An integrated dismountable drilling assistant platform

Abstract

The application discloses a whole dismounting drilling auxiliary platform, which comprises a drilling auxiliary platform deck, a supporting frame and an inverted sharp structure arranged in sequence in the vertical direction, so that the drilling auxiliary platform deck is arranged on a support rod of a jacket wellhead area; the drilling auxiliary platform deck is composed of a steel beam frame and a plurality of detachable guide structures which are arranged on the steel beam frame at intervals; one end of the supporting frame is connected with the steel beam frame of the drilling auxiliary platform deck, and the end of the supporting frame away from the steel beam frame is inserted into a plate assembly structure of the inverted sharp structure; the inverted sharp structure further comprises a supporting part connected with the support rod, the plate assembly structure is vertically connected to the supporting part, and an inclined support is connected between the plate assembly structure and the supporting part. The whole dismounting drilling auxiliary platform provided by the application effectively avoids a large amount of offshore assembly and welding operation, can reduce construction safety risks and ship use cost, and has remarkable economy and safety.

Description

Technical Field

[0001] This invention belongs to the field of marine platform structural design technology, and particularly relates to a drilling auxiliary platform that can be disassembled as a whole. Background Technology

[0002] After the offshore fixed platform is installed at sea and before the upper module is installed, a temporary pre-drilling auxiliary operation platform is usually set up at a specific elevation in the wellhead area of ​​the jacket to meet the needs of pre-drilling operations. This platform needs to be removed after the pre-drilling operation is completed in order to make room for the installation of the upper module.

[0003] Currently, the commonly used technical solution in the industry is to use the riser casing as the main support structure after it has been installed and piled at sea, and then weld and assemble the deck and support structure of the pre-drilling auxiliary platform at sea. This traditional "offshore bulk" model has significant limitations: First, the entire construction process involves a large number of offshore assembly and welding operations, which not only require the erection of construction scaffolding, but also pose high risks to offshore construction, low operational efficiency, and are greatly affected by adverse sea conditions. Secondly, offshore construction operations require additional ship days, resulting in high construction costs.

[0004] Therefore, there is an urgent need to design a drilling auxiliary platform that can be disassembled and reassembled as a whole to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a drilling auxiliary platform that can be disassembled as a whole, which has the advantages of reducing the amount of offshore operations and dependence on large vessels and other operational resources, effectively controlling construction risks and costs, and solving the problems involved in the background art.

[0006] To achieve the above objectives, the specific technical solution of the overall disassembly and assembly drilling auxiliary platform of the present invention is as follows: A fully detachable drilling auxiliary platform includes a drilling auxiliary platform deck, a support frame, and an inverted tip structure arranged sequentially in a vertical direction, thereby allowing the drilling auxiliary platform deck to be mounted on the struts in the wellhead area of ​​the jacket. The drilling support platform deck consists of a steel beam frame and multiple detachable guide structures spaced apart on the steel beam frame; One end of the support frame is connected to the steel beam frame of the drilling auxiliary platform deck, and the other end of the support frame away from the steel beam frame is inserted into the plate splicing structure of the inverted tip structure. The inverted tip structure also includes a support part connected to the strut, a plate splicing structure vertically connected to the support part, and an oblique support connecting the plate splicing structure and the support part.

[0007] Furthermore, guardrails are connected circumferentially along the steel beam frame.

[0008] Furthermore, anti-slip decks are provided at the ends of the steel beam frame.

[0009] Furthermore, the support frame includes four spaced and parallel vertical support columns, and horizontal reinforcing struts are fixedly connected between adjacent vertical support columns.

[0010] Furthermore, the overall panel structure is cross-shaped, and multiple reinforcing ribs are connected to the panel structure to ensure overall stability.

[0011] Furthermore, the detachable guide structure includes a channel steel and a semi-circular tube. The semi-circular tube is connected to the notch of the steel beam frame through the channel steel, and the limiting part formed by the two semi-circular tubes is used to limit the water-proof sleeve.

