KR20160036266A - Subsea drilling system - Google Patents

Abstract

The present invention relates to a seabed drilling system, and more particularly, to a seabed drilling system which can increase utilization of a loading space of pipes used in drilling, and can solve restriction on accurate positioning of a drilling structure by performing a drilling work maximally closely to an oil well, and can minimize an operation distance of loading and unloading of a racking arm, and can shorten handling time of the pipe, and can increase speed and reliability of the drilling work, and can prevent marine pollution by satisfying a marine environment regulation. The seabed drilling system according to the present invention includes: a main body which is installed on a blow-out preventer (BOP) on the seabed, and is prepared with an installation space maintaining air tightness inside; a pipe magazine which is installed in the installation space, and is loaded with a number of pipes required in drilling; the racking arm which is installed in the installation space to unload the pipe from the pipe magazine; and a drilling drive which performs the drilling work through the BOP by being delivered with the pipes from the racking arm and connecting the pipes.

Description

Subsea drilling system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a submerged drilling system, and more particularly, to a submerged drilling system installed in a seabed so as to perform a drilling operation smoothly.

Along with the development of submarine mining techniques, drilling lines have been developed with drilling facilities suitable for marginal field or deep-sea oil field development. Conventional submarine drilling has been mainly used for rig ships or fixed platforms for underwater drilling, which can be sailed only by other tugboats and for submarine drilling at anchor point at the sea using a mooring device. However, In recent years, a drillship has been developed to be equipped with advanced drilling equipment and constructed in the same form as a ship so that it can be navigated by its own power, and is used for drilling underwater.

Such a drill ship has a moonpool for entering and exiting various drilling equipment for drilling, and various devices for performing the loading and drilling of pipes necessary for drilling. However, since the conventional drill rig performs drilling at a position spaced upward from the well of the seabed, a system for fixing the position within a relatively precise range is required, and a drilling operation is performed at a position apart from the seabed Thus causing a great deal of difficulty in the drilling operation and a problem of lowering the reliability of the drilling operation.

In order to solve such a problem, a submarine drilling system for drilling a submarine has been developed. As a technique for this, a method and apparatus for drilling a hole in a sea bed of International Patent Publication No. WO2008-100149, There is DRILLING RIG of US07584796.

However, such conventional techniques have a problem that the utilization of the pipe used for drilling is not good, and the drilling operation is limited in speed and reliability. In addition, since these conventional technologies perform drilling operations at the seabed, it has been necessary to satisfy environmental regulations for marine pollution.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and it is an object of the present invention to improve the utilization of a pipe used for drilling and to limit the precise position fixation of a drill rig, To increase the reliability and to satisfy the marine environment regulations.

According to an aspect of the present invention, there is provided an air conditioner comprising: a body installed in a BOP (Blow-Out Preventer) of a seabed and provided with an installation space for maintaining airtightness; A pipe magazine installed in the installation space and loaded with a plurality of pipes required for drilling; A racking arm installed in the installation space to unload the pipe from the pipe magazine; And a drilling drive for connecting and receiving pipes from the racking arms to perform a drilling operation through the BOP.

The pipe magazine includes a plurality of first rotary partitions mounted on the periphery of the plurality of pipes such that the lower parts of the pipe are arranged along the peripheries, and a first slit for entering and exiting the pipe is formed on the side of the first rotary partitions A bottom rotation unit in which a plurality of first rotation driving units for rotating the first rotation partition are installed; And a plurality of second rotary partitions mounted on the upper side of the bottom rotation unit and mounted such that the upper parts of the plurality of pipes are arranged along the circumference are installed outward from the center part, And an upper rotating unit having a plurality of second rotation driving units for rotating the second rotating partition walls.

Wherein the bottom rotation unit is provided such that the first rotation partition is rotatable in a plurality of concentric circles on the lower side of the installation space, and the upper rotation unit includes: And may be rotatably installed in a plurality of concentric circles on the upper side of the installation space.

The first rotating partition is formed on the inner circumferential surface such that a plurality of first pockets on which the lower end of the pipe is seated is formed along the inner circumferential surface and a first support groove on which the side portion of the pipe is supported is positioned on the upper side for each of the first pockets .

