CN216240531U - Christmas tree protection device suitable for soft and hard seabed - Google Patents
Christmas tree protection device suitable for soft and hard seabed Download PDFInfo
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- CN216240531U CN216240531U CN202122523945.XU CN202122523945U CN216240531U CN 216240531 U CN216240531 U CN 216240531U CN 202122523945 U CN202122523945 U CN 202122523945U CN 216240531 U CN216240531 U CN 216240531U
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Abstract
The utility model relates to a Christmas tree protection device suitable for soft and hard seabed, which is characterized by comprising: the anti-sinking plate unit is approximately in a horizontal frame structure, and the center of the anti-sinking plate unit is penetrated; the peripheral surface of the grid unit is of a grid cover type structure, and the lower end of the grid unit is fixedly connected to the anti-sinking plate unit; and the hoisting unit comprises a lifting tool, the upper end of the lifting tool is provided with a cylindrical threaded structure and is configured to be connected with a drill rod, and the lower end of the lifting tool is connected with the upper edge of the grid unit. The device can be conveniently, quickly and stably installed underground, and can effectively protect the underwater Christmas tree on soft and hard seabed.
Description
Technical Field
The utility model relates to the technical field of oil exploitation, in particular to a Christmas tree protection device suitable for soft and hard seabed.
Background
An underwater Christmas tree is applied to the offshore oil industry and is mainly used for suspending a tubing string which is put into a well, sealing the annular space of an oil casing, controlling and adjusting the production of an oil well, and ensuring the daily production management of operation, oil extraction, casing pressure, testing, paraffin removal and the like. During the service period of the underwater Christmas tree, falling loads and horizontal fishing net dragging loads are very likely to be encountered, so that the safety problem of the underwater Christmas tree is widely concerned by the ocean engineering communities of various countries, and devices capable of protecting the underwater Christmas tree are researched and produced in a dispute so as to protect the underwater Christmas tree.
How to design a protection device which is convenient to lower and install and can effectively protect an underwater Christmas tree on soft and hard seabed is a current difficult problem.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to provide a protection device which can be conveniently lowered and installed and can effectively protect an underwater Christmas tree on soft and hard seabed.
The utility model provides a Christmas tree protection device suitable for soft and hard seabed, which comprises:
the anti-sinking plate unit is approximately in a horizontal frame structure, and the center of the anti-sinking plate unit is penetrated;
the peripheral surface of the grid unit is of a grid cover type structure, and the lower end of the grid unit is fixedly connected to the anti-sinking plate unit;
and the hoisting unit comprises a lifting tool, the upper end of the lifting tool is provided with a cylindrical threaded structure and is configured to be connected with a drill rod, and the lower end of the lifting tool is connected with the upper edge of the grid unit.
According to an embodiment of the utility model, the hoisting unit further comprises a J-shaped groove structure, the J-shaped groove structure comprises a cylindrical body, the circumference of the cylindrical body is provided with a "J" shaped slot configured to be connected with a hook, the lifting tool is connected with the J-shaped groove structure, and the J-shaped groove structure is fixedly connected with the grid unit.
According to one embodiment of the present invention, the "J" shaped slots are a group and are uniformly arranged on the circumference of the cylindrical body.
According to an embodiment of the present invention, the J-shaped groove structure further includes a connector assembly having a rod-shaped structure layered up and down, respectively extending from the cylindrical body to the grid unit.
According to one embodiment of the utility model, each layer of the connector assembly is provided with a plurality of rods which are uniformly distributed, and the horizontal projections of the rods of the upper layer and the lower layer are not coincident.
According to an embodiment of the utility model, the hoisting unit further comprises a lifting lug structure provided at an upper edge of the grid unit, the lifting lug structure being configured for connection with a spreader.
According to an embodiment of the utility model, the shackle structure comprises a plurality of shackles, evenly distributed in the circumferential direction.
