KR102196986B1 - A drillship - Google Patents

Abstract

The present invention relates to a drillship, comprising: a setback area for mounting a provisionally assembled drill pipe; And a cylinder rig for lowering the drill pipe mounted in the setback area to the seabed, wherein the setback area is installed on the same deck as the cylinder rig.

Description

Drillship {A drillship}

The present invention relates to a drillship.

As the use of resources such as petroleum has skyrocketed due to the recent rapid industrialization, stable production and supply of petroleum is emerging as a very important problem. However, a lot of drilling has already been made for oil fields in continental or coastal waters, and in recent years, attention has been focused on the development of oil fields located in deep waters, and drillships are generally used to drill such deep-sea oil fields.

Drillship is an offshore structure that is manufactured in a shape similar to a ship so that it can navigate with its own power and equipped with advanced drilling equipment.It is possible to collect crude oil or gas in a deep sea area where the installation of an offshore platform is impossible. There is an advantage in that drilling can be terminated at, and drilling can be carried out again by moving to another point.

Such a drillship includes a derrick having a Moonpool structure in the form of penetrating vertically, located above the moonpool, and having drilling equipment. Hereinafter, a process of drilling the drillship in the seabed will be described.

First, the drillship uses its own power to move to the drilling target area and drives a dynamic positioning system (DPS) using a plurality of thrusters to maintain the position.

After that, the drillship is to connect a drill bit to a drill pipe and connect a plurality of drill pipes to a sufficient length using a hoisting system and a handling system provided in the derrick. After descending to the bottom of the sea through a rotating system (Rotating System) to rotate the drill pipe to form a borehole.

When drilling is completed in the first time, derrick recovers the drill pipe, installs a casing pipe in the borehole, performs cementing work to fill concrete between the casing pipe and the borehole, and rebuilds the drill pipe. By repeatedly performing the drilling operation used and the casing and cementing operation to install the casing pipe, the shape of the borehole having a certain depth is maintained.

If the casing pipe is sufficiently installed to prevent the borehole from collapsing, a blow out preventer (BOP) is connected to the riser to be coupled to the borehole, and the inside of the riser becomes the movement path of the drill pipe and the casing pipe. .

However, during the drilling process, it is necessary to lubricate and cool the drill bit and to treat crushed material such as rock mass generated inside the borehole. Therefore, the drillship supplies mud to the inside of the drill pipe so that the mud is discharged from the distal end of the drill bit, and after the mud performs lubrication and cooling of the drill bit, the upper part through the inside of the riser from the outside of the drill pipe together with the ground material. It uses the Mud Circulation System to be recovered. The recovered mud is reused after the crushed material is filtered.

Drillship drives such a mud circulation system and repeatedly performs drilling, casing, and cementing operations until the drill bit reaches the well. In this case, as the diameter of the casing pipe used for the casing decreases, relatively Drilling can be continuously implemented by replacing the small sized drill bit.

As such, the drillship includes a system for installing and using drill pipes and risers, a system for using mud, etc., and a moonpool structure, a derrick structure, and a loading structure for smoothly implementing drilling using these systems. Since it has to be placed in a certain space, research and development are continuously being made as a fairly high technology is required.

Korean Patent Publication No. 10-0976598

Korean Patent Application Publication No. 10-2007-0090604

The present invention has been created to solve the problems of the prior art as described above, and an object of the present invention is to provide a drillship having improved drilling efficiency by improving the structure so as not to have a chute while having a cylinder rig.

A drillship according to an embodiment of the present invention includes: a setback area for mounting a provisionally assembled drill pipe in the drillship floating in the ocean and drilling the seabed; And a cylinder rig for lowering the drill pipe mounted in the setback area to the seabed, wherein the setback area is installed on the same deck as the cylinder rig.

Specifically, the setback area may be installed on the drill floor together with the cylinder rig.

Specifically, it may further include a vertical lacquer for transmitting the drill pipe mounted in the setback area to the cylinder rig.

Specifically, the vertical lacquer may be mounted in the setback area by temporarily assembling the drill pipe.

Specifically, the vertical lacquer may be installed on the drill floor.

Specifically, the vertical lacquer may be provided in at least two or more to be able to back up each other.

Specifically, the vertical lacquer may be provided between the setback area and the cylinder rig on the drill floor.

Specifically, a chute for transferring the drill pipe mounted in the setback area to the cylinder rig may be omitted.

The drillship according to the present invention is provided to install a drill pipe using a cylinder rig, and the setback area for mounting the pre-assembled drill pipe is arranged on the drill floor, so that the chute is omitted in the process of transferring the pre-assembled drill pipe to the cylinder rig. As it can be done, it has the effect of improving the structure, reducing work man-hours, and reducing drilling work time.

1 is a side view of a drillship according to an embodiment of the present invention.
2 is a front view of a drillship according to an embodiment of the present invention.
3 is a plan view of a drillship according to an embodiment of the present invention.
4 is a cross-sectional view of B in FIG. 1.
5 is a cross-sectional view of C in FIG. 1.
6 is a cross-sectional view of D in FIG. 1.
7 is a cross-sectional view of E in FIG. 1.

Objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments associated with the accompanying drawings. In adding reference numerals to elements of each drawing in the present specification, it should be noted that, even though they are indicated on different drawings, only the same elements are to have the same number as possible. In addition, in describing the present invention, when it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in this specification, it is noted that the drillship is used in the sense of encompassing all facilities floating on the sea and drilling the seabed (a drilling vessel having a ship shape, a semi-submersible drilling unit, etc.).

In addition, hereinafter, the front-rear direction means a direction parallel to the longitudinal direction of the hull, and the left-right direction may mean a direction parallel to the left-right direction of the hull.

1 is a side view of a drillship according to an embodiment of the present invention, Figure 2 is a front view of a drillship according to an embodiment of the present invention, Figure 3 is a plan view of the drillship according to an embodiment of the present invention. 4 is a cross-sectional view of B in FIG. 1, FIG. 5 is a cross-sectional view of C in FIG. 1, FIG. 6 is a cross-sectional view of D in FIG. 1, and FIG. 7 is a cross-sectional view of E in FIG.

1 to 7, the drillship 1 according to an embodiment of the present invention includes a hull 10, a drilling system 20, a drill assist system 40, a transfer system 30, a mud system ( 50), and the power system 60.

The hull 10 forms the overall shape of the drillship 1. Hereinafter, for convenience, the hull 10 will be described by limiting that the drillship 1 of the present invention has the shape of a ship.

The hull 10 may be divided into a bow 11, a central portion 12, and a stern 13 in the front and rear direction. The bow 11 is forward based on the direction in which the drillship 1 sails, and a spherical bow (not shown) may protrude. A cabin 111 having a certain height may be provided in the player 11.

The central part 12 is a space between the bow 11 and the stern 13 for drilling work. Therefore, a moonpool 121 is formed in the central part 12 and various equipments may be placed. Since there is a possibility that explosive gas may be introduced from the oil well into the moonpool 121 and the equipment may collide with the hull 10 while operating the drilling equipment, the moonpool 121 has a circumference to protect the surrounding of the moonpool 121 It may be surrounded by the cofferdam 122.

In addition, a drill pipe (P) and a riser (R) may be loaded on the central part 12. Of course, the loading of the drill pipe (P) and the riser (R), etc., may be loaded on the bow 11 and/or the stern 13 if possible in space. That is, the mounting position of the drill pipe P and the riser R is not particularly limited.

The stern 13 is rear based on the direction in which the drillship 1 navigates, and an engine room 61 accommodating the engine 611 may be disposed. Unlike the propellers and rudders provided on the stern 13 in general merchant ships, the drillship 1 of this embodiment is provided with a plurality of thrusters (not shown) on the bows 11 and sterns 13 and can be steered without a rudder. It is possible.

Since the engine 611 is provided at the stern 13, an engine casing (not shown) for discharging the exhaust of the engine 611 to the outside may be disposed on the stern 13.

When the hull 10 is viewed from the front cross-section, the hull 10 may have a substantially rectangular shape consisting of a deck 14, a side shell 15, and a bottom plate 16. In this case, the deck 14 may include a drill floor 14a, an upper deck 14b, a main deck 14c, and the like in order of higher height.

The drill floor 14a is a deck 14 provided with a cylinder rig 21 for lowering the drill pipe P and the riser R, and drilling work is performed. The drill floor 14a may be formed above the moonpool 121 as a space for performing a drilling operation.

The drill floor 14a may be provided with a cabin 26, which is a control room for integrally controlling drilling, and cylinder rigs 21 are provided to the left and right of the cabin 26, and a vertical lacquer 25 is provided in front of the cabin 26. ) Can be provided. The arrangement on the drill floor 14a will be described later in detail.

Before and after the drill floor 14a, a catwork deck 141 on which a catwork machine 32 for transferring the drill pipe P or riser R is installed may be extended. The catwalk deck 141 may be a space that implements horizontal movement of a drill pipe (P) or riser (R) during a drilling operation.

The catwalk deck 141 needs to be implemented only by installing the catwalk machine 32, so it may be provided to have a smaller left and right width than the drill floor 14a, or simply instead of the catwalk deck 141 Only the catwalk rail 321 for installation may be provided.

The upper deck 14b is provided before and after the central portion 12, the bow 11 and the stern 13, and is exposed upward to support various equipment. The upper deck 14b may be referred to as a panel deck or the like. Various equipment supported by the upper deck 14b may be equipment necessary for drilling, but is not particularly limited, and the upper deck 14b may support structures such as engine casing or cabin 111 in addition to equipment.

A well test area 142 may be provided in the upper deck 14b provided on the stern 13. The well test area 142 means a work space for testing and inspecting an oil well. At this time, around the well test area 142, a crane 31 that is rotatably provided based on a predetermined point may be disposed.

A riser (R) may be loaded under the upper deck (14b) provided on the player (11). The riser (R) may be loaded directly under the catwalk machine 32 located in front of the drill floor (14a). On the other hand, the drill pipe P may be loaded in front of the well test area 142 in the upper deck 14b of the stern 13. That is, the drill pipe (P) may be mounted on the upper deck (14b), the riser (R) in the interior of the hull 10 under the upper deck (14b). Of course, the loading space of the drill pipe (P) and the riser (R) is not limited to the above as mentioned above.

