JPH02147790A - Stowage of riser pipe for oil drilling, etc. - Google Patents

Abstract

PURPOSE:To save man power and time at the time of transference and storage by installing such a caisson as making plural numbers of a riser pipe vertically stowable, and supporting the upper and lower sides by each guide throughout the transference and storage of these riser pipes. CONSTITUTION:There is provided with such a caisson as making plural riser pipes R vertically stowable. Next, at time of storage, the upper and lower sides of each riser pipe R are transferred to a specified position as having them guided by an upper guide 12 and a lower guide 13, then they are lowered. Then, even at time of descending, they are guided by the lower guide 13, positioning them at a regular position, and are set up on each riser seat 4. Successively, even during storage, the upper and lower sides are supported by respective guides 12, 13, and thereby they are made so as not to be moved even if a hull is rocked. In addition, at time of the takeout, the upper and lower sides are guided by these guides 12, 13 and then taken out after being transferred to a specified conveyor port.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention is used to store riser pipes in equipment that has a caisson or a column, and is transported over the sea to a predetermined location where it is used for oil drilling or oil production. Regarding equipment.

"Prior Art" For example, when storing riser pipes (hereinafter simply referred to as risers) used for seabed drilling on an oil drilling ship, conventionally, as shown in Fig. 1θ and Fig.
A method of storing a plurality of risers R horizontally in multiple stages by stacking riser racks 2 and risers R alternately on top has been explored.

[Problems to be Solved by the Invention] However, the above storage method requires a large space on the deck l for storing the riser. ■It is necessary to attach or remove the riser rack 2 when loading or unloading the riser R.

(2) When stacking risers R, it is necessary to accurately position the lower riser R so that their ends overlap, and storing and transporting the risers R requires manpower and time. ■
Retracting the riser when the ship is rocking is dangerous. ■Since the risers were stacked on the deck, there were problems such as the ship's center of gravity becoming high and the ship's stability becoming worse.

SUMMARY OF THE INVENTION An object of the present invention is to provide a riser storage device for oil drilling or production equipment that can solve the above-mentioned problems.

"Means for Solving the Problems" A riser storage device according to the present invention includes a frame for vertically storing a plurality of riser pipes, and a live pipe transfer path provided on both sides of the upper part of the live pipe transfer path in the frame. an upper guide that guides the upper part of the riser pipe being transferred as it is and supports the upper part of the riser pipe when the riser pipe is in the stored state; The riser pipe is characterized by comprising a lower guide that guides the lower part of the live pipe and supports the lower part of the live pipe when the riser pipe is in the stored state, and a riser sheet that supports the lower surface of the riser pipe when the riser pipe is in the stored state.

``Operation'' During storage, the riser is transported to a predetermined location while being guided by guides up and down, and is lowered there.

In addition, since the lower end of the riser is guided by the lower guide even when descending, the riser is positioned at a proper position and placed on the riser sheet. In this stored state, 1. The riser has an upper end supported by an upper guide and a lower end supported by a lower guide, so that it does not shift from the stowed position even when the ship body rocks.

After this, when taking out the riser, the live is once pulled up, the upper end and the lower end are guided by the upper guide and the lower guide, and the live is transported to a predetermined transport port.
It is taken from there.

"Embodiment" Hereinafter, an embodiment of the riser storage device according to the present invention will be described with reference to FIGS. 1 to 9.

FIG. 1 is a plan view of the storage device, and FIG. 2 is a cross-sectional view taken along line -n in FIG. 1.

The illustrated storage device shows an example in which the present invention is applied to an oil drilling ship. Inside a caisson (frame body) 11 having a riser transport port 10 and a riser mounting port 23, there are an upper guide 12, a lower guide 13, a riser sheet 14, a pillar 15, a pillar support beam 16, and a pillar support beam operation scaffold 17, respectively. It has a ready configuration.

The caisson 11 is formed into a ring shape by an outer wall 20, an inner wall 21, and a bottom part 22, and has a plurality of risers R inside.
are stored vertically in two rows.

The upper guides 12 are provided on both sides of the upper part of the riser transfer path in the caisson 11, and the riser R is transferred while being placed vertically.
and supports the upper part of the riser R when the riser R is in the retracted state. Specifically, the second
As shown in the figure, a central guide 12a and an end guide 12b,
12c. A transfer guide 12d is attached to the upper part of the members 12a to 12c constituting the upper guide 12, and a support pad 12e is attached to the lower part. The transfer guide 12d guides the upper large diameter portion R1 of the riser R during transfer, and the support pad 12e comes into contact with the side wall of the upper large diameter portion of the riser R during storage, causing the riser R to fall back and forth and left and right. This is to prevent

The support pad 12e has an upper guide 12a-+2 for the - riser R so that the riser R can be supported at four points in the circumferential direction.
Two pieces are provided at intervals for each c.

