight casing 1, which can not only make the watertight casing 100 tightly combined with the wellhead and not be impacted by any external force, but also limit the horizontal shaking of the watertight casing 100, thereby ensuring the stability of the watertight casing 100.

[0025] Furthermore, if Figure 2As shown, the waterproof sleeve 1 includes a first base 11 and a second base 12 that penetrate each other. One of the first base 11 or the second base 12 is configured to be cylindrical, and the other is configured to be truncated cone to form a bell mouth. The limiting wedge block 2 is arranged on the inner wall of the bell mouth.

[0026] As a preferred embodiment, the first base 11 is set in a truncated cone shape, and the second base 12 is set in a cylindrical shape. The first base 11 is in the shape of an inverted truncated cone with open top and bottom surfaces, hollow inside, and the second base 12 is located below the gradient portion and is cylindrical. There are multiple limiting wedge blocks 2, which are evenly arranged on the inner surface of the truncated cone-shaped first base 11. When the watertight casing 100 is lowered and passes through the first base 11 and the second base 12, the limiting wedge blocks 2 are welded to the first base 11, and a small gap is left between the limiting wedge blocks 2 and the watertight casing 100, thereby restricting the watertight casing 100 from moving in the horizontal direction.

[0027] Furthermore, the limiting wedge block 2 includes a bottom plate 21 and a top plate 22 that are detachably connected, the bottom plate 21 is used to be connected to the inner wall of the bell mouth, and the top plate 22 is used to abut against the outer wall of the waterproof casing 100.

[0028] Furthermore, the top plate 22 includes a side plate 221 and a vertical plate 222, and the side plate 221 and the vertical plate 222 are distributed in a T shape. The vertical plate 222 is used to be connected to the bottom plate 21, and the side plate 221 is used to support the outer wall of the watertight casing 100. Along the direction in which the opening of the bell mouth gradually increases, the distance between the side plate 221 and the bottom plate 21 gradually increases.

[0029] Furthermore, the side plate 221 and the bottom plate 21 are both in an arc shape.

[0030] This embodiment also provides a support platform, including multiple layers of support flat layers, each layer is composed of multiple vertically intersecting cross bars 210 and longitudinal bars 220, and the intersection of the cross bars 210 and the longitudinal bars 220 is provided with a waterproof casing 100 and a waterproof casing 1, and the cross bars 210 and the longitudinal bars 220 are connected to the first base 11 or the second base 12 of the waterproof casing 1. Through the joint action of the cross bars 210 and the longitudinal bars 220, the support flat layer and the mud surface can jointly bear the gravity of the support platform and the horizontal load given by the sea water, thereby improving the overall stability of the support platform.

[0031] It should be noted that the above-mentioned support platform has various forms. In addition to the combination of the horizontal rod 210 and the vertical rod 220 in this embodiment, the support structure can also be set as a solid structure, and a vertically extending fixed channel can be opened inside the solid structure. A plurality of vertically extending pipes can also be fixedly connected on the support frame as fixed channels, as long as the installation requirements of the watertight sleeve 1 and the watertight sleeve 100 can be met.

[0032] Embodiment 2: This embodiment provides an offshore installation optimization process, using the watertight casing 100 of embodiment 1. Figure 3 This is a flow chart of the offshore installation optimization process of this embodiment, as shown in Figure 3 As shown, the offshore installation optimization process includes the following steps: S11, processing the limit wedge block 2 according to the design layout drawing; S12, marking and polishing the inner side of the waterproof sleeve 1, where the marking position is the connection between the bottom plate 21 and the waterproof sleeve 1; S13, connect the polished and qualified bottom plate 21 with the waterproof sleeve 1, and connect the top plate 22 with the bottom plate 21 to form a limiting wedge block 2. The limiting wedge block 2 is evenly arranged on the inner surface of the waterproof sleeve 1 and can be supported against the outer wall of the waterproof sleeve 100.