During drilling, the drill pipe (P) loaded on the upper deck (14b) is placed on the catwork machine (32) disposed at the rear of the drill floor (14a) by the crane (31) and then transferred to the drill floor (14a). , The riser (R) loaded inside the hull 10 may be transferred to the drill floor 14a after being placed on the catwalk machine 32 disposed in front of the drill floor 14a by the riser transfer unit 33.

At this time, since the upper deck (14b) and the drill floor (14a) have a height difference in the vertical direction, the crane 31 or the riser transfer unit 33 raises the drill pipe (P) or riser (R) while raising the catwalk machine (32). ). This will be described later.

The main deck 14c is located below the drill floor 14a and supports the drill floor 14a on which the cylinder rig 21 is placed. The main deck 14c may be a deck 14 supporting the cylinder rig 21, and in this specification, the main deck 14c is generally used in the drillship 1 like the drill floor 14a or the panel deck. Note that the meaning of the term can be covered.

The main deck 14c may be provided with a support 143 and a support 144 for supporting the drill floor 14a, and the support 144 is provided in an inclined form from the inside of the support 143, while a cylinder rig The load of (21) can be distributed.

The drilling system 20 implements drilling. The drilling system 20 includes a cylinder rig 21, a main well 22, an auxiliary well 23, a setback zone 24, a vertical lacquer 25, a cabin 26, and the like.

The cylinder rig 21 lowers the drill pipe P or riser R to the seabed. The cylinder rig 21 may be configured to lower the drill pipe (P) or riser (R) to the seabed through the main well 22 or the auxiliary well 23 after erecting it in a vertical direction.

In the present invention, unlike the case of using a conventional derrick and drawworks, the cylinder rig 21 for lowering the drill pipe P or the like using the cylinder 212 may be used. In the conventional case, the drawworks, which is a huge winch, increases the speed of the wire as the capacity increases, but there is a limit here, so it cannot be applied beyond a certain capacity. However, the drillship 1 of the present invention can safely and stably implement drilling requiring a large-capacity hoisting system as the cylinder rig 21 is used.

At least one cylinder rig 21 may be provided. For example, two cylinder rigs 21 may be disposed in the front and rear directions of the hull 10. At this time, the arrangement of the cylinder rig 21 may correspond to the main well 22 and the auxiliary well 23, respectively.

However, in the present specification, it is noted that two or more cylinder rigs 21 can be bundled and expressed as one cylinder rig 21.

The cylinder rig 21 may include a tower 211, a cylinder 212, a piston 213, a gripping part 214, a wire 215, and a pulley part 216. The tower 211 is a structure fixedly installed on the drill floor 14a, and may have a truss structure. In the present invention, the tower 211 only supports the cylinder 212 and the like, and it is not necessary to directly withstand the load generated when the drill pipe P is lowered.

The cylinder 212 is installed on the drill floor 14a. At least one cylinder 212 may be provided, and may be disposed in parallel.

The piston 213 is provided so as to move up and down from the drill floor 14a by a cylinder 212 provided on the drill floor 14a. That is, the piston 213 may be provided so as to protrude upward from the cylinder 212, and a pulley part 216 is provided at the upper end of the piston 213, and the lifting of the pulley part 216 by the lifting of the piston 213 Can be done.

The gripping part 214 may include top drive equipment (not shown), and the like, and grips the drill pipe P or riser R. The gripping part 214 may be provided to be able to move up and down while gripping the drill pipe P or the like in order to vertically lower the drill pipe P or the riser R to the sea floor.

At this time, the gripping part 214 may be guided by the tower 211, and a rail (not shown) for guiding the lifting of the gripping part 214 may be installed in the tower 211.

The wire 215 has one end connected to the gripping portion 214 and the other end connected to the drill floor 14a. However, as the other end of the wire 215 is connected to the drill floor 14a through a compensator 217, the drill pipe P gripped during the heave motion of the drillship 1 by waves ) To keep the vertical position constant. The compensation device 217 may be installed in the cylinder 212, not the drill floor 14a, depending on the type.

The pulley part 216 winds the wire 215 and moves up and down by the piston 213 to realize the lifting and lowering of the gripping part 214. The pulley portion 216 may be provided to be guided by the tower 211 like the gripping portion 214. When the piston 213 is raised by hydraulic pressure, the pulley portion provided on the upper end of the piston 213 ( 216 rises from the tower 211.

At this time, since the wire 215 maintains a state wound around the rising pulley portion 216 while the other end is fixed to the drill floor 14a, one end of the wire 215 rises. Therefore, the gripping portion 214 connected to one end of the wire 215 also rises, and by this principle, the drill pipe P may rise or fall in reverse.

The main well 22 is provided on one side of the cylinder rig 21 in the left-right direction of the hull 10. For example, as shown in the drawing, the main well 22 may be provided on the right side of the cylinder rig 21.

The main well 22 is a place where drilling by the drill pipe P is directly performed together with the descending and assembly of the drill pipe P.

In the main well 22, the drill pipe P, which was temporarily assembled and mounted in the setback area 24, is assembled, and the drill pipe P descends into the inside of the pre-installed riser R. However, when the casing pipe (not shown) is lowered and assembled from the auxiliary well 23, the drill pipe P may be temporarily assembled in the main well 22.

