Door-shaped derrick mounting method for drilling platform

Abstract

The invention discloses a door-shaped derrick mounting method for a drilling platform, which comprises the following steps of: firstly, carrying out segmented design on a door-shaped derrick according to a drawing of the door-shaped derrick and a preset elevation segmentation standard to obtain an upper section of the door-shaped derrick and a lower section of the door-shaped derrick; processing the door-shaped derrick upper section and the door-shaped derrick lower section to form a door-shaped derrick assembly; auxiliary equipment is sequentially installed on the door type derrick assembly, and a hoisting state is achieved; and finally, hoisting the door-shaped derrick assembly to be horizontal, then lifting the upper section of the door-shaped derrick and lowering the lower section of the door-shaped derrick until the door-shaped derrick assembly is in a vertical state through hoisting equipment, and fixing the bottom of the lower section of the door-shaped derrick to complete the installation of the door-shaped derrick. The problems that in the prior art, the time for installing a door-shaped derrick on a drilling platform is unstable, and the safety risk is large are solved.

Description

Technical Field

[0001] This invention belongs to the field of offshore drilling equipment technology, specifically relating to a method for installing a portal derrick for drilling platforms. Background Technology

[0002] In oil drilling, mining, and other operations, portal derricks serve as a crucial component of hoisting systems, using winches and other equipment to lift and lower drill pipes, tubing, casing, and various tools. They can withstand significant weight and load, ensuring both efficiency and safety during operations.

[0003] Currently, portal derricks are assembled vertically in sections from bottom to top at high altitudes, requiring multiple people to ride in aerial work platforms for installation. The installation process is almost entirely conducted at height, and parallel work is not allowed. Cranes and aerial work platforms are needed for assistance at all times during installation. There are requirements for the qualifications of installation personnel, such as high-altitude work permits and personnel carrier operator licenses. This results in low installation efficiency, high costs, and high safety risks associated with working at heights.

[0004] If a portal derrick is installed on a drilling platform using a vertical, bottom-up, segmented method, the platform must first have sufficient lifting capacity. Secondly, weather conditions and sea conditions must be considered, making the installation time uncertain and potentially extending the production cycle. Furthermore, lifting equipment resources on drilling platforms are usually limited, and the prolonged use of such equipment for portal derrick installation can reduce the efficiency of other necessary lifting equipment. Additionally, the installation process requires multiple people to work at heights, and prolonged high-altitude work at sea poses significant safety risks. Summary of the Invention

[0005] The purpose of this invention is to provide a method for installing portal derricks on drilling platforms, which solves the problems of unstable installation time and high safety risks in the prior art.

[0006] The technical solution adopted in this invention is a method for installing a portal derrick for drilling platforms, specifically including the following steps: Step 1: Based on the drawings of the portal derrick, and according to the preset elevation segmentation standard, the portal derrick is segmented to obtain the upper section and the lower section of the portal derrick. Step 2: Process and fix the lifting lugs on the upper and lower sections of the portal derrick; Step 3: Place the upper and lower sections of the portal derrick horizontally onto the support fixture and connect and fix them together to form the portal derrick assembly; Step 4: Install the auxiliary equipment onto the gantry assembly in sequence to achieve the hoisting state; Step 5: Using hoisting equipment, first lift the portal derrick assembly to a horizontal position, then raise the upper section of the portal derrick and lower the lower section until the portal derrick assembly is in a vertical position. Then fix the bottom of the lower section of the portal derrick to complete the installation of the portal derrick.

[0007] The invention is further characterized in that, In step 1, based on the drawings of the portal derrick, the portal derrick is segmented according to the preset elevation segmentation standard. Specifically, the portal derrick is segmented according to the drawings and the preset elevation segmentation standard, so that the elevation and weight of the upper and lower sections of each portal derrick meet the load-bearing and hoisting elevation requirements of the hoisting equipment.

[0008] In step 2, the upper and lower sections of the portal derrick are processed and fixed with lifting lugs. Specifically, lifting lugs are welded to the top of the upper section of the portal derrick, and lifting lugs are welded to the side of the lower section of the portal derrick near the bottom.

