JPS58191808A - Connecting device for marine structure and platform - Google Patents

Abstract

PURPOSE:To easily connect the legs of a platform with the struts of a marine structure in a short time by providing a guide piece with a vertical groove on the inside of an opening and a fixing piece of a circular form to be inserted into the vertical groove. CONSTITUTION:In the strut 3 of a marine structure 1, a vertical hole 33 to be fitted with the leg 5 of a platform 4 is provided at the center, and also an opening 32 provided on the side of the vertical hole 33 is provided on the upper part. Then, a guide piece 31 with vertical grooves 34 and 34a is provided in the inside of the opening 32, and a circular fixing piece 35 to be fitted into the vertical grooves 34 and 34a is also provided in the strut 3. By this, the connection of the legs 5 of the platform 4 and the strut 3 of the marine structure 1 can be easily attained in a short time without being affected by weather and oceanic conditions.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rig in oil offshore drilling equipment, which is formed by connecting a platform on which a drilling rig or the like is mounted to a structure installed on the seabed on the ocean.

More specifically, the present invention relates to a device for joining the structure and the platform.

For offshore drilling equipment, there is an artificial island method in which an island is constructed by building an embankment in the sea, and a defense is excavated in the same way as on land.A steel jacket is fixed to the seabed by piling, and this is used as a platform on which the drilling equipment is mounted. A structure constructed on the seabed by installing a drilling rig on a platform with a purge on the bottom, towing it to a predetermined location at sea, and then injecting seawater into the purge to allow it to settle. There is a moving bratform method that connects objects and platforms to form a rig and excavates a defense.

Among the above-mentioned methods, the mobile platform type rig has a base 2 installed on the seabed and supports 3ajb, 3, .
34 is erected to construct underwater structure 1, /(-a platform given buoyancy by Shiloh) is towed and positioned on top of this structure 1, and % water is injected into Purge@ to construct platform 4. is precipitated, and the leg lla with this π is set,
5b, 5c, 5d All 91l from above the structure 1, pillar 3&
~ 3 and 1 meet, leave barge 6, pull the platform reef to a predetermined position above the sea surface, and proceed to leg 5 & ~ 1ldK
It is fixed and the defense valve is excavated.

By the way, since the barge 6 is attached to the lower surface of the platform reef as described above, the ship platform foam may be shaken by waves etc., causing the legs 8a to 611 to be pushed from above the supports 3a to 3d. K-fitting is extremely difficult. Moreover, the legs 5a to 5d are the supports 3a to 34.
The legs 5 to 5d and the supports 3 to 3d may be damaged by the collision. This caused many problems, including delays in the construction period as the work had to be carried out on days with relatively few waves.

The present invention was made to solve the above-mentioned problems, and its purpose is to connect platform legs and supports of underwater structures without being affected by weather or sea conditions. The present invention provides a welding device that can easily perform welding in a short period of time.

In order to achieve the above-mentioned object, the device for joining an underwater structure and a platform according to the present invention tows a platform loaded with an oil drilling rig or the like to the top of the underwater structure, and connects the Gelabtoform K i & K 1 coreg to the underwater structure. In a rig connected to a support of a structure, the support of the underwater structure has a vertical hole in the center into which the leg is fitted, and an opening opening on a side surface of the vertical hole in the upper part. A guide piece having a vertical groove provided inside the opening, and an arc-shaped fixing piece that is inserted into the vertical groove after the leg is inserted into the vertical hole from the opening of the guide piece. It is something to do. The present invention will be explained below using the drawings.

Figure 2 shows an embodiment of the present invention, in which fat is a side view showing the main parts of the platform and legs, and fbl is a perspective view showing the main parts of the supports of the underwater structure. In both figures,
4 is a platform, 5 is a leg attached to the platform 4 so as to be movable up and down, and 6 is a barge. 3 is a support of the underwater structure 1, and a guide piece 31 is attached to the upper part. The lower part of this guide piece 31 is connected to the support 3
The upper part is formed into a C-shape with an opening 32 on one side, and a hole into which the leg 5 is inserted is provided in the center. ing. The guide piece 34 is an arc-shaped fixing piece that matches the outer diameter of the leg 5, and has a groove 34 extending from the top of the guide piece 31 in the length direction. It is configured so that it can fit into the aaa. In addition, guide piece 3
1 is attached to each pillar 3 &~3diC, each opening 3
2 are both oriented in the same direction.