The auxiliary well 23 may be provided parallel to the main well 22 in the front and rear direction of the hull 10, and may be provided on the left side of the cylinder rig 21. In this case, the auxiliary well 23 may be provided behind the main well 22.

The auxiliary well 23 is a space where the casing pipe is assembled or the drill pipe P is temporarily assembled, and may not be connected to the drilled oil well.

The setback area 24 mounts the drill pipe P that is temporarily assembled. The drill pipe (P) may be individually loaded on the upper deck (14b), and the loaded drill pipe (P) is placed on the catwork machine 32 by a crane 31 or the like, and then by the catwork machine 32. It is transmitted to the drill floor 14a.

At least two or three or more drill pipes (P) are provisionally assembled by a vertical lacquer (25) to be described later, and the provisionally assembled drill pipe (P) is a setback area (24) before descending to the seabed by the cylinder rig (21). Can be mounted by.

As the drill pipe (P) is temporarily assembled and mounted in this way, the present invention prevents the loading space of the drill pipe (P) from becoming too large, and is required for the lowering operation of the drill pipe (P) by the cylinder rig (21). You can save time. This is similar to the case of providing a fingerboard in the existing derrick structure.

The setback area 24 may be formed in a comb shape or the like, and at least one pre-assembled drill pipe P may be mounted between the comb teeth. At this time, the setback area 24 of the present invention may be installed on the same deck 14 as the cylinder rig 21.

Specifically, the setback zone 24 of the present invention may be installed on the drill floor 14a together with the cylinder rig 21. In the case of a conventional drillship using a cylinder rig, the setback area for mounting the provisionally assembled drill pipe (P) was not installed on the drill floor, but was installed on a deck located below the drill floor.For example, it is installed on the main deck or inside the hull. Installed in tank tops, etc.

However, in this case, in order to transfer the drill pipe P mounted in the setback area to the cylinder rig, it is necessary to raise the drill pipe P from the setback area to the drill floor. To this end, conventionally, an inclined chute is provided between the setback area and the drill floor, and if the drill pipe (P) mounted in the setback area is tilted to the chute, the chute tilts the drill pipe (P). It will be raised to the drill floor in the photo state.

That is, when the cylinder rig 21 and the setback area 24 are to be used, conventionally, since the setback area was installed below the drill floor, an equipment called a chute for transferring the drill pipe P from the setback area to the drill floor. Installation was essential.

At this time, since the chute is provided for each of the main well 22 and the auxiliary well 23 and cannot be backed up to each other, when the chute provided in the main well 22 is stopped due to a failure or the like, the catwalk machine 32 ) Can be supplied through the drill pipe (P), but there is a problem that the efficiency is lowered because the length is shorter than that of the provisionally assembled drill pipe (P).

Also, as the chute is installed between the setback area and the cylinder rig, it has a size to transport the drill pipe (P) as much as the height difference between the setback area and the cylinder rig. It had to be.

In order to solve these problems, the present invention installs the setback zone 24 on the drill floor 14a like the cylinder rig 21, so that the drill pipe P mounted on the setback zone 24 is connected to the cylinder rig 21. ), the chute for transport was omitted.

At this time, the transmission of the drill pipe P between the setback zone 24 and the cylinder rig 21 may be performed by the vertical lacquer 25. Since the setback zone 24 and the cylinder rig 21 are provided at the same height, the present invention is to drill from the setback zone 24 to the cylinder rig 21 simply by horizontally moving the drill pipe (P) vertically. It is possible to implement the delivery of the pipe (P).

Therefore, in the present invention, since the chute is omitted between the setback area 24 and the cylinder rig 21, it is possible to further secure a space around the moonpool 121 or on the drill floor 14a, and efficiently Can be utilized to maximize overall batch efficiency.

The setback area 24 may be provided integrally with the cylinder rig 21. In the conventional case of using the chute, as the setback area is located below the drill floor on which the cylinder rig is installed, the setback area and the cylinder rig have to be individually manufactured and mounted on the hull.

However, according to the present invention, the setback area 24 and the cylinder rig 21 are provided integrally, so that the setback area 24 and the cylinder rig 21 are integrally manufactured and then mounted on the drill floor 14a at once. To be. To this end, the lower end of the setback zone 24 and the lower end of the cylinder rig 21 may lie on the same plane.

Specifically, the setback area 24 may be provided integrally with the tower 211 of the cylinder rig 21. The setback area 24 is a structure that does not require a separate operation unit, and the tower 211 of the cylinder rig 21 is also a structure fixedly installed on the drill floor 14a, so the present invention relates to the tower of the cylinder rig 21 ( By integrating the setback area 24 in 211), it is possible to reduce work man-hours and increase structural stability.

The vertical racker (25) delivers the drill pipe (P) mounted in the setback area (24) to the cylinder rig (21). In addition, the vertical lacquer 25 may be temporarily assembled using an auxiliary well 23 or a mouse hole to mount the drill pipe P transmitted through the catwalk machine 32 to the setback area 24. .

