KR20100004898A - Foldable derrick structure for a ship - Google Patents

Abstract

PURPOSE: A foldable derrick structure for a ship is provided to allow for the ship to pass the route with air draft limit quickly by folding the derrick. CONSTITUTION: A derrick includes an upper derrick element(12), a lower derrick element(11), and a hinge unit(20) which couples the upper derrick element to rotate with respect to the lower derrick element fixed to the ship. A wire(50) is connected to one side of the upper derrick element and rolled by winches(41,42) to provide driving power to the upper derrick element.

Description

Foldable derrick structure for a ship}

The present invention relates to a foldable derrick structure for ships, and more particularly foldable derrick structure for ships to easily reduce the height by folding the derrick so that ships such as drilling ships with a derrick can pass through the course subject to the maximum height restrictions It is about.

In general, a drilling vessel is a general term for a vessel that explores and drills marine underground resources such as oil and gas, and includes a fixed platform, a semi-submersible drilling vessel, and a drillship. On these ships, a large, complex structure of derricks consisting of a beam and various drilling rigs is fixed to the deck. Derrick is short for derrick crane.

This derrick is a tower that is installed near the moon pool on the drilling rig, where all the drilling equipment is concentrated. In addition, the derrick is for elevating drilling equipment, such as a drill pipe, by winding or unwinding the wire rope connected to the drilling equipment by the operation of the winch, thereby elevating the drilling equipment to the desired position. Drilling ships use one derrick and two derricks.

On drilling ships, derricks are large structures that are usually over 100 meters tall. When a drilling ship passes airways subject to air draft limits, such as the Centennial Bridge across the Panama Canal, the Murabask Peacebridge across the Suez Canal, and the Bosphorus Strait Bridge, Derrick passes due to its height. There are cases where this is impossible. For the passage of the drilling ship, it is necessary to dismantle the derrick of complex structure, and it is practically difficult to dismantle the fixed derrick on the deck, and in particular, it is impossible to separate the welded parts and lower the height to a certain level even if the dismantling is possible. It is difficult, and this leads to excessive time and money for the move.

In addition, since the height of the derrick is more than 100m, the derrick installed on the drilling ship increases the center of gravity (COG) during the voyage of the ship, which is a factor that hinders the floating stability.

This problem is equally applicable to ships equipped with derricks as well as drilling ships.

Therefore, the present invention has been invented in view of the above circumstances, and by constructing the derrick in a foldable manner, it is possible to allow passage in a route to which the maximum height restriction is applied, such as a canal, and thus, it is possible to reduce the time and cost required for ship operation. The purpose is to provide a derrick structure for the vessel.

The foldable derrick structure for ships according to one aspect of the present invention includes: a derrick including an upper derrick element, a lower derrick element, and a hinge coupling portion rotatably coupling the upper derrick element to the lower derrick element; A drive unit for transmitting a driving force so that the upper derrick element can be rotated and folded with respect to the lower derrick element; Wherein the upper derrick element is configured to fold and rotate about the lower derrick element while the lower derrick element is fixedly supported on the vessel.

In addition, the driving unit is disposed on both sides of the derrick, characterized in that consisting of a plurality of rotary drive unit for transmitting a driving force so that the upper derrick element can be rotated and folded relative to the lower derrick element.

In addition, the hinge coupling portion is installed on both sides of the upper derrick element, it is characterized in that the detachable coupling with the lower derrick element.

In addition, the upper derrick element is composed of a first derrick element and a second derrick element divided vertically, the first derrick element and the second derrick element is characterized in that it is configured to be folded and rotated in opposite directions, respectively. .

In addition, the first derrick element and the second derrick element, each hinge coupling portion rotatably coupled to the lower derrick element; A fastening portion fixedly secured to said lower derrick element; It includes, wherein the first derrick element and the second derrick element is characterized in that it is configured to fold and rotate in opposite directions with respect to the hinge coupling portion after separating the fastening portion, respectively.

Further, it characterized in that it further comprises a support for supporting the rotated upper derrick element.

In addition, the support is characterized in that the removable installation on the lower derrick element.

The rotary drive unit may further include: a wire connected to the upper derrick element; A winch winding the wire to transmit a driving force to the upper derrick element; The winch is characterized in that the wire is released while maintaining the tension in order to prevent the sudden rotation of the upper derrick element when the upper derrick element rotates in the direction opposite to the winding direction of the wire.

In addition, the height of the lower derrick element is characterized in that the height level of the highest structure except the derrick in the vessel.

