Operating platform for marine oil testing wellhead

Abstract

The utility model provides an operating platform for a marine oil testing wellhead, the operating platform comprises a transverse translation track, a platform connecting frame and a bearing platform, the transverse translation track is used for being fixedly connected to a workover operation platform, and the bearing platform is used for bearing an operator to operate at the wellhead. The two ends of the platform connecting frame are connected with the transverse translation rail and the bearing platform correspondingly. The platform connecting frame can be transversely moved and adjusted along the transverse translation track, and the bearing platform and the connecting frame can be folded or unfolded. The utility model has the beneficial effects that the connection with the workover operation platform and the position adjustment of the bearing platform can be realized through the transverse translation track, and the quick disassembly and assembly can be realized through the folding or unfolding of the platform connecting frame and the bearing platform.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore oil and gas well operating platforms, in particular to an operating platform for an offshore oil test wellhead. Background Art

[0002] After the drilling platform completes the drilling construction process of the offshore exploration well, the blowout preventer group is removed, and only the casing head remains at the wellhead. After taking necessary protective measures, the drilling platform is evacuated and replaced by the operating platform. After the operating platform is in place, there is no operating platform at the wellhead. In order to meet the operating conditions, the wellhead operating platform needs to be prefabricated on land in advance and transported to the operating platform by ship. When installing the wellhead operating platform, the welder is first required to stand in the manned cage with welding machines, cross main beams and other equipment and accessories. The operating platform crane will lift the cage to the vicinity of the offshore wellhead. The welder will weld the cross main beam to the watertight pipe in the cage. The cross main beam is the load-bearing foundation of the wellhead operating platform. After the cross main beam is welded, the personnel will withdraw to the deck of the operating platform. Next, the welder will stand in the prefabricated wellhead operating platform with the welding machine and accessories. After the prefabricated operating platform is lifted to the wellhead cross main beam by the operating platform crane and placed, the welder will stand in the operating platform to weld the wellhead operating platform and the cross main beam. After the welding of the wellhead operating platform is completed, an inclined ladder is set up between the operating platform deck and the wellhead operating platform, and a protective net is laid. After the oil test is completed and the blowout preventer group is removed, the wellhead operating platform needs to be removed. First, the protective net and the inclined ladder are removed. The manned cage is hoisted to the vicinity of the offshore wellhead by the operating platform crane. The gas cutting operator stands in the cage and cuts the cross main beam and the wellhead operating platform from the watertight pipe with gas welding to restore it to the initial state of the offshore wellhead.

[0003] During the welding and dismantling process of the wellhead operation platform currently used, personnel can only rely on riding in a manned cage to perform high-altitude operations, and the single pile watertight pipe and the cage will inevitably shake, making the operation difficult, time-consuming, and full of safety hazards. In case of severe weather such as strong winds and heavy rains, the work cannot be carried out, resulting in extended construction period and increased construction costs. In addition, the operation platforms in the prior art are difficult to be applied to offshore single pile oil test wells.

[0004] Therefore, it is necessary to study an operating platform for an offshore oil test wellhead to solve the above problems or alleviate the impacts of the above problems. Utility Model Content

[0005] The utility model provides an operating platform for an offshore oil test wellhead, which can be connected to a well repairing operation platform and adjust the position of a bearing platform through a transverse translation track, and can be quickly disassembled and assembled by folding or unfolding a platform connecting frame and the bearing platform, so as to effectively solve the above problems or alleviate the effects of the above problems.

[0006] The operating platform for an offshore oil test wellhead of the utility model may include a transverse translation track, a platform connecting frame and a bearing platform, wherein the transverse translation track is used to be fixedly connected to a well repair operation platform, and the bearing platform is used to carry operators to operate at the wellhead, and the two ends of the platform connecting frame are respectively connected to the transverse translation track and the bearing platform;

[0007] The platform connecting frame can be adjusted to move laterally along the transverse translation track, and the carrying platform can be folded or unfolded with the platform connecting frame.

[0008] In one embodiment, the operating platform further includes a fixed flange and a support connecting frame, wherein the fixed flange is used to be fixedly connected to the flange of the well repair operation platform, and the two ends of the support connecting frame are respectively fixedly connected to the fixed flange and the transverse translation track.