The second rotary partition is formed on the inner circumferential surface such that a plurality of second pockets on which the upper end of the pipe is seated is formed along the inner circumferential surface and a second support groove on which the side portion of the pipe is supported is positioned below the second pocket .

The bottom rotating unit may further include a first casing installed inside the assembly in which the first rotating partition is assembled in multiple and a third casing in which a third slit for receiving the pipe is formed on the side facing the rack .

The first rotation driving unit may include: a first gear formed along an inner circumference or an outer circumference of the first rotation partition; A first pinion gear-coupled to the first gear; And a first motor installed to rotate the first pinion.

The upper rotating unit may further include a second casing installed inside the assembly in which the second rotating partition is assembled in multiple and a fourth slit formed in the side toward the rack for receiving the pipe .

The second rotation driving unit may include: a second gear formed along an inner circumference or an outer circumference of the second rotation partition; A second pinion gear-coupled to the second gear; And a second motor installed to rotate the second pinion.

Wherein the locking arm comprises: an arm body provided perpendicularly to the inner side of the bottom rotation unit and the upper rotation unit and rotating about a vertical direction; And a grip arm which is provided on the arm body at a plurality of intervals at an upper and a lower position and in which a gripper for gripping the pipe moves along the radial direction of the bottom rotation unit and the upper rotation unit.

And a guide unit disposed between the bottom rotating unit and the upper rotating unit and installed around the pipe stacked on the bottom rotating unit and the upper rotating unit and having a fifth slit formed on the side facing the rack, .

Wherein the pipe magazine includes a plurality of first rotating partition walls mounted so that a plurality of pipe bottoms are arranged along the perimeter thereof, and the first rotating partition wall is installed to rotate by the first rotation driving unit; And a plurality of second rotary partition walls mounted on the upper portion of the bottom rotation unit and mounted such that the upper portions of the plurality of pipes are arranged along the circumference, Wherein the pipe can be selectively loaded into and unloaded from the multiple first partition walls and the multiple second partition walls by the locking arm.

Wherein the bottom rotation unit is provided such that the first rotation partition is rotatable in a plurality of concentric circles on the lower side of the installation space, and the upper rotation unit includes: And may be rotatably installed in a plurality of concentric circles on the upper side of the installation space.

And a guide unit installed to guide the pipes mounted on the bottom rotation unit and the upper rotation unit.

The pipe magazine may be arranged in a circumferential direction by a rotation partition wall formed in multiple from the center to the outside.

The rotary partition may have a plurality of pockets and a plurality of support grooves for seating a pipe on an inner circumferential surface thereof.

Wherein the drilling drive comprises: a frame vertically installed in the installation space; A top drive installed on the frame so as to move up and down and to grasp and rotate a pipe supplied from the rack; And a rough neck connecting and disassembling pipes to be drilled by the top drive.

And a mud fitting unit installed in the water or under the sea so as to be independent from the drilled structure and supplying the mud from the drilled structure to the BOP.

And a cutting separator for separating the cut from the mud discharged from the BOP and supplying the cut to the mud fitting portion.

The cutting separator may further include a cutting storage unit for storing the cut separated from the cutting separator and delivering the cut to the ROV (Remotely-Operated Vehicle).

According to another aspect of the present invention, there is provided a bipolar air conditioner comprising: a body installed in a BOP (Blow-Out Preventer) of a seabed; A pipe magazine installed in the main body and loaded with a plurality of pipes; And a drilling drive including a racking arm for unloading the pipe from the pipe magazine, the drilling drive connecting the pipe from the rack key to the pipe to perform a drilling operation through the BOP, / RTI >

According to the present invention, the utilization of the pipe used for drilling can be increased and the drilling operation can be performed as close as possible to the oil well, thereby making it possible to solve the limitation on precise position fixation of the drilling structure, The operation distance of loading and unloading of the arm can be minimized, the handling time of the pipe can be shortened, the speed and reliability of the drilling operation can be increased, and marine pollution can be prevented by satisfying the marine environment regulations .