[0009] Step 3 specifically includes the following steps: S301, the upper section and the lower section of the portal derrick are fixedly connected by connecting blocks to form a single-sided portal derrick, in which the bottom of the upper section and the top of the lower section of the portal derrick are set opposite to each other; S302, repeat S301 to obtain a pair of single-sided portal derricks, place the pair of single-sided portal derricks laterally opposite each other and horizontally on the surface of the support fixture; S303 uses connecting beams to connect the middle parts of opposite single-sided portal frames, and the bottom of the single-sided portal frames on both sides are connected by bolts to fixed tooling connecting rods. S304, the tops of the single-sided portal derricks on both sides are connected to each other by connecting frames to form a portal derrick assembly.

[0010] The two ends of the connecting beam and the connecting frame are fixedly connected to the corresponding single-sided portal frame by bolts.

[0011] In step 4, the auxiliary equipment is installed onto the portal frame assembly in sequence to achieve the hoisting state. The auxiliary equipment specifically includes lifting cylinders, guide pulleys, base plate retraction guide pulleys, high-pressure riser manifold, hydraulic unit, large tongs counterweight, drilling wire rope and accessories. When installing auxiliary equipment, install the larger parts first and then the smaller parts in sequence. After the auxiliary equipment is installed, set up the corresponding support fixtures 4 below the auxiliary equipment.

[0012] The accessories include lighting, cameras, and cables.

[0013] Step 5 specifically includes the following steps: S501, connect the top sling fixed to one end of the lifting beam to the lifting lug fixed on the upper section of the portal frame, and connect the tail sling fixed to the other end of the lifting beam to the lifting lug fixed on the lower section of the portal frame; S502, hang the lifting beam slings fixed on the lifting beam on the hook of the lifting equipment, and start the lifting equipment to lift the portal frame assembly horizontally to the rotation height; S503, tighten the top slings to lift the upper section of the gantry derrick, and at the same time loosen the tail slings to lower the lower section of the gantry derrick until the gantry derrick assembly is in a vertical position; S504, fix the lower end of the portal derrick assembly, remove the fixing tooling connecting rod, and complete the installation of the portal derrick.

[0014] The rotation height is the distance from the midpoint between the connecting line between the lifting lug on the upper section of the portal derrick and the lifting lug on the lower section of the portal derrick to the bottom of the portal derrick assembly.

[0015] The beneficial effects of this invention are: (1) The portal derrick installation method of the present invention for drilling platforms divides the portal derrick into an upper section and a lower section, and adopts a horizontal mounting form for the upper and lower sections. During the installation, weather conditions during operation are not a concern. During the horizontal mounting, the lifting cylinder, guide pulley, base plate retraction guide pulley, high-pressure riser manifold, hydraulic unit, large tong counterweight, drilling wire rope and accessories are directly connected and fixed to the portal derrick assembly. This allows the operators to install the auxiliary equipment of the derrick directly on the drilling platform, reducing the risk during installation.

[0016] (2) The portal derrick installation method of the present invention for drilling platforms can complete the installation of the portal derrick by lifting the entire portal derrick assembly and rotating it after the overall horizontal installation is completed. The time occupied by the lifting equipment is short, which improves the efficiency of the overall operation on the drilling platform. Secondly, it reduces the risk of long-term high-altitude operation for workers and ensures personal safety.

[0017] (3) The portal frame installation method of the present invention for drilling platforms can effectively avoid the deformation caused by gravity when the auxiliary equipment is in a horizontal state due to the weight of the auxiliary equipment itself by setting support fixtures under each auxiliary equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the horizontal mounting method of the upper and lower sections of the portal derrick in the portal derrick installation method for drilling platforms of the present invention; Figure 2 This is a schematic diagram of the horizontal mounting of the portal derrick body in the portal derrick installation method for drilling platforms according to the present invention; Figure 3This is a schematic diagram of the horizontal mounting of the portal derrick assembly in the portal derrick installation method for drilling platforms of the present invention; Figure 4 This is a schematic diagram of the horizontal mounting of the portal derrick accessory in the portal derrick installation method for drilling platforms according to the present invention; Figure 5 This is a front view of the portal derrick assembly being lifted in the portal derrick installation method for drilling platforms according to the present invention; Figure 6 This is a side view of the portal derrick assembly being lifted in the portal derrick installation method for drilling platforms according to the present invention; Figure 7 This is a schematic diagram of the overall hoisting of the portal derrick assembly in the portal derrick installation method for drilling platforms according to the present invention.