According to one embodiment of the utility model, the lifting tool comprises a thick tube at the lower end, a thin tube at the upper end and an annular support plate in the middle, a triangular support plate rib is arranged between the thin tube and the annular support plate, a steel pin protruding in the radial direction is arranged on the thick tube, and a threaded screw thread is arranged at the upper end of the thin tube and used for connecting a drill rod.
According to one embodiment of the utility model, the outer frame of the anti-sink plate unit is rectangular, a rectangular inner frame is arranged in the center of the outer frame, and a skirtboard structure is arranged between the outer frame and the inner frame; the grid unit comprises four grid side faces which are connected in sequence, and the side faces are provided with openable windows, so that the jumper tube can be connected back and forth conveniently.
According to an embodiment of the present invention, the apparatus further comprises a sacrificial anode unit including an anode block, the sacrificial anode unit being connected to the anti-sink plate unit.
The device of the utility model adopts the anti-sinking plate structure, and can adjust the depth of the anti-sinking plate unit entering the mud according to different soil qualities, thereby being suitable for being used for fixing on soft and hard seabed.
The hoisting unit can be connected with the drill rod, so that the device can avoid shaking and large errors in position centering caused by wind and wave impact in the process of lowering the device to the seabed, can be stably covered outside the underwater Christmas tree, has a simple structure, is convenient to use, and can improve the efficiency of seabed operation.
Drawings
FIG. 1 is a schematic axial side view of an apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic side view of a lifting tool according to an embodiment of the present invention;
FIG. 3 is an axial schematic view of a J-slot configuration in accordance with one embodiment of the present invention;
figure 4 is a side schematic view of a shackle structure according to an embodiment of the utility model;
fig. 5 is a schematic top view of the anti-sink plate unit and the sacrificial anode unit according to an embodiment of the utility model;
FIG. 6 is a schematic axial side view of a grid unit and a hoisting unit according to an embodiment of the present invention;
fig. 7 is a schematic axial side view of a sacrificial anode unit according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the utility model can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.
In order to achieve the purpose, the utility model adopts the following technical scheme:
as shown in fig. 1, the present invention provides a christmas tree guard suitable for a soft and hard seabed, the guard comprising:
the anti-sinking plate unit 10 is approximately in a horizontal frame structure, and the center of the anti-sinking plate unit is penetrated;
the peripheral surface of the grid unit 20 is of a grid cover type structure, and the lower end of the grid unit is fixedly connected to the anti-sinking plate unit;
the hoist unit 30 comprises a lifting tool 31 provided with a cylindrical screw structure at its upper end configured to be connected to a drill rod, and connected at its lower end to the upper edge of the grid unit.
The device can be covered on the periphery of the Christmas tree to play a role in protecting the Christmas tree, a hoisting unit of the device can be directly connected with a drill rod during hoisting, the device is lowered to the periphery of the Christmas tree on the seabed, the operation is fast and stable, the anti-sinking plate unit 10 can pass through the Christmas tree to be placed on the seabed, the frame structure is directly contacted with the seabed, the contact area is large, and therefore the whole device is stable; the grid unit 20 covers the periphery of the Christmas tree, not only can protect the Christmas tree, but also can facilitate the pipeline connection.
As shown in fig. 3, according to an embodiment of the present invention, the hoisting unit 30 further includes a J-shaped groove structure 32, the J-shaped groove structure 32 includes a cylindrical body 321, a circumferential surface of the cylindrical body is provided with a "J" shaped slot 3211 configured to be connected with a hook, the lifting tool 31 is connected with the J-shaped groove structure 32, and the J-shaped groove structure 32 is fixedly connected with the grid unit 20. The fixing can be generally realized by welding.
Design J-shaped groove structure 32 provides another optional mode for the hoist and mount of device, can adopt the form hoist device of lifting hook, can select different hoist and mount modes according to specific environment, for example under the little circumstances of external disturbance factors such as stormy waves, can adopt the form of this kind of lifting hook to hoist, and the lifting hook just in time can be hooked in "J" shape fluting 3211, hoists the device and transports.
According to an embodiment of the present invention, the "J" shaped slots 3211 are a set and are uniformly arranged on the circumference of the cylindrical body 321.
