Pile shoe structure test device and method for a jack-up drilling platform

Abstract

The application relates to the technical field of offshore engineering construction, and discloses a pile shoe structure test device and method of a self-elevating drilling platform, wherein the device comprises a blocking plate used for blocking a ladder opening of a ladder of a pile shoe to form an air bag cabin in the pile shoe; a water pipe, a bottom end of the water pipe penetrating through the blocking plate and extending into the air bag cabin; a water supply device connected with a top end of the water pipe and used for supplying water into the air bag cabin; an air pipe, a bottom end of the air pipe penetrating through the blocking plate and extending into the air bag cabin; and a pressure boosting device connected with a top end of the air pipe and used for increasing the air pressure of the air bag cabin so that the pressure in the air bag cabin reaches a set pressure value. The application can meet the pressure requirement of the water pressure head height value required by the cabin during the pile shoe structure test without manufacturing a height difference, avoids the complicated operation of pulling tens of meters or hundreds of meters of water pipes, has a simple structure, is convenient and fast to operate, and improves the work efficiency.

Description

Technical Field

[0001] This invention relates to the field of marine engineering construction technology, and in particular to a test device and method for the pile shoe structure of a jack-up drilling platform. Background Technology

[0002] Jack-up drilling platforms play a vital role in the development of near-shore offshore oil resources. Among offshore platforms, only jack-up drilling platforms use pile shoes to support the platform against the seabed. These pile shoes form the foundation of the entire platform, acting as a separate compartment on the seabed. Their structural strength is crucial to the safety of the entire drilling platform and is a necessary factor in pile shoe design. Therefore, to verify whether the pile shoe manufacturing process meets the usage requirements, after completion, airtightness checks and structural strength tests are conducted on the pile shoes according to relevant specifications and rules. The airtightness test verifies the airtightness of the individual structural compartment of the pile shoe, ensuring its watertightness. The structural test verifies whether the structural strength of the compartment meets the corresponding requirements of the designed water head height, that the compartment walls do not deform, and that it can withstand the forces exerted by the water pressure in the working sea area. Based on the designed operating sea area and conventional specifications, the deepest designed operating area can withstand the water head exerted on the pile shoes.

[0003] Currently, the structural strength test method for pile shoes involves filling the entire compartment with water to the specified height, until the water overflows from the highest point, thus meeting the hydraulic head height requirements of the compartment design. However, due to the unique nature of offshore platforms, the designed operating water depth is typically tens of meters. At present, the factory testing phase during pile shoe manufacturing cannot meet the required height difference to be measured during structural testing. Summary of the Invention

[0004] This invention provides a test device and method for the pile shoe structure of a jack-up drilling platform, which solves the problem that the method of testing the strength of the pile shoe structure by filling the entire compartment with water cannot meet the height difference requirements of the pile shoe structure test during the factory testing stage of pile shoe manufacturing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] One aspect of the present invention is to provide a test apparatus for the pile shoe structure of a jack-up drilling platform, comprising:

[0007] A sealing plate, which is used to seal the entrance of the ladder passage of the pile shoe to form an airbag chamber inside the pile shoe;

[0008] A water pipe, the bottom end of which passes through the sealing plate and extends into the airbag chamber;

[0009] a water supply device connected with the top end of the water pipe for supplying water into the airbag chamber;

[0010] an air pipe, the bottom end of which extends into the airbag chamber through the blocking plate;

[0011] a pressure boosting device connected with the top end of the air pipe, the pressure boosting device being used to increase the air pressure of the airbag chamber so that the pressure in the airbag chamber reaches a set pressure value.

[0012] Preferably, the height of the top end of the air pipe is greater than the height of the top of the spudcan.

[0013] Preferably, a safety valve is arranged between the top end of the water pipe and the blocking plate and between the top end of the air pipe and the blocking plate.

[0014] Preferably, an air pressure gauge is installed on the air pipe.

[0015] Preferably, the pressure boosting device is a pressure boosting pump.

[0016] Another aspect of the present application is to provide a method for testing the structure of a spudcan of a self-elevating drilling platform, comprising the following steps:

[0017] Step S1, blocking the blocking plate at the ladder opening of the ladder of the spudcan so that an airbag chamber is formed inside the spudcan;

[0018] Step S2, installing a water pipe and an air pipe on the blocking plate, and the bottom end of the water pipe and the bottom end of the air pipe extend into the airbag chamber, respectively;

[0019] Step S3, injecting water into the water pipe through the water supply device until the airbag chamber is filled with water, and the height of the water in the air pipe reaches the height of the top of the spudcan;

[0020] Step S4, increasing the air pressure in the airbag chamber through the pressure boosting device until the pressure in the airbag chamber reaches a set pressure value;

[0021] Step S5, performing a strength test on the airbag chamber of the spudcan.

