Traction type large drilling platform

Abstract

The invention relates to the field of land petroleum and natural gas drilling and repairing equipment, and discloses a traction type large drilling platform. The core structure comprises a combined sledge seat, a rotary lifting upright post, a power platform body, a moving and lifting guide rail, an operation bay platform, a platform body inclined support rod, a derrick foundation sledge, a detachable traction gooseneck, a detachable traction tailstock and an integral moving control system. A six-stand-column rotary lifting structure and a multi-module combined skid seat design are innovatively adopted, the device is suitable for large-wellhead operation scenes not smaller than 3 m * 3 m, the clearance height from a rotary table beam to the ground can reach 8 m or above, and the operation table top is expanded to 7 m * 15 m or above; by means of the detachable traction assembly and the two-way steering system, the two modes of high-position overall moving and low-position folding moving are achieved, and equipment on the table top does not need to be detached during transition. The problems that an existing drilling platform is narrow in wellhead space, limited in transportation, low in transition efficiency and the like are effectively solved, the modularization degree is high, safety and reliability are high, and the platform is suitable for various kinds of land oil and gas drilling and workover operation.

Description

Technical Field

[0001] This invention belongs to the field of onshore oil and gas drilling and repair equipment manufacturing, specifically relating to a towable large drilling platform suitable for oil and gas drilling and repair operations. It can realize the installation of the rotary table, drill pipe, drill collar and wellhead tools, provide wellhead equipment installation space and operation platform, and can also be arranged with functional areas such as driller's control room, personnel rest room and tool storage room. Background Technology

[0002] As the depth of onshore oil well drilling continues to increase and operational safety standards are constantly being upgraded, higher requirements are being placed on the working space at the wellhead. On the one hand, the drilling platform base needs to be wide enough to accommodate the installation and operation of large wellhead equipment; on the other hand, the clearance height from the rotary table beam to the ground needs to be further increased to provide sufficient installation space for large safety equipment such as wellhead blowout preventer assemblies. Current mainstream truck-mounted oil drilling and workover platforms are no longer sufficient to meet the operational needs of the new situation in terms of core parameters such as base width and clearance height. They also suffer from problems such as insufficient modular design, cumbersome equipment disassembly procedures during relocation, poor transportation flexibility, and high labor intensity on-site, seriously affecting drilling efficiency and relocation convenience. Therefore, innovative optimization of the drilling platform structure is urgently needed. Summary of the Invention

[0003] Purpose of the invention: To address the shortcomings of existing technologies, this invention provides a towable large drilling platform that meets the core requirements of large wellhead operations and the installation space for large safety devices. At the same time, it enables rapid relocation and flexible turning of the platform as a whole, improving operational efficiency and ease of relocation, and reducing on-site labor intensity.

[0004] Technical solution: A towable large drilling platform, the core of which consists of a combined skid, a lifting column, a power platform, a moving guide rail, a working platform, platform diagonal bracing rods, a derrick foundation skid, a detachable towing gooseneck, a detachable towing tailstock, and an overall relocation control system. All components work together to achieve operation and transportation functions.

[0005] 1. Core structural design

[0006] Modular Skid: Employing a multi-module splicing design, the modules are securely connected via V-blocks and dedicated double pins. The modules are constructed from spliced ​​H-beams and composite beams, combining high strength and bending resistance. This design is suitable for wellhead operations of at least 3 meters x 3 meters and complies with domestic non-overweight transport standards. The modular skid integrates an extension skid, which utilizes an H-beam frame modular design. This effectively expands the hinge angle and grounding coverage of the platform's diagonal braces, ensuring structural stability during drilling operations and reliability during high-displacement transport. The modular skid is equipped with four specially designed hydraulic cylinders, which, in conjunction with the overall relocation control system, form an automatic lifting mechanism, enabling synchronized lifting and lowering of the equipment.

[0007] Rotary Lifting Columns: A six-column rotary lifting layout is adopted. The columns are made of H-beams fabricated into an A-type structure with three hinged rotary lifting nodes. This ensures both the structural strength and rigidity of the columns themselves and significantly improves the support stability of the drilling platform during operation. The six columns are symmetrically distributed, capable of stably bearing the operating load, self-weight, and dynamic load of the power platform and upper equipment. This allows the clearance height from the turntable beam to the ground to reach over 8 meters, fully meeting the installation space requirements of large wellhead safety devices.