[0012] Furthermore, the channel steel is connected between the port of the semi-circular tube and the steel beam frame.

[0013] Furthermore, an I-beam is connected to the outer wall of the semicircular tube away from the opening, and the end of the I-beam away from the semicircular tube is connected to the steel beam frame.

[0014] Furthermore, a support plate is connected to the steel beam frame so that the end of the I-beam away from the semi-circular tube is connected to the support plate by vertical fastening bolts.

[0015] Furthermore, adjacent channel steels are connected and fixed together by transverse fastening bolts.

[0016] The fully detachable drilling auxiliary platform of the present invention has the following advantages: (1) When the present invention is used for offshore construction, the drilling auxiliary platform deck only needs to be hoisted as a whole and connected with the inverted tip structure to complete the installation. After the drilling operation is completed, it can also be completely dismantled and reused on a wellhead platform of the same size and specifications after dismantling.

[0017] (2) The inverted tip structure of the present invention can also adjust the elevation of the drilling auxiliary platform according to the actual installation accuracy of the guide frame, so as to meet the needs of drilling construction.

[0018] (3) The present invention effectively avoids a large number of offshore assembly and welding operations, which can reduce construction safety risks and ship usage costs. Moreover, the dismantled platform structure can be reused in the same specification jacket, which has significant economic benefits and safety. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the drilling auxiliary platform of the present invention, which can be disassembled and assembled as a whole; Figure 2 This is a schematic diagram of the overall structure of the drilling auxiliary platform deck of the present invention; Figure 3This is a schematic diagram of the overall structure of the support frame of the present invention; Figure 4 This is a schematic diagram of the overall structure of the inverted tip structure of the present invention; Figure 5 This is a schematic diagram of the overall structure of the detachable guide structure of the present invention; Figure 6 This is a schematic diagram of the connection structure of the semi-circular tube of the present invention.

[0020] Explanation of markings in the diagram: 1. Drilling auxiliary platform deck; 2. Support frame; 3. Inverted tip structure; 4. Steel beam frame; 5. Detachable guide structure; 6. Anti-slip deck; 7. Guardrail; 8. Vertical support column; 9. Horizontal reinforcing strut; 10. Support section; 11. Diagonal support; 12. Plate splicing structure; 13. Reinforcing rib plate; 14. Channel steel; 15. Semi-circular tube; 16. I-beam; 17. Horizontal fastening bolt; 18. Vertical fastening bolt; 19. Support plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0023] The following is a reference to the appendix. Figure 1 To be continued Figure 6 This invention describes a drilling auxiliary platform that can be disassembled and reassembled as a whole.

[0024] like Figure 1As shown, the drilling auxiliary platform of this invention, which can be disassembled and reassembled as a whole, adopts a layered integrated assembly structure. Along the vertical axis of the equipment, the drilling auxiliary platform deck 1, support frame 2, and inverted tip structure 3 are coaxially assembled from top to bottom. The three layers are connected and fixed from top to bottom, forming an integrated load-bearing and disassembly-removable structure. The entire set of equipment is mounted on the top surface of the support rods in the wellhead area of ​​the offshore drilling platform via the bottom inverted tip structure 3, achieving modular installation without welding and allowing for overall hoisting and disassembly. This adapts to the drilling auxiliary operation requirements in the confined working space of the wellhead area of ​​the wellhead, and the overall structure exhibits extremely high stability and ease of assembly and disassembly.

[0025] Furthermore, such as Figure 1 and Figure 2 As shown, the drilling auxiliary platform deck 1 serves as the main structure for the upper load-bearing and operation of the equipment. It is an integral rectangular frame load-bearing platform, with the core consisting of a high-strength alloy steel beam frame 4 and multiple sets of detachable guide structures 5 assembled in a modular manner. All connection nodes are fastened with detachable bolts to meet the needs of separate maintenance and overall disassembly and assembly.