[0022] Preferably, the step S4 comprises:

[0023] Step S41, calculating the hydrostatic pressure required by the airbag chamber;

[0024] Step S42, starting the pressure boosting device, opening the safety valve, and measuring the air pressure in the air pipe through the air pressure gauge;

[0025] Step S43, when the pressure value measured by the air pressure gauge reaches the hydrostatic pressure value, closing the pressure boosting device and the safety valve.

[0026] Preferably, after the step S43, further comprising:

[0027] It is observed whether the pressure value measured by the barometer changes within a set time, if the pressure value measured by the barometer does not change within the set time, step S5 is performed, if the pressure value measured by the barometer changes within the set time, steps S42 and S43 are repeatedly performed.

[0028] Preferably, in the step S1, the material of the plugging plate is the same as that of the top plate of the spudcan.

[0029] Compared with the prior art, the self-elevating drilling platform spudcan structure test device and method has the beneficial effects that:

[0030] The self-elevating drilling platform spudcan structure test device and method of the embodiment of the application seals the plugging plate at the ladder opening of the ladder of the spudcan, so that a complete airbag cabin is formed in the spudcan, the air pipe and the water pipe are installed on the plugging plate, the airbag cabin is filled with water through the water pipe, and the airbag cabin is pressurized through the air pipe, so that the pressure in the airbag cabin reaches a set pressure value, the pressure requirement of the water pressure head height value required by the cabin during the spudcan structure test is met, and there is no need to manufacture a height difference, thereby avoiding the complex operation of pulling tens of meters or even hundreds of meters of water pipe, and the structure is simple, the operation is convenient and fast, and the work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic diagram of the self-elevating drilling platform spudcan structure test device described in the embodiment of the application;

[0032] Figure 2 is a partial enlarged schematic diagram of part A in Figure 1

[0033] Figure 3 is a B-B view in Figure 2

[0034] Figure 4 is a flowchart of the self-elevating drilling platform spudcan structure test method described in the embodiment of the application;

[0035] In the figure, 10, spudcan; 101, ladder; 102, top plate;

[0036] 1, plugging plate; 2, water pipe; 3, air pipe; 4, pressurizing device; 5, first safety valve; 6, second safety valve; 7, barometer. DETAILED DESCRIPTION

[0037] ​​In the description of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] The specific embodiments of the present application are described in further detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0040] As shown in Figure 1 - Figure 3 The pile shoe structure test device of the self-elevating drilling platform of the embodiment of the present application includes a plugging plate 1, a water pipe 2, a water supply device, an air pipe 3 and a pressure boosting device 4, wherein the plugging plate 1 is used to plug the ladder opening of the ladder 101 of the pile shoe 10 to form a whole air bag cabin inside the pile shoe 10; the plugging plate 1 is provided with a through hole through which the water pipe 2 passes and a through hole through which the air pipe 3 passes; the bottom end of the water pipe 2 passes through the plugging plate 1 and extends into the air bag cabin, and the top end of the water pipe 2 is placed above the plugging plate 1; the water supply device is connected with the top end of the water pipe 2 and is used to supply water into the air bag cabin; the top end of the air pipe 3 is placed above the plugging plate 1, and the bottom end of the air pipe 3 passes through the plugging plate 1 and extends into the air bag cabin; the pressure boosting device 4 is connected with the top end of the air pipe 3, and the pressure boosting device 4 is used to increase the air pressure of the air bag cabin so that the pressure in the air bag cabin reaches a set pressure value.

[0041] The present application blocks the plugging plate 1 at the ladder opening of the ladder 101 of the pile shoe 10, so that a complete airbag chamber is formed inside the pile shoe 10, the air pipe 3 and the water pipe 2 are installed on the plugging plate 1, water is filled into the airbag chamber through the water pipe 2, the airbag chamber is pressurized through the air pipe 3, so that the pressure in the airbag chamber reaches the set pressure value, meets the pressure requirement generated by the water pressure head height value required by the chamber during the pile shoe structure test, and does not need to manufacture height difference, avoids the complex operation of pulling tens of meters or even hundreds of meters of water pipe, has simple structure, convenient and fast operation, and improves work efficiency. Moreover, the plugging plate 1 is installed by means of the ladder 101 of the pile shoe 10 itself, without the need of additionally increasing a partition plate inside the pile shoe 10 or inside the pile leg to isolate airtight space, so that the structure is simple and the test cost is low.

