Hook test method for drilling system of drilling ship
By installing a lifting weight and a limit device on the deck of the semi-submersible vessel and using a steel wire rope to connect the big hook of the drilling and production vessel, the problem of the drilling system big hook test requiring re-entry into the dock was solved, the safety and efficiency of the underwater test were achieved, and the construction cost was reduced.
Patent Information
- Application Number
- CN202510800046.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-16
- Publication Date
- 2025-09-19
AI Technical Summary
During the construction of drilling and production vessels, the hook load test of the drilling system needs to be carried out at the dock stage. However, since the counterweight cannot be placed, the vessel needs to re-enter the dock and sit on the pier, which increases construction costs and reduces production efficiency.
A lifting weight is fixedly installed in the middle of the deck of the semi-submersible vessel, and the semi-submersible vessel is towed to the designated position and dived by a tugboat. The big hook of the drilling and production vessel is connected by a steel wire rope, and the big hook test is carried out using the semi-submersible vessel to provide a pulling point. The drilling and production vessel is fixed with a limit device and a cable to ensure the safety and stability of the test.
The large hook test was carried out in water, which prevented the drilling and production vessel from re-entering the dock and resting on the pier, reduced construction costs and improved production efficiency.
Smart Images
Figure CN120667030A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of ship detection and testing, and in particular relates to a large hook test method for a drilling system of a drilling and production ship. Background Art
[0002] The drilling system of a drilling vessel is installed and commissioned during the dock phase. The drilling system's hook load test is a crucial step in the vessel's construction process. The drilling system's hook is primarily used to lift drilling equipment such as the BOP (Bore-Operating Platform), and a load test is required before it can be put into production. According to the hook load test requirements, the rigging system must be connected to a ballast weight through the center of the drill floor during the test. Because the drilling vessel is docked at the dock, the ballast weight cannot be placed on the ground as is the case with drilling vessels during the slipway phase. Furthermore, because the moonpool area is a large opening that runs vertically through the main hull, the ballast weight cannot be placed on the main deck. Therefore, the current shipbuilding process requires the drilling vessel to re-dock after the dock phase to undergo the drilling system hook test. This re-docking increases construction costs and reduces production efficiency. Therefore, improvements are necessary to address the shortcomings of existing technologies. Summary of the Invention
[0003] The present invention aims to provide a hook test method for a drilling system of a drilling and production vessel, which can perform a hook test on water without the drilling and production vessel having to re-enter a dock, thereby reducing construction costs and improving production efficiency.
[0004] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:
[0005] A method for testing a large hook of a drilling system of a drilling and production vessel comprises the following steps:
[0006] Step 1: Install the hanging weight in the middle of the deck of the semi-submersible vessel;
[0007] Step 2: Connect the lifting sling to the big hook of the drilling system of the drilling vessel according to the test requirements;
[0008] Step 3: Use a tugboat to tow the semi-submersible vessel to the harbor sinkhole, drop anchor, and then dive it to the required test height. The water depth H of the sinkhole should satisfy H ≥ h1 + h2 + h3 + h4, where h1 is the height of the semi-submersible vessel's main deck, h2 is the draft of the drilling vessel, h3 is the height from the bottom of the semi-submersible vessel to the bottom of the sinkhole, and h4 is the height from the bottom of the drilling vessel to the deck of the semi-submersible vessel.
[0009] Step 4: Use a tugboat to tow the drilling vessel above the semi-submersible vessel, align the moonpool of the drilling vessel with the hanging hook on the middle deck of the semi-submersible vessel, and secure the drilling vessel to the semi-submersible vessel with cables;
[0010] Step 5: Install limit devices at the four pontoon positions on both sides of the semi-submersible vessel deck, with one end of the limit device fixedly connected to the longitudinal wall strength structure of the pontoon, and the other end of the limit device resting against the side outer plate strength structure of the drilling and production vessel;
[0011] Step 6: Use a steel wire rope to pass through the moon pool and connect the lifting weight on the deck of the semi-submersible vessel and the lifting sling connected to the big hook of the drilling system. Set a tension meter at the connection between the steel wire rope and the lifting weight. Perform the test according to the big hook test requirements. The big hook provides an upward pulling force, and the big hook tension value is calculated based on the reading displayed on the tension meter.
