Overall hoisting method for the drill floor module
By setting up various lifting brackets and guide plates on the drilling platform module, and combining them with simulation loading technology, the problem of difficulty in controlling the precision during the docking and assembly of the drilling platform legs was solved, and efficient overall hoisting of the drilling platform module was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CSSC HUANGPU WENCHONG SHIPBUILDING CO LTD
- Filing Date
- 2023-05-12
- Publication Date
- 2026-05-26
AI Technical Summary
In the existing technology, it is difficult to control the precision of the docking and assembling process of the drilling platform legs, and the overall hoisting weight is too large, which increases the difficulty of the hoisting code design.
The drilling platform module is hoisted as a whole. By setting up a main hoist for turning over the first hook, a main hoist for turning over the second hook, a main hoist for turning over the first hook that also carries a hoisting weight, a main hoist for turning over the second hook that also carries a hoisting weight, a hoisting weight for the first hook, a hoisting weight for the second hook, and a hoisting weight for the third hook that also carries a hoisting weight and turns over the auxiliary hoist, combined with guide plates and simulated hoisting technology, the hoisting accuracy and balance are ensured.
The efficiency of mounting and positioning the drilling platform module was improved, the design problem of the lifting bracket for mounting a 908t drilling platform on a 900t gantry crane was solved, and the lifting accuracy and balance were ensured.
Smart Images
Figure CN116812106B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of hoisting technology, and in particular to a method for hoisting a drilling platform module as a whole. Background Technology
[0002] The total weight of the drilling platform module on the ship is 811t, and the total weight including the lifting rack is approximately 908t. Using a 900t gantry crane for this lifting is a special lifting condition, requiring that the weight lifted by the third hook be within the range of 400t to 500t. When the 900t gantry crane lifts sections exceeding 900t, the distance between the upper and lower trolleys must be maintained within the range of 12m to 20m. Since the section length is 26m, the tilting lifting clamp cannot be used as the lifting clamp alone. Furthermore, the windbreak wall installed on the drilling platform interferes with the lifting operation, increasing the design complexity of the lifting clamp.
[0003] In addition, since the drilling platform legs are hoisted in two parts, with the upper part connected to the bottom of the drilling platform and the lower part welded to the main deck, and the drilling platform legs are 6.4m high, it is difficult to monitor the mounting accuracy in real time during the docking and assembling process of the drilling platform legs. Summary of the Invention
[0004] The purpose of this invention is to provide a method for hoisting a drilling platform module as a whole, so as to solve the problems of difficulty in controlling the accuracy during the assembly and joining of the drilling platform legs and the excessive weight of the overall hoisting in the prior art.
[0005] The above-mentioned objectives of the present invention can be achieved by the following technical solutions:
[0006] This invention provides a method for hoisting a drilling rig module as a whole. The drilling rig module is equipped with a first hook tilting main hoist, a second hook tilting main hoist, a first hook tilting main hoist that also carries a lifting weight, a second hook tilting main hoist that also carries a lifting weight, a first hook carrying a lifting weight, a second hook carrying a lifting weight, and a third hook carrying a lifting weight and tilting auxiliary hoist.
[0007] Based on the center of gravity and structure of the drilling rig module, confirm the installation position of the third hook carrying the lifting weight and turning auxiliary lifting device;
[0008] The positions of the stress points of the first and second hooks are determined based on the bending moment of the drilling module.
[0009] The positions of the first hook carrying the lifting weight and the second hook carrying the lifting weight are determined based on the selected first hook turning main hoist and the lifting weight, the position of the first hook's stress point, the position of the second hook turning main hoist and the lifting weight, and the position of the second hook's stress point.
[0010] Markings were made based on the ship's bottom baseline and hull centerline;
[0011] Angle steel of a predetermined height is temporarily welded at the four corner strong structures on the front and back sides of the drilling platform module, and horizontal height marks are made on them to serve as the horizontal height reference for subsequent equipment installation.