The vertical lacquer 25 can be installed on the drill floor 14a together with the setback area 24 and the cylinder rig 21, along the rail 252 to the main well 22 side and the auxiliary well 23 It may be provided to be movable between sides. However, in this specification, the rail 252 is a configuration provided in the hull 10 to implement the movement of the vertical lacquer 25, or it should be noted that it may be understood as a subordinate configuration of the vertical lacquer 25.

The gripping arm 251 of the vertical lacquer 25 may include a main arm, an upper arm, a lower arm, etc., and freely close to the setback area 24 or the cylinder rig 21 through a folding or unfolding operation. It is prepared to do.

The vertical lacquer 25 is provided between the setback area 24 and the cylinder rig 21 on the drill floor 14a. Two or more vertical lacquers 25 installed to be movable on the rail 252 are either Even if it fails, it can be backed up with another one.

Specifically, in the present invention, when the vertical lacquer 25 close to the main well 22 is stopped due to a failure, the failed vertical lacquer 25 is removed to one side using the rail 252, and along the rail 252 The other vertical lacquer 25 may be moved toward the main well 22, and then the work in the main well 22 may be continuously implemented using the vertical lacquer 25 capable of operating normally. The same applies to the case where the vertical lacquer 25 adjacent to the auxiliary well 23 is broken.

That is, in contrast to the conventional method of providing chutes that were fixedly installed on the side of the main well 22 and the auxiliary well 23 respectively, the present invention installs the setback area 24 and the cylinder rig 21 on the drill floor 14a. And, by using the vertical lacquer 25 provided between the setback area 24 and the cylinder rig 21, the delivery of the provisional drill pipe P from the setback area 24 to the cylinder rig 21 is simple and quick. While this can be implemented, the work in the main well 22 or the auxiliary well 23 can be prevented from being unnecessarily stopped as the vertical lacquers 25 back up each other. Therefore, the present invention can secure the effect of increasing the efficiency of the drilling operation, cost reduction.

As mentioned above, since both the setback zone 24 and the cylinder rig 21 are installed on the drill floor 14a, the vertical lacquer 25 is drilled pipe (P) from the setback zone 24 to the cylinder rig 21. ) Is only required to be relatively horizontal.

That is, the present invention can minimize the vertical movement of the drill pipe P when the provisional drill pipe P is transferred from the setback area 24 to the cylinder rig 21. Accordingly, the present invention can effectively save time in a drilling operation in which the drill pipe P must be lowered to the seabed.

Hereinafter, the operation in the main well 22 and the auxiliary well 23 will be described in the present invention having the setback area 24 in the drill floor 14a. However, in the operation described below, the installation of the drilling and ejection prevention device 43 performed before the installation of the ejection prevention device 43 will be omitted.

First, the riser (R) that was loaded inside the hull (10) is transferred to the main well (22) through the catwalk machine (32). At this time, the main well 22 may be lowered toward the sea floor while assembling after the riser R is erected. Of course, a jet preventing device 43 may be connected to the lower end of the riser R.

When the riser R is lowered from the main well 22, the auxiliary well 23 may be temporarily assembled with the drill pipe P by the vertical lacquer 25. That is, the drill pipe (P) that was loaded on the upper surface of the hull (10) can be transferred to the auxiliary well (23) by using a catwalk machine (32) different from the catwalk machine (32) transporting the riser (R). , In the auxiliary well 23, temporary assembly for 2 to 4 drill pipes P may be performed by the vertical lacquer 25. At this time, the provisionally assembled drill pipe P is stored in the setback area 24 installed on the drill floor 14a.

If the riser (R) is sufficiently assembled and lowered in the main well (22), the riser (R) can be installed in the oil well, and at the same time, in the auxiliary well (23), the drill pipe (P) by the vertical lacquer (25) Temporary assembly and mounting in the setback area 24 can be made.

For reference, it goes without saying that the provisional assembly of the drill pipe P described above may be implemented by a mouth hole or a rotary sock in addition to the main well 22 or the auxiliary well 23.

The drill pipe P temporarily assembled in the auxiliary well 23 and the drill pipe P temporary assembled in the main well 22 may be mounted in the same setback area 24. Since the vertical lacquer 25 has a structure in which two or more of them can work while changing positions along the rail 252, the vertical lacquer 25 and the auxiliary well for temporary assembly of the drill pipe P in the main well 22 Even if the vertical lacquers 25 for temporarily assembling the drill pipe P in (23) are different from each other, the gripping arm 251 moves along the rail 252 and the drill pipe temporarily assembled in one setback area 24 ( P) can be mounted smoothly.

After the riser R is installed in the oil well, the drill pipe P, which was temporarily assembled, is lowered and assembled in the main well 22.

The vertical lacquer 25, which has performed the work of temporarily assembling the drill pipe P and mounting it on the setback area 24, can take out the drill pipe P mounted on the setback area 24 and transfer it to the cylinder rig 21. have. At this time, the cylinder rig 21 may be assembled while transferring the provisionally assembled drill pipe P to the inside of the riser R.

When the drill pipe P is lowered and assembled from the main well 22, drilling is performed by a drill bit (not shown) connected to the bottom of the drill pipe P, and into the interior of the drilling pipe. Mud can be supplied. At this time, the mud is recovered to the main well 22 along the inside of the riser R along with gas ejected from the oil well.