The foldable derrick structure for ships according to another aspect of the present invention is characterized in that the derrick consists of an upper derrick element and a lower derrick element, and the upper derrick element is coupled to the lower derrick element to be foldable with respect to the lower derrick element. It is done.

In addition, the upper derrick element is composed of a first derrick element and a second derrick element divided vertically, the first derrick element and the second derrick element is characterized in that it is configured to be folded and rotated in opposite directions, respectively. .

According to the present invention, by constructing a derrick of a ship, such as a drilling ship, by folding, the ship is subject to the maximum height restrictions such as Centennial Bridge across the Panama Canal, Murabask Peacebridge across the Suez Canal, Bosphorus Strait Bridge, etc. By allowing the passage of the route, the time and cost of the vessel operation can be reduced. In addition, it is possible to fold the derrick during sailing of the ship to lower the center of gravity of the ship can be improved floating stability.

Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Here, in adding reference numerals to the elements of each drawing, it should be noted that the same elements are denoted by the same reference numerals as much as possible even if they are shown in different drawings.

1a to 1f is a view sequentially showing a process of folding the derrick in the foldable derrick structure for ships according to the present invention. Figures 2a to 2f is a view sequentially showing a process of setting up a folded fold derrick structure for a ship according to the invention in its original state.

In general, a derrick is a kind of tower installed on a drill floor (2) on a vessel, for example, a drilling ship, in which all drilling equipment is concentrated, and has a configuration for lifting drilling equipment such as a drill pipe.

Referring to FIG. 1A, the derrick of the present invention consists of two parts, an upper derrick element 12a, 12b; 12 and a lower derrick element 11, the upper derrick element 12 being connected to the lower derrick element 11. It is configured to be foldable.

The upper derrick element 12 is coupled to the lower derrick element 11 by the hinge coupling portion 20 and the fastening portion 21, such as a drill pipe by the lifting means installed on the top of the derrick when drilling Can be advanced to the seabed. The hinge coupling portion 20 is installed on both sides of the upper derrick element 12, it is preferable to be detachably coupled to the lower derrick element (11).

In the present invention, the upper derrick element 12 consists of a vertically divided left derrick element 12a (or a first derrick element) and a right derrick element 12b (or a second derrick element). After removing the part 21, the hinge coupling part 20 may be folded and rotated in opposite directions, respectively.

The upper derrick element is rotated relative to the lower derrick element 11 about the hinge coupling 20. The hinge coupling portion 20 is a hinged coupling portion provided at the connection portion of the upper derrick element 12 and the lower derrick element 11 so that the upper derrick element 12 can be folded, and the upper derrick element 12 ) Serves as a support when folded or erected.

In view of the fact that the derrick is manufactured three-dimensionally by a plurality of frames, the hinge coupling portion 20 is connected to the upper derrick element 12 and the lower derrick element 11 in a direction in which the upper derrick element 12 is rotated. All of the frames are installed at the point.

On both sides of the derrick are located driving portions which transmit a driving force so that the upper derrick element 12 can be rotated and folded about the lower derrick element 11, respectively. As the driving unit, various actuators such as a hydraulic cylinder may be used.

In this embodiment, the driving unit may be composed of a plurality of rotational driving units which are respectively disposed on both sides of the derrick to transfer the driving force. The rotary drive unit includes a wire 50 connected to one side of the upper derrick element 12, and winches 41 and 42 winding the wire 50 to transmit a driving force to the upper derrick element 12. (See FIG. 1C). The winches 41 and 42 are preferably installed on both sides of the derrick in a number sufficient to transmit the driving force necessary for the upper derrick element 12 to safely rotate. In addition, the position of the winches 41 and 42 and the method of transmitting the driving force can also be freely selected by those skilled in the art.

The height of the lower derrick element 11 is preferably the height level of the highest structure excluding the derrick from the drilling line. This reduces the length and weight of the upper derrick element 12 as much as possible, thereby making the folding work stable.

On the other hand, as a vessel for installing the foldable derrick structure for ships according to the present invention, not only drilling ships such as drill ships, semi-submersible drilling ships, but also all ships having a derrick, such as cargo ships, can be moved further. This includes marine structures.

Hereinafter, the process of folding the upper derrick element in the foldable derrick structure for ships according to the present invention will be described.

Referring to FIG. 1A, when using a derrick for drilling on a ship, for example a drilling vessel, the upper derrick element 12 and the lower derrick element 11 are connected by a hinge coupling 20 and a fastening portion 21. To keep the derrick in an upright position. Therefore, the drilling operation such as the drill pipe using the derrick by the elevating means to be able to proceed with the drilling operation.