[0019] In the diagram, 1. Upper section of the portal derrick, 2. Connecting block, 3. Lower section of the portal derrick, 4. Support fixture, 5. Connecting beam, 6. Fixing fixture connecting rod, 7. Connecting frame, 8. Guide pulley, 9. Lifting cylinder, 10. Base plate retraction guide pulley, 11. Hydraulic unit, 12. High-pressure riser manifold, 13. Large tong counterweight, 14. Drilling wire rope, 15. Top lifting sling, 16. Tail lifting sling, 17. Lifting beam, 18. Lifting beam lifting sling. Detailed Implementation

[0020] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0021] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0022] Example 1 The present invention provides a method for installing a portal derrick on a drilling platform, specifically comprising the following steps: Step 1: Based on the drawings of the portal derrick, design the portal derrick into sections according to the preset elevation segmentation standard.

[0023] Specifically, the portal derrick is divided into multiple segments along the vertical direction to obtain derrick segments. The number of derrick segments can be determined according to the actual elevation and weight of the portal derrick. In this embodiment, the portal derrick is divided into upper portal derrick segment 1 and lower portal derrick segment 3.

[0024] Based on the drawings of the portal derrick, the portal derrick is segmented according to the preset elevation segmentation standard, so that the elevation and weight of the upper section 1 and the lower section 3 of each portal derrick meet the load-bearing and lifting elevation requirements of the hoisting equipment.

[0025] Specifically, the preferred hoisting equipment is a crane, which is a commonly used hoisting equipment in this field. Based on the crane's load-bearing capacity and the maximum hoisting height it can withstand, a pre-set standard for elevation segmentation is established to ensure that the elevation and weight of each derrick section meet the load-bearing capacity and hoisting height requirements of the hoisting equipment, thereby avoiding safety hazards.

[0026] At the same time, when dividing the drilling platform into sections, the load-bearing capacity and space of the drilling platform must be taken into account to ensure that the drilling platform can accommodate the divided derrick sections for installation.

[0027] Step 2: Process and fix the lifting lugs on the upper section 1 and lower section 3 of the portal derrick. Specifically, in this embodiment, a lifting lug is welded to the top of the upper section 1 of the portal derrick, and a lifting lug is welded to the side of the lower section 3 of the portal derrick near the bottom. The position and strength of the lug plates meet the requirements for both horizontal and vertical hoisting of the portal derrick after horizontal assembly.

[0028] Step 3: Place the upper section 1 and lower section 3 of the portal derrick horizontally onto the support fixture 4 and connect and fix them to each other to form the portal derrick assembly; Furthermore, the supporting fixtures for the upper section 1 and lower section 3 of the portal derrick consist of support frames and diagonal braces. The support frames are typically made of steel, possessing high strength and rigidity, and can be customized according to the shape and size of the derrick to ensure a close fit. The support frames may also be equipped with adjusting bolts and other components for further adjustment of the derrick's position. The diagonal braces provide lateral support to prevent the derrick from tipping over during installation and are generally made of steel or other robust materials. The angle and length of the diagonal braces can be adjusted according to the height and stability requirements of the derrick.

[0029] Step 4: Install the auxiliary equipment onto the gantry assembly in sequence to achieve the hoisting state; Step 5: Using hoisting equipment, first lift the portal derrick assembly to a horizontal position, then raise the upper section 1 of the portal derrick and lower the lower section 3 until the portal derrick assembly is in a vertical position. Then fix the bottom of the lower section 3 of the portal derrick to complete the installation of the portal derrick.

[0030] Example 2 The present invention provides a method for installing a portal derrick on a drilling platform, specifically comprising the following steps: Step 1: Based on the drawings of the portal derrick, design the portal derrick into sections according to the preset elevation segmentation standard.

[0031] Specifically, the portal derrick is divided into multiple segments along the vertical direction to obtain derrick segments. The number of derrick segments can be determined according to the actual elevation and weight of the portal derrick. In this embodiment, the portal derrick is divided into upper portal derrick segment 1 and lower portal derrick segment 3.