The cabin 26 is provided on one side of the cylinder rig 21 and controls the drilling operation. The cylinder rig 21 is provided with a pair of cylinders 212, a piston 213, a gripping part 214, and a pulley part 216 in one tower 211, for example, a main well 22 or an auxiliary well. It may have a structure corresponding to (23), the cabin 26 may be disposed between the cylinder rig 21 provided in a pair.

The cabin 26 is a control room that controls the drilling described above as a whole, and may be provided on the drill floor 14a. That is, the cabin 26 is provided on the upper surface of the hull 10.

The cabin 26 may be configured such as a control room and a general control room. However, the cabin 26 is in charge of drilling work of the drillship 1, and operation control of the drillship 1 may be performed in the cabin 111.

The transfer system 30 transfers the drill pipe P and the riser R to a desired position. The transfer system 30 may include a crane 31, a catwalk machine 32, and a riser transfer unit 33.

The crane 31 transports the drill pipe P or the like to the catwork machine 32. The crane 31 may be installed at least one or more in front or rear of the drill floor 14a in the bow 11, the stern 13, and the central part 12, and is of a type provided to be rotatable based on the installed point. I can. For example, the crane 31 may be a knuckle boom crane or the like.

The crane 31 may be installed on the upper deck 14b, and the column structure may be extended downward to the main deck 14c and supported. This can be freely changed according to the specifications of the crane 31.

The crane 31 installed on the stern 13 can move the drill pipe P loaded on the upper deck 14b to the catwork machine 32 provided at the same height as the drill floor 14a, and the drill pipe The catwalk machine 32 that has received (P) may move to the drill floor 14a along the catwalk rail 321 and transfer the drill pipe P to the vertical lacquer 25.

On the other hand, the crane 31 installed on the bow 11 can move the riser R loaded in the ship to the catwalk machine 32 provided at the same height as the drill floor 14a, but on the bow 11 Transfer of the riser (R) by the provided crane 31 can be used as a backup.

That is, the main transport of the riser (R) is made by the riser transport unit 33, but if a problem occurs in the riser transport unit 33, a crane 31 installed on the bow 11 may be used to back up the problem.

The catwalk machine 32 is provided at the same height as the drill floor 14a, and can be moved to the drill floor 14a after loading the drill pipe P or riser R at a position far from the drill floor 14a. . At this time, the catwalk machine 32 is provided to be horizontally movable on the catwalk deck 141 or the catwalk rail 321.

The catwalk machine 32 may be provided before and after the cylinder rig 21, respectively, and the catwalk machine 32 provided in front of the cylinder rig 21 drills a riser (R) loaded on the bow (11). The catwalk machine 32 which is transferred to the floor 14a and provided at the rear of the cylinder rig 21 may transfer the drill pipe P loaded on the stern 13 to the drill floor 14a.

Of course, since the loading position of the drill pipe (P) and the riser (R) is not particularly limited, for example, when the riser (R) is loaded in the ship of the bow 11 and the drill pipe (P) is loaded outside the ship, one It goes without saying that the catwalk machine 32 may be provided to transport both the riser R and the drill pipe P.

When one catwalk machine 32 can transport both the riser (R) and the drill pipe (P), the cross-sectional area of the drill pipe (P) and the riser (R) is different, so the catwork machine 32 corresponds to it. It may have a cross-sectional shape. That is, the catwork machine 32 may have a semicircle or arc shape in which the riser R is seated, and a partially additional recessed portion may be provided so that the drill pipe P having a relatively small cross-sectional area is seated.

The drill pipe (P) transferred by the catwalk machine 32 is transferred to the vertical lacquer 25, is temporarily assembled, and then mounted in the setback area 24, and the riser R transferred by the catwalk machine 32 is a cylinder It is delivered to the rig 21 and can be lowered and assembled in the main well 22 or the like.

The riser transfer unit 33 transfers the riser R loaded on board the ship to the catwalk machine 32. For example, the riser transfer unit 33, in order to transfer the riser (R) stored in the riser hold 331 to the catwalk machine 32, a first overhead crane 332, a temporary loading unit 333, a second overhead It may include a head crane (334).

The first overhead crane 332 grasps the riser R stored in the riser hold 331 with a yoke or the like, lifts it, and delivers it to the temporary loading unit 333. The temporary loading part 333 may be provided directly below the outlet formed in the riser hold 331, and may be provided at a height where interference does not occur when the first overhead crane 332 moves.

The 2nd overhead crane 334 grasps and raises the riser R loaded in the temporary loading part 333. Since the temporary loading part 333 is arranged vertically and side by side with the outlet of the riser hold 331, the second overhead crane 334 enters the outlet of the riser hold 331 and the riser placed on the temporary loading part 333 ( R) can be pulled out of the riser hold 331 by holding it.

Thereafter, the second overhead crane 334 raises the riser R taken out from the riser hold 331 to the height of the drill floor 14a, and then moves horizontally to transmit the riser R to the catwalk machine 32. . Through this process, the riser transfer unit 33 can smoothly transfer the riser R loaded in the riser hold 331 to the catwalk machine 32.

