Detachable ice-resistant piton

Abstract

The utility model discloses a detachable ice-resistant piton which comprises a fixed piton body fixed on the inner side of a jacket main leg and a movable piton body detachably connected to the outer side of the jacket main leg. The fixed cone and the movable cone both comprise shells, side sealing plates are connected to the inner sides of the end faces of the shells, butt joint plates are connected to the outer sides of the end faces of the shells, and the butt joint plates of the fixed cone and the movable cone are connected through fastening bolts; an outer sealing plate is further arranged on the outer side of the jacket main leg on one side of the movable cone, and the outer sealing plate, the shell of the movable cone and the side sealing plate are connected into a whole. According to the detachable ice-resistant piton, the ice-resistant piton body outside the jacket is detached, so that the influence of the ice-resistant piton structure on in-place of a drilling ship is reduced, the ice-resistant performance of the jacket cannot be influenced, the ice-resistant piton is relatively simple to detach and install, and the drilling and completion operation cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of offshore oil engineering technology, especially to a detachable anti-ice cone. BACKGROUND

[0002] Bohai oilfield is an important crude oil production area in China, but the Bohai Bay will be covered with sea ice in winter, especially the Liaodong Bay sea area ice condition is more serious, which seriously affects the normal operation and safety production of jacket platforms. In order to effectively control the damage of sea ice to the jacket, considering the characteristics that the bending strength of natural sea ice is far less than the extrusion strength, the anti-ice cone structure composed of positive and inverted cone combination is usually installed at the tidal difference section of the jacket main leg, which effectively reduces the ice load by guiding the ice to be damaged by bending in front of the cone structure instead of extrusion in front of the vertical structure.

[0003] At present, the anti-ice cone is widely used in Bohai ice area platform as an effective anti-ice measure, however, the anti-ice cone is directly welded on the jacket main leg during the construction of the jacket on land, and forms a whole with the jacket structure. The fixed anti-ice cone will affect the coverage capacity of the drilling ship. When the drilling ship approaches the platform, it needs to maintain a certain safety distance from the outermost edge of the platform to meet the demand of safe positioning. Since the diameter of the anti-ice cone body structure is large, the longitudinal coverage range of the cantilever beam of the drilling ship is reduced. Replacing a larger coverage capacity drilling ship or repositioning the drilling ship will greatly increase the drilling cost. Therefore, in order to reduce the influence of the anti-ice cone structure on the positioning of the drilling ship, a detachable anti-ice cone needs to be developed. UTILITY MODEL CONTENTS

[0004] The utility model discloses to solve the problem that the existing anti-ice cone and other marine engineering structures (such as drilling ship) interfere with each other, and provides a detachable anti-ice cone. The utility model makes the anti-ice cone on the outside of the jacket main leg not affect the positioning of the drilling ship, ensures that the drilling ship can cover all well slots once positioned, effectively increases the coverage range of the drilling ship, reduces the selection ability limitation of the drilling ship, and reduces the oilfield development cost.

[0005] The utility model is implemented by adopting the following technical solutions.

[0006] A detachable anti-ice cone, comprising a fixed cone body fixed on the inside of the jacket main leg and a movable cone body detachably connected on the outside of the jacket main leg, the fixed cone body and the movable cone body both comprise a shell, a side sealing plate is connected on the inside of the end face of the shell, and a butt joint plate is connected on the outside of the end face of the shell, and the butt joint plates of the fixed cone body and the movable cone body are connected by fastening bolts, and the outside of the jacket main leg on one side of the movable cone body is further provided with an outer sealing plate, and the outer sealing plate is connected with the shell and the side sealing plate of the movable cone body as a whole.

[0007] Further, the shell comprises an upper shell and a lower shell, and the bottom edges of the upper shell and the lower shell are connected by a horizontal circular pipe ring.

[0008] Further, a vertical circular pipe ring is arranged at the connection of the fixed cone shell, the butt plate and the side sealing plate.

[0009] Further, a plurality of reinforcing rib plates are arranged in the shell in a vertical direction.

[0010] Further, a reinforcing support plate is arranged in the shell in a horizontal direction, and the reinforcing support plate is located in the middle of the shell.

[0011] Further, elbow plates are arranged on the butt plate in an equal interval.

[0012] Further, bolt holes are arranged on the butt plate in an equal interval, and fastening bolts are arranged in the bolt holes of the fixed cone and the movable cone.

[0013] Further, a lifting point is arranged on the movable cone.

[0014] The application has the following beneficial effects.