[0012] Simulated loading was conducted to ensure that the accuracy met the preset requirements;
[0013] At least two guide plates are provided along the circumference at the closing opening of the lower half of each drill leg, and the drill rig section connected to the upper half of the drill leg is positioned and mounted with each of the lower half of the drill leg using the at least two guide plates.
[0014] The drilling rig module is positioned and installed based on the markings.
[0015] Preferably, the positions of the force-bearing points of the first hook and the second hook are determined according to the following formula:
[0016] G_12×L_12=G_3×L_3;
[0017] Wherein, G_12 is the force on the first hook and the second hook, L_12 is the distance between the first hook and the second hook and the center of gravity of the drilling rig module, G_3 is the force on the third hook, and L_3 is the distance between the third hook and the center of gravity of the drilling rig module.
[0018] Preferably, the step of simulating the load to ensure that the accuracy meets the preset requirements includes:
[0019] Using the outriggers of the drilling rig module as a reference for simulated mounting, multiple measurements were taken using a total station to compare and correct the closing deviation of each outrigger.
[0020] If the closing deviation does not meet the preset requirements, the corresponding outrigger is surgically corrected until the closing deviation meets the preset requirements.
[0021] Preferably, L_3 is 6 meters to 10 meters.
[0022] Preferably, the internal components of the segments within the preset lifting point range of the first hook, the second hook, and the third hook are reinforced by double-sided welding, and the reserved / delayed welding area must be fully welded.
[0023] Preferably, the preset range is an area no more than 1200 mm away from the suspension point.
[0024] Preferably, the weld leg of the double-sided reinforcing weld is not less than 10 mm.
[0025] Preferably, the markings include the moon pool centerline, the well center cross reference line, the drilling platform deck outline, and the derrick leg cross centerline.
[0026] Preferably, the deviations of the moon pool centerline, the well center cross reference line, and the ship hull centerline are all no greater than 3mm; and / or
[0027] The difference in width between the left and right halves of the longitudinal anti-top reinforcement of the moon pool centerline, the well cross reference line, and the moon pool trolley track is no greater than 3mm.
[0028] Preferably, the preset height of the angle steel is 300 mm to 500 mm.
[0029] This invention has at least the following features and advantages:
[0030] 1. This invention solves the problem of lifting bracket design for a 900t gantry crane carrying a 908t drilling platform.
[0031] 2. The present invention improves the loading and positioning efficiency of the drilling platform by simulating loading and installing guide plates. Attached Figure Description
[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0033] Figure 1 This is a top view of the hoisting method for the overall hoisting of the drilling platform module of the present invention;
[0034] Figure 2 This is a front view of the hoisting method for the overall hoisting of the drilling platform module of the present invention;
[0035] Figure 3 This is a schematic diagram of the structure of the upper half of the drill platform support leg of the present invention at the closing opening.
[0036] Figure 4 This is a top view of the structure at the junction of the lower half of the drilling platform legs arranged on the starboard side of the present invention.
[0037] Figure 5 This is a top view of the structure at the junction of the lower half of the drilling platform legs arranged on the port side of the present invention.
[0038] Figure 6 This is a schematic diagram of the structure of the guide plate of the present invention.
[0039] Figure labels and descriptions:
[0040] 1. First hook turning main hoist; 2. Second hook turning main hoist; 3. First hook turning main hoist also carrying lifting weights; 4. Second hook turning main hoist also carrying lifting weights; 5. First hook carrying lifting weights; 6. Second hook carrying lifting weights; 7. Third hook carrying lifting weights and turning auxiliary hoist; 8. Drill platform outriggers; 9. Guide plate. Detailed Implementation
[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0042] This invention provides a method for hoisting a drilling platform module as a whole. Please refer to [link / reference]. Figures 1 to 6 ,include:
[0043] S1. Based on the center of gravity and structure of the drilling rig module, confirm the installation position of the third hook carrying the lifting weight and turning auxiliary lifting 7.
[0044] S2. Determine the stress points of the first and second hooks based on the bending moment of the drilling module.