Referring to FIG. 1B, before folding the upper derrick element 12, a support 30 for supporting the rotated upper derrick element 12 is installed. The support 30 may be fixedly or detachably installed on the surface of the deck 1 or the like.

In this embodiment, the support 30 is detachably installed on both sides of the lower derrick element 11. This is preferable because the position where the support 30 is installed is spaced upward from the deck 1 or the drill floor 2 so that no interference with other superstructures occurs.

Referring to FIG. 1C, in order to fold the upper derrick element 12, the left derrick element 12a first detaches the fastening portion 21 fastened to the lower derrick element 11. Next, the wire 50 connected with the first winch 41 is connected to the upper part of the left derrick element 12a, and the wire 50 connected with the second winch 42 is connected to the lower part of the left derrick element 12a. Connect. The connection method and location of the wire can be freely selected by those skilled in the art. Next, the wire 50 connected to the first winch 41 is wound to rotate the left derrick element 12a about the hinge coupler 20. At this time, the second winch 42 applies a tension force so that the wire 50 connected thereto is released while maintaining tension, so that the left derrick element 12a can be stably rotated.

Referring to FIG. 1D, the left derrick element 12a is fully folded and supported above the support 30.

Referring to FIG. 1E, in order to fold the right derrick element 12b, the right derrick element 12b separates the fastening portion 21 connected to the lower derrick element 11. Next, the wire 50 connected with the second winch 42 is connected to the upper part of the right derrick element 12b, and the wire 50 connected with the first winch 41 is the lower part of the right derrick element 12b. Connect to Next, the wire 50 connected to the second winch 42 is wound to rotate the right derrick element 12b about the hinge coupler 20. At this time, the first winch 41 is applied to the tension force so that the wire 50 connected thereto is released while maintaining the tension, so that the right derrick element 12b can be stably rotated.

Referring to FIG. 1F, the left derrick element 12a and the right derrick element 12b are fully folded and supported on the support 30, so that the folding operation of the upper derrick element 12 is completed.

Hereinafter, the process of setting the folded upper derrick element according to the present invention to the original state.

Referring to FIG. 2A, the left derrick element 12a and the right derrick element 12b are fully folded and supported on the support 30.

Referring to FIG. 2B, in order to set the left derrick element 12a to its original state, the wire 50 connected to the second winch 42 may be wound to raise the left derrick element 12a with respect to the hinge coupler 20. Rotate in the direction. At this time, the wire 50 connected to the first winch 41 is also connected to one side of the left derrick element 12a so as to stably set up the derrick.

Referring to FIG. 2C, the left derrick element 12a is fully erected to engage the lower derrick element 11 at the fastening portion 21.

Referring to FIG. 2D, in order to erect the right derrick element 12b, the wire 50 connected to the first winch 41 may be wound to raise the right derrick element 12b with respect to the hinge coupler 20. Rotate in the direction. At this time, the wire 50 connected to the second winch 42 is also connected to one side of the right derrick element 12b so as to stably set up the derrick.

Referring to FIG. 2E, the right derrick element 12b is also fully erected to engage the lower derrick element 11 at the fastening portion 21. The wire 50 connected to the first and second winches 41, 42 is also removed.

Referring to FIG. 2F, the support 30 installed on the lower derrick element 11 is removed, thereby completing the work of raising the folded upper derrick element 12.

After the left derrick element 12a and the right derrick element 12b are erected, it is preferable to connect the center portion thereof in a longitudinal direction by means of separate fastening means so that the derrick is stably supported.

Figure 3 is a view showing another embodiment of folding the derrick in the foldable derrick structure for ships according to the present invention.

In the present embodiment, the entire left derrick element 12a and the right derrick element 12b are folded around the hinge coupler 20 of the right derrick element 12b. To this end, both the hinge coupling portion 20 and the middle coupling portion 21 of the left derrick element 12a must be separated.

In this case, the support 30 is installed only on the side where the upper derrick element 12 is folded.

In this embodiment, the folding operation of the upper derrick element 12 is made simpler, so that the quick folding is made.

As described above, when the rig operates a route with maximum height limitations such as Centennial Bridge across the Panama Canal, Murabask Peacebridge across the Suez Canal, Bosphorus Strait Bridge, etc., the upper derrick element 12 ) By folding the lower derrick element 11, it is possible to reduce the time and cost required to operate the ship.

In addition, since only the upper derrick element is folded and rotated with respect to the lower derrick element in the state where the lower derrick element is fixedly supported on the vessel, the folding portion is reduced and the folding operation can be made simple, quick and stable.