[0012] As a preferred embodiment of the above-mentioned method for testing the hook of the drilling system of the drilling and production vessel, in step six, the wire rope is provided with a first shackle and a second shackle. The wire rope is connected to the lifting hook on the deck of the semi-submersible vessel through the first shackle, and the wire rope is connected to the lifting rigging on the hook of the drilling system through the second shackle.
[0013] As a preferred solution to the above-mentioned hook test method for the drilling system of the drilling and production vessel, in step one, multiple lifting weights are fixedly installed in the middle of the deck of the semi-submersible vessel, and in step six, a third shackle is also provided on the wire rope. The multiple wire ropes are respectively connected to the lifting weights and the sling, and the multiple wire ropes are connected to the third shackle.
[0014] As a preferred solution of the above-mentioned hook test method for the drilling system of the drilling and production vessel, the limiting device is connected to the upper end of the buoyancy box.
[0015] As a preferred solution of the above-mentioned hook test method for the drilling system of the drilling and production vessel, a mooring pile is provided at the upper end of the buoyancy box, and the drilling and production vessel is connected to the mooring pile by a cable to fix the position.
[0016] As a preferred solution of the above-mentioned hook test method for the drilling system of the drilling and production ship, the limiting device includes a pushing tool body and a pushing device, the pushing device is horizontally arranged on the pushing tool body, the pushing device is connected to a pushing rod, and the pushing device can drive the pushing rod to be telescopically adjusted outward.
[0017] As a preferred solution of the above-mentioned hook test method for the drilling system of the drilling and production vessel, a rubber block is provided at the end of the push rod.
[0018] As a preferred solution of the above-mentioned hook test method for the drilling system of the drilling and production vessel, the pushing device is a hydraulic jack.
[0019] The implementation of the hook test method for a drilling system of a drilling vessel provided by the present invention has the following beneficial effects compared with the prior art:
[0020] The present invention drags the drilling vessel to the top of the semi-submersible vessel, and uses the semi-submersible vessel to dive to conduct a big hook test of the drilling system. By fixing a lifting weight in the middle of the deck of the semi-submersible vessel, a pulling point is provided for the big hook of the drilling vessel, which solves the problem that the ballast in water cannot be placed on the ground like the drilling vessel in the slipway stage, resulting in the inability to conduct the big hook test. The semi-submersible vessel dives to a sufficient height, which is greater than the sum of the height of the main deck of the semi-submersible vessel, the draft of the drilling vessel, the height from the bottom of the semi-submersible vessel to the bottom of the sinking pit, and the height from the bottom of the drilling vessel to the deck of the semi-submersible vessel, to ensure that during the big hook test, the big hook will not cause the bottom of the drilling vessel to hit the deck of the semi-submersible vessel when pulling the lifting weight upward, causing collision damage. The moon pool of the drilling vessel is aligned with the lifting weight in the middle of the deck of the semi-submersible vessel. During the hook test, the steel wire rope can pass through the moon pool and connect with the lifting weight. The drilling and production vessel is fixed to the semi-submersible vessel by a cable, ensuring that the drilling and production vessel will not be swept away by the water flow during the large hook test and ensuring the safety of the test. One end of the limit device is fixedly connected to the strong structure of the longitudinal wall of the pontoon, and the other end of the limit device is against the strong structure of the side outer plate of the drilling and production vessel, ensuring that the displacement of the drilling and production vessel relative to the semi-submersible vessel always remains within the allowable range during the test. In this method, the lifting weight for the large hook test is fixed on the semi-submersible vessel, and the semi-submersible vessel is submerged to provide a pulling point for the large hook test. The semi-submersible vessel is submerged to a height sufficient for the test, so that the drilling and production vessel can conduct the large hook test in water. The drilling and production vessel does not need to re-enter the dock for docking, thereby reducing construction costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.
