CN216973479U - Deepwater installation device of cylindrical foundation - Google Patents
Deepwater installation device of cylindrical foundation Download PDFInfo
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- CN216973479U CN216973479U CN202122561944.4U CN202122561944U CN216973479U CN 216973479 U CN216973479 U CN 216973479U CN 202122561944 U CN202122561944 U CN 202122561944U CN 216973479 U CN216973479 U CN 216973479U
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- cylindrical foundation
- cylindrical
- foundation
- guide hole
- coiled tubing
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Abstract
The utility model relates to a deepwater installation device of a cylindrical foundation, which comprises a continuous oil pipe, a conversion joint, a releaser and a cylindrical foundation, wherein the conversion joint is arranged on the continuous oil pipe; the lower end of the continuous oil pipe is connected into the conversion joint from top to bottom, the upper end of the continuous oil pipe is connected with a high-pressure air source, the releaser is arranged above the cylindrical foundation, a guide hole is formed in the cylindrical foundation, the upper end of the guide hole penetrates through the upper end face of the cylindrical foundation from bottom to top and extends into the releaser, and the lower end of the conversion joint is connected into the releaser and is in tight contact with the upper end port of the guide hole; the device mainly injects high-pressure air into the cylindrical foundation through the high-pressure air source, and adjusts the buoyancy borne by the cylindrical foundation by controlling the volume of the air in the cylindrical foundation, so that the sinking speed and the stability of the cylindrical foundation are controlled by combining the dead weight.
Description
Technical Field
The utility model relates to the technical field of underwater wellhead installation, in particular to a deepwater installation device of a cylindrical foundation.
Background
At present, a cylindrical foundation generally adopts a cylindrical structure with a closed upper end and an open lower end, and is mainly applied to building an underwater wellhead.
With the continuous development of seabed resources in China, the cylindrical foundation is used as an installation platform of underwater equipment and is more and more widely applied to various seabed development projects. At the present stage, the cylindrical foundation is usually launched by hoisting when being installed, and in a deep sea environment, the cylindrical foundation is easily influenced by wave flow due to the overlong used hoisting cable, so that hard pulling between the cylindrical foundation and the hoisting rope is easily caused, the interaction force between the cylindrical foundation and the hoisting rope is further overlarge, the hoisting rope or the cylindrical foundation is easily damaged, the sinking speed and stability of the cylindrical foundation cannot be controlled in the sinking process, and the installation work of the cylindrical foundation cannot be completed with high quality.
SUMMERY OF THE UTILITY MODEL
In view of this, in order to control the sinking speed and stability of the cylindrical foundation and avoid the problem that the cylindrical foundation is damaged due to the fact that the pulling force of the cylindrical foundation on the lifting rope is too large, the embodiment of the utility model provides a deepwater installation device of the cylindrical foundation.
The embodiment of the utility model provides a deepwater installation device of a cylindrical foundation, which comprises:
a cylindrical foundation with a closed upper end and an open lower end;
the upper end of the guide hole penetrates through the upper end face of the cylindrical foundation from bottom to top and extends to the upper part of the cylindrical foundation;
the lower end of the releaser is sleeved on the upper end of the guide hole;
the lower end of the conversion joint is connected into the releaser and is contacted with the upper port of the guide hole;
the lower end of the coiled tubing is connected into the inside of the adapter, and the upper end of the coiled tubing is connected with a high-pressure air source on the ground;
the high-pressure air injected by the coiled tubing is input into the cylindrical foundation through the guide hole, so that part of the upper part of the cylindrical foundation is always air in the sinking process, the buoyancy of the cylindrical foundation is increased, the pulling force applied to the coiled tubing is further reduced, and the sinking speed and stability of the cylindrical foundation are controlled by controlling the flow of the injected high-pressure air.
Further, the guide hole is tubular in shape, and the lower port of the guide hole is located in the middle of the cylindrical foundation.
Further, the device comprises at least one pressure release valve, each pressure release valve is arranged on the upper end face of the cylindrical foundation, and all the pressure release valves are in communication connection with a controller on the ground.
Further, the decoupler is configured to decouple the crossover sub from the cylindrical foundation.
Further, the conversion joint is tightly connected with the coiled tubing and is connected with the releaser in a sealing mode.
Furthermore, an underwater electric compass and an inclinometer are arranged on the outer wall of the cylindrical foundation and are in communication connection with a display on the ground.
Further, the cylindrical foundation is a steel thin-walled cylindrical structure.