[0009] In one embodiment, the transverse translation track is provided with a movable ear seat that can slide along its length direction, and the platform connecting frame is fixedly connected to the movable ear seat.

[0010] In one embodiment, the length direction of the platform connecting frame is orthogonal to the length direction of the transverse translation track, and the platform connecting frame is provided with a ladder along its length direction.

[0011] In one embodiment, a stern top seat is provided on a side of the platform connecting frame facing away from the load-bearing platform, and the stern top seat is used to abut against a box body of the well repair operation platform.

[0012] In one embodiment, the operating platform further comprises a connecting platform, one end of the connecting platform is fixedly connected to the platform connecting frame, and the other end of the connecting platform is rotatably connected to the bearing platform.

[0013] In one embodiment, the operating platform also includes a flipping and leveling liquid cylinder located below the connecting platform, and both ends of the flipping and leveling liquid cylinder are respectively connected to the platform connecting frame and the carrying platform; the telescopic drive of the flipping and leveling liquid cylinder can drive the carrying platform to rotate relative to the connecting platform to realize the folding or unfolding of the carrying platform relative to the platform connecting frame.

[0014] In one embodiment, the support platform includes two sub-platforms arranged opposite to each other, and the two sub-platforms are respectively connected to the transverse translation track through two sets of platform connecting frames arranged in parallel.

[0015] In one embodiment, a wellhead pedal for being mounted on the outside of the wellhead is provided between the two sub-platforms, and a pedal slide groove is formed on the inner sides of the two sub-platforms. The wellhead pedal can be matched and installed at different positions of the pedal slide groove.

[0016] In one embodiment, a plurality of fixed pedals and compensating pedals are provided between the two sub-platforms. The fixed pedals are located on both sides of the wellhead pedal and fixedly connect the two sub-platforms. The compensating pedals are used to fill the gap between the load-bearing platforms.

[0017] The utility model provides an operating platform for an offshore oil test wellhead, which has at least the following beneficial effects compared with the prior art:

[0018] The operating platform for the marine oil test wellhead of the utility model can realize the connection with the well repair operation platform and the position adjustment of the bearing platform through the transverse translation track, and can realize quick disassembly and assembly through the folding or unfolding of the platform connecting frame and the bearing platform. In this way, the operating platform can be connected to the well repair operation platform, with strong bearing capacity, stable and reliable operation, and can reduce safety risks; the operating platform can adjust the position of the bearing platform, which is convenient for aligning the wellhead during installation; the operating platform can be folded or unfolded, which can realize quick disassembly and assembly, high operation efficiency, and can increase the operation area, which is convenient for operators to operate, and can also be unaffected by weather and does not interfere with the existing structure and operation method of the well repair operation platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the operating platform of the embodiment of the utility model.

[0021] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale.

[0022] Reference numerals:

[0023] 1-fixed flange, 2-support connecting frame, 3-lateral translation track, 4-platform connecting frame, 5-ladder, 6-stern top seat, 7-connecting platform, 8-flip leveling cylinder, 9-bearing platform, 10-guardrail, 11-wellhead pedal, 12-fixed pedal, 13-compensation pedal. DETAILED DESCRIPTION

[0024] The utility model will be further described below in conjunction with the accompanying drawings.

[0025] like Figure 1 As shown, the operating platform for the marine oil test wellhead of the utility model may include a transverse translation track 3, a platform connecting frame 4 and a bearing platform 9. The transverse translation track 3 is used to be fixedly connected to a well repair operation platform (not shown in the drawings), and the bearing platform 9 is used to carry operators to operate at the wellhead. Both ends of the platform connecting frame 4 are respectively connected to the transverse translation track 3 and the bearing platform 9;

[0026] The platform connecting frame 4 can be laterally moved and adjusted along the transverse translation track 3 , and the carrying platform 9 can be folded or unfolded with the platform connecting frame 4 .

[0027] Specifically, the operating platform for the offshore oil test wellhead can be connected to the well repair operation platform and adjust the position of the carrying platform 9 through the lateral translation track 3, and can be quickly disassembled and assembled by folding or unfolding the platform connecting frame 4 and the carrying platform 9.