[0042] In the embodiment, the height of the top end position of the air pipe 3 is greater than the height of the chamber top position of the pile shoe 10, so that the water level height overflowing in the air pipe 3 is higher than the height of the chamber top position of the pile shoe 10, so that the set pressure value is closer to the pressure requirement generated by the water pressure head height value required by the chamber, and the accuracy of the test result is improved.

[0043] In the embodiment, the first safety valve 5 is arranged between the top end of the water pipe 2 and the plugging plate 1, and the second safety valve 6 is arranged between the top end of the air pipe 3 and the plugging plate 1, so as to ensure the safety of the test process, reduce the safety risk, and avoid the explosion of the water pipe 2 due to excessive water pressure.

[0044] In the embodiment, the air pressure gauge 7 is installed on the air pipe 3, and the air pressure in the air pipe 3 is monitored through the air pressure gauge 7, so as to accurately determine the pressure value in the airbag chamber, and improve the accuracy of the test result.

[0045] In the embodiment, the pressure increasing device 4 is a pressure increasing pump.

[0046] The air pressure gauge range and the power of the pressure increasing pump in the embodiment are matched with the pile shoe 10. The air pressure gauge 7 and the pressure increasing pump are selected by corresponding water pressure requirements, and are complementary to increase or decrease. In order to ensure test safety, a certain proportion greater than the corresponding experimental requirements can be ensured.

[0047] As shown in Figure 4 The test method of the pile shoe structure test device of the self-elevating drilling platform according to the present application comprises the following steps:

[0048] Step S1, the plugging plate 1 is blocked at the ladder opening of the ladder 101 of the pile shoe 10, so that an airbag chamber is formed inside the pile shoe 10, and the structure composition of the test device is simplified by means of the ladder 101 of the pile shoe 10 itself, so that the operation is simple and the manufacturing is convenient;

[0049] Step S2, installing the water pipe 2 and the gas pipe 3 on the blocking plate 1, and the bottom end of the water pipe 2 and the bottom end of the gas pipe 3 extend into the air bag cabin respectively;

[0050] Step S3, injecting water into the water pipe 2 through the water supply device until the air bag cabin is filled with water, and the water height in the gas pipe 3 reaches the top height position of the pile shoe cabin; then closing the water supply device and the first safety valve 5 on the water pipe 2;

[0051] Step S4, increasing the air pressure in the air bag cabin through the pressure increasing device 4 until the pressure in the air bag cabin reaches the set pressure value; specifically, the pressure increasing device 4 is a pressure increasing pump, the maximum water depth total height H1 of the design requirement of the pile shoe 10 is calculated, the pressure increasing test is carried out according to H1 / 10 kg pressure, the pressure increasing pump is used to increase the pressure, and the pressure in the air bag cabin reaches the set pressure value;

[0052] Step S5, performing the strength test inspection on the air bag cabin of the pile shoe 10.

[0053] The present application does not need to make the cabin top height value of the air bag cabin too high, and does not need to separate a gas-tight cabin in the pile leg or the pile shoe 10, but forms a complete air bag cabin by blocking the ladder 101 of the pile shoe 10 through the blocking plate 1, supplies water and air pressure to the air bag cabin, makes the pressure in the air bag cabin reach the pressure value required by the water pressure head, meets the structural test conditions, is simple in operation, improves the work efficiency, and reduces the test cost.

[0054] Further, in step S1, the cross-sectional shape of the blocking plate 1 is the same as that of the ladder opening, and the blocking plate 1 is arranged to cover the ladder opening. The material of the blocking plate 1 is the same as that of the top plate 102 of the pile shoe 10, so as to ensure the integrity of the air bag cabin and the uniformity of the stress of the outer wall of the air bag cabin.

[0055] In the embodiment, in step S2, the top end of the water pipe 2 and the top end of the gas pipe 3 are both arranged above the blocking plate 1, and the position height of the top end of the water pipe 2 is higher than the cabin top height of the pile shoe 10.

[0056] In the embodiment, the step S4 comprises:

[0057] Step S41, calculating the hydrostatic pressure required by the air bag cabin, wherein the hydrostatic pressure is the water pressure value generated by the water pressure head required by the cabin to the pile shoe 10;

[0058] Step S42, starting the pressure increasing device 4, opening the second safety valve 6 on the gas pipe 3, and measuring the air pressure in the gas pipe 3 through the air pressure gauge 7;

[0059] Step S43, when the pressure value measured by the air pressure gauge 7 reaches the hydrostatic pressure value, closing the pressure increasing device 4 and the second safety valve 6.