According to an embodiment of the present invention, the J-shaped groove structure 32 further includes a connector assembly 322 having a rod-shaped structure layered up and down and extending from the cylindrical body 321 to the grid unit 20, respectively.
According to one embodiment of the present invention, connector assembly 322 provides a plurality of rods distributed evenly throughout each layer, with the horizontal projections of the rods of the upper and lower layers not coinciding.
As shown in fig. 1 and 4, according to an embodiment of the present invention, the hoist unit 30 further includes a lifting lug structure 33, the lifting lug structure 33 is provided at an upper edge of the grid unit 20, and the lifting lug structure 33 is configured to be connected to a spreader.
The design of the shackle structure 33 provides an alternative means for lifting the device, i.e. it may be connected to a flexible member in the form of a lifting rope or a chain, or it may be used in situations where external disturbance factors such as wind and waves are not significant, and is particularly suitable for use when the drill ship is not at the work site.
According to one embodiment of the utility model, the shackle structure 33 comprises a plurality of lugs, evenly distributed in the circumferential direction.
According to one embodiment of the present invention, as shown in fig. 2, the lifting tool 31 comprises a thick tube 311 at the lower end, a thin tube 312 at the upper end, and an annular support plate 313 in the middle, a triangular support rib 3131 is arranged between the thin tube 312 and the annular support plate 313, a steel pin 3111 protruding in the radial direction is arranged on the thick tube 311, and for guiding, a thread screw is arranged at the upper end of the thin tube 312 for connecting a drill rod. The structure of the lifting tool is designed, so that the mounting is convenient.
As shown in fig. 1 and 5, according to an embodiment of the present invention, the outer frame of the anti-sink plate unit 10 has a rectangular shape, and a rectangular inner frame is provided at the center, and a skirt structure is provided between the outer frame and the inner frame, but it is not limited to this shape; accordingly, as shown in fig. 6, the grid unit 20 includes four grid sides connected in sequence to connect the rectangular frame surfaces of the anti-settling plate unit 10 at the bottom ends of the sides, respectively. The side face of the grid is provided with an openable window, so that the jumper tube can be conveniently connected in a back-to-back mode. Preferably, the side of the grid unit 20 is a trapezoid structure, and the upper port of the integral structure is small, and the lower port is large, so that the upper end of the integral structure is connected with the hoisting unit.
According to an embodiment of the present invention, as shown in fig. 1 and 7, the apparatus further includes a sacrificial anode unit 40 including an anode block, wherein the sacrificial anode unit 40 is connected to the anti-sink plate unit 10 for preventing corrosion of the main structure such as the anti-sink plate unit 10.
The device of the utility model adopts the anti-sinking plate structure, and can adjust the depth of the anti-sinking plate unit entering the mud according to different soil qualities, thereby being suitable for being used for fixing on soft and hard seabed.
The hoisting unit can be connected with the drill rod, so that the device can avoid shaking and large errors in position centering caused by wind and wave impact in the process of lowering the device to the seabed, can be stably covered outside the underwater Christmas tree, has a simple structure, is convenient to use, and can improve the efficiency of seabed operation.
Examples
As shown in fig. 1, a subsea tree protection device suitable for soft and hard seabed mainly comprises the following basic units: the anti-sinking plate unit 10, the grid unit 20 and the hoisting unit 30. Wherein the hoisting unit 30 comprises a lifting tool 31, a J-slot configuration 32 and a lifting lug configuration 33.
As shown in fig. 5, the anti-sinking plate unit 10 is composed of a square frame skirt plate and a plurality of reinforcing ribs welded to the square frame skirt plate, and the square frame skirt plate can be welded with a sacrificial anode block. The anti-sink plate unit 10 has no structure in the middle for allowing the subsea tree to enter the grid unit 20 for protection.