The drill assist system 40 assists drilling. The drill assist system 40 includes a tensioner 41, a hydraulic device 42, a blowout prevention device (BOP) 43, and the like.

The tensioner 41 applies tension to the riser R. The tensioner 41 applies tension to the riser R connected from the hull 10 to the seabed, thereby stably supporting the riser R and preventing buckling from occurring in the riser R.

The tensioner 41 is installed on the drill floor 14a or a direct acting tensioner that adjusts the tension applied to the riser R pneumatically using a cylinder installed under the drill floor 14a. It can be divided into a wire tensioner 41 having a cylinder part 411 and a roller part 412 installed under the drill floor 14a. In the conventional drillship having a cylinder rig, only a direct acting tensioner could be used.

This is because in the case of a conventional drillship, a setback area is placed below the drill floor, and a chute extending inclined vertically between the setback area and the drill floor is provided, so that the wire tensioner 41 cannot be used due to interference. .

However, in the case of using the direct acting tensioner, the cylinder is exposed to seawater as the cylinder is extended and disposed below the drill floor, resulting in poor durability, difficult maintenance, and poor stability because the tension is not widely distributed.

However, in the present invention, since the chute can be omitted as the setback section 24 is installed on the drill floor 14a, the wire tensioner 41 can be used in place of the direct acting tensioner.

At this time, the wire tensioner 41 may include a cylinder part 411 for adjusting the tension of the wire 413 and a roller part 412 for guiding the wire 413. The cylinder part 411 may be provided on the outside of the cylinder rig 21 while being installed on the drill floor 14a, and the tension applied to the riser R by contraction or tension movement of a piston (not shown) Can be adjusted. At this time, the movement of the piston may be implemented by compressed air filled in the cylinder part 411.

The roller part 412 may be disposed under the cylinder rig 21 from the lower side of the drill floor 14a. The roller part 412 may be provided on the opposite side of the cylinder part 411 based on the drill floor 14a, and may be installed at a position closer to the main well 22 than the cylinder part 411 when viewed from the top. .

The wire tensioner 41 arranges the cylinder part 411 on the outside of the cylinder rig 21 on the drill floor 14a, and extends the wire 413 from the cylinder part 411 to the lower side of the drill floor 14a. After winding on the located roller part 412, it is connected by a riser (R). When the wire tensioner 41 is disposed in a conventional drillship having a chute, it is connected between the cylinder part 411 and the roller part 412. The wire 413 is bound to interfere with the suit.

On the contrary, in the present invention, the chute is omitted and the setback area 24 is disposed on the drill floor 14a, so that the cylinder portion 411 is the main well 22 or the auxiliary well 23 in the drill floor 14a. When provided on the outside of the setback zone 24 and the cylinder rig 21 as a reference (or the center of the drill floor 14a), the cylinder rig 21 from the lower side of the drill floor 14a from the cylinder portion 411 And there is no room for the wire 413 extending toward the roller portion 412 provided below the setback area 24 to interfere with other configurations.

Therefore, unlike the prior art, the present invention does not use a direct acting tensioner while using the cylinder rig 21, but instead uses a wire tensioner 41, so that maintenance is easy and tension adjustment is efficient.

The hydraulic device 42 supplies hydraulic oil to the cylinder rig 21 or the like. In the case of the present invention, the hydraulic device 42 may be disposed at a position outwardly deviated from the drill floor 14a. That is, the hydraulic device 42 can be disposed rearward from the drill floor 14a on the upper deck 14b, and a catwalk machine for transporting the drill pipe P directly above the room where the hydraulic device 42 is provided. A catwalk rail 321 capable of moving 32 may be supported.

The hydraulic device 42 is preferably installed close to the cylinder rig 21, but the installation position is not particularly limited, and may be installed under the drill floor 14a as an example.

The ejection prevention device 43 is installed on the seabed and a riser R is connected to the top. The ejection prevention device 43 is a device for preventing an explosion from occurring due to gas or crude oil discharged from an oil well, and may have a structure having a plurality of valves.

The ejection preventing device 43 may be mounted on one side of the moonpool 121 and then moved through a configuration such as a gantry crane 431 and a trolley 432, and then connected to the riser R and descending to the seabed. At this time, in the present invention, instead of using a direct acting tensioner having a cylinder extending downward from the lower side of the drill floor 14a to the moonpool 121, a roller part 412 is provided on the lower side of the drill floor 14a. Since only the wire tensioner 41 is used, the problem of interference with the tensioner 41 does not occur at all during the movement of the ejection preventing device 43.

In the conventional case of using the direct acting tensioner, there is a problem that the cylinder of the direct acting tensioner is disposed on the conveying path of the ejection preventing device 43, so a configuration (trip saver, etc.) for temporarily moving the position of the direct acting tensioner itself is required. It had to be prepared.

However, in the present invention, as the position of the setback zone 24 is limited to the drill floor 14a, a wire tensioner 41 can be used in place of the direct acting tensioner, through which the tensioner on the movement path of the ejection prevention device 43 (41) can completely solve the problem of the conventional interference.

The mud system 50 supplies mud to the drill pipe P. Mud supplied to the drill pipe P by the mud system 50 can be recovered by rising along the inside of the riser R after being discharged from the drill bit.