[0032] Based on the drawings of the portal derrick, the portal derrick is segmented according to the preset elevation segmentation standard, so that the elevation and weight of the upper section 1 and the lower section 3 of each portal derrick meet the load-bearing and lifting elevation requirements of the hoisting equipment.

[0033] Step 2: Process and fix the lifting lugs on the upper section 1 and lower section 3 of the portal derrick. Specifically, in this embodiment, a lifting lug is welded to the top of the upper section 1 of the portal derrick, and a lifting lug is welded to the side of the lower section 3 of the portal derrick near the bottom. The position and strength of the lug plates meet the requirements for both horizontal and vertical hoisting of the portal derrick after horizontal assembly.

[0034] Step 3: Place the upper section 1 and lower section 3 of the portal derrick horizontally onto the support fixture 4 and connect and fix them to each other to form the portal derrick assembly; Furthermore, the supporting fixtures for the upper section 1 and lower section 3 of the portal derrick are support frames and diagonal braces.

[0035] Step 3 specifically includes the following steps: S301, such as Figure 1 As shown, the upper section 1 and the lower section 3 of the portal derrick are fixedly connected by the connecting block 2 to form a single-sided portal derrick. In the single-sided portal derrick, the bottom of the upper section 1 and the top of the lower section 3 are set opposite to each other. Specifically, the connecting block 2 can be fixedly connected to the upper section 1 and lower section 3 of the portal derrick using bolts, or it can be fixed by welding. When using bolts for fixing, the upper section 1 and lower section 3 of the portal derrick need to have through holes machined relative to the installation position of the connecting block 2 for the bolts to pass through.

[0036] S302, repeating S301, yields a pair of single-sided portal derricks, such as Figure 2 As shown, a pair of single-sided portal frames are placed sideways to side and horizontally on the surface of the support fixture. S303 uses a connecting beam 5 to connect the middle parts of the opposite single-sided portal derricks to each other, and the bottom of the single-sided portal derricks on both sides is connected by bolts to a fixing tooling connecting rod 6. As a preferred embodiment of the present invention, the two ends of the connecting beam 5 are respectively fixedly connected to the corresponding single-sided portal frame by bolts.

[0037] S304, such as Figure 3 As shown, the tops of the single-sided portal derricks on both sides are connected to each other by connecting frames 7 to form a portal derrick assembly.

[0038] As a preferred embodiment of the present invention, the two ends of the connecting frame 7 are respectively fixedly connected to the corresponding single-sided portal frame by bolts.

[0039] Step 4: Install the auxiliary equipment onto the gantry assembly in sequence to achieve the hoisting state; Step 5: Using hoisting equipment, first lift the portal derrick assembly to a horizontal position, then raise the upper section 1 of the portal derrick and lower the lower section 3 until the portal derrick assembly is in a vertical position. Then fix the bottom of the lower section 3 of the portal derrick to complete the installation of the portal derrick.

[0040] Example 3 The present invention provides a method for installing a portal derrick on a drilling platform, specifically comprising the following steps: Step 1: Based on the drawings of the portal derrick, design the portal derrick into sections according to the preset elevation segmentation standard.

[0041] Specifically, the portal derrick is divided into multiple segments along the vertical direction to obtain derrick segments. The number of derrick segments can be determined according to the actual elevation and weight of the portal derrick. In this embodiment, the portal derrick is divided into upper portal derrick segment 1 and lower portal derrick segment 3.

[0042] Based on the drawings of the portal derrick, the portal derrick is segmented according to the preset elevation segmentation standard, so that the elevation and weight of the upper section 1 and the lower section 3 of each portal derrick meet the load-bearing and lifting elevation requirements of the hoisting equipment.

[0043] Step 2: Process and fix the lifting lugs on the upper section 1 and lower section 3 of the portal derrick. Specifically, in this embodiment, a lifting lug is welded to the top of the upper section 1 of the portal derrick, and a lifting lug is welded to the side of the lower section 3 of the portal derrick near the bottom. The position and strength of the lug plates meet the requirements for both horizontal and vertical hoisting of the portal derrick after horizontal assembly.