[0028] In this way, the operating platform can be connected to the well repair operation platform, has strong carrying capacity, stable and reliable operation, and can reduce safety risks; the operating platform can adjust the position of the carrying platform 9, which is convenient for aligning the wellhead during installation; the operating platform can be folded or unfolded, which can achieve quick disassembly and assembly, high operating efficiency, and can increase the operating area, which is convenient for operators to operate, and is not affected by weather and does not interfere with the existing structure and operation method of the well repair operation platform.

[0029] In one example, the operating platform further includes a fixed flange 1 and a support connecting frame 2, wherein the fixed flange 1 is used for fixed connection with the flange of the well repair operation platform, and the two ends of the support connecting frame 2 are fixedly connected with the fixed flange 1 and the transverse translation track 3 respectively.

[0030] Specifically, the fixed flange 1 can be fixedly connected to the flange of the main deck on the well repair operation platform by bolts to play a fixing role; one end of the support connecting frame 2 is fixedly connected to the fixed flange 1, and the other end is fixedly connected to the transverse translation track 3, and the fixing method can be welding. In this way, the transverse translation track 3 is relatively fixed to the well repair operation platform, serving as the fixing foundation of the entire operation platform.

[0031] In one example, a movable ear seat capable of sliding along the length direction of the transverse translation track 3 is provided, and the platform connecting frame 4 is fixedly connected to the movable ear seat.

[0032] Specifically, the movable ear seat can slide along the length direction of the transverse translation track 3, that is, it can be moved and adjusted in the transverse direction. The ear seat at the upper end of the platform connecting frame 4 can be fixedly connected to the movable ear seat on the transverse translation track 3 through a pin shaft, so that the platform connecting frame 4 can follow the movable ear seat to achieve transverse movement and adjustment, so that the bearing platform 9 at the lower end of the platform connecting frame 4 can be aligned with the wellhead.

[0033] Furthermore, the transverse translation track 3 can be driven by a hydraulic cylinder so that the movable ear seat can be moved and adjusted along its length direction, and the movable ear seat can be locked with the transverse translation track 3 after adjustment to achieve relative fixation of the platform connecting frame 4 and the well repair operation platform.

[0034] In one example, the length direction of the platform connecting frame 4 is orthogonal to the length direction of the transverse translation track 3 , and the platform connecting frame 4 is provided with a ladder 5 along its length direction.

[0035] Specifically, the platform connecting frame 4 is vertically arranged, and its upper end is connected to the transverse translation track 3, and its lower end is connected to the load-bearing platform 9, so as to realize the connection between the load-bearing platform 9 and the transverse translation track 3, that is, to realize the connection between the load-bearing platform 9 and the well repairing operation platform. A ladder 5 is arranged on the platform connecting frame 4, so that personnel can go up and down between the load-bearing platform 9 and the well repairing operation platform without the need for temporary erection.

[0036] Furthermore, the platform connecting frame 4 may be a two-stage folding structure, which can be folded or unfolded and locked in the folded or unfolded state, so that the platform connecting frame 4 is easy to disassemble, assemble and store.

[0037] In one example, a stern top seat 6 is provided on a side of the platform connecting frame 4 that is away from the carrying platform 9. The stern top seat 6 is used to abut against a box body of the well repair operation platform.

[0038] Specifically, a stern top seat 6 is provided on the side of the platform connecting frame 4 away from the bearing platform 9, and the stern top seat 6 is used to abut against the box of the well repair operation platform, that is, after the operation platform is installed, the stern top seat 6 is in close contact with the box of the well repair operation platform, playing a role in balancing and supporting the platform connecting frame 4. The surface of the stern top seat 6 can be provided with rubber wear-resistant material to increase the service life of the stern top seat 6.

[0039] In one example, the operating platform further includes a connecting platform 7 , one end of the connecting platform 7 is fixedly connected to the platform connecting frame 4 , and the other end of the connecting platform 7 is rotatably connected to the carrying platform 9 .