[0045] S3. Based on the selected first hook turning main hoist and carrying weight 3, the position of the first hook's stress point, the position of the second hook turning main hoist and carrying weight 4, and the position of the second hook's stress point, determine the position of the first hook carrying weight 5 and the position of the second hook carrying weight 6 respectively.
[0046] S4. Mark the bottom baseline and centerline of the hull according to the ship's baseline;
[0047] S5. Temporarily weld angle steel of a preset height at the four corners of the front and back of the drilling platform module, and make horizontal height markings on them as a horizontal height reference for subsequent equipment installation.
[0048] S6. Perform a simulated loading test to ensure that the accuracy meets the preset requirements;
[0049] S7. At least two guide plates 9 are provided along the circumference at the closing opening of the lower half of each drill leg 8, and the drill rig section connected to the upper half of the drill leg 8 is positioned and mounted with the lower half of each drill leg 8 using the at least two guide plates 9.
[0050] S8. The drilling platform module is positioned and installed based on the markings.
[0051] The drilling platform module is equipped with a first hook turning main hoist 1, a second hook turning main hoist 2, a first hook turning main hoist that also carries a lifting weight 3, a second hook turning main hoist that also carries a lifting weight 4, a first hook carrying a lifting weight 5, a second hook carrying a lifting weight 6, and a third hook carrying a lifting weight and turning auxiliary hoist 7.
[0052] This invention has at least the following features and advantages:
[0053] 1. This invention solves the problem of lifting bracket design for a 900t gantry crane carrying a 908t drilling platform.
[0054] 2. The present invention uses a simulated mounting and installation guide plate 9 to improve the mounting and positioning efficiency of the drilling platform.
[0055] In some embodiments, the location of the force-bearing point of the first hook and the location of the force-bearing point of the second hook are determined according to the following formula:
[0056] G_12×L_12=G_3×L_3;
[0057] Wherein, G_12 represents the force on the first and second hooks, L_12 represents the distance between the first and second hooks and the center of gravity of the drill platform module, G_3 represents the force on the third hook, and L_3 represents the distance between the third hook and the center of gravity of the drill platform module.
[0058] In some embodiments, S6, performing a simulated load to ensure that the accuracy meets preset requirements, includes:
[0059] S61. Using the outriggers of the drilling platform module as the reference for simulated mounting, multi-point measurements are taken using a total station to compare and correct the closing deviation of each outrigger.
[0060] S62. If the closing deviation does not meet the preset requirements, perform surgery on the corresponding outrigger to correct it until the closing deviation meets the preset requirements.
[0061] In some embodiments, L_3 is 6 to 10 meters, and in some specific embodiments, L_3 is 7.8 meters.
[0062] In some embodiments, the segmented internal components within the preset range of the lifting points of the first hook, second hook, and third hook are reinforced with double-sided welding, and the reserved / delayed welding area must be fully welded. Further, the preset range is an area no more than 1200 mm from the lifting point. Even further, the weld leg of the double-sided reinforcement weld is no less than 10 mm.
[0063] In some embodiments, the markings include the moon pool centerline, the well center cross reference line, the drilling platform deck outline, and the derrick leg cross centerline. Further, the deviations of the moon pool centerline, the well center cross reference line from the hull centerline are all no greater than 3mm; and / or the differences in width between the moon pool centerline, the well center cross reference line, and the left and right halves of the longitudinal anti-roof reinforcement of the moon pool trolley track are all no greater than 3mm.
[0064] In some embodiments, the preset height of the angle steel is 300 mm to 500 mm.
[0065] The invention will be further described below with reference to the accompanying drawings. Please refer to the attached drawings. Figures 1 to 6 :
[0066] This invention designs the lifting weights for the third hook based on the center of gravity and the drilling rig structure, and then calculates the stress points of the first and second hooks based on the bending moment. By rationally designing the lifting weights, the stress points of the first and second hooks are shifted towards the center of gravity, ensuring that the gantry crane hooks are subjected to forces suitable for their specific working conditions, and maintaining lifting balance as much as possible during the drilling rig hoisting process. Before hoisting, the center line of the moon pool, the cross reference line of the well center, the overall outline of the section (drilling rig deck), and the cross center line of the derrick legs are marked based on the ship's bottom baseline and hull centerline. During assembly, the center points of the well center and derrick legs are used as references to ensure hoisting accuracy. Furthermore, simulated assembly is conducted, and the deviation value determines whether surgical correction is necessary to ensure successful hoisting in one go. Finally, the drilling rig section is positioned and assembled by installing guide plates 9 at the closing opening on the outer side of the drilling rig legs 8.