[0044] Step 3: Place the upper section 1 and lower section 3 of the portal derrick horizontally onto the support fixture 4 and connect and fix them to each other to form the portal derrick assembly; Furthermore, the supporting fixtures for the upper section 1 and lower section 3 of the portal derrick are support frames and diagonal braces.

[0045] Step 3 specifically includes the following steps: S301, the upper section 1 and the lower section 3 of the portal derrick are fixedly connected by the connecting block 2 to form a single-sided portal derrick, in which the bottom of the upper section 1 and the top of the lower section 3 of the portal derrick are set opposite to each other; Specifically, the connecting block 2 can be fixedly connected to the upper section 1 and the lower section 3 of the portal frame by bolts, or it can be fixed by welding.

[0046] S302, repeat S301 to obtain a pair of single-sided portal derricks, place the pair of single-sided portal derricks laterally opposite each other and horizontally on the surface of the support fixture; S303 uses a connecting beam 5 to connect the middle parts of the opposite single-sided portal derricks to each other, and the bottom of the single-sided portal derricks on both sides is connected by bolts to a fixing tooling connecting rod 6. S304, the tops of the single-sided portal derricks on both sides are connected to each other by connecting frame 7 to form a portal derrick assembly.

[0047] Step 4: Install the auxiliary equipment onto the gantry assembly in the order of larger components first, followed by smaller components, to achieve the hoisting state; like Figure 4 As shown, the auxiliary equipment specifically includes lifting cylinder 9, guide pulley 8, base plate retraction guide pulley 10, high-pressure riser manifold 12, hydraulic unit 11, large tong counterweight 13, drilling wire rope 14 and accessories; The accessories include lighting, cameras, and cables.

[0048] Step 5: Using hoisting equipment, first lift the portal derrick assembly to a horizontal position, then raise the upper section 1 of the portal derrick and lower the lower section 3 until the portal derrick assembly is in a vertical position. Then fix the bottom of the lower section 3 of the portal derrick to complete the installation of the portal derrick.

[0049] Example 4 The present invention provides a method for installing a portal derrick on a drilling platform, specifically comprising the following steps: Step 1: Based on the drawings of the portal derrick, design the portal derrick into sections according to the preset elevation segmentation standard.

[0050] Specifically, the portal derrick is divided into multiple segments along the vertical direction to obtain derrick segments. The number of derrick segments can be determined according to the actual elevation and weight of the portal derrick. In this embodiment, the portal derrick is divided into upper portal derrick segment 1 and lower portal derrick segment 3.

[0051] Based on the drawings of the portal derrick, the portal derrick is segmented according to the preset elevation segmentation standard, so that the elevation and weight of the upper section 1 and the lower section 3 of each portal derrick meet the load-bearing and lifting elevation requirements of the hoisting equipment.

[0052] Step 2: Process and fix the lifting lugs on the upper section 1 and lower section 3 of the portal derrick. Specifically, in this embodiment, a lifting lug is welded to the top of the upper section 1 of the portal derrick, and a lifting lug is welded to the side of the lower section 3 of the portal derrick near the bottom. The position and strength of the lug plates meet the requirements for both horizontal and vertical hoisting of the portal derrick after horizontal assembly.

[0053] Step 3: Place the upper section 1 and lower section 3 of the portal derrick horizontally onto the support fixture 4 and connect and fix them to each other to form the portal derrick assembly; Step 3 specifically includes the following steps: S301, the upper section 1 and the lower section 3 of the portal derrick are fixedly connected by the connecting block 2 to form a single-sided portal derrick, in which the bottom of the upper section 1 and the top of the lower section 3 of the portal derrick are set opposite to each other; Specifically, the connecting block 2 can be fixedly connected to the upper section 1 and the lower section 3 of the portal frame by bolts, or it can be fixed by welding.

[0054] S302, repeat S301 to obtain a pair of single-sided portal derricks, place the pair of single-sided portal derricks laterally opposite each other and horizontally on the surface of the support fixture; S303 uses a connecting beam 5 to connect the middle parts of the opposite single-sided portal derricks to each other, and the bottom of the single-sided portal derricks on both sides is connected by bolts to a fixing tooling connecting rod 6. S304, the tops of the single-sided portal derricks on both sides are connected to each other by connecting frame 7 to form a portal derrick assembly.