[0033] The optimized process manufactures the limiting wedge 2 in a split prefabricated manner, which is convenient for the workers to perform welding. Before assembly, the bottom plate 21 is welded to the inner wall of the watertight sleeve 1 in advance, thereby reducing the workload of offshore installation. In addition, the other part of the limiting wedge 2, that is, the top plate 22, is also prefabricated. When the watertight sleeve 100 is transported to the sea for installation, it can be directly welded to the bottom plate 21 on the inner wall of the watertight sleeve 1 to assemble into the limiting wedge 2. Therefore, the above measures can greatly reduce the amount of welding, avoid damage to the paint on the back of the watertight sleeve 100, effectively reduce the offshore operation time, and thus reduce the labor intensity of offshore operations.

[0034] Embodiment 3: This embodiment provides an offshore installation optimization process, using the watertight casing 100 of embodiment 1. This embodiment is similar to embodiment 2. Figure 4 This is a flow chart of the offshore installation optimization process of this embodiment, as shown in Figure 4 As shown, the offshore installation optimization process specifically includes the following steps: S21, processing the limit wedge block 2 according to the design layout drawing; S22, marking and polishing the inner side of the waterproof sleeve 1, where the marking position is the connection between the bottom plate 21 and the waterproof sleeve 1; S23, sandblast the waterproof casing 100, and stick protective tape on the reserved position for paint on the connection between the limiting wedge block 2 and the waterproof casing 1, and spray paint on other positions normally; S24. Connect the polished and qualified bottom plate 21 to the waterproof sleeve 1, and connect the top plate 22 to the bottom plate 21 to form a limiting wedge block 2. The limiting wedge block 2 is evenly arranged on the inner surface of the waterproof sleeve 1 and can be supported against the outer wall of the waterproof sleeve 100.

[0035] Compared with Example 1, this embodiment adds a sandblasting step, namely S23. Its purpose is that before painting, there may be dirt, grease, oxide layer, rust layer, etc. on the surface of the waterproof casing 100, and the sandblasting operation can polish the surface of metal, plastic and other materials to make it smoother, brighter and have a better appearance. In addition, the sandblasting treatment can increase the roughness of the surface of the waterproof casing 100, improve the grip and friction, thereby enhancing the use effect of the object. This treatment can also improve the adhesion, wear resistance and corrosion resistance of the surface of the object, making it convenient for workers to carry out subsequent painting operations.

[0036] Specifically, the above step S21, processing the limiting wedge block 2 according to the design layout drawing, specifically includes the following steps: S211, performing typesetting processing on the opposing plate 222; S212, rolling the side plate 221 to form an arc shape so that the side plate 221 meets a preset curvature radius, and marking the middle position of the side plate 221; S213 , rolling the bottom plate 21 to form an arc shape so that the bottom plate 21 meets a preset curvature radius, and marking a line at the middle position of the bottom plate 21 .

[0037] Specifically, the above step S22, marking and polishing the inner side of the waterproof sleeve 1, wherein the marking position is the connection between the bottom plate 21 and the waterproof sleeve 1, specifically includes the following steps: S221, marking the inner wall of the watertight sleeve 1, and dividing the inner wall of the watertight sleeve 1 into equal parts according to the overall pipe diameter circumference of the watertight sleeve 1 to form a plurality of installation areas; S222. Mark each installation area and punch holes as marks.

[0038] Specifically, the above step S21, processing the limiting wedge block 2 according to the design layout drawing, further includes the following steps: S215, assemble the bottom plate 21 and the waterproof sleeve 1, connect the bottom plate 21 to the corresponding position of the waterproof inner wall according to the marked position, and ensure the edge size so as to weld the bottom plate 21 to the inner wall of the waterproof sleeve 1.

[0039] S216. Connect the vertical plate 222 and the side plate 221 at the marked points to form a T-shaped top plate 22, and connect the T-shaped top plate 22 and the bottom plate 21 at the marked points, so that the vertical plate 222 intersects the bottom plate 21 perpendicularly and then spot welds the top plate 22 to the bottom plate 21. At this time, the side plate 221 can be supported against the watertight casing 100.