[0008] Power platform: Utilizing an integrated layout design, the turntable motor and transmission device are housed within the structural space beneath the platform's support base. Power is transmitted to drive the turntable via a dedicated lift box, inertia brake, and universal joint, simplifying the power transmission path and improving transmission efficiency and structural compactness. The power platform's work surface size is expanded to over 7 meters × 15 meters, providing ample space for on-site personnel operations, tool placement, and the layout of various functional rooms.

[0009] Auxiliary functional components: The moving guide rail adopts a high-strength I-beam steel structure and is arranged longitudinally along the center line of the combined skid, which does not affect the overall transportation of the equipment and facilitates the installation, disassembly and relocation of the wellhead equipment; the working platform adopts a steel frame structure and is connected to the power platform body through pins and lugs. It can be rotated and unfolded to expand the working area, and the platform support rods provide stable support and positioning; the platform body diagonal support rod adopts an adjustable screw structure, and the length can be adjusted as needed. One end is hinged to the extension skid body, and the other end is connected to the power platform body. Four support points are set in a triangular layout to ensure the structural stability and strength of the power platform body during operation; the derrick foundation skid adopts an I-beam steel structure and modular design. Both ends are connected to the combined skid body through pins and lugs. It can not only bear the vertical load during the drilling process, but also enhance the connection rigidity between the combined skid bodies and improve the structural stability during platform traction and relocation.

[0010] 2. Traction and Steering System:

[0011] Both the detachable gooseneck towing system and the detachable towing tailstock utilize high-strength steel and composite beam structures, featuring high strength, minimal deformation, and easy assembly and disassembly. They can be flexibly assembled or disassembled according to actual operational and transport needs, enabling the tractor to tow the platform as a whole. The detachable towing tailstock integrates a specially designed heavy-duty axle, braking system, lighting system, and steering system (including steering cylinders and control lines). Its steering system synchronously controls the extension and retraction of piston rods in two sets of specially designed steering cylinders, driving the steering mechanism to rotate the specially designed heavy-duty axle left and right relative to the towing tailstock, achieving active steering. Simultaneously, the towing tailstock can also achieve passive steering with the combined skid, using a limiting mechanism to limit the steering angle and prevent oversteering. A linkage mechanism rigidly connects the two axles, ensuring stability during steering. The locking mechanism uses bolts or pins, allowing switching between disengaged and locked states according to steering mode requirements. This improves the stress distribution at the connection points, reduces the turning radius of the equipment, and broadens the adaptability to various transport conditions.

[0012] 3. Transfer Mode Design

[0013] High-level overall relocation: When the road conditions are good and the ground is relatively flat, the platform can remain operational without removing any equipment from the platform. Detachable towing gooseneck and detachable towing tailstock are installed at the front and rear ends of the combined skid. The overall relocation control system controls four specially designed hydraulic cylinders to move synchronously, lifting the entire set of equipment to the preset height. After connecting to the towing vehicle, the entire set of equipment can be towed and transported, greatly improving relocation efficiency.

[0014] Low-profile folding transport: When the relocation site has complex road conditions or uneven ground, a low-profile folding transport mode can be adopted to lower the equipment's center of gravity and ensure safe transport. Using a crane to suspend the power platform, first remove the positioning safety pins on the lifting column, then remove the four platform diagonal braces. The crane's rotational force rotates the power platform and lifting column to a low-profile folding state and secures them. Subsequently, detachable towing gooseneck and detachable towing tailstock are installed at the front and rear ends of the combined skid. The overall relocation control system controls a special hydraulic cylinder to lift the equipment to a preset height, connects it to a towing vehicle, and tows it for transport. This eliminates the need to dismantle equipment on the platform, balancing transport safety and efficiency.

[0015] Beneficial effects

[0016] This invention, through its six-column spiral lifting structure and multi-module combined skid design, achieves adaptability to large wellhead operations of no less than 3 meters × 3 meters, a clear installation space of more than 8 meters, and a working platform of more than 7 meters × 15 meters, fully meeting the requirements of oil well operations for the core parameters of the platform under the new situation.

[0017] The integrated design of the power platform simplifies the power transmission path and improves transmission efficiency and structural compactness; the optimized layout of auxiliary components such as the lifting guide rail and the work platform further enhances the convenience of on-site operations and space utilization.

[0018] The collaborative design of the detachable traction components and the bidirectional steering system enables the platform to be moved quickly as a whole. Two transportation modes can be flexibly selected according to road conditions. There is no need to dismantle the equipment on the platform during relocation, which greatly shortens the relocation time and reduces the labor intensity of on-site workers.