[0022] Figure 1 Schematic diagram of the drilling and production vessel of the present invention viewed from above the semi-submersible vessel;
[0023] Figure 2 Schematic diagram of the semi-submersible vessel of the present invention diving into a sinkhole;
[0024] Figure 3 This is a schematic diagram of the large hook of the present invention being connected to the hanging weight via a steel wire rope;
[0025] Figure 4 yes Figure 3 A partial enlarged schematic diagram of the first shackle;
[0026] Figure 5 is a schematic diagram of the limiting device of the present invention;
[0027] Figure 6 It is a schematic diagram of the hanging code of the present invention;
[0028] Figure 7 The figure is a top view schematic diagram of the hanging hook of the present invention installed on the deck of a semi-submersible vessel.
[0029] Markings in the figure:
[0030] 100. Semi-submersible vessel; 110. Buoyancy tank; 120. Cable; 200. Drilling and production vessel; 210. Moon pool; 300. Lifting sling; 310. Wire rope; 400. Limiting device; 410. Pushing tool body; 420. Pushing device; 430. Pushing rod; 431. Rubber block; 500. First shackle; 510. Second shackle; 520. Third shackle; 530. Tension gauge; 600. Sinking pit; 700. Lifting weight. DETAILED DESCRIPTION
[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.
[0032] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.
[0033] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.
[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0035] Please also refer to Figures 1 to 7 Now, the hook test method of the drilling system of the drilling and production ship provided by the embodiment of the present invention is described.
[0036] like Figures 1 to 7 As shown, the hook test method of the drilling system of the drilling and production vessel 200 of the present invention includes the following steps:
[0037] Step 1: Fix the hanging weight 700 in the middle of the deck of the semi-submersible vessel 100;
[0038] Step 2: Connect the sling 300 to the big hook of the drilling system of the drilling vessel 200 according to the test requirements;
[0039] Step 3: Use a tugboat to tow the semi-submersible vessel 100 to the harbor sump 600, drop anchor, and then dive to the required test height. The water depth H of the sump 600 should satisfy H ≥ h1 + h2 + h3 + h4, where h1 is the height of the main deck of the semi-submersible vessel 100, h2 is the draft of the drilling and production vessel 200, h3 is the height from the bottom of the semi-submersible vessel 100 to the bottom of the sump 600, and h4 is the height from the bottom of the drilling and production vessel 200 to the deck of the semi-submersible vessel 100.
[0040] Step 4: Use a tugboat to tow the drilling vessel 200 above the semi-submersible vessel 100, align the moon pool 210 of the drilling vessel 200 with the hanging hook 700 on the middle of the deck of the semi-submersible vessel 100, and secure the drilling vessel 200 to the semi-submersible vessel 100 with the cable 120;
[0041] Step 5: Install limit devices 400 at the four pontoons 110 on both sides of the deck of the semi-submersible vessel 100. One end of the limit device 400 is fixedly connected to the longitudinal wall strength structure of the pontoon 110, and the other end of the limit device 400 is against the side outer plate strength structure of the drilling and production vessel 200.
[0042] Step 6: Use the steel wire rope 310 to pass through the moon pool 210 to connect the hanging weight 700 on the deck of the semi-submersible vessel 100 and the lifting sling 300 connected to the big hook of the drilling system respectively. Set a tension meter 530 at the connection between the steel wire rope 310 and the hanging weight 700, and conduct a test according to the big hook test requirements. The big hook provides an upward pulling force, and the big hook tension value is calculated based on the reading displayed on the tension meter 530.
[0043] The moon pool 210 is an open structure that passes through the main hull in the vertical direction. The moon pool 210 is an existing structure of the drilling and production vessel 200 and will not be described in detail here.
[0044] For example, in step six, the wire rope 310 is provided with a first shackle 500 and a second shackle 510. The wire rope 310 is connected to the lifting hook 700 on the deck of the semi-submersible vessel 100 via the first shackle 500, and the wire rope 310 is connected to the sling 300 on the main hook of the drilling system via the second shackle 510. The shackles can evenly distribute the force during lifting, preventing local stress concentration during the main hook test that may cause the wire rope 310 to break. The shackles can also be used to fine-tune the length of the wire rope 310, balancing the center of gravity deviation of the hoisted object and solving the problem of unstable lifting caused by the center of gravity shift.