[0067] The specific steps are as follows:
[0068] 1. Based on the center of gravity and the drilling rig structure, design the lifting weight for hook number three, and then calculate the stress points of hook number one and hook number two based on the bending moment. By designing hook number one to carry lifting weight 5 and hook number two to carry lifting weight 6, the stress points of hook number one and hook number two are shifted towards the center of gravity.
[0069] Since the drilling rig lifting weight exceeds 900t, the lower trolley (i.e., hook number 3) must lift no less than 400t, and the hook distance between the upper and lower trolleys must be between 12 and 20m. To meet these lifting conditions, the distance between the upper trolley (i.e., hooks number 1 and 2) and the lower trolley (i.e., hook number 3) should be shortened to reduce the overall deflection of the drilling rig. Based on the center of gravity, the lifting weight of hook number 3 should be positioned on a strong structure approximately 7.8m from the center of gravity. Considering the use of some lifting weights from hook number 1 and hook number 2 for both the main lifting rigs, hook number 1 and hook number 2 are designed to carry lifting weights 5 and 6 respectively, shifting the stress points of hooks number 1 and number 2 towards the center of gravity. The offset distance of the stress points of hooks number 1 and number 2 is derived from the moment balance of hooks number 1, 2, and 3, i.e., G_12×L_12=G_3×L_3. Where G_12 represents the force on the first and second hooks, L_12 represents the distance of the first and second hooks from the center of gravity, G_3 represents the force on the third hook, and L_3 represents the distance of the third hook from the center of gravity.
[0070] 2. The internal components of the segment within a 1200mm radius around the lifting bracket shall be reinforced by double-sided welding. The reserved / delayed welding area shall be fully welded, and the weld leg shall be no less than 10mm.
[0071] 3. Based on the ship's bottom baseline and hull centerline, mark the centerline of the moon pool, the cross reference line of the well center, the overall outline of the section (drilling platform deck), and the cross center line of the derrick legs. During assembly, use the center point of the well center and the center point of the derrick legs as the reference. The deviation of the moon pool well center cross reference line from the hull centerline should be ≤3mm, and the difference in width between the left and right halves of the longitudinal anti-top reinforcement of the moon pool trolley track should be ≤3mm.
[0072] 4. Temporarily weld 300mm to 500mm high angle steel at the four corners of the drilling rig's front and back sides, and mark the horizontal height with a punch mark to serve as the horizontal height reference for subsequent equipment installation.
[0073] 5. Simulated mounting: Using the four outriggers of the drilling rig as the reference for simulated mounting, multi-point measurements are taken using a total station to compare and correct the closing deviation of the four outriggers. The deviation value determines whether surgical correction is necessary, ensuring that the deviation is within the allowable range and does not affect the alignment accuracy of the drilling platform and the main hull's moon pool center.
[0074] 6. The drilling platform section is positioned and mounted by installing guide plates 9 at the closing opening on the outer side of the drilling platform legs 8.
[0075] In some embodiments, see Figure 6 The guide plate 9 has an inclined guide opening, which is positioned near the drilling rig to guide the upper part of the outrigger from the guide opening to the lower part of the outrigger. In some more specific embodiments, two guide plates 9 are installed at the closing opening on the outer side of the drilling rig outrigger 8, and each guide plate 9 is positioned facing outward of the drilling rig. That is, the two guide plates 9 on the outer side of the drilling rig outrigger 8 located near the stern on the starboard side are respectively positioned near the starboard side and the stern. Please refer to [link to details]. Figure 4 The two guide plates 9 on the outer surface of the drill rig leg 8, located on the port side near the stern, are respectively positioned near the port side and the stern. Please refer to [link to details]. Figure 5 .