The technical scheme provided by the embodiment of the utility model has the following beneficial effects: the deepwater installation device of the cylindrical foundation is provided, high-pressure air is injected into the cylindrical foundation, so that a part of air is always arranged at the upper part of the cylindrical foundation in the sinking process, the borne buoyancy is increased, the pulling force borne by a coiled tubing is further reduced, and the problem that the coiled tubing and the coiled tubing are damaged is avoided; by controlling the injection of high pressure air; the closing of the flow and the pressure release valve is used for adjusting the buoyancy force borne by the cylindrical foundation and controlling the sinking speed and stability of the cylindrical foundation by combining the dead weight; the device has simple integral structure and easy operation method, and can reduce the installation cost while ensuring the installation quality of the cylindrical foundation.
Drawings
FIG. 1 is a schematic view of the deep water installation of a cylindrical foundation of the present invention;
FIG. 2 is a top view of the device of FIG. 1;
FIG. 3 is a schematic view of the interior of the cylindrical foundation 5 of FIG. 1 during sinking;
FIG. 4 is a schematic illustration of the regulation of stationarity during the sinking of the cylindrical foundation 5 of FIG. 1 during inclination;
FIG. 5 is a schematic view of the cylindrical foundation 5 of FIG. 1 submerged into the underwater mud surface by its own weight;
FIG. 6 is a schematic view of the cylindrical foundation 5 of FIG. 1 installed by water pressure;
in the figure: the device comprises a coiled tubing 1, a crossover joint 2, a releaser 3, a pressure relief valve 4, a cylindrical foundation 5, a guide hole 6, air 7, water 8 and a mud surface 9.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 and 2, an embodiment of the present invention provides a deepwater installation apparatus for a cylindrical foundation, which is mainly applied to the field of underwater wellhead installation, and the apparatus mainly includes: coiled tubing 1, crossover sub 2, decoupler 3 and cylindrical foundation 5.
The shape of the cylindrical foundation 5 is a steel thin-wall cylindrical structure with a closed upper end and an open lower end, the upper end of the cylindrical foundation is provided with the releaser 3, the lower end of the coiled tubing 1 is provided with the adapter 2, the upper end of the coiled tubing is connected with a high-pressure air source on the ground, and the adapter 2 is connected into the releaser 3, so that high-pressure air output by the high-pressure air source can be injected into the cylindrical foundation 5 through the coiled tubing 1, the buoyancy of the cylindrical foundation 5 can be adjusted by controlling the flow of the injected high-pressure air, the tension of the coiled tubing 1 can be reduced, the sinking speed of the cylindrical foundation 5 under water can be controlled, and the stability can be ensured.
The inner part of the cylindrical foundation 5 is provided with a guide hole 6 along the central axis, the guide hole 6 is of a tubular structure, the upper end of the guide hole 6 penetrates through the upper end face of the cylindrical foundation 5 and extends to the upper part of the cylindrical foundation 5, the lower end of the releaser 3 is sleeved on the upper end of the guide hole 6, the upper end opening of the guide hole 6 is positioned in the releaser 3, the lower end of the conversion joint 2 is connected into the releaser 2 from top to bottom and is tightly contacted with the upper end opening of the guide hole 6, and therefore high-pressure air output by the high-pressure air source on the ground can be injected into the cylindrical foundation 5.
The release device 3 is used for separating the crossover joint 2 from the cylindrical foundation 5 after the cylindrical foundation 5 is installed, so that the coiled tubing 1 can be released from the cylindrical foundation 5.
The conversion joint 2 is connected with the releaser 3 in a sealing way.
Referring to fig. 3, the lower port of the guiding hole 6 is located in the middle of the cylindrical foundation 5, so that the guiding function can be performed on the high-pressure air injected into the cylindrical foundation 5, the upper part of the cylindrical foundation 5 is air 7, and the lower part of the cylindrical foundation 5 is water 8 during the sinking process, the buoyancy applied to the cylindrical foundation 5 can be adjusted by controlling the volume of the air 7 on the upper part of the cylindrical foundation 5, so that the pulling force applied to the coiled tubing 1 can be reduced, the sinking speed of the cylindrical foundation 5 can be controlled, and the water in the cylindrical foundation 5 can be pumped out according to the requirement.
The upper end of the cylindrical foundation 5 is provided with a pressure release valve 4, the pressure release valve 4 is in communication connection with a controller on the ground, and the pressure release valve 4 is used for adjusting the volume of high-pressure air inside the cylindrical foundation 5, so that the sinking speed of the cylindrical foundation 5 can be controlled by combining the flow rate of the high-pressure air.
Referring to fig. 4, when the cylindrical foundation 5 is inclined during the sinking process, the relief valve 4 is opened and the high-pressure air injection flow rate is reduced to reduce the air volume at the upper part of the cylindrical foundation 5, so that the stability can be adjusted by using the gravity of the cylindrical foundation 5, the traction force of the coiled tubing 1 on the cylindrical foundation 5, and the buoyancy force to which the cylindrical foundation 5 is subjected.