[0040] Specifically, one end of the connecting platform 7 can be fixedly connected to the platform connecting frame 4 by welding, and the other end can be rotatably connected to the bearing platform 9 by a rotating pin. In this way, the bearing platform 9 can be rotated relative to the connecting platform 7 so that the bearing platform 9 and the platform connecting frame 4 form a folded or unfolded state. When the bearing platform 9 and the platform connecting frame 4 are in the unfolded state, the table surface of the bearing platform 9 is horizontally connected to the table surface of the connecting platform 7. When the bearing platform 9 and the platform connecting frame 4 are in the folded state, the table surface of the bearing platform 9 is vertical to the table surface of the connecting platform 7, and at this time, the connecting platform 7 serves as a support platform for the bearing platform 9.

[0041] In one example, the operating platform also includes a flipping and leveling cylinder 8 located below the connecting platform 7, and the two ends of the flipping and leveling cylinder 8 are respectively connected to the platform connecting frame 4 and the carrying platform 9; the telescopic drive of the flipping and leveling cylinder 8 can drive the carrying platform 9 to rotate relative to the connecting platform 7, so as to realize the folding or unfolding of the carrying platform 9 relative to the platform connecting frame 4.

[0042] Specifically, the flipping and leveling cylinder 8 is arranged below the connecting platform 7, and its two ends are respectively connected to the platform connecting frame 4 and the carrying platform 9. When the flipping and leveling cylinder 8 is extended, it can push the carrying platform 9 to rotate upward clockwise around the rotating pin connected to the connecting platform 7 until it contacts the platform connecting frame 4 to realize folding and recovery; when the flipping and leveling cylinder 8 is retracted, it can pull the carrying platform 9 to rotate downward counterclockwise around the rotating pin connected to the connecting platform 7 until it is parallel to the connecting platform 7 to realize unfolding and laying flat.

[0043] It should be noted that the load-bearing platform 9 may be provided with a downward tipping limiter to prevent the load-bearing platform 9 from continuing to rotate downward after being laid flat. The load-bearing platform 9 may also be locked and flipped by flipping the leveling cylinder 8. The load-bearing platform 9 may also be connected and tightened with a tensioning chain (not shown in the drawings) to the main structure of the well repairing platform to achieve the fixation of the load-bearing platform 9.

[0044] In one example, the carrying platform 9 includes two sub-platforms arranged opposite to each other, and the two sub-platforms are respectively connected to the transverse translation track 3 through two sets of platform connecting frames 4 arranged in parallel.

[0045] Specifically, the load-bearing platform 9 can be divided into two symmetrically connected sub-platforms on the left and right, and the two sub-platforms are respectively connected to the transverse translation track 3 through two sets of parallel platform connecting frames 4 to ensure that the positions of the two sub-platforms correspond to each other for the convenience of connecting the two. The load-bearing platform 9 is provided with two sub-platforms and two sets of platform connecting frames 4, which can reduce the size of a single component, facilitate disassembly and assembly, and storage after disassembly. At the same time, during installation, the two sets of platform connecting frames 4 make the support of the load-bearing platform 9 safer and more stable.

[0046] In one example, a wellhead pedal 11 for being mounted on the outside of the wellhead is provided between the two sub-platforms, and a pedal slide groove (not shown in the drawings) is formed on the inner sides of the two sub-platforms, and the wellhead pedal 11 can be matched and installed at different positions of the pedal slide groove.

[0047] Specifically, a pedal slot is formed between the inner sides of the two sub-platforms (the middle position of the load-bearing platform 9) and multiple sets of pin seats are configured. The wellhead pedal 11 is matched and installed in the pedal slot and can slide to the casing accordingly. The position of the wellhead pedal 11 is adjusted according to the actual situation, and then the two ends of the wellhead pedal 11 are fixed to the pin seats of the load-bearing platform 9 through pins. The inner hole diameter of the wellhead pedal 11 can be set in a variety of specifications to meet the use of different casings at sea. It should be noted that when the load-bearing platform 9 is an independent platform, a pedal slot can be opened in its middle position.

[0048] In one example, a plurality of fixed pedals 12 and compensating pedals 13 are provided between the two sub-platforms. The fixed pedals 12 are located on both sides of the wellhead pedal 11 and fixedly connect the two sub-platforms. The compensating pedals 13 are used to fill the gap of the load-bearing platform 9 .