[0060] Further, after the step S43, the method further comprises: observing whether the pressure value measured by the barometer 7 changes within a set time, and the set time can be 1 min to 2 min. If the pressure value measured by the barometer 7 does not change within the set time, the step S5 is performed; if the pressure value measured by the barometer 7 changes within the set time, the step S42 and the step S43 are repeatedly performed until the pressure value measured by the barometer 7 does not change within the set time.

[0061] In the step S5, the structural strength test is performed by checking whether the spudcan structure is deformed or leaks.

[0062] It should be noted that the spudcan structure test device and method of the self-elevating drilling platform of the present application is suitable for the truss type leg. The present application is particularly suitable for the case where the hydrostatic test cannot be performed due to the limitation of actual test conditions.

[0063] In summary, the spudcan structure test device and method of the self-elevating drilling platform of the present application seals the ladder opening of the ladder 101 of the spudcan 10 with the sealing plate 1, so that a complete airbag cabin is formed inside the spudcan 10. The air pipe 3 and the water pipe 2 are installed on the sealing plate 1, water is filled into the airbag cabin through the water pipe 2, and the airbag cabin is pressurized through the air pipe 3, so that the pressure in the airbag cabin reaches the set pressure value, the pressure requirement of the water pressure head height value required by the cabin during the spudcan structure test is met, and the height difference does not need to be made, avoiding the complex operation of pulling tens of meters or even hundreds of meters of water pipe. The structure is simple, the operation is convenient and fast, and the work efficiency is improved.

[0064] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and replacements without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A test apparatus for a spudcan structure of a jack-up drilling platform, characterized by, The utility model relates to a kind of airbag cabin test device for pile shoe, including: Blocking plate, the blocking plate is used to block the ladder mouth of ladder of pile shoe, to form airbag cabin inside pile shoe; Water pipe, the bottom end of the water pipe is inserted into the airbag cabin through the blocking plate; Water supply device, the top end of the water pipe is connected with water supply device, for water supply to the airbag cabin; Air pipe, the bottom end of the air pipe is inserted into the airbag cabin through the blocking plate; Pressure increasing device, the top end of the air pipe is connected with pressure increasing device, and the pressure increasing device is used to increase the air pressure of the airbag cabin, so that the pressure in the airbag cabin reaches set pressure value; The top end position height of the air pipe is greater than the cabin top position height of pile shoe, so that the water level height overflowed in the air pipe is higher than the cabin top position height of pile shoe; Safety valve is arranged between the top end of the water pipe and the blocking plate, and between the top end of the air pipe and the blocking plate; Air pressure gauge is installed on the air pipe.

2. The test apparatus for a spudcan structure of a jack-up drilling platform according to claim 1, wherein The pressure increasing device is pressure pump.

3. A method for testing a spud can structure of a jack-up drilling platform using the apparatus of claim 1, wherein Including the following steps: Step S1, blocking plate is blocked in the ladder mouth of ladder of pile shoe, so that airbag cabin is formed inside pile shoe; Step S2, water pipe and air pipe are installed on blocking plate, and the bottom end of water pipe and the bottom end of air pipe are inserted into airbag cabin respectively; Step S3, water is injected into water pipe by water supply device until airbag cabin is filled with water, and the height of water in air pipe reaches the cabin top height position of pile shoe; Step S4, the air pressure in airbag cabin is increased by pressure increasing device until the pressure in airbag cabin reaches set pressure value; Step S5, strength test inspection is carried out on airbag cabin of pile shoe; The step S4 includes: Step S41, the hydrostatic pressure pressure required by airbag cabin is calculated; Step S42, pressure increasing device is started, safety valve is opened, and air pressure in air pipe is measured by air pressure gauge; Step S43, when the pressure value measured by air pressure gauge reaches hydrostatic pressure pressure value, pressure increasing device and safety valve are closed.

4. The method of testing a spudcan structure of a jack-up drilling platform according to claim 3, wherein, After the step S43, it also includes: Whether the pressure value measured by air pressure gauge changes in set time is observed, if the pressure value measured by air pressure gauge does not change in set time, step S5 is carried out, if the pressure value measured by air pressure gauge changes in set time, step S42 and step S43 are repeated.

5. The method of claim 3, wherein, In the step S1, the material of blocking plate is same as the material of pile shoe top plate.

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