[0055] Step 4: Install the auxiliary equipment onto the gantry assembly in the order of larger components first, followed by smaller components, to achieve the hoisting state; The auxiliary equipment specifically includes lifting cylinder 9, guide pulley 8, base plate retraction guide pulley 10, high-pressure riser manifold 12, hydraulic unit 11, large tong counterweight 13, drilling wire rope 14 and accessories; The accessories include lighting, cameras, and cables.

[0056] The base plate retraction guide pulley 10 is a pulley device used to assist in the retraction and deployment of the base plate. In marine geological exploration, the seabed exploration base plate needs to be lowered to the seabed for drilling and sampling operations. The base plate retraction guide pulley is used to guide the direction of the wire rope, ensuring that the base plate maintains a stable posture and correct position during the retraction and deployment process, preventing the base plate from tilting or shaking, thereby ensuring stable drilling and accurate positioning of the drill string.

[0057] Hydraulic unit 11 mainly includes the following parts: A hydraulic pump is the power source of a hydraulic system, which converts mechanical energy into hydraulic energy.

[0058] Hydraulic cylinders are actuators that convert hydraulic energy into mechanical energy, used to achieve linear motion of various components on a derrick.

[0059] A hydraulic motor is a rotary actuator that converts hydraulic energy into mechanical energy. On drilling platform derricks, hydraulic motors are used to drive equipment that requires rotational movement, such as winches and rotary tables.

[0060] Hydraulic control valves are used to control the pressure, flow, and direction of hydraulic oil in a hydraulic system to achieve precise control of hydraulic actuators.

[0061] A hydraulic oil tank is used to store hydraulic oil and also serves to dissipate heat, separate air and impurities.

[0062] Hydraulic fittings, including oil pipes and pipe fittings, are used to connect various components in a hydraulic system to form a complete hydraulic circuit.

[0063] After the auxiliary equipment is installed, a corresponding support fixture 4 is set up below the auxiliary equipment. The support fixture 4 here can be any one of the following: wooden blocks, jacks, sleepers, or support frames.

[0064] Wooden blocks and sleepers are placed under the auxiliary equipment to provide support and stability, preventing the equipment from directly contacting the ground and being damaged. They also distribute the weight of the auxiliary equipment, avoiding excessive localized pressure that could deform the connection between the auxiliary equipment and the derrick, thus preventing damage to the auxiliary equipment.

[0065] Jacks can be adjusted according to the height of the auxiliary equipment, making them more flexible, but the force-bearing area at the top of the jack is relatively small.

[0066] Step 5: Using hoisting equipment, first lift the portal derrick assembly to a horizontal position, then raise the upper section 1 of the portal derrick and lower the lower section 3 until the portal derrick assembly is in a vertical position. Then fix the bottom of the lower section 3 of the portal derrick to complete the installation of the portal derrick.

[0067] Example 5 The present invention provides a method for installing a portal derrick on a drilling platform, specifically comprising the following steps: Step 1: Based on the drawings of the portal derrick, design the portal derrick into sections according to the preset elevation segmentation standard.

[0068] Specifically, the portal derrick is divided into multiple segments along the vertical direction to obtain derrick segments. The number of derrick segments can be determined according to the actual elevation and weight of the portal derrick. In this embodiment, the portal derrick is divided into upper portal derrick segment 1 and lower portal derrick segment 3.

[0069] Based on the drawings of the portal derrick, the portal derrick is segmented according to the preset elevation segmentation standard, so that the elevation and weight of the upper section 1 and the lower section 3 of each portal derrick meet the load-bearing and lifting elevation requirements of the hoisting equipment.

[0070] Step 2: Process and fix the lifting lugs on the upper section 1 and lower section 3 of the portal derrick. Specifically, in this embodiment, a lifting lug is welded to the top of the upper section 1 of the portal derrick, and a lifting lug is welded to the side of the lower section 3 of the portal derrick near the bottom. The position and strength of the lug plates meet the requirements for both horizontal and vertical hoisting of the portal derrick after horizontal assembly.