[0026] The steel beam frame 4 serves as the core load-bearing structure of the deck. It is formed by welding multiple rectangular and I-beams end to end, resulting in uniform overall frame rigidity and balanced load-bearing capacity. The frame contains evenly distributed assembly notches for positioning and installation of the detachable guide structure 5. Guardrails 7 are fixedly mounted along the entire circumferential side of the outer contour of the steel beam frame 4. These guardrails 7 employ a double-layer protective structure with vertical round tube columns and horizontal handrails. The columns are vertically welded and fixed to the top edge of the steel beam frame 4, with uniform spacing between adjacent columns. The horizontal handrails are welded and fixed to the top of the columns, completely enclosing the work area and eliminating safety hazards associated with working at height.

[0027] Meanwhile, the working end of the steel beam frame 4 is fully covered with anti-slip deck 6. The anti-slip deck 6 is made of patterned steel plate and is fastened to the top surface of the steel beam frame 4 with countersunk bolts. The surface of the deck is evenly patterned with anti-slip texture, which can effectively prevent workers from slipping in the humid and misty environment at sea, ensuring the safety of operations on the top surface of the platform. Multiple sets of detachable guide structures 5 are arranged at equal intervals along the length of the steel beam frame 4, providing precise positioning, vertical limiting and quick insertion guidance for the watertight sleeve. It is the core guide structure for achieving precise assembly of the equipment as a whole.

[0028] Furthermore, such as Figure 5 and Figure 6As shown, each set of detachable guide structures 5 consists of channel steel 14, semi-circular tube 15, I-beam 16, support plate 19, vertical fastening bolt 18, and horizontal fastening bolt 17. It is an integrated detachable guide and limiting assembly. Each component is precisely matched and assembled, with high positioning accuracy and convenient disassembly and assembly. The specific assembly structure is as follows: the semi-circular tube 15 is a vertically open arc-shaped guide component. Two symmetrically arranged semi-circular tubes 15 cooperate with each other, and the inner arc-shaped surfaces surround to form a circular limiting part. The inner diameter of the limiting part is precisely matched with the outer diameter of the water-proof sleeve, which can realize the rapid alignment and insertion of the water-proof sleeve and radial limiting, effectively limiting the horizontal offset and shaking of the water-proof sleeve after assembly.

[0029] More specifically, the semicircular tube 15 is fixedly connected to the notch of the steel beam frame 4 via a channel steel 14. The channel steel 14 is a groove-type load-bearing connector, with one end fitted and fixed to the outer wall of the upper and lower ends of the semicircular tube 15, and the other end snapped and fixed to the inner side of the pre-set notch of the steel beam frame 4, thus achieving the initial positioning and fixation of the semicircular tube 15 and the steel beam frame 4. To further enhance the overall load-bearing strength of the guide structure, an I-beam 16 is vertically welded and fixed at the center of the arc-shaped outer wall of the semicircular tube 15 away from the opening. The I-beam 16 is a vertical load-bearing reinforcement component, and is set perpendicular to the deck plane.

[0030] Furthermore, corresponding to the assembly position of the I-beam 16, a matching support plate 19 is welded and fixed to the top surface of the steel beam frame 4. The support plate 19 is a thickened steel plate structure with pre-set precise bolt assembly holes on its surface. The bottom end of the I-beam 16 is locked and fixed to the support plate 19 by multiple sets of vertical fastening bolts 18, which evenly transfers the load-bearing stress of the semi-circular tube 15 and the I-beam 16 to the steel beam frame 4, significantly improving the vertical load-bearing capacity of the guide structure. In addition, the sides of the channel steel 14 of two adjacent sets of detachable guide structures 5 are locked together by transverse fastening bolts 17, so that all guide structures form an integral linkage structure, avoiding force deviation and loosening of a single set of guide structures, and ensuring the overall guide positioning accuracy and structural stability.