[0045] For example, in step 1, multiple lifting weights 700 are fixedly installed in the middle of the deck of the semi-submersible vessel 100. In step 6, a third shackle 520 is further provided on the wire rope 310. The multiple wire ropes 310 are respectively connected to the lifting weights 700 and the sling 300, and the multiple wire ropes 310 are connected to the third shackle 520. The multiple wire ropes 310 connected to the lifting weights 700 converge at the third shackle 520 and are connected to the wire rope 310 connected to the sling 300 through the third shackle 520, making it easy to adjust the length of the wire rope 310.
[0046] Illustratively, the limiting device 400 is connected to the upper end of the pontoon 110. When the semi-submersible vessel 100 dives, the upper end of the pontoon 110 is above the water surface. Connecting the limiting device 400 to the upper end of the pontoon 110 facilitates the contact with the side plate of the drilling and production vessel 200, thereby ensuring that the displacement of the drilling and production vessel 200 relative to the semi-submersible vessel 100 is always kept within the allowable range during the test.
[0047] Illustratively, a cable pile is provided at the upper end of the pontoon 110, and the drilling and production ship 200 is connected to the cable pile at a fixed position via a cable 120. The drilling and production ship 200 is connected to the cable pile via the cable 120, and the semi-submersible vessel 100 is anchored and fixed in the harbor sinkhole 600, so that the drilling and production ship 200 is connected to the semi-submersible vessel 100 via the cable 120 to avoid being washed away by the water flow.
[0048] Exemplarily, the limiting device 400 includes a pushing fixture body 410 and a pushing device 420. The pushing device 420 is horizontally mounted on the pushing fixture body 410 and is connected to a pushing rod 430. The pushing device 420 is capable of driving the pushing rod 430 to extend and retract outward. The pushing device 420 drives the pushing rod 430 to extend outward, adjusting the position of the pushing rod 430 so that the end of the pushing rod 430 abuts against the side plating of the drilling and production vessel 200. This retractable adjustment allows the pushing rod 430 to accommodate drilling and production vessels 200 of varying sizes.
[0049] For example, a rubber block 431 is provided at the end of the push rod 430 , and the rubber block 431 with a buffering effect presses against the side outer plate of the drilling and production ship 200 to avoid damaging the side outer plate of the drilling and production ship 200 .
[0050] Illustratively, the pushing device 420 is a hydraulic jack. The drilling and production vessel 200 is heavy. By using the hydraulic jack as the pushing device 420 , the drilling and production vessel 200 can be stabilized during the hook test.
[0051] The implementation of the hook test method for a drilling system of a drilling and production vessel 200 provided by the present invention has the following beneficial effects compared with the prior art:
[0052] The present invention drags the drilling vessel 200 to the top of the semi-submersible vessel 100, and uses the semi-submersible vessel 100 to dive for a big hook test of the drilling system. By fixing a lifting weight 700 on the middle of the deck of the semi-submersible vessel 100, a pulling point is provided for the big hook of the drilling vessel 200, which solves the problem that the ballast in water cannot be placed on the ground as in the slipway stage, resulting in the inability to perform the big hook test. The semi-submersible vessel 100 dives to a sufficient height, which is greater than the sum of the height of the main deck of the semi-submersible vessel 100, the draft of the drilling vessel 200, the height from the bottom of the semi-submersible vessel 100 to the bottom of the sinkhole 600, and the height from the bottom of the drilling vessel 200 to the deck of the semi-submersible vessel 100. This ensures that during the big hook test, the big hook pulling the lifting weight 700 upward will not cause the bottom of the drilling vessel 200 to hit the deck of the semi-submersible vessel 100 and cause collision damage. The moon pool 210 of the drilling vessel 200 is aligned with the lifting weight 70 in the middle of the deck of the semi-submersible vessel 100. During the hook test, the steel wire rope 310 can pass through the moon pool 210 and connect with the lifting weight 700. The drilling and production vessel 200 is fixed to the semi-submersible vessel 100 via the cable 120, ensuring that the drilling and production vessel 200 will not be swept away by the current during the hook test, ensuring test safety. One end of the limiter 400 is fixedly connected to the longitudinal wall strength structure of the pontoon 110, and the other end of the limiter 400 abuts the side outer plating strength structure of the drilling and production vessel 200, ensuring that the displacement of the drilling and production vessel 200 relative to the semi-submersible vessel 100 remains within the allowable range during the test. This method secures the lifting weight 700 for the hook test to the semi-submersible vessel 100, submerges the semi-submersible vessel 100 to provide a pulling point for the hook test, and submerges the semi-submersible vessel 100 to a sufficient height for the test, allowing the drilling and production vessel 200 to conduct the hook test in water. The drilling and production vessel 200 does not need to re-dock for anchoring, thereby reducing construction costs and improving production efficiency.