[0015] The anti-ice cone is designed to be detachable, when the drilling ship performs the drilling and completion operation, by removing the external anti-ice cone of the jacket, the drilling ship can be as close to the wellhead area as possible under the premise of meeting the minimum safety distance of the jacket, the longitudinal coverage range of the cantilever beam can cover all the wellhead area, the drilling resource does not need to be replaced or the drilling ship needs to be positioned again, after the drilling and completion operation is completed, the external anti-ice cone can be reinstalled, the anti-ice performance of the jacket is not affected, and the drilling and completion operation cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the utility model;

[0017] Figure 2 is Figure 1 is a schematic view of the section A in the direction;

[0018] Figure 3 is Figure 2 is a schematic view of the section B in the direction;

[0019] Figure 4 is Figure 2 is a schematic view of the section C in the direction;

[0020] Figure 5 is Figure 2 is a schematic view of the section D in the direction;

[0021] Figure 6 is Figure 2Schematic diagram of the cross section along the E direction;

[0022] Figure 7 for Figure 1 Schematic diagram of cross section in the middle F direction.

[0023] Figure 8 This is a schematic diagram of the horizontal circular tube ring.

[0024] Among them, 1. lower shell, 2. fixed cone, 3. movable cone, 4. main leg of the guide frame, 5. upper shell, 6. horizontal circular tube ring, 7. vertical circular tube ring, 8. elbow plate, 9. butt plate, 10. lifting point, 11. side sealing plate, 12. outer sealing plate, 13. reinforcing rib plate, 14. reinforcing support plate, 15. bolt hole, 16. fastening bolt, 17. pin. Detailed Implementation

[0025] The present patent application will be further described below with reference to the embodiments.

[0026] like Figures 1-7 As shown, a detachable anti-icing cone comprises two parts: a fixed cone 2 and a movable cone 3. The fixed cone 2 is located inside the main leg 4 of the duct frame, and the movable cone 3 is located outside the main leg 4 of the duct frame. The interface between the two is arranged longitudinally. Specifically, the fixed cone 2 surrounds the main leg 4 of the duct frame and is welded to it; the movable cone 3 surrounds the main leg 4 of the duct frame. The joint between the fixed cone 2 and the movable cone 3 is provided with a side sealing plate 11 and a mating plate 9, and they are connected by fastening bolts 16.

[0027] The fixed cone 2 includes an upper shell 5, a lower shell 1, reinforcing ribs 13, reinforcing support plates 14, side sealing plates 11, horizontal circular tube rings 6, vertical circular tube rings 7, and a mating plate 9. The bottom edges of the upper shell 5 and the lower shell 1 are connected by the horizontal circular tube rings 6 to form a shell that wraps around the main leg 4 of the guide frame. Side sealing plates 11 are provided on the inner side of both end faces of the shell, and mating plates 9 are provided on the outer side of both end faces of the shell. Specifically, the shell, side sealing plates 11, and mating plates 9 of the fixed cone 2 are welded together at the vertical circular tube rings 7.

[0028] The shell contains a reinforcing support plate 14 and several reinforcing ribs 13. The reinforcing ribs 13 are vertically arranged inside the shell, with their outer sides welded to the shell and their inner sides directly welded to the main legs 4. The reinforcing ribs 13 are evenly spaced within the shell. The reinforcing support plate 14 is horizontally arranged inside the shell, located at the junction of the upper shell 5 and the lower shell 1. The outer side of the reinforcing support plate 14 is connected to the horizontal circular tube ring 6, and its inner side is directly welded to the main legs 4. The reinforcing support plate 14 divides the fixed cone 2 into two independent watertight chambers. The reinforcing support plate 14 and reinforcing ribs 13 of this application are used to improve the strength and stability of the anti-ice cone.

[0029] The movable cone body 3 comprises an upper shell 5, a lower shell 1, a reinforcing rib plate 13, a reinforcing support plate 14, a side sealing plate 11, an outer sealing plate 12, a horizontal circular pipe ring 6 and an abutting plate 9. The bottom edges of the upper shell 5 and the lower shell 1 are connected by the horizontal circular pipe ring 6 to form a shell, and an outer sealing plate 12 is further arranged outside the jacket leg 4. The outer sealing plate 12 is a semicircular pipe structure and is attached to the jacket leg 4. A side sealing plate 11 is arranged between the end face of the shell and the outer sealing plate 12, and the outer sealing plate 12, the shell and the side sealing plate 11 are connected into an integral whole and wrapped around the jacket leg 4. An abutting plate 9 is arranged outside the end face of the shell.