[0031] More specifically, the support frame 2 is a load-bearing support structure that connects the upper and lower parts of the equipment. It is a vertical three-dimensional frame structure. The upper end is fixedly connected to the bottom surface of the steel beam frame 4 of the drilling auxiliary platform deck 1, and the lower end is integrally inserted and assembled on the top of the inverted tip structure 3. It mainly bears the responsibility of transmitting deck operation loads and providing vertical support. The core of the support frame 2 includes four vertical support columns 8 and multiple sets of horizontal reinforcing struts 9. The four vertical support columns 8 are arranged symmetrically at the four corners of a rectangle, parallel to each other and perpendicular to the deck plane. The top of the support columns 8 precisely corresponds to the cross position of the steel beam frame 4, realizing the precise alignment and assembly of the support frame 2 and the deck.

[0032] Meanwhile, between each pair of adjacent vertical support columns 8, multiple sets of transverse reinforcing struts 9 are fixed at intervals along the vertical direction of the columns. The two ends of the transverse reinforcing struts 9 are fully welded to the outer wall of the corresponding column. By using transverse tie-and limiting, the horizontal spacing of the four vertical support columns 8 is limited, which offsets the horizontal shear force and torsion generated during the operation, avoids column deformation and tilting, and makes the four independent columns form an overall rigid frame, which greatly improves the overall deformation resistance and structural stability of the support frame 2, and ensures that the vertical load is evenly transmitted downward.

[0033] Furthermore, such as Figure 3 and Figure 4 As shown, the inverted tip structure 3 is the bottom positioning and bearing base of the equipment. It is the connecting base between the entire platform and the wellhead area support rod of the jacket frame. The whole adopts a plate-jointed integrated molding structure, mainly composed of support part 10, cross-shaped plate-jointed structure 12, diagonal support 11, and reinforcing rib plate 13. The structure has strong bearing capacity and high positioning stability, and can adapt to the stress requirements of complex offshore working conditions.

[0034] Among them, the support part 10 is a vertical bearing base structure, which is fixed on the support structure in the wellhead area of ​​the guide frame, providing bottom support and positioning for the entire set of equipment; the top surface of the support part 10 is vertically fixed to the plate splicing structure 12, which is a cross-shaped three-dimensional splicing structure, formed by vertically and cross-welding multiple thickened steel plates. The four-way extended plate surface of the cross-shaped structure can bear the vertical pressure of the support frame 2 in all directions, and the force is uniform with no stress concentration points.

[0035] Meanwhile, to enhance the rigidity and bending resistance of the plate-and-panel structure 12, multiple sets of reinforcing ribs 13 are uniformly welded to the intersection nodes and four-way extending plates of the cross-shaped plate-and-panel structure 12. The reinforcing ribs 13 are triangular or rectangular thickened steel plates, welded perpendicularly to the plate surface of the plate-and-panel structure 12, effectively improving the overall structural strength of the plate-and-panel structure 12 and preventing deformation and cracking under long-term pressure and wind loads. At the same time, multiple sets of diagonal supports 11 are evenly arranged in a ring between the vertically set support 10 and the vertically set plate-and-panel structure 12. The two ends of the diagonal supports 11 are welded and fixed to the top surface of the support 10 and the outer wall of the plate-and-panel structure 12, respectively, forming a triangular stable force-bearing system. This effectively disperses vertical loads and horizontal wind loads, prevents breakage or displacement at the connection nodes between the plate-and-panel structure 12 and the support 10, and ensures the overall stability of the base.

[0036] The bottom end of the support frame 2 is precisely inserted into the pre-set assembly position on the top surface of the cross-shaped plate splicing structure 12 of the inverted tip structure 3, realizing the rapid alignment and assembly of the support frame 2 and the bottom base. Combined with the double limiting of the upper detachable guide structure 5, the entire drilling auxiliary platform forms a fully limited and highly stable overall disassembly and assembly structure from top to bottom, which can realize overall hoisting and disassembly without the need for on-site piecemeal assembly, greatly improving the efficiency of operation.

