Single-piece installation device for bottom section of offshore module rig tower

Abstract

The utility model discloses a kind of marine module drilling rig tower bottom section monolithic mounting device, including crossbeam, the crossbeam is fixed on drill floor by first ear seat and second single taper pin;Strut is connected on crossbeam, and strut is connected with crossbeam by first single taper pin, shear pin and safety pin;The other end of strut is equipped with second ear seat, and second ear seat is connected with tower bottom section monolithic by U-type bolt assembly, nut and gasket.The utility model forms stable triangle support structure by crossbeam, strut and tower bottom section monolithic, realizes that accurate, stable installation of tower bottom section can be completed using single crane, effectively solve the technical problems of poor stability, low efficiency, high safety risk in traditional installation method, significantly improve installation efficiency and operation safety.

Description

Technical Field

[0001] This utility model relates to the technical field of marine modular drilling equipment, specifically a single-piece installation device for the bottom section of a marine modular drilling rig tower. Background Technology

[0002] Offshore modular drilling rigs are key equipment for offshore oil and gas exploration and development; the efficiency and safety of their structural installation directly affect operating costs and project schedules. The drilling rig tower, as the core load-bearing structure of the drilling rig system, undertakes important functions such as derrick support, guiding the traveling block system, and transferring drilling loads. The tower typically adopts a segmented truss structure, with the bottom section serving as the foundation of the entire tower; its installation quality directly affects the stability and service life of the overall structure.

[0003] Currently, traditional methods for installing offshore modular drilling rig towers present the following technical problems: 1) Poor installation stability: When installing the tower base section using a traditional single crane, the high center of gravity and limited support points of a single structure make it prone to swaying and tilting during positioning, affecting positioning accuracy and posing a risk of collision with adjacent structures; 2) Difficulty in guaranteeing positioning accuracy: The installation of the tower base section requires precise alignment with the drilling platform foundation. Traditional methods rely on manual traction and adjustment, which is not only labor-intensive but also time-consuming due to fluctuations in the marine environment, making it difficult to meet design requirements for installation accuracy; 3) High safety risks: During installation, workers need to approach the suspended heavy components for auxiliary positioning, posing significant safety risks. Furthermore, the prolonged heavy-load suspension of the crane increases the probability of equipment failure; 4) Low installation efficiency: Due to the above problems, traditional installation methods often require multiple lifting and repeated adjustments, with single-section installation typically taking several hours, severely impacting the overall project schedule. 5) Reliance on specialized tooling: Existing technologies lack specialized tower base installation devices, and temporary welding supports or simple tooling are often used on site. These temporary measures are not only unreliable, but also have low reusability, increasing project costs.

[0004] In recent years, with the increasing demand for modular and standardized development of marine drilling rigs, it has become particularly important to develop a specialized installation device that can adapt to the offshore operating environment, improve installation efficiency, and ensure operational safety. Although some auxiliary tooling exists for structural installation, a dedicated device for the single-piece installation of the base section of a marine modular drilling rig tower is still lacking.

[0005] Against this technical background, this utility model develops a special single-piece installation device for the installation characteristics and working environment of the bottom section of the marine modular drilling rig tower, effectively solving the technical problems existing in traditional installation methods. Utility Model Content

[0006] The purpose of this invention is to provide a single-piece installation device for the bottom section of a marine modular drilling rig tower, which solves the problems of low installation efficiency, poor stability, and high safety risks in the existing technology for the bottom section of the tower.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a single-piece installation device for the bottom section of a marine modular drilling rig tower, comprising a crossbeam, the crossbeam being fixed to the drilling platform surface by a first lug and a second single taper pin; a support rod is connected to the crossbeam, the support rod being connected to the crossbeam by a first single taper pin, a shear pin and a pin; the other end of the support rod is provided with a second lug, the second lug being connected to the single-piece bottom section of the tower by a U-bolt assembly, a nut and a washer.

[0008] Preferably, the crossbeam is an irregular I-beam with connecting lugs at both ends, and a closed lifting lug is welded to its upper part.

[0009] Preferably, the first ear seat is welded to the drill table surface and fixedly connected to the crossbeam by a second single taper pin, an anti-shear pin, and a pin.

[0010] Preferably, the strut is connected to the lug at the middle part of the crossbeam via a first single taper pin, a shear pin, and a safety pin.

[0011] Preferably, the second lug is welded to the end of the strut and is fastened to the bottom section of the tower piece by a U-bolt assembly, nut and washer.

[0012] Preferably, the U-bolt assembly passes through the connection hole of a single piece at the bottom of the tower and is locked in place by nuts and washers.