As shown in fig. 6, the grid unit 20 is a four-sided square-cover-shaped structure, each side of the square-cover-shaped structure is a trapezoidal structure with a middle portion composed of 4 transverse and longitudinal steel members, and a plurality of steel members surround the trapezoidal structure to form a nine-grid, the bottom end of the nine-grid is welded to the anti-sinking plate unit 10, and then the nine-grid is welded to the square-frame apron board of the anti-sinking plate unit 10 at an angle of 60-80 degrees by reinforcing ribs. The grid elements 20 have windows that can be opened to facilitate tieback of the jumper tubes.
As shown in fig. 1 and 4, each lifting lug structure 33 is composed of a lifting lug 331 and a diver-friendly handle 332, the cylindrical bottom of the lifting lug is welded to one end of a steel member slightly protruding from four sides of the grid unit 20, and the lifting lug is inclined and vertical after welding; a diver-friendly handle 332 is welded to the outer side of the steel member slightly protruding on the four sides of the grid cell 20.
As shown in fig. 3, the J-shaped groove structure 32 is composed of a steel pipe as a main body, 4 steel members on the upper portion and 4 steel members on the lower portion, 3J-shaped grooves are formed in the steel pipe, one end of each steel member is welded to the upper steel member on one side surface of the grid unit, the other end of each steel member is welded to the peripheral surface of the J-shaped groove structure at 90 degrees, adjacent upper steel members mutually form a 90-degree included angle, and the upper steel member and each adjacent lower steel member form a 45-degree included angle.
The lifting tool 31 consists of 1 thick steel pipe, 1 thin steel pipe, 3 triangular supporting plate ribs, 1 annular supporting plate and 3 steel pins, each steel pin 3111 is vertically welded in the middle of the peripheral surface of the thick steel pipe at 90 degrees, an included angle of 120 degrees is formed between each pair of steel pins 3111, and each steel pin 3111 consists of a thick steel rod and a thin steel rod; the lower surface of the annular supporting plate is welded on the peripheral surface of the thick steel pipe, and the upper surface of the annular supporting plate is welded on the peripheral surface of the thin steel pipe; the bottom of the triangular supporting plate rib is vertically welded on the annular supporting plate, and the side edge of the triangular supporting plate rib is vertically welded on the peripheral surface of the thin steel pipe. An included angle of 120 degrees is formed between each pair of triangular supporting plate ribs. The upper end of the thin steel pipe is provided with a thread for connecting a drill rod.
Each sacrificial anode unit comprises an aluminum-based or zinc-based elongated anode block, a supporting core/rod and a welding claw which are connected, and the structure can be realized by adopting the prior art, and is not described in detail herein.
The device of the utility model adopts the anti-sinking plate structure, combines the use of the skirt board, and can adjust the depth of the skirt board into mud according to different soil qualities, thereby being suitable for being used for fixing on soft and hard seabed.
During manufacturing, 4 lifting lug structures 33, lifting tools 31 and J-shaped groove structures 32 are welded on the grid unit 20 at a manufacturing site, and then the grid unit 20 is welded on the anti-sinking plate unit 10.
In use, the subsea tree guard may be transported to the target installation area by a barge or installation vessel via the lifting lug structure 33.
The lifting lug structure 33 can be connected through a crane and a lock on a drilling ship or an installation ship, or a lifting hook is connected with the J-shaped groove structure 32, or a combined lifting mode can be adopted, the underwater Christmas tree protection device is lowered to be close to the seabed by about 10 meters and then slowly moved to the position above the underwater Christmas tree, and the underwater Christmas tree protection device is slowly installed on the seabed under the observation and assistance of an ROV (remote operated vehicle) or a diver, and the underwater Christmas tree is positioned in the middle of the underwater Christmas tree.
Or the drill pipe of the drilling vessel is connected with the lifting tool 31, the underwater Christmas tree protection device is lowered, and the underwater Christmas tree protection device is slowly installed on the seabed under the observation and the assistance of an ROV or a diver, and the underwater Christmas tree is positioned in the middle of the underwater Christmas tree protection device.