[0019] The entire set of equipment adopts high-strength materials and modular design, with strong structural stability and high safety performance. It also has operational adaptability and transportation flexibility, making it suitable for various onshore oil and gas drilling and workover operations and having broad engineering application prospects. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the operational status of a towable large drilling platform according to the present invention - front view.

[0021] Figure 2 This is a top view illustrating the operational status of a towable large drilling platform according to the present invention.

[0022] Figure 3 This is a schematic diagram of the operational status of a towable large drilling platform according to the present invention - left view.

[0023] Figure 4 This diagram illustrates the movement of a towable large drilling platform according to the present invention - a high-level overall movement front view.

[0024] Figure 5 This diagram illustrates the movement of a towable large drilling platform according to the present invention - a top-view view of the overall movement from a high position.

[0025] Figure 6 This diagram illustrates the movement of a towable large drilling platform according to the present invention - a low-profile folded front view of the movement.

[0026] Figure 7 This is a schematic diagram of the transportation of a towable large drilling platform according to the present invention - a low-profile folded top view of the transportation process.

[0027] Figure 8 This is a front view of a schematic diagram of the moving and steering system of a towable large drilling platform according to the present invention.

[0028] Figure 9 This is a top view illustrating the moving and steering system of a towable large drilling platform according to the present invention.

[0029] In the diagram: 1-platform diagonal brace, 2-spinning column, 3-combination skid, 4-special hydraulic cylinder, 5-moving guide rail, 6-power platform, 7-derrick foundation skid, 8-extension skid, 9-working platform 1, 10-working platform 2, 11-detachable towing gooseneck, 12-integrated relocation control system, 13-detachable towing tailstock, 14-tractor, 15-towing tail beam, 16-special steering cylinder, 17-steering mechanism, 18-limiting mechanism, 19-special heavy-duty axle, 20-linkage mechanism, 21-locking mechanism. Detailed Implementation

[0030] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] Assembly in operational condition: Based on the outer dimensions of the wellhead, select a suitable combination of skid modules and securely connect and tighten the four extended skids to the combined skid, ensuring no looseness. Connect the six slewing columns sequentially to the combined skid and the power platform body, using dedicated pin hinges for fixation. Connect working platforms 1 and 2 to the power platform body via pin lugs, using platform struts for support and fixation. Based on the wellhead location, use a crane to lift the power platform body and slewing columns to the operational position. Install the positioning safety pins of the slewing columns to ensure that the wellhead positions of the power platform body, the combined skid, and the ground wellhead are perpendicular and collinear. Finally, connect and pre-tighten the four platform diagonal struts sequentially to ensure the stability and strength of the overall structure.

[0032] High-level overall relocation operation: When high-level overall relocation is required, keep all equipment on the platform in operation and intact. Install a detachable towing gooseneck at the front of the combined skid and a detachable towing tail seat at the rear. Operate four specially designed hydraulic cylinders synchronously through the overall relocation control system to lift the entire set of equipment to the preset height. Connect the towing vehicle to the detachable towing gooseneck and start the towing vehicle to realize the overall towing and transfer.

[0033] Low-position folding and relocation operation: When low-position folding and relocation is required, keep the equipment on the platform intact. Use a crane to suspend the power platform, first remove the positioning safety pin on the lifting column, then remove the four platform diagonal braces. Use the crane's rotational force to rotate the power platform and lifting column to a low-position folding state and secure them. Install detachable towing gooseneck and detachable towing tailstock at the front and rear of the combined skid, respectively. Use the overall relocation control system to control the special hydraulic cylinder to lift the equipment to the preset height, connect it to the towing vehicle, and then tow it for transport.

[0034] Steering Operation: During transport, the steering mode of the traction tailstock can be switched according to road conditions: When active steering is required, the locking mechanism is switched to the disengaged state, and the control system drives a specially designed steering cylinder, which in turn rotates the steering mechanism and the specially designed heavy-duty axle to achieve active steering; when passive steering is required, the locking mechanism is switched to the locked state, and the traction tailstock turns synchronously with the combined skid, with the limiting mechanism limiting the steering angle throughout the process to ensure steering safety. This invention, through modular design, integrated layout, and a dual-mode transport solution, achieves multiple functions including large wellhead adaptation, high-clearance installation, and efficient overall transport, effectively solving the technical pain points of existing vehicle-mounted drilling platforms and possessing significant practical value and promotional significance.