Struts 31-3d and legs 5&-1 made from #5 as above
The order of joining 511 is as follows.

(凰) Tow the platform built at the shipyard to the top of the underwater structure 1, and as shown in Figure 3, each leg 5a
-5- to the guide pieces 31a to 31 of each support 3a to 3d.
- Stop at a position facing the opening depth.

At this time, each of the legs 51 to 5d is fixed to the gelatin foam 4 while protruding a predetermined length into the sea.

(Inject seawater into the barge and lower the platform reef, so that the lower ends of legs 5 &~5d are connected to guide pieces 31a~
When the gelabut foam 4 reaches a position slightly above the lower end of the opening 32 (indicated by a broken line), the lowering of the gelabut foam 4 is stopped.

4al In this state, if the platform 4 is towed quietly to the left in the figure, each leg 5 ~ 11d will be moved to each guide 31 ~
11- is fitted into the hole 33 from the opening introduction. At this point, even if the legs 11&~5d collide with the guides 31a~314K, the intelligent impact force is absorbed by the guides 31a~31dK, and there is no risk of damaging the legs or guides.

(4) Next, by fitting the grooves 34°3aa K fixed piece holes provided in the openings of each guide 31 &~314, each leg 5
a to 5d are accommodated in the holes of guides 31a to mld. This cutting state is shown in FIG. Note that the legs 5 and 5 are lowered as necessary to ensure more secure fitting with the guides 31a to 31d.

After the connection between the +6 Ruda 5m-84 and the supports 3a to 3d is completed, the legs are unfastened from the platform reef,
The seawater in barge 6 is discharged and the platform reef is raised to a predetermined height above the sea surface, and the galley and toform reef are raised again on leg 5. -Secure the barge to the ship and remove the barge if necessary. Note that the platform 4 may be raised by a lifting means included in the platform 4.

In the above explanation, an example of the joining order of the underwater structure and the legs is shown, but it goes without saying that the present invention is not limited to this and may be changed as appropriate depending on the situation. Also, the structures of the guide piece and the fixed piece are not limited to the embodiments, and can be modified as appropriate without departing from the gist of the present invention.

As is clear from the above description, the present invention allows the rig to be assembled by easily joining the legs of the bra and toform to the supports of the underwater structure in a short time and without being affected by weather or sea conditions. Since it is possible to configure the structure, and there is no risk of damaging them, it is highly effective when implemented.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of a rig for explaining the present invention, Figure 2 is an embodiment of the present invention, 111 is a side view showing the main parts of the plyform and leg, and Figure 1) is underwater. Figure 3 is a perspective view showing the main parts of the support of the structure, Figure 3 is a front view showing the state before the underwater structure and platform are connected, and Figure 4 is a cross-sectional view showing the state where the guide piece and leg are connected. be. 1: Undersea structure, 3: Strut, 31 guide piece, 32
: opening, 33: hole, 34.34a : vertical groove, 35:
Fixed heath, 4 nibratuforms, 5; leg, 6; barge. Agent Patent Attorney Saburo Dokimura

Claims (1)

[Scope of Claims] A rig comprising a platform loaded with an oil drilling rig, etc., towed to the top of an underwater structure, and a leg provided on the platform is connected to a support of the underwater structure, comprising: A guide piece in which the post has a vertical hole in the center into which the leg is fitted, an opening opening the side surface of the vertical hole in the upper part, and a vertical groove inside the opening, and a guide piece in which the leg is fitted. A device for joining an underwater structure and a gelabut foam, characterized in that an arc-shaped fixing piece is provided which is inserted into the vertical groove after being inserted into the vertical hole through the opening of the guide piece.