[0049] Specifically, the two sub-platforms are arranged symmetrically, and the front and rear sides of the wellhead pedal 11 are connected by the fixed pedal 12. The fixed pedal 12 not only connects the two sub-platforms, but also increases the bearing area of ​​the bearing platform 9. The compensation pedal 13 can fill the gap of the bearing platform 9, such as the gap between the wellhead pedal 11 and the fixed pedal 12. The size of the compensation pedal 13 can be set according to actual conditions and is configured in various specifications. The filling of the compensation pedal 13 can prevent the operator from stepping on empty space, and has a safety protection effect.

[0050] In one example, a detachable guardrail 10 may be provided around the carrying platform 9. Specifically, a pin shaft is provided on the edge of the carrying platform 9 to cooperate with the guardrail 10. After the guardrail 10 is connected to the pin shaft, it can be placed upright at any time, and its bottom can be fixed by installing pins.

[0051] In one example, the operating platform is equipped with a hydraulic station (not shown in the drawings) for providing hydraulic power for its disassembly, assembly and adjustment. The hydraulic station can adopt a skid structure, which is mainly composed of a skid seat, a hydraulic oil tank, a motor pump group, a relief valve, a multi-way reversing valve, a quick connector, a hydraulic pipeline, etc. The hydraulic station can adopt a conventional hydraulic station as long as it can provide hydraulic power for the lateral adjustment of the lateral translation track 3 and the telescopic drive of the flip leveling cylinder 8.

[0052] In order to better understand the present invention, the installation process of the operating platform of the present invention is further described below in conjunction with the accompanying drawings.

[0053] First, the fixed flange 1 is fixedly connected to the flange of the main deck of the well repair operation platform through bolts, and the fixed flange 1 is fixedly connected to the transverse translation track 3 through the support connecting frame 2. The folding body of the operating platform (the bearing platform 9 and the platform connecting frame 4) is placed from the unloading port of the well repair operation platform to the main deck, and the main structure of the bearing platform 9 is connected to the connecting platform 7 through a rotating pin shaft. At this time, the bearing platform 9 and the platform connecting frame 4 are in a folded state.

[0054] Then, use the floating hook to hang the main lifting ear of the bearing platform 9, set the guide chain at the appropriate position in the reverse direction of the drilling platform, and at the same time hang the lifting ear on the body of the platform connecting frame 4. After the bearing platform 9 and the platform connecting frame 4 are hoisted as a whole, the cantilever beam of the well repairing operation platform is extended to the appropriate position, and the ear seat of the platform connecting frame 4 is connected with the movable ear seat of the transverse translation track 3. After the connection is completed, the guide chain is removed, the floating hook is lowered, and the stern top seat 6 at the rear end of the platform connecting frame 4 is against the box surface of the well repairing operation platform for support. Start the hydraulic station, operate the hydraulic reversing valve, retract the flip leveling cylinder 8, and the left and right sub-platforms of the bearing platform 9 are flat as a whole. The bearing platform 9 can be connected and tightened with the main structure of the well repairing operation platform by tensioning the iron chain to play a fixing role.

[0055] The operator goes down to the load-bearing platform 9 via the ladder 5, erects the guardrail 10 and inserts the fixing pins; two fixed pedals 12 are respectively provided at the front and rear of the load-bearing platform 9, which can be installed on the load-bearing platform 9 after the initial installation, without disassembly; a pedal slide is provided on the inner side of the load-bearing platform 9, and a suitable wellhead pedal 11 is installed according to the specifications and position of the wellhead casing. The wellhead pedal 11 slides to the casing, and the two ends are fixed to the load-bearing platform 9 by pins; the compensation pedal 13 is installed to fill the gap between the fixed pedal 12 and the wellhead pedal 11. At this point, the entire operating platform is installed, and can be folded, retracted, and unfolded and laid flat as needed. If the operating platform needs to be dismantled due to special circumstances, the disassembly process is the reverse process of the installation process. After the disassembly is completed, the components of the operating platform are placed in the appropriate position of the well repair operation platform for next use.

[0056] In summary, the beneficial effects of the marine oil test wellhead operating platform of the utility model may include:

[0057] (1) The operating platform of the utility model adopts a side-folding structure, which can be installed and disassembled quickly; the platform area is large, the operating space for operators to operate at the wellhead is large, the carrying capacity is strong, and it is safe and reliable; the operating platform is connected to the well repair operation platform, which has good stability, strong adaptability, and flexibility.