Claims

1. A towable large drilling platform, characterized in that, The system includes a combined skid (3), a lifting column (2), a power platform (6), a moving guide rail (5), a work platform (9, 10), platform diagonal bracing rods (1), a derrick foundation skid (7), a detachable traction gooseneck (11), a detachable traction tailstock (13), and an overall relocation control system (12). The power platform (6) is hinged to the extended skid (8) of the combined skid (3) via four platform diagonal bracing rods (1). The lifting column (2) is connected at both ends to the combined skid (3) and the power platform. The platform (6) and the moving guide rail (5) are arranged along the center line of the combined skid seat (3). The working platform (9, 10) is hinged to the power platform (6). The two ends of the derrick foundation skid (7) are fixed to the combined skid seat (3) by pins. The detachable traction gooseneck (11) and the detachable traction tail seat (13) are respectively detachably assembled at the front and rear ends of the combined skid seat (3). The combined skid seat (3) is equipped with 4 specially made hydraulic cylinders (4), which work together with the overall relocation control system (12) to form an automatic lifting mechanism.

2. The towable large drilling platform according to claim 1, characterized in that, The rotating column (2) is made of H-beam steel into an A-type structure, with three hinged rotating nodes. The six rotating columns (2) are symmetrically distributed to bear the working load, self-weight and dynamic load of the power platform (6) and the upper equipment, so that the clear height from the turntable beam to the ground is not less than 8 meters.

3. The towable large drilling platform according to claim 1, characterized in that, The combined skid (3) is a multi-module splicing structure. The modules are fastened together by V-shaped blocks and special double pin shafts. The module material is spliced ​​H-shaped steel and composite beam. The extension skid (8) is the integrated part of the combined skid (3). It adopts H-shaped steel frame modular design to expand the hinge angle and grounding coverage of the platform diagonal brace (1).

4. The towable large drilling platform according to claim 1, characterized in that, The power platform (6) adopts an integrated layout. The turntable motor and transmission device are built into the base of the platform. The power is transmitted through a special lifting box, inertial brake device and universal joint to drive the turntable to operate. The working platform size is not less than 7 meters × 15 meters, and the wellhead adaptation size of the combined skid (3) is not less than 3 meters × 3 meters.

5. The towable large drilling platform according to claim 1, characterized in that, The detachable towing tailstock (13) consists of a towing tail beam (15), a special steering cylinder (16), a steering mechanism (17), a limiting mechanism (18), a special heavy-duty axle (19), a linkage mechanism (20), and a locking mechanism (21). The special steering cylinder (16) drives the steering mechanism (17) to deflect the special heavy-duty axle (19). The limiting mechanism (18) limits the steering angle range. The linkage mechanism (20) rigidly connects the two special heavy-duty axles (19) on both sides. The locking mechanism (21) realizes the separation or locking of the towing tail beam (15) and the special heavy-duty axle (19), so that the towing tailstock has two working modes: active steering and passive steering.

6. The towable large drilling platform according to claim 1, characterized in that, The lifting guide rail (5) adopts a high-strength I-beam structure and is arranged longitudinally along the combined skid seat (3); the working platform (9, 10) is a steel frame structure, which is connected to the power platform body (6) through pins and lugs, and is equipped with platform support rods for support and positioning.

7. The towable large drilling platform according to claim 1, characterized in that, The platform diagonal brace (1) adopts an adjustable screw structure, and its length can be adjusted as needed. One end is hinged to the extension skid seat (8), and the other end is hinged to the power platform (6). It is arranged in a triangular layout with four support points. The derrick foundation skid (7) adopts an I-shaped steel structure, which can not only bear the vertical load during the drilling process, but also enhance the connection rigidity between the combined skid seats (3).

8. The towable large drilling platform according to any one of claims 1-7, characterized in that, It has the function of high-level overall relocation: the equipment in the working state maintains the overall integrity. After assembling the detachable towing gooseneck (11) and the detachable towing tail seat (13), the equipment is lifted to the preset height by the special hydraulic cylinder (4) controlled by the overall relocation control system (12), and then transferred by the towing vehicle (14).

9. The towable large drilling platform according to any one of claims 1-7, characterized in that, It has a low-position folding and transfer function: remove the positioning safety pin of the lifting column (2) and the platform diagonal brace (1), rotate and fold the power platform (6) and the lifting column (2) to a low position and fix them. After assembling the detachable traction component, it is lifted by a special hydraulic cylinder (4) and pulled by a tractor (14) to complete the transfer.

Images