[0013] The working process of this utility model is as follows: 1) Preliminary preparations and beam fixing: First, the first lug is welded and fixed at the designed position on the drilling platform.

[0014] The crossbeam is lifted using the crane on the modular drilling rig itself, and the connecting lugs at both ends are aligned with the first lug that has been welded onto the drilling platform.

[0015] Insert the second single taper pin for initial positioning, then install the anti-shear pin to prevent rotation, and finally lock it with a pin to reliably fix the crossbeam to the drill table surface.

[0016] 2) Connection between the strut and the crossbeam: Align one end of the strut with the ear seat in the middle of the crossbeam.

[0017] The strut is hinged to the crossbeam using a first single taper pin, a shear pin, and a safety pin, allowing the strut to rotate about the pin.

[0018] 3) Tower section placement and strut support: Use the same crane to lift the bottom section of the tower piece to the installation position and keep it suspended.

[0019] Bring the other end of the strut (with the second ear) that is already connected to the crossbeam toward the suspended bottom section of the tower, so that the second ear is aligned with the pre-set connection part on the tower section.

[0020] 4) Fastening of the struts to individual tower sections: Use U-bolts to pass through the connection holes of the second lug and the tower monolith.

[0021] Install washers at both ends of the U-bolt and tighten the nuts to securely connect the strut to the base section of the tower as a single unit.

[0022] 5) Forming a stable structure and releasing the crane hook: Once the U-bolts are tightened, the base section of the tower, the crossbeam, and the struts together form a stable triangular support structure. This structure can independently bear the load of the base section of the tower and maintain its stability.

[0023] Once the connection is confirmed to be secure, the crane hook can be safely released. At this point, the installation of the first tower base section is complete.

[0024] 6) Repeated operations and subsequent installation: The crane was moved to the other side, and the second tower base section was installed following the exact same steps (using another set of the same installation equipment).

[0025] Once both bottom sections are installed and stabilized, subsequent tower sectional hoisting or connection operations between the two sections can be carried out.

[0026] The beneficial effects of this utility model are as follows: (1) This utility model greatly improves the stability and positioning accuracy of the installation process by connecting the tower bottom section, crossbeam and strut into a stable triangular support structure. This rigid frame can bear the load independently, effectively offsetting the swaying and swinging that may occur when the single section is in place, so that the tower bottom section can still maintain the accurate design position after the crane releases the hook, laying a reliable foundation for subsequent installation procedures.

[0027] (2) This utility model can complete the efficient installation of the tower base section with only a single crane, which significantly optimizes resource allocation and simplifies the operation process. This device replaces the cumbersome steps of repeated manual traction and adjustment in traditional operations, making single-piece positioning and temporary fixing faster, thereby shortening the installation time, greatly improving the overall operation efficiency, and reducing the comprehensive cost caused by occupying hoisting resources for a long time.

[0028] (3) This utility model fundamentally reduces the safety risks during high-altitude operations and heavy object installation. Its modular design and mechanical connection minimize the need for workers to manually support and make close-range adjustments in high-risk areas. At the same time, the anti-shear pins and locking mechanisms used in key connection parts provide double insurance and effectively prevent safety accidents that may be caused by accidental loosening of equipment under complex working conditions. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial enlargement of the present invention. Figure 1 ; Figure 3 This is a partial enlargement of the present invention. Figure 2 ; In the diagram: 1-crossbeam, 2-first lug, 3-strut, 4-second lug, 5-U-bolt assembly, 6-nut, 7-washer, 8-first single taper pin, 9-shear pin, 10-pin, 11-second single taper pin. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, the present invention provides a single-piece installation device for the bottom section of a marine modular drilling rig tower, including a crossbeam 1, a first lug 2, a strut 3, a second lug 4, a U-bolt assembly 5, a nut 6, a washer 7, a first single taper pin 8, a shear pin 9, a pin 10, and a second single taper pin 11.

[0032] Preparations before installation: First, the first lug 2 is welded and fixed at a predetermined position on the drilling platform. The first lug 2 has a pin hole that matches the second single tapered pin 11. The crossbeam 1 is made of irregular I-beam steel, with connecting lugs at both ends and a closed lifting lug welded to the top for easy hoisting operations.

[0033] Installation of the crossbeam: Using the crane provided with the modular drilling rig, the crossbeam 1 is hoisted to the installation position, aligning the lugs at both ends of the crossbeam 1 with the first lug 2 pre-welded to the drill platform. The second single taper pin 11 is inserted into the aligned pin hole for initial positioning. Then, the anti-shear pin 9 is installed to prevent the second single taper pin 11 from rotating during operation. Finally, the pin 10 is used for final fixation to prevent the pin from falling off.