[0076] 7. During hoisting, it is necessary to have professional personnel in charge to direct the operation and to position and install the drilling platform according to the crosshair reference line of the well center.
[0077] This invention employs a parallel lifting weight design to shift the force point of the hook towards the center of gravity, ensuring that the lifting weight of the third hook is within the range of 400t to 500t under special working conditions. It also uses a method of simulating loading and installing guide plate 9 to solve the problem of drilling platform loading accuracy.
[0078] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. A method of integrally hoisting a drilling rig module, characterized by, The drilling platform module is equipped with a first hook tilting main hoist, a second hook tilting main hoist, a first hook tilting main hoist that also carries a lifting weight, a second hook tilting main hoist that also carries a lifting weight, a first hook carrying a lifting weight, a second hook carrying a lifting weight, and a third hook carrying a lifting weight and tilting auxiliary hoist, including: Based on the center of gravity and structure of the drilling rig module, confirm the installation position of the third hook carrying the lifting weight and turning auxiliary lifting device; The positions of the stress points of the first and second hooks are determined based on the bending moment of the drilling module. The positions of the first hook carrying the lifting weight and the second hook carrying the lifting weight are determined based on the selected first hook turning main hoist and the lifting weight, the position of the first hook's stress point, the position of the second hook turning main hoist and the lifting weight, and the position of the second hook's stress point. Markings were made based on the ship's bottom baseline and hull centerline; Angle steel of a predetermined height is temporarily welded at the four corner strong structures on the front and back sides of the drilling platform module, and horizontal height markings are made on them to serve as the horizontal height reference for subsequent equipment installation. Simulated loading was conducted to ensure that the accuracy met the preset requirements; At least two guide plates are provided along the circumference at the closing opening of the lower half of each drill leg, and the drill rig section connected to the upper half of the drill leg is positioned and mounted with each of the lower half of the drill leg using the at least two guide plates. The drilling rig module is positioned and installed based on the markings. The simulated loading process to ensure that the accuracy meets the preset requirements includes: Using the outriggers of the drilling rig module as a reference for simulated mounting, multiple measurements were taken using a total station to compare and correct the closing deviation of each outrigger. If the closing deviation does not meet the preset requirements, the corresponding outrigger is surgically corrected until the closing deviation meets the preset requirements. The positions of the force application points of the first hook and the second hook are determined according to the following formula: G_12×L_12=G_3×L_3; Wherein, G_12 is the force on the first hook or the second hook, L_12 is the distance between the first hook or the second hook and the center of gravity of the drill platform module, G_3 is the force on the third hook, and L_3 is the distance between the third hook and the center of gravity of the drill platform module.
2. The method of claim 1, wherein, The L_3 is 6 to 10 meters.
3. The method of claim 1, wherein, The internal components of the segments within the preset lifting point range of the first hook, the second hook, and the third hook shall be reinforced by double-sided welding, and the reserved / delayed welding area shall be fully welded.
4. The method for overall hoisting of the drilling rig module according to claim 3, characterized in that, The preset range is an area no more than 1200 mm away from the suspension point.
5. The method for overall hoisting of the drilling rig module according to claim 4, characterized in that, The weld leg of the double-sided reinforced weld shall be no less than 10 mm.
6. The method for overall hoisting of the drilling rig module according to claim 5, characterized in that, The markings include the center line of the moon pool, the cross reference line of the well center, the outline of the drilling platform deck, and the center line of the cross of the derrick legs.
7. The method for overall hoisting of the drilling rig module according to claim 6, characterized in that, The deviations of the moon pool centerline, the well center cross reference line, and the ship hull centerline are all no greater than 3mm; and / or The difference in width between the left and right halves of the longitudinal anti-top reinforcement of the moon pool centerline, the well cross reference line, and the moon pool trolley track is no greater than 3mm.
8. The method for overall hoisting of the drilling rig module according to claim 7, characterized in that, The preset height of the angle steel is 300 mm to 500 mm.