The outer wall of the cylindrical foundation 5 is provided with an underwater electric compass and an inclinometer, the underwater electric compass and the inclinometer are used for detecting whether the cylindrical foundation 5 inclines in the sinking process, and the underwater electric compass and the inclinometer are in communication connection with an on-ground display, so that whether the cylindrical foundation 5 inclines can be observed in real time through the on-ground display.
In this embodiment, at first, put into aquatic with cylindric basis 5 through outside hoisting equipment, start high pressurized air source, through coiled tubing 1 to inject the air into cylindric basis 5, make cylindric basis 5 is inside when sinking partly be the air, through the flow of control air injection and the closure of relief valve 4 adjusts the size of the inside air volume of cylindric basis 5, thereby control the size of the buoyancy that receives when cylindric basis 5 sinks, and then control its speed of sinking.
Secondly, when the cylindrical foundation 5 inclines during sinking, the buoyancy received by the cylindrical foundation 5 can be reduced by reducing the internal air volume, and the smoothness of the cylindrical foundation 5 can be adjusted by combining the self-gravity of the cylindrical foundation 5 and the traction of the coiled tubing 1 to the cylindrical foundation 5.
Finally, when the cylindrical foundation 5 reaches the surface of the water bottom mud, the flow rate of air injection is continuously reduced, the cylindrical foundation 5 is made to sink into mud primarily by means of the self weight of the cylindrical foundation 5, then the residual air and water in the cylindrical foundation 5 are pumped out through the coiled tubing 1, so that the pressure difference exists between the inside of the cylindrical foundation 5 and the outside, the cylindrical foundation 5 is extruded by using the outside water pressure, the cylindrical foundation 5 sinks into mud again, and then the conversion joint 2 is separated from the cylindrical foundation 5 through the releaser 3, so that the installation of the cylindrical foundation 5 is completed.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (7)
1. A deep water installation of a cylindrical foundation, comprising:
a cylindrical foundation with a closed upper end and an open lower end;
the upper end of the guide hole penetrates through the upper end face of the cylindrical foundation from bottom to top and extends to the upper part of the cylindrical foundation;
the lower end of the releaser is sleeved on the upper end of the guide hole;
the lower end of the conversion joint is connected into the releaser and is contacted with the upper port of the guide hole;
the lower end of the coiled tubing is connected into the inside of the adapter, and the upper end of the coiled tubing is connected with a high-pressure air source on the ground;
the high-pressure air injected by the coiled tubing is input into the cylindrical foundation through the guide hole, so that part of the upper part of the cylindrical foundation is always air in the sinking process, the buoyancy of the cylindrical foundation is increased, the pulling force applied to the coiled tubing is further reduced, and the sinking speed and stability of the cylindrical foundation are controlled by controlling the flow of the injected high-pressure air.
2. A deep water installation device of a cylindrical foundation as claimed in claim 1, wherein: the guide hole is tubular in shape, and the lower port of the guide hole is positioned in the middle of the cylindrical foundation.
3. A deep water installation device of a cylindrical foundation as claimed in claim 1, wherein: the device comprises at least one pressure release valve, wherein each pressure release valve is arranged on the upper end face of the cylindrical foundation, and all the pressure release valves are in communication connection with a controller on the ground.
4. A deep water installation device of a cylindrical foundation as claimed in claim 1, wherein: the release is configured to separate the adapter from the cylindrical base.
5. A deepwater installation of a cylindrical foundation as set forth in claim 1, wherein: the conversion joint is tightly connected with the coiled tubing and is hermetically connected with the releaser.
6. A deep water installation device of a cylindrical foundation as claimed in claim 1, wherein: and an underwater electric compass and an inclinometer are arranged on the outer wall of the cylindrical foundation and are in communication connection with a display on the ground.
7. A deep water installation device of a cylindrical foundation as claimed in claim 1, wherein: the cylindrical foundation is a steel thin-wall cylindrical structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122561944.4U CN216973479U (en) | 2021-10-22 | 2021-10-22 | Deepwater installation device of cylindrical foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122561944.4U CN216973479U (en) | 2021-10-22 | 2021-10-22 | Deepwater installation device of cylindrical foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216973479U true CN216973479U (en) | 2022-07-15 |
Family
ID=82344565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122561944.4U Active CN216973479U (en) | 2021-10-22 | 2021-10-22 | Deepwater installation device of cylindrical foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216973479U (en) |
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2021
- 2021-10-22 CN CN202122561944.4U patent/CN216973479U/en active Active
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