[0040] By manufacturing the limiting wedge block 2 in a split prefabricated manner, it is convenient for the staff to perform welding. Specifically, before assembly, the bottom plate 21 is first welded to the inner wall of the watertight sleeve 1 in advance, thereby reducing the workload of offshore installation. In addition, the other part of the limiting wedge block 2, that is, the top plate 22, is also prefabricated, that is, the vertical plate 222 and the side plate 221 are first prefabricated into a T-shaped top plate 22. When the watertight sleeve 100 is transported to the sea for installation, the T-shaped top plate 22 can be directly welded to the bottom plate 21 on the inner wall of the watertight sleeve 1 to assemble the limiting wedge block 2. Therefore, it saves the workload of the construction workers and avoids the problem of instability of the watertight sleeve 100 caused by misalignment of the bottom plate 21. At the same time, it improves the overall utilization rate of the device and ensures the safety of on-site operations.

[0041] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A waterproof casing, used to connect to a wellhead, characterized in that: The watertight casing is connected to the wellhead through a watertight sleeve, and the watertight sleeve is arranged on the outer wall of the watertight casing. The inner surface of the watertight sleeve is provided with a limiting wedge block for limiting the horizontal movement of the watertight casing. There are multiple limiting wedge blocks, which are evenly arranged on the inner surface of the watertight sleeve.

2. The waterproof casing according to claim 1, characterized in that: The watertight sleeve comprises a first base and a second base which are interpenetrating with each other. One of the first base or the second base is configured as a cylinder, and the other is configured as a truncated cone to form a bell mouth. The limiting wedge block is arranged on the inner wall of the bell mouth.

3. The waterproof casing according to claim 2, characterized in that: The limiting wedge block comprises a bottom plate and a top plate which are detachably connected, wherein the bottom plate is used to be connected to the inner wall of the bell mouth, and the top plate is used to abut against the outer wall of the watertight casing.

4. The waterproof casing according to claim 3, characterized in that: The top plate includes side plates and vertical plates, which are distributed in a T shape. The vertical plates are used to connect with the bottom plate, and the side plates are used to support the outer wall of the watertight casing. As the opening of the bell mouth gradually increases, the distance between the side plates and the bottom plate gradually increases.

5. The waterproof casing according to claim 4, characterized in that: The side panels and bottom panel are both arc-shaped.

6. An offshore installation optimization process, using the watertight casing according to claim 4, characterized in that: The following steps are involved: Process the limit wedge block according to the design layout drawing; Score and grind the inner side of the waterproof sleeve, where the score is at the connection between the bottom plate and the waterproof sleeve; The bottom plate that has been polished to the standard is connected to the watertight sleeve, and the top plate is connected to the bottom plate to form a limiting wedge block. The limiting wedge block is evenly arranged on the inner surface of the watertight sleeve and can be supported against the outer wall of the watertight sleeve.

7. The offshore installation optimization process according to claim 6, characterized in that: The processing of the limit wedge according to the design layout drawing includes the following steps: Typesetting and processing of the vertical plates; The side panels are rolled to form an arc shape so that the side panels meet a preset curvature radius, and a line is drawn in the middle of the side panels; The bottom plate is rolled to form an arc shape so that the bottom plate meets a preset curvature radius, and a line is drawn in the middle of the bottom plate.

8. The offshore installation optimization process according to any one of claims 6 or 7, characterized in that: Designing the layout drawing to process the limit wedge block also includes the following steps: Assemble the bottom plate and the waterproof sleeve, connect the bottom plate to the corresponding position of the waterproof inner wall according to the marked position, and ensure the edge size, so as to weld the bottom plate to the inner wall of the waterproof sleeve; Connect the vertical plate and the side plate at the marked points to form a T-shaped top plate, and connect the T-shaped top plate and the bottom plate at the marked points, make the vertical plate intersect the bottom plate perpendicularly and then spot weld to weld the top plate to the bottom plate, at this time the side plate can be supported against the waterproof casing.

9. The offshore installation optimization process according to claim 6, characterized in that: Score and polish the inner side of the waterproof sleeve, where the score line is the connection between the bottom plate and the waterproof sleeve, including the following steps: Mark the inner wall of the watertight sleeve and divide the inner wall of the watertight sleeve into equal parts according to the overall pipe diameter circumference of the watertight sleeve to form several installation areas; Score each installation area and punch holes as markings.

10. The offshore installation optimization process according to claim 6, characterized in that: The offshore installation optimization process also includes the following steps: Sand the waterproof casing, and stick protective tape on the reserved positions for paint at the connection between the limit wedge and the waterproof casing, and spray paint normally at other positions.

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