[0071] Step 3: Place the upper section 1 and lower section 3 of the portal derrick horizontally onto the support fixture 4 and connect and fix them to each other to form the portal derrick assembly; Step 3 specifically includes the following steps: S301, the upper section 1 and the lower section 3 of the portal derrick are fixedly connected by the connecting block 2 to form a single-sided portal derrick, in which the bottom of the upper section 1 and the top of the lower section 3 of the portal derrick are set opposite to each other; Specifically, the connecting block 2 can be fixedly connected to the upper section 1 and the lower section 3 of the portal frame by bolts, or it can be fixed by welding.

[0072] S302, repeat S301 to obtain a pair of single-sided portal derricks, place the pair of single-sided portal derricks laterally opposite each other and horizontally on the surface of the support fixture; S303 uses a connecting beam 5 to connect the middle parts of the opposite single-sided portal derricks to each other, and the bottom of the single-sided portal derricks on both sides is connected by bolts to a fixing tooling connecting rod 6. S304, the tops of the single-sided portal derricks on both sides are connected to each other by connecting frame 7 to form a portal derrick assembly.

[0073] Step 4: Install the auxiliary equipment onto the gantry assembly in the order of larger components first, followed by smaller components, to achieve the hoisting state; The auxiliary equipment specifically includes lifting cylinder 9, guide pulley 8, base plate retraction guide pulley 10, high-pressure riser manifold 12, hydraulic unit 11, large tong counterweight 13, drilling wire rope 14 and accessories; The accessories include lighting, cameras, and cables.

[0074] Step 5: Using hoisting equipment, first lift the portal derrick assembly to a horizontal position, then raise the upper section 1 of the portal derrick and lower the lower section 3 until the portal derrick assembly is in a vertical position. Then fix the bottom of the lower section 3 of the portal derrick to complete the installation of the portal derrick.

[0075] Step 5 specifically includes the following steps: S501, such as Figure 5As shown, the top sling 15 fixed to one end of the lifting beam 17 is connected to the lifting lug fixed on the upper section 1 of the portal frame, and the tail sling 16 fixed to the other end of the lifting beam 17 is connected to the lifting lug fixed on the lower section 3 of the portal frame. S502, such as Figure 6 As shown, the lifting beam sling 18 fixed on the lifting beam 17 is hung on the hook of the lifting equipment, and the lifting equipment is started to lift the portal frame assembly horizontally to the rotation height; S503, tighten the top sling 15 to lift the upper section 1 of the gantry derrick, and simultaneously loosen the tail sling 16 to lower the lower section 3 of the gantry derrick. Figure 7 As shown, until the portal frame assembly is in a vertical position; S504, fix the lower end of the portal derrick assembly, remove the fixing tooling connecting rod 6, and complete the installation of the portal derrick.

[0076] The top sling 15 and the tail sling 16 used in this embodiment have adjustable length functions and are made of chain slings or wire rope slings.

[0077] A chain sling with an adjusting ring can change the effective working length of the sling by altering the position of the adjusting ring on the chain.

[0078] Wire rope slings are length-adjustable via turnbuckles (turnbuckles) attached to their ends. Turnbuckles typically consist of left-hand and right-hand threaded rods; rotating the adjusting nut in the center allows both rods to retract or extend simultaneously, thus changing the effective length of the wire rope sling.

[0079] Example 6 Based on Example 5, in the portal derrick installation method for drilling platforms of the present invention, in order to ensure that when tightening the top sling 15 to lift the upper section 1 of the portal derrick and simultaneously loosening the tail sling 16 to lower the lower section 3 of the portal derrick, the final portal derrick assembly can be in a vertical state. In step S502, the rotation height is the distance from the midpoint between the connecting line between the lifting lug on the upper section 1 of the portal derrick and the lifting lug on the lower section 3 of the portal derrick to the bottom of the portal derrick assembly.

[0080] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0081] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0082] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for installing a portal derrick for drilling platforms, characterized in that, Specifically, the following steps are included: Step 1: According to the drawings of the portal derrick, the portal derrick is segmented according to the preset elevation segmentation standard to obtain the upper section (1) and the lower section (3) of the portal derrick. Step 2: Process and fix the lifting lugs on the upper section (1) and lower section (3) of the portal derrick; Step 3: Place the upper section (1) and lower section (3) of the portal derrick horizontally onto the support fixture (4) and connect and fix them to each other to form the portal derrick assembly; Step 4: Install the auxiliary equipment onto the gantry assembly in sequence to achieve the hoisting state; Step 5: Using hoisting equipment, first lift the portal derrick assembly to a horizontal position, then lift the upper section (1) of the portal derrick and lower the lower section (3) until the portal derrick assembly is in a vertical position. Then fix the bottom of the lower section (3) of the portal derrick to complete the installation of the portal derrick.