[0037] The working principle of the fully detachable drilling auxiliary platform in this invention is as follows: First, the drilling auxiliary platform deck 1 and support frame 2 are prefabricated on land and assembled into a whole. The inverted tip structure 3 is welded to the wellhead support during the land prefabrication of the jacket and installed at sea together with the jacket. After the jacket is installed at sea, the prefabricated drilling auxiliary platform deck 1 and support frame 2 are connected to the inverted tip structure 3. Before connection, the cutting length of the vertical support column 8 of the support frame 2 can be determined according to the measured actual installation elevation of the jacket and the required elevation of the drilling auxiliary platform. After the drilling operation is completed, the detachable guide structure 5 can be removed as needed, and then the drilling auxiliary platform deck 1 and support frame 2 can be hoisted and moved away.

[0038] Based on the overall disassembly and assembly of the drilling auxiliary platform, this invention effectively avoids a large number of offshore assembly and welding operations, which can reduce construction safety risks and ship usage costs. Moreover, the disassembled platform structure can be reused in the jacket of the same specification, which has significant economic benefits and safety.

[0039] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A drilling auxiliary platform that can be disassembled and reassembled as a whole, characterized in that, It includes a drilling auxiliary platform deck, a support frame, and an inverted tip structure arranged sequentially in the vertical direction, thereby enabling the drilling auxiliary platform deck to be set on the struts in the wellhead area of ​​the jacket; The drilling support platform deck consists of a steel beam frame and multiple detachable guide structures spaced apart on the steel beam frame; One end of the support frame is connected to the steel beam frame of the drilling auxiliary platform deck, and the other end of the support frame away from the steel beam frame is inserted into the plate splicing structure of the inverted tip structure. The inverted tip structure also includes a support part connected to the strut, a plate splicing structure vertically connected to the support part, and an oblique support connecting the plate splicing structure and the support part.

2. The drilling auxiliary platform that can be disassembled and reassembled as described in claim 1, characterized in that, Guardrails are connected around the circumference of the steel beam frame.

3. The drilling auxiliary platform that can be disassembled and reassembled as described in claim 1, characterized in that, Anti-slip decks are installed at the ends of the steel beam frame.

4. The drilling auxiliary platform that can be disassembled and reassembled as described in claim 1, characterized in that, The support frame includes four spaced and parallel vertical support columns, and horizontal reinforcing struts are fixedly connected between adjacent vertical support columns.

5. The drilling auxiliary platform that can be disassembled and reassembled as described in claim 1, characterized in that, The overall structure of the panel structure is cross-shaped, and multiple reinforcing ribs are connected to the panel structure to ensure the overall stability of the panel structure.

6. The drilling auxiliary platform that can be disassembled and reassembled as described in claim 1, characterized in that, The detachable guide structure includes a channel steel and a semi-circular tube. The semi-circular tube is connected to the notch of the steel beam frame through the channel steel, and the limiting part formed by the two semi-circular tubes is used to limit the water-proof sleeve.

7. The drilling auxiliary platform that can be disassembled and reassembled as described in claim 6, characterized in that, The channel steel connects the port of the semi-circular tube to the steel beam frame.

8. The drilling auxiliary platform that can be disassembled and reassembled as described in claim 6, characterized in that, An I-beam is attached to the outer wall of the semicircular tube away from the opening, and the end of the I-beam away from the semicircular tube is attached to the steel beam frame.

9. The drilling auxiliary platform that can be disassembled and reassembled as described in claim 8, characterized in that, Support plates are connected to the steel beam frame so that the end of the I-beam away from the semi-circular tube is connected to the support plates by vertical fastening bolts.

10. The drilling auxiliary platform that can be disassembled and reassembled as described in claim 7, characterized in that, Adjacent channel steels are connected and fixed by transverse fastening bolts.

Images