[0058] (2) The operating platform of the utility model can be formed by splicing two symmetrical sub-platforms, which is easy to disassemble and assemble; a transverse translation track is set on the main deck of the well repair operation platform, which can adjust the position of the bearing platform so that the wellhead pedal in the middle can be aligned with the wellhead.

[0059] (3) The operating platform of the utility model can be provided with a downward tipping limiter, and can be locked and flipped by a flipping leveling cylinder, and can be tightened in conjunction with a tensioning chain to enhance the load-bearing capacity and reliability; the double ladders are respectively arranged on the left and right sets of platform connecting frames, eliminating the need for hoisting the ladders.

[0060] (4) The operating platform of the utility model is connected with the well repair operation platform, has strong bearing capacity and good stability, and improves construction safety; it does not need to be installed by welding and dismantled by hot work, which saves production preparation time, can be reused, and saves labor costs and material costs for the platform built by welding; it also saves labor costs for dismantling the welding platform; it improves safety and eliminates the safety hazards existing in the original welding construction and dismantling of the wellhead platform.

[0061] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An operating platform for an offshore oil wellhead, characterized in that: The operating platform includes a transverse translation track, a platform connecting frame and a bearing platform, wherein the transverse translation track is used to be fixedly connected to the well repair operation platform, and the bearing platform is used to carry operators to operate at the wellhead, and the two ends of the platform connecting frame are respectively connected to the transverse translation track and the bearing platform; The platform connecting frame can be adjusted to move laterally along the transverse translation track, and the carrying platform can be folded or unfolded with the platform connecting frame.

2. The operating platform for marine oil wellhead according to claim 1, characterized in that: The operating platform also includes a fixed flange and a support connecting frame. The fixed flange is used to be fixedly connected to the flange of the well repair operation platform, and the two ends of the support connecting frame are respectively fixedly connected to the fixed flange and the transverse translation track.

3. The operating platform for marine oil wellhead according to claim 1, characterized in that: The transverse translation track is provided with a movable ear seat which can slide along the length direction thereof, and the platform connecting frame is fixedly connected to the movable ear seat.

4. The operating platform for marine oil testing wellhead according to claim 1, characterized in that: The length direction of the platform connecting frame is orthogonal to the length direction of the transverse translation track, and the platform connecting frame is provided with a ladder along its length direction.

5. The operating platform for marine oil testing wellhead according to claim 1, characterized in that: A stern top seat is provided on the side of the platform connecting frame facing away from the bearing platform, and the stern top seat is used to abut against the box body of the well repair operation platform.

6. The operating platform for marine oil testing wellhead according to claim 1, characterized in that: The operating platform also includes a connecting platform, one end of which is fixedly connected to the platform connecting frame, and the other end of which is rotatably connected to the bearing platform.

7. The operating platform for marine oil testing wellhead according to claim 6, characterized in that: The operating platform also includes a flip and leveling cylinder located below the connecting platform, and both ends of the flip and leveling cylinder are respectively connected to the platform connecting frame and the carrying platform; the telescopic drive of the flip and leveling cylinder can drive the carrying platform to rotate relative to the connecting platform to realize the folding or unfolding of the carrying platform relative to the platform connecting frame.

8. The operating platform for marine oil testing wellhead according to claim 1, characterized in that: The bearing platform comprises two sub-platforms arranged opposite to each other, and the two sub-platforms are respectively connected to the transverse translation track through two sets of platform connecting frames arranged in parallel.

9. The operating platform for marine oil testing wellhead according to claim 8, characterized in that: A wellhead pedal for sleeved on the outside of the wellhead is provided between the two sub-platforms, and a pedal slide groove is formed on the inner sides of the two sub-platforms. The wellhead pedal can be matched and installed at different positions of the pedal slide groove.

10. The operating platform for marine oil testing wellhead according to claim 9, characterized in that: A plurality of fixed pedals and compensating pedals are also provided between the two sub-platforms. The fixed pedals are located on both sides of the wellhead pedal and fixedly connect the two sub-platforms. The compensating pedals are used to fill the gap of the bearing platform.

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