JPS5982231A - Shipping method of jacket structure - Google Patents

Abstract

PURPOSE:To make a jacket structure in a framework consisting of plural legs and braces stowable on a ship in a state of standing erect without deforming the jacket structure due to a wire touch on these braces, in case of drilling rigs and installations for oil field development. CONSTITUTION:In the case where a jacket structure 1 consisting of plural pieces of legs 2 and also plural braces 3 connecting each interval between these legs 2 is loaded on a ship, first of all, a wire 4 out of a jig 6a of a floating crane 6 is attached to a specified spot inclusive of a ground contact part of a tip in the structure 1 being laid down, and a sling beam 5 installed in the midway of the wire 4 is made contact with the top of a lever 2 in a corner part of the tip of the structure 1. Then, the structure 1 is hoisted by the crane 6, making the structure 1 stand upright. At this time, the load imposed on the wire 4 is turned to the axial direction of each leg 2 via the sling beam 5, thus avoiding the deformation of each brace 3. Afterward, the structure 1 is shipped in a state of being left upright intact by means of the crane 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the method of shipping jacketed structures.

For example, in drilling equipment for oil field development that is fixed to the seabed, a jacket structure is used, which is basically a frame structure consisting of multiple legs (main pillars) and multiple places (pillars) that connect the legs. is used. Such a socket structure is, for example, 100 to 10' OOt
It has a weight of approximately 20 to 50 meters and has a height of approximately 20 to 50 meters when in actual use. For ease of assembly, such a jacket structure is assembled horizontally, and then transferred onto a ship using a winch or the like in that state.

However, when the jacket structure is loaded horizontally in this way, the jacket structure 1 on the ship
The occupied area ratio per unit is large. Therefore, the loading efficiency of the jacket structure for one ship is poor. Furthermore, loading operations using winches and the like are inefficient.

Therefore, this invention was made in order to eliminate the above-mentioned gaps, and includes a plurality of legs whose length directions are parallel to the center line and a plurality of places for connecting the plurality of legs. Attach a plurality of wires from a floating crane to predetermined locations including a grounded portion at the tip of a horizontally placed jacket structure, and then lift the jacket structure by the floating crane,
The jacket structure comprises the steps of erecting the jacket structure so that its base end is facing downward, and then placing the glossy structure on a ship in the erected state using the floating crane. When lifting or standing up an object, the tip of the leg is attached to a part of the wire attached to the grounded part of the tip of the jacket structure, which corresponds to a part of the corner of the tip of the jacket structure. This method is characterized by a method of shipping a jacket structure in which a receiving member is interposed for contacting the jacket structure.

The present invention will be explained below with reference to the drawings.

FIG. 1 is a schematic perspective view of a jacket structure placed horizontally near a quay, and as shown in the figure, the jacket structure 1
is basically composed of eight legs 2 and a plurality of places 3 for connecting the legs 2.

As shown in FIGS. 2 and 3, 6 is a floating crane, and a knob 6a of the floating crane 6
The wire 4 from above is placed at a predetermined location including one end 1a of the grounding portion of the jacket structure 1. A hanging beam 5 serving as a receiving part is provided in the middle of the wire 4 attached to one end 1a of the grounding part of the socket structure 1.

Five hanging beams are positioned to contact the tips of the legs 2 at a portion of the corners of the tips of the jacket structure 1. The hanging beam 5 is composed of two parts 5b, both sides of which are rotatable relative to each other, with the central part 5a as a fulcrum.

Since the hanging beam 5 has such a structure, a load is equally applied to each of the two wires 4 fixed to each part 5b.

With the above configuration, the jacket structure 1 placed horizontally near the quay is loaded onto a ship in the following manner. That is, first, the wire 4 made of the knob 6a of the floating crane 6 is attached to a predetermined location including the grounding part of the tip of the jacket structure 1 placed horizontally, and the hanging beam 5 is attached to a part of the corner of the tip of the jacket structure 1. on top of the tip of leg 2 at. Next, as shown in FIG. 3, the jacket structure 1 is hoisted up by the floating crane 6, and the jacket structure 1 is erected so that its base end is facing down. At this time, the wire 4 attached to the grounding portion at the tip of the jacket structure 1 does not hit the place 3 at the tip of the jacket structure 1, and the hanging beam 5 is connected to the ground portion at the tip of the jacket structure 1. Press it against the tip of leg 2 at a part of the corner. As a result, the load applied to the wire 4 is directed in the axial direction of the leg 2 via the suspension beam 5, so that the load applied to the wire 4 is not applied to the place 3, and the place 3 is deformed. do not.

Next, the floating crane 6 places the erected tow jacket structure onto a ship (-J' shown in the figure). Therefore, the loading efficiency of the jacket structure 1 onto the ship is good.

As explained above, according to the present invention, it is possible to achieve extremely high work efficiency and to safely ship jacket structures without damaging the place.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a schematic perspective view of a jacket structure, Fig. 2 is a front view of a main part of a floating crane, and Fig. 3 is a side view of a main part of the floating crane. In the drawings, 1... Soyacket structure 2... Leg 3... Place 4... Wire 5... Hanging beam 6... Floating crane Applicant Natsuo Shioya, agent of Nippon Kokan Co., Ltd. 2 others)

Claims (1)

[Claims] Grounding at the tip of a horizontally placed jacket structure having a plurality of legs having a longitudinal direction parallel to a center line and a plurality of places connecting the plurality of legs. Attach a plurality of wires from a floating crane to a predetermined location including the part, and then lift the jacket structure by the floating crane,
The jacket structure is erected so that its base end is at the bottom, and then the floating crane lifts the jacket structure to its erected state. However, during the process of placing the relics on board the ship, when the jacket structure was lifted and erected, the wire attached to the grounded part at the tip of the jacket structure was removed in the middle. A method for shipping a jacket structure, characterized in that a receiving part for contacting the tip of the leg is provided at a portion corresponding to a corner of the tip of the jacket structure.