The experiment calculation shows that under the dragging force of the horizontal fishing net of 25 tons, the Christmas tree protection device suitable for the soft and hard seabed is still stable, and the underwater Christmas tree placed in the Christmas tree protection device can be well protected.
It should be noted that, in this document, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In addition, in the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above embodiments are only used for illustrating the present invention, and all the components and devices of the embodiments may be changed, and all the equivalent changes and modifications based on the technical solutions of the present invention should not be excluded from the protection scope of the present invention.
Claims (10)
1. A christmas tree guard adapted for use on soft and hard seabed, said guard comprising:
the anti-sinking plate unit is approximately in a horizontal frame structure, and the center of the anti-sinking plate unit is penetrated;
the peripheral surface of the grid unit is of a grid cover type structure, and the lower end of the grid unit is fixedly connected to the anti-sinking plate unit;
and the hoisting unit comprises a lifting tool, the upper end of the lifting tool is provided with a cylindrical threaded structure and is configured to be connected with a drill rod, and the lower end of the lifting tool is connected with the upper edge of the grid unit.
2. The Christmas tree guard for soft and hard seabed as claimed in claim 1, wherein the hoisting unit further comprises a J-shaped groove structure, the J-shaped groove structure comprises a cylindrical body, the circumference of the cylindrical body is provided with a J-shaped slot configured to be connected with a hook, the lifting tool is connected with the J-shaped groove structure, and the J-shaped groove structure is fixedly connected with the grid unit.
3. The Christmas tree guard for soft and hard seabed as claimed in claim 2, wherein the J-shaped slots are a group and are uniformly arranged on the circumference of the cylindrical body.
4. The Christmas tree guard for a soft and hard seabed as claimed in claim 3, wherein the J-shaped groove structure further comprises a connector assembly in a rod-shaped structure layered up and down, respectively extending from the cylindrical body to the grid unit.
5. The Christmas tree guard for a soft and hard seabed as claimed in claim 4, wherein the connector assembly is provided with a plurality of rods distributed uniformly on each layer, and the horizontal projections of the rods on the upper and lower layers are not coincident.
6. The Christmas tree guard for soft and hard seabed as claimed in claim 1, 2 or 4, wherein the lifting unit further comprises a lifting lug structure provided at an upper edge of the grid unit, the lifting lug structure being configured to be connected with a lifting tool.
7. The Christmas tree guard for a soft and hard seabed as claimed in claim 6, wherein the lifting lug structure comprises a plurality of lifting lugs which are evenly distributed in the circumferential direction.
8. The Christmas tree protection device for the soft and hard seabed as claimed in claim 1, 2 or 4, wherein the lifting tool comprises a thick tube at the lower end, a thin tube at the upper end and a ring-shaped support plate in the middle, a triangular support plate rib is arranged between the thin tube and the ring-shaped support plate, the thick tube is provided with a steel pin protruding in the radial direction, and the upper end of the thin tube is provided with a threaded screw thread for connecting a drill rod.
9. The Christmas tree guard for soft and hard seabed as claimed in claim 8, wherein the outer frame of the anti-sinking plate unit is rectangular with a rectangular inner frame in the center, and a skirt structure is arranged between the outer frame and the inner frame; the grid unit comprises four grid side faces which are connected in sequence, and the side faces are provided with openable windows, so that the jumper tube can be connected back and forth conveniently.
10. The apparatus of claim 9, further comprising a sacrificial anode unit comprising an anode block, wherein the sacrificial anode unit is connected to the anti-sink plate unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122523945.XU CN216240531U (en) | 2021-10-20 | 2021-10-20 | Christmas tree protection device suitable for soft and hard seabed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122523945.XU CN216240531U (en) | 2021-10-20 | 2021-10-20 | Christmas tree protection device suitable for soft and hard seabed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216240531U true CN216240531U (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122523945.XU Active CN216240531U (en) | 2021-10-20 | 2021-10-20 | Christmas tree protection device suitable for soft and hard seabed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216240531U (en) |
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2021
- 2021-10-20 CN CN202122523945.XU patent/CN216240531U/en active Active
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