In addition, the upper guide 12x below the riser mounting port 23 is provided with a pin 12y as shown in FIG.
It is hinged so that it can swing around the center. Further, this upper guide 12 is provided with a structure so that it can support the upper large diameter portion R1 of the riser R that has been previously mounted or placed below it when the upper guide 12 is tilted down to a horizontal state around the pin 12y.
It has an arcuate inner surface 12z that is open on the - side.

The lower guides 13 are provided on both sides of the lower part of the riser transfer path to guide the lower part of the riser R during transfer and to support the lower part of the riser R when the riser R is in the stored state. As shown in FIGS. 2 and 5, it is composed of a center guide 13a, end guides 13b and 13c, and an inter-riser guide 13d. Central guide 1
3a and the end guides 13b and 13c, a transfer guide 13e is attached to the side thereof, and a riser storage guide 13f is attached to the lower part thereof, respectively. The inter-riser guides 13d mainly restrict the movement of the lower ends of the four stored risers R in the transport direction, and are arranged at intervals in the circumferential direction of four risers R each. The transfer guide 13e is for guiding the lower end large diameter portion R2 of the riser during transfer, and the riser storage guide 13r is for positioning the riser by coming into contact with the lower end of the rising riser R during storage. be. Note that the guide between risers 13d
The upper inclined surface 13d+ also positions the riser R that is lowered during storage.

As shown in FIG. 6, the riser sheet 14 is composed of a support 14a that supports the riser, and a rubber sheet 14b laid on the top surface of the support 14a.

The pillar 15 receives the vertical load of the central upper guide 12a.

The pillar support beam 16 supports the pillar 15 from left and right sides as shown in FIGS. 7 and 8, and extends the pillar 15 between the outer wall 20 and inner wall 21 of the caisson in order to secure riser storage space on both sides. It is placed in the center. This pillar support beam 16 is a column 15 that is an extension of the pillar 15.
Left and right support beams 16b and 16c are rotatably attached to a. The tips of the support beams 16b, 16c are fixed by stoppers 16d attached to both end guides 12b, 12c and the center guide 12a. In addition, the left and right support beams! 6b,
16c is designed so that it cannot be rotated and removed at the same time in order to increase the safety of pillar support.

Moreover, as shown in FIG. 8, a handrail 16e may be provided on the upper part of the support beams 16b, 16c, if necessary for work safety.

The pillar support beam operation scaffold 17 is arranged adjacent to the pillar support beam 16, as shown in FIGS. 7 and 9, and can be stored at the base end 17a and above the base end. A pin 17c is formed on the passage 24 provided inside the upper guide 12b, and the proximal end 17a is inserted into the passage 24 provided inside the upper guide 12b.
It is configured to be rotatably attached via the.

When this scaffold I7 is laid down to a horizontal state and the tip slide portion 17b is extended, it straddles the left and right rain upper guides 12b and 12c.

Next, the case where the riser R is stored in the storage device described above will be explained.

To store the riser R, the riser R is first lifted up with a crane or the like and inserted into the caisson 11 through the riser mounting port 23. At that time, keep the upper guide 12x upright,
When the riser R has been inserted, it is folded horizontally as shown in FIG. By tilting the upper guide 12x in this way and fitting it into the large diameter portion R at the upper end of the riser R, the inserted riser R is temporarily supported so that it does not fall back and forth and left and right.

With the riser R temporarily supported as described above, the locking parts such as the crane are removed from the riser R, and then the ceiling rail moves along the riser storage section in the caisson, which is specially provided for this storage device. After insertion, the riser R is supported again by a lifting jig of a lane (not shown).

Next, the upper guide 12x is erected to release the temporary support to the riser R, and the overhead running lane is operated to lift the locked riser R and transport it to a predetermined storage location.

When transporting the riser R, the pillar support beam 16 and the pillar support beam operation scaffold 17 which are the transport path for the riser R
can be removed at any time. The pillar support beam 16 is removed from the scaffolding 1.
7 to engage and disengage the stopper 16d and support beam 16
b (16c) itself, and removal of the pillar support beam manipulation scaffold 17 is performed by sliding the distal end portion 17a and rotating the proximal end portion 17a. After passing through the riser R, the pillar support beam 16 and the operation scaffold 17 are passed between the guides 12b and 12c at both ends so as to cross the transfer path of the riser R again by the reverse procedure described above.