[0030] A reinforcing support plate 14 and a plurality of reinforcing rib plates 13 are also arranged in the shell of the movable cone body 3. The reinforcing rib plates 13 are vertically arranged in the shell, welded to the shell outside and welded to the outer sealing plate 12 inside, and are arranged at equal intervals in the shell. The reinforcing support plate 14 is horizontally arranged in the shell and located at the joint of the upper shell 5 and the lower shell 1. The reinforcing support plate 14 is connected to the horizontal circular pipe ring 6 outside and welded to the outer sealing plate 12 inside, and separates the fixed cone body 2 into two independent water-tight chambers. The reinforcing support plate 14 and the reinforcing rib plate 13 are used to improve the strength and stability of the anti-ice cone.

[0031] After the fixed cone body 2 and the movable cone body 3 are connected to the jacket leg 4, a cone top is formed at the position of the maximum outer diameter of the anti-ice cone (the joint of the lower shell 1 and the upper shell 5). The horizontal circular pipe ring 6 arranged at the cone top ensures the close connection of the shell and the reinforcing support plate 14 and improves the overall structure and stability. The vertical circular pipe ring 7 is arranged at the end of the shell of the fixed cone body 2, and the shell of the fixed cone body 2 and the side sealing plate 11 are welded and connected at the vertical circular pipe ring 7. The vertical circular pipe ring 7 ensures that the fastening bolt 16 has sufficient pre-tightening force, strengthens the close connection of the fixed cone body 2 and the movable cone body 3, and ensures the anti-ice performance of the structure of the fixed cone body 2 before the movable cone body 3 is installed, thereby improving the overall structure and stability.

[0032] The abutting plate 9 of the fixed cone body 2 and the movable cone body 3 is provided with bolt holes 15 and elbow plates 8, which are arranged at equal intervals along the abutting plate 9. The bolt holes 15 are in the shape of a cross-shaped oval, and the fixed cone body 2 and the movable cone body 3 are fixed by the fastening bolt 16. The fastening bolt 16 is designed to be anti-loose, and the end is provided with a pin 17. The elbow plate 8 can strengthen the strength of the abutting plate 9 and improve the service life.

[0033] The application further comprises a lifting point 10 arranged on the movable cone body 3. The movable cone body 3 is hung by the lifting point 10, and the disassembly and installation of the movable cone body 3 are realized by using an inverted chain in cooperation with a floating crane.

[0034] The embodiments of the present embodiment are the preferred embodiments of the present utility model, not limited to the protection scope of the present utility model, so: all equivalent changes made according to the structure, shape, principle of the present utility model should be covered in the protection scope of the present utility model.

Claims

1. A detachable ice-pitoning resistance, characterized by: The utility model relates to a fixed cone (2) fixed in the inside of the jacket leg (4) and a movable cone (3) detachably connected to the outside of the jacket leg (4), the fixed cone (2) and the movable cone (3) both include a shell, a side sealing plate (11) is connected to the end face of the shell, a butt plate (9) is connected to the outside of the end face of the shell, the butt plate (9) of the fixed cone (2) and the movable cone (3) is connected through a fastening bolt (16), and the outside of the jacket leg (4) of one side of the movable cone (3) is further provided with an outer sealing plate (12) connected with the shell and the side sealing plate (11) of the movable cone (3) as a whole.

2. A detachable ice-protection according to claim 1, characterized in that: The shell includes an upper shell (5) and a lower shell (1), and the bottom edges of the upper shell (5) and the lower shell (1) are connected through a horizontal circular pipe ring (6).

3. A detachable ice-protection according to claim 1, characterized in that: A vertical circular pipe ring (7) is arranged at the connecting position of the shell, the butt plate (9) and the side sealing plate (11) of the fixed cone (2).

4. The detachable ice-protection according to claim 1, characterized in that: A plurality of reinforcing rib plates (13) are vertically arranged in the shell at equal intervals.

5. The detachable ice-protection according to claim 1, characterized in that: A reinforcing support plate (14) is horizontally arranged in the shell and located in the middle of the shell.

6. A detachable ice-protection according to claim 1, characterized in that: Elbow plates (8) are arranged on the butt plate (9) at equal intervals.

7. The detachable ice-protection according to claim 1, wherein: Bolt holes (15) are arranged on the butt plate (9) at equal intervals, and the fastening bolt (16) is arranged in the bolt holes (15) of the fixed cone (2) and the movable cone (3).

8. The detachable ice-protection according to claim 1, wherein: A lifting point (10) is arranged on the movable cone (3).

Images