In addition, in the present invention, the derrick is composed of the upper derrick element 12 and the lower derrick element 11, and only the upper derrick element 12, which is the upper end of the derrick, is folded so that the conduction moment is not the base portion of the derrick that takes the most moment. Folding in the middle part takes place. This eliminates the possibility that the ship is inverted during the folding of the derrick and makes the folding work of the derrick stable.

In addition, since only the upper derrick element 12 is folded and the lower derrick element 11 is not folded, safe support is possible by the lower derrick element 11 which is not separated.

In addition, even when the vessel is sailed before and after the drilling operation, the upper derrick element 12 is folded and operated with respect to the lower derrick element 11, thereby lowering the center of gravity of the vessel and improving floating stability. This allows for safe and quick navigation.

Further, in the present invention, the upper derrick element 12 is vertically separated into the left derrick element 12a and the right derrick element 12b, and the left derrick element 12a and the right derrick element 12b are respectively opposite directions. It is folded. Therefore, the power owned by the folding work can be reduced to 1/2, so that a relatively safe work is possible.

In addition, the folding work does not need a separate power in addition to the winch (41, 42), there is an advantage that the folding work of the derrick can be made only with a minimum of fixed equipment (for example, the support).

In addition, the storage location of the folded upper derrick element 12 is also located in the empty space above the vertical extension of the deck 1, there is an advantage that can be stored without interference with other superstructures.

It will be apparent to those skilled in the art that the present invention is not limited to the above embodiments and can be practiced in various ways without departing from the technical spirit of the present invention. will be.

Figures 1a to 1f sequentially showing the process of folding the upper derrick element in the foldable derrick structure for ships according to the present invention.

Figures 2a to 2f sequentially illustrate the process of erecting the folded upper derrick element according to the present invention.

Figure 3 is a view showing another embodiment of folding the derrick in the foldable derrick structure for ships according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1: Deck

2: drill floor

11: lower derrick element

12: upper derrick element

12a: left derrick element

12b: Right derrick element

20: hinge coupling part

21: fastening part

30: support

41: first winch

42: second winch

50: wire

Claims (11)

In the foldable derrick structure for ships, A derrick including an upper derrick element, a lower derrick element, and a hinge coupling that rotatably couples the upper derrick element to the lower derrick element; A drive unit for transmitting a driving force so that the upper derrick element can be rotated and folded with respect to the lower derrick element; Including, And the upper derrick element is configured to fold and rotate with respect to the lower derrick element while the lower derrick element is fixedly supported on the vessel. The foldable derrick of claim 1, wherein the driving unit is disposed on both sides of the derrick, and includes a plurality of rotation driving units for transmitting a driving force so that the upper derrick element can be rotated and folded with respect to the lower derrick element. rescue. The foldable derrick structure of claim 1, wherein the hinge coupler is installed at both sides of the upper derrick element to be detachably coupled to the lower derrick element. The method of claim 1, wherein the upper derrick element is composed of a vertically divided first derrick element and a second derrick element, And the first derrick element and the second derrick element are configured to be folded and rotated in opposite directions, respectively. The method according to claim 4, wherein the first derrick element and the second derrick element each of the hinge engaging portion rotatably coupled to the lower derrick element; A fastening portion fixedly secured to said lower derrick element; Including, The first derrick element and the second derrick element, respectively, after separating the fastening portion, the foldable derrick structure for a ship, characterized in that configured to be rotated and folded in opposite directions with respect to the hinge coupling portion. The ship's foldable derrick structure according to any one of claims 1 to 5, further comprising a support for supporting the rotated upper derrick element. The foldable derrick structure for a ship according to claim 6, wherein the support is detachably installed on the lower derrick element. The rotating drive unit according to any one of claims 1 to 5, A wire connected to the upper derrick element; A winch winding the wire to transmit a driving force to the upper derrick element; Including, And the winch is configured to loosen the wire while maintaining the tension to prevent sudden rotation of the upper derrick element when the upper derrick element rotates in a direction opposite to the winding direction of the wire. The foldable derrick structure for a ship according to any one of claims 1 to 5, wherein the height of the lower derrick element is the height level of the highest structure excluding the derrick in the vessel. In the foldable derrick structure for ships, The derrick consists of an upper derrick element and a lower derrick element, wherein the upper derrick element is coupled to the lower derrick element foldable with respect to the lower derrick element. The method of claim 10, wherein the upper derrick element is composed of a vertically divided first derrick element and a second derrick element, And the first derrick element and the second derrick element are configured to be folded and rotated in opposite directions, respectively.

Images