In addition to the mud pit 51, the mud system 50 may include various components for supplying, recovering, and processing mud, and these components are already widely known in the art, and thus detailed descriptions thereof will be omitted.

The power system 60 produces and supplies energy used in the drillship 1. The power system 60 includes an engine 611 installed in the engine room 61, a transformer (not shown), a power cable (not shown) for converting the voltage of power generated from the engine 611, It may further include a switch board (not shown).

As an example, a total of three engines 611 may be provided, and the engine 611 generates rotational force by driving with oil or gas, and power using a generator (not shown) connected to the rotational shaft of the engine 611 Can produce.

The electric power generated at this time is used in the drillship 1 to achieve various purposes. For example, power may be transmitted to the thruster for navigation of the drillship (1), and may be transmitted to the vertical lacquer (25) for drilling, and in addition to the hydraulic device (42), the catwalk machine (32), etc. Can be. In addition, power may be transmitted to the cabin 111 in which the crew or the like resides.

The power produced by the engine 611 is a high voltage, but may not match the voltage required by a consumer such as the vertical lacquer 25. Accordingly, the power system 60 may include a transformer for voltage regulation, and the switch board may include a high voltage switch board for a high voltage consumer and a low voltage switch board for a low voltage consumer.

In addition, the power system 60, of course, may further include configurations for smoothly transferring the power generated by the engine 611 to various demanders.

As described above, the present invention provides a cylinder rig 21 to enable work in the deep sea, while efficiently improving the structure and arrangement of components required for drilling, thereby increasing workability and securing structural stability. As a result, the satisfaction of ship owners can be greatly increased.

In addition to the above-described embodiments, the present invention may include a combination of at least some of the configurations of the present invention with the prior art mentioned in the present specification or the prior art widely known in the art to which the present invention belongs. For example, the present invention may further include an embodiment in which the setback zone 24 and the cylinder rig 21 are provided in a separate type.

Although the present invention has been described in detail through specific examples, this is for explaining the present invention in detail, and the present invention is not limited thereto, and within the technical scope of the present invention, those of ordinary skill in the art It would be clear that the transformation or improvement is possible.

All simple modifications to changes of the present invention belong to the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

1: Drillship P: Drill pipe
R: riser 10: hull
11: Player 111: Cabin
12: central part 121: moonpool
122: Cofferdam 13: Stern
14: deck 14a: drill floor
14b: upper deck 14c: main deck
141: catwalk deck 142: well test area
143: support 144: support
15: side shell plate 16: ship bottom plate
20: drilling system 21: cylinder rig
211: tower 212: cylinder
213: piston 214: grip portion
215: wire 216: pulley portion
217: compensator 22: main well
23: auxiliary well 24: setback zone
25: vertical lacquer 251: phage arm
252: rail 26: cabin
30: transfer system 31: crane
32: catwalk machine 321: catwalk rail
33: riser transfer unit 331: riser hold
332: first overhead crane 333: temporary loading part
334: second overhead crane 40: drill assist system
41: tensioner 411: cylinder portion
412: roller part 413: wire
42: hydraulic device 43: jet prevention device
431: gantry crane 432: trolley
50: mud system 51: mud pit
60: power system 61: engine room
611: engine

Claims (8)

In the drillship floating in the ocean and drilling the seabed,
A well section including a main well in which a drill pipe is lowered, assembled, and drilled by the drill pipe, and an auxiliary well provided in parallel with the main well in a front and rear direction of the hull and in which the drill pipe is temporarily assembled;
A setback area for mounting the pre-assembled drill pipe;
A cylinder rig for lowering the drill pipe mounted in the setback area to the seabed; And
It includes a vertical lacquer for transmitting the drill pipe mounted in the setback area to the cylinder rig,
The setback zone is installed on the same deck as the cylinder rig,
The cylinder rig,
One tower installed on the drill floor;
A cylinder installed on the drill floor;
A piston provided to move up and down from the drill floor by the cylinder;
A gripping part gripping the drill pipe;
A wire having one end connected to the gripping part and the other end connected to the drill floor or the cylinder; And
The wire is wound up and lowered by the piston to implement the lifting and lowering of the gripping portion, but comprising a pulley portion provided to guide the lifting and lowering by the tower
The cylinder, the piston, the gripping portion, the wire and the pulley portion,
It is provided in a pair to correspond to the main well and the auxiliary well, respectively,
The setback area,
It is provided on the opposite side of the cylinder rig based on the well area,
The vertical lacquer,
A drillship, characterized in that it is provided between the well region and the setback region, and is provided to be movable between the main well side and the auxiliary well side along a rail. The method of claim 1, wherein the setback zone,
Drillship, characterized in that installed on the drill floor together with the cylinder rig. delete The method of claim 2, wherein the vertical lacquer,
Drillship, characterized in that the provisional assembly of the drill pipe to be mounted in the setback area. The method of claim 2, wherein the vertical lacquer,
Drillship, characterized in that installed on the drill floor. The method of claim 2, wherein the vertical lacquer,
Drillship, characterized in that provided in at least two or more back up each other. delete The method of claim 1,
Drillship, characterized in that omitting a chute (shute) for transporting the drill pipe mounted in the setback area to the cylinder rig.

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