2. The method for installing a portal derrick for a drilling platform according to claim 1, characterized in that, In step 1, according to the drawings of the portal derrick, the portal derrick is segmented according to the preset elevation segmentation standard. Specifically, the portal derrick is segmented according to the drawings of the portal derrick and the preset elevation segmentation standard, so that the elevation and weight of each upper section (1) and lower section (3) of the portal derrick meet the load-bearing and hoisting elevation requirements of the hoisting equipment.

3. The method for installing a portal derrick for a drilling platform according to claim 1, characterized in that, In step 2, the processing and fixing of the lifting lugs on the upper section (1) and lower section (3) of the portal derrick is specifically as follows: the upper section (1) of the portal derrick is fixed with a lifting lug by welding at the top position, and the lower section (3) of the portal derrick is fixed with a lifting lug by welding at the side position near the bottom position.

4. The method for installing a portal derrick for a drilling platform according to claim 1, characterized in that, Step 3 specifically includes the following steps: S301, the upper section (1) and the lower section (3) of the portal derrick are fixedly connected by the connecting block (2) to form a single-sided portal derrick. The bottom of the upper section (1) and the top of the lower section (3) of the portal derrick are set opposite to each other in the single-sided portal derrick. S302, repeat S301 to obtain a pair of single-sided portal derricks, place the pair of single-sided portal derricks laterally opposite each other and horizontally on the surface of the support fixture; S303, the middle parts of the opposite single-sided portal frame are connected by a connecting beam (5), and the bottom of the single-sided portal frame on both sides is connected by bolts with a fixing tooling connecting rod (6). S304, the tops of the single-sided portal derricks on both sides are connected to each other by a connecting frame (7) to form a portal derrick assembly.

5. The method for installing a portal derrick for a drilling platform according to claim 4, characterized in that, The two ends of the connecting beam (5) and the connecting frame (7) are respectively fixedly connected to the corresponding single-sided portal frame by bolts.

6. The method for installing a portal derrick for a drilling platform according to claim 1, characterized in that, In step 4, the auxiliary equipment is installed sequentially onto the portal frame assembly to achieve the hoisting state. The auxiliary equipment specifically includes a lifting cylinder (9), a guide pulley (8), a base plate retraction guide pulley (10), a high-pressure riser manifold (12), a hydraulic unit (11), a large tong counterweight (13), a drilling wire rope (14), and accessories. When installing auxiliary equipment, install the larger parts first and then the smaller parts in sequence. After the auxiliary equipment is installed, set up the corresponding support fixtures 4 below the auxiliary equipment.

7. The method for installing a portal derrick for a drilling platform according to claim 6, characterized in that, The accessories include lighting, cameras, and cables.

8. The method for installing a portal derrick for a drilling platform according to claim 1, characterized in that, Step 5 specifically includes the following steps: S501, connect the top sling (15) fixed at one end of the lifting beam (17) to the lug fixed on the upper section (1) of the portal frame, and connect the tail sling (16) fixed at the other end of the lifting beam (17) to the lug fixed on the lower section (3) of the portal frame. S502, hang the lifting beam sling (18) fixed on the lifting beam (17) on the hook of the lifting equipment, and start the lifting equipment to lift the portal frame assembly horizontally to the rotation height; S503, tighten the top sling (15) to lift the upper section (1) of the portal derrick, and at the same time loosen the tail sling (16) to lower the lower section (3) of the portal derrick until the portal derrick assembly is in a vertical state; S504, fix the lower end of the portal frame assembly, remove the fixing tooling connecting rod (6), and complete the installation of the portal frame.

9. The method for installing a portal derrick for a drilling platform according to claim 8, characterized in that, The rotation height is the distance from the midpoint between the connecting line between the lug on the upper section (1) of the portal derrick and the lug on the lower section (3) of the portal derrick to the bottom of the portal derrick assembly.

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