Incidentally, the operation of raising and tilting the pillar support beam 16 may be performed by remote control. In this case, the pillar support beam operation scaffold 17 becomes unnecessary.

When transferring the riser R, the strong upper end large diameter portion R1 and lower end large diameter portion R6 of the riser R are moved by the transfer guide 12d of the upper guide 12 and the transfer guide 13e of the lower guide 13, respectively, as shown in FIG. Therefore, the riser R can be smoothly transferred.

The riser R that has been transferred to the predetermined storage position is then lowered, and at this time, the lower end large diameter portion R2 is guided by the inter-riser guide 13d of the lower guide 13 and the riser storage guide 13r to accurately position it at the predetermined position. Then, it is lowered and is seated on the riser seat +4b. Note that the seat 14b has the function of alleviating the shock when sitting, and the function of improving the seating comfort so that the riser R in the retracted state does not easily shift back and forth and left and right.

The riser R is stored as described above, and in this stored state, the riser R is supported at its upper end by the support parapet 12e, and at the same time its lower end is supported by the inter-riser guide 13d and the riser storage guide 13''. Do not allow it to shift forward, backward, left or right, or fall over.

Moreover, when the riser R in the storage position is to be taken out, it can be taken out by performing the above-described procedure in reverse.

Further, when using the riser R in the storage position, the riser R can be moved between the storage position and the riser transport device I (not shown) below the riser transport port 10 using the same procedure.

In the above embodiment, the caisson 11 having two rows of riser storage spaces arranged in a ring shape has been described as an example, but the invention is not necessarily limited to this embodiment. Even if there is no, or 3
Of course, it is also applicable to those having riser storage spaces of more than one row. In addition, when there is only one row of riser storage spaces, if the upper guide is supported by the side wall of the caisson 11, the pillar 15 or the pillar support beam 16 becomes unnecessary.

"Effect of the invention" According to the present invention, there are the following excellent effects.

■The riser can be stored vertically in any position such as below the deck, so there is no need to secure a large riser storage space on the deck.

If the riser is stored in a horizontal position, the riser must be repositioned so that it is vertical, and then the risers must be connected together. However, in the case of the present invention, the riser is stored vertically from the beginning, so the riser There is no need to reposition, and the process of connecting risers is reduced.

■The conventional work of stacking riser racks on the deck or riser, or removing stacked live racks, is no longer required. Since there is no need to operate the riser rack in this way, the manpower and time required to store and transport the risers can be significantly reduced.

■The riser storage location can be secured at any location within the hull, and if it is located low within the hull, the center of gravity of the hull will be lowered, increasing stability, and ultimately increasing the carrying capacity. This means that
This is particularly advantageous in the case of floating structures that are transported to a predetermined location but are not fixed there.

■Since the riser is placed vertically and the upper and lower parts of the riser are supported by upper and lower guides during transport to storage, the riser storage work can proceed safely even when the ship is rocking.

[Brief explanation of the drawing]

1 to 9 show an embodiment of the riser pipe storage device according to the present invention, FIG. 1 is a plan view of the device, FIG. 2 is a view taken along the line ■-■ in FIG. 1, and FIG. The figure is III-II in Figure 2.
I-line arrow view, Figure 4 is a detailed view of the riser transport port, Figure 5 is a ■-V line arrow view in Figure 2, Figure 6 is vt-vt in Figure 5.
Figure 7 is a detailed view of the inside of Figure 1, Figure 8 is a view of Figure 7 as seen from the ■-■ line, Figure 9 is IX-I in Figure 7.
The X-ray arrow view, FIG. 1O, and FIG. 11 show conventional examples,
FIG. 1O is a side view, and FIG. 11 is a sectional view. lO... Riser transport port, 11... Caisson (frame body), 12 (12a= l 2 c) ---
- Upper guide, 13 (13a-13d) Lower kite, 1
4... Riser sheet, 15... Pillar 16... Pillar support beam, 17... Pillar support beam operation scaffolding, 23... Riser mounting port, R...Riser pipe. Ishikawajima-Harima Heavy Industries Co., Ltd. = 1 Figure 5 Figure 6 Figure iQ Σ l'' Figure 11

Claims (1)

[Claims] A frame for vertically storing multiple riser pipes, and a frame provided on both sides of the upper part of the riser pipe transfer path inside the frame to guide the upper part of the riser pipes that are transferred while vertically, and to keep the riser pipes in the stored state. an upper guide that supports the upper part of the riser pipe when the riser pipe is in storage; 1. A storage device for riser pipes for oil drilling, etc., comprising: a lower guide supporting the lower part of the pipe; and a riser sheet supporting the lower surface of the riser pipe in a stored state.