[0034] Support rod connection: One end of the strut 3 is connected to the lug at the middle of the crossbeam 1 via a first single tapered pin 8. In practice, the first single tapered pin 8 is first passed through the lug at the end of the strut 3 and the lug on the crossbeam 1, then an anti-shear pin 9 is installed to prevent the first single tapered pin 8 from rotating, and finally a safety pin 10 is used for locking. The other end of the strut 3 is welded with a second lug 4, which has a connection structure that matches the U-bolt assembly 5.

[0035] Installation of individual sections at the base of the tower: The base section of the tower is hoisted to the designated installation position using a modular drilling rig and kept suspended. The strut 3, already connected to the crossbeam 1, is brought closer to the base section of the tower, aligning the second lug 4 with the connecting hole on the base section. The U-bolt assembly 5 is passed through the aligned connecting hole, and after installing washers 7 at both ends of the bolt, the nut 6 is tightened to securely connect the strut 3 to the base section of the tower.

[0036] Installation of the triangular stable support structure: Once the U-bolt assembly 5 is tightened, the tower base section, crossbeam 1, and strut 3 form a stable triangular support structure. At this point, the crane hook can be safely released, and this triangular structure can independently maintain the stability of the tower base section.

[0037] Installation of another section of the tower base: Using the same installation methods and steps, another set of installation equipment is used to install the adjacent tower base sections in place. After the two tower base sections are installed, subsequent connection and fixing work can be carried out.

[0038] Disassembly process: During disassembly, proceed in reverse order: first, loosen the nut 6 of the U-bolt assembly 5 to separate the strut 3 from the bottom section of the tower; then, remove the pin 10 and shear pin 9 on the first single cone pin 8, and take out the first single cone pin 8 to separate the strut 3 from the crossbeam 1; finally, remove the pin 10 and shear pin 9 on the second single cone pin 11, and take out the second single cone pin 11, which can then be lifted away from the crossbeam 1.

[0039] Among them, the crossbeam 1 is made of Q355D low alloy high strength structural steel, which has sufficient strength and rigidity; All pin-type parts are made of 40Cr alloy steel and have undergone quenching and tempering treatment; The U-bolt assembly 5 uses 8.8 grade high-strength bolts and is used in conjunction with elastic washers 7 to prevent loosening during operation.

[0040] In practical applications, this device can effectively support single sections of the tower base weighing 8-10 tons, achieving precise positioning under single crane operation conditions. The installation time is reduced by about 50% compared to traditional methods, and it completely avoids manual support operations by high-altitude workers, significantly improving the safety of installation operations.

[0041] This invention is not only applicable to the installation of the bottom section of the marine modular drilling rig tower, but can also be extended to the installation of other large truss panels with similar structures, and has wide applicability and good promotional value.

[0042] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, based on the technical teachings provided by this utility model and as common knowledge in the mechanical field, other equivalent modifications and improvements can be made, and these should also be considered within the scope of protection of this utility model.

Claims

1. A monolithic installation apparatus for a sea module rig tower bottom section, characterized by: The crossbeam (1) is fixed to the drilling platform by a first ear seat (2) and a second single taper pin (11). A strut (3) is connected to the crossbeam (1), and the strut (3) is connected to the crossbeam (1) by a first single taper pin (8), a shear pin (9) and a pin (10). The other end of the strut (3) is provided with a second ear seat (4), and the second ear seat (4) is connected to the bottom section of the tower by a U-bolt assembly (5), a nut (6) and a washer (7).

2. A single piece installation apparatus for a bottom section of a tower of an offshore module rig as claimed in claim 1, characterized in that: The crossbeam (1) is an irregular I-beam with connecting lugs at both ends, and a closed lifting lug is welded to its upper part.

3. A single piece installation device for a bottom section of a tower of an offshore module rig according to claim 1 or 2, characterized in that: The first ear seat (2) is welded to the drill table surface and is fixedly connected to the crossbeam (1) by the second single cone pin (11), the anti-shear pin (9) and the pin (10).

4. A single piece installation apparatus for a bottom section of a tower of an offshore module rig as defined in claim 3, characterized in that: The strut (3) is connected to the lug at the middle part of the crossbeam (1) via a first single taper pin (8), a shear pin (9) and a pin (10).

5. A single piece installation apparatus for a bottom section of a marine module rig tower according to claim 4, characterized in that: The second ear seat (4) is welded to the end of the strut (3) and is fastened to the bottom section of the tower by a U-bolt assembly (5), a nut (6) and a washer (7).

6. A single piece installation apparatus for a base section of a marine module rig tower according to claim 5, characterised in that: The U-bolt assembly (5) passes through the connection hole of the single piece at the bottom of the tower and is locked and fixed by nuts (6) and washers (7).

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