[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.
Claims
1. A method for testing a large hook of a drilling system of a drilling and production vessel, characterized in that: The following steps are involved: Step 1: Install the hanging weight in the middle of the deck of the semi-submersible vessel; Step 2: Connect the lifting sling to the big hook of the drilling system of the drilling vessel according to the test requirements; Step 3: Use a tugboat to tow the semi-submersible vessel to the harbor sinkhole, drop anchor, and then dive it to the required test height. The water depth H of the sinkhole should satisfy H ≥ h1 + h2 + h3 + h4, where h1 is the height of the semi-submersible vessel's main deck, h2 is the draft of the drilling vessel, h3 is the height from the bottom of the semi-submersible vessel to the bottom of the sinkhole, and h4 is the height from the bottom of the drilling vessel to the deck of the semi-submersible vessel. Step 4: Use a tugboat to tow the drilling vessel above the semi-submersible vessel, align the moonpool of the drilling vessel with the hanging hook on the middle deck of the semi-submersible vessel, and secure the drilling vessel to the semi-submersible vessel with cables; Step 5: Install limit devices at the four pontoon positions on both sides of the semi-submersible vessel deck, with one end of the limit device fixedly connected to the longitudinal wall strength structure of the pontoon, and the other end of the limit device resting against the side outer plate strength structure of the drilling and production vessel; Step 6: Use a steel wire rope to pass through the moon pool and connect the lifting weight on the deck of the semi-submersible vessel and the lifting sling connected to the big hook of the drilling system. Set a tension meter at the connection between the steel wire rope and the lifting weight. Perform the test according to the big hook test requirements. The big hook provides an upward pulling force, and the big hook tension value is calculated based on the reading displayed on the tension meter.
2. The hook test method for a drilling system of a drilling and production vessel according to claim 1, characterized in that: In step six, the wire rope is provided with a first shackle and a second shackle. The wire rope is connected to the lifting hook on the deck of the semi-submersible vessel through the first shackle, and the wire rope is connected to the lifting rigging on the big hook of the drilling system through the second shackle.
3. The hook test method for a drilling system of a drilling and production vessel according to claim 2, characterized in that: In step one, a plurality of lifting weights are fixedly installed in the middle of the deck of the semi-submersible vessel. In step six, a third shackle is further provided on the wire rope. The plurality of wire ropes are respectively connected to the lifting weights and the slings, and the plurality of wire ropes are connected to the third shackle.
4. The hook test method for a drilling system of a drilling and production vessel according to claim 3, characterized in that: The limiting device is connected to the upper end of the buoyancy box.
5. The hook test method for a drilling system of a drilling and production vessel according to claim 4, characterized in that: A cable pile is provided at the upper end of the pontoon, and the drilling and production vessel is connected to the cable pile by a cable to fix the position.
6. The hook test method for a drilling system of a drilling and production vessel according to claim 4, characterized in that: The limiting device includes a pushing tool body and a pushing device, the pushing device is horizontally arranged on the pushing tool body, the pushing device is connected to a pushing rod, and the pushing device can drive the pushing rod to be telescopically adjusted outward.
7. The hook test method for a drilling system of a drilling and production vessel according to claim 6, characterized in that: The end of the push rod is provided with a rubber block.
8. The hook test method for a drilling system of a drilling and production vessel according to claim 6, characterized in that: The pushing device is a hydraulic jack.