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram illustrating a subsea drilling system according to one embodiment of the present invention.
2 is a side view showing a pipe magazine and a racking arm of a submarine drilling system according to one embodiment of the present invention.
FIGS. 3 and 4 are a top view and perspective view showing a bottom rotating unit of a submarine drilling system according to one embodiment of the present invention.
5 is a cross-sectional view of a bottom rotating unit of a submarine drilling system according to one embodiment of the present invention.
6 is a cross-sectional view showing an upper rotating unit of a submarine drilling system according to an embodiment of the present invention.
7 to 9 are views for explaining the operation of the bottom rotation unit and the upper rotation unit of the submarine drilling system according to the embodiment of the present invention, wherein the bottom rotation unit and the upper rotation unit are shown as one figure, A plan view of the rotating unit, and a bottom view of the upper rotating unit.
10 is a perspective view illustrating a drill drive of a subsea drilling system according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the following embodiments can be modified into various other forms, and the scope of the present invention is not limited to the following embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram illustrating a subsea drilling system according to one embodiment of the present invention.

1, a submarine drilling system 10 according to one embodiment of the present invention includes a main body 300, a pipe magazine 100.200, a racking arm 400, and a drilling drive 600).

As shown in FIGS. 1 and 2, the main body 300 is installed in a BOP (Blow-Out Preventer) 20 of a seabed, has an installation space 310 for maintaining airtightness inside, The well center 330 is formed in the well 320 and the well center 330 is connected to the well of the seabed via the BOP 20.

The BOP 20 is installed on the seabed, and a well head connector 21 for connecting to a well is provided at the bottom, and gas, oil or seawater in the ground is raised into the atmosphere with strong force The annular type is installed at the uppermost part of the BOP stack, and the ram type is provided at the upper part of the BOP stack, In case of a kick phenomenon in which underground oil, gas or seawater flows into the well during the drilling operation, the apnea type operates firstly, and when the failure occurs, Activate the type. The ram type may be, for example, a blind ram, a pipe ram, or a shear ram 22, and may be connected to the second or third stage. The shear ram 22 is blown out to cut the pipe for safety of the drill ship in an extremely dangerous state. The BOP 20 may be provided with a valve 23 for opening and closing the supply and discharge of the mud between the shear rams 22.

The pipe magazines 100 and 200 are installed in the installation space 310 so that a plurality of pipes 1 necessary for drilling can be stacked. And may include an upper rotation unit 200 having a bottom rotation unit 100 and multiple second rotation partitions 210 and 6 and shown in FIG. Can be selectively loaded into or unloaded from among the multiple first rotary partitions 110 and multiple second rotary partitions 210 by the locking arm 400. [ Also, the bottom rotation unit 100 and the upper rotation unit 200 may have the same structure as that of the present embodiment, and may be installed so as to face each other up and down. In addition, instead of this, the pipe 1 may be used to load a plurality of, for example three, pipe stands connected. Thus, the pipe 1 can be made of a single body or can be used in place of a plurality of pipe stands.

3 to 5, the bottom rotation unit 100 includes a first rotation partition 110 mounted on the periphery of a plurality of pipes 1 such that the first rotation partition 110 is arranged in a circle, for example, A first rotation driving part 130 for rotating the first rotation partition 110 and a second rotation part 130 for rotating the first rotation partitions 110 are formed on the side of the first rotation partition 110, May be provided. The first rotating partition walls 110 are provided in multiple so that each of the first rotating partition walls 110 latches the pipe 1 located in the first rotating partition wall 110 located inside the first rotating partition wall 110 Which will be described in detail with reference to the operation of the present invention.

The bottom rotation unit 100 may be rotatably installed so that the first rotation partition 110 is concentrically formed on the lower side of the installation space 310. At this time, the first rotating partition wall 110 may be installed such that the first rotating partition wall 110 can rotate relative to each other while keeping the concentric circles through the bearings 111.

The first rotating partition wall 110 may have a first pocket 112 in which a lower end of the pipe 1 is seated and a plurality of first pockets 112 along the inner circumferential surface of the first rotating partition wall 110. A first support groove 113, May be formed on the inner circumferential surface so as to be positioned on the upper side for each first pocket 112. The first pockets 112 may be formed with a plurality of spaced apart portions along the inner circumferential surface of the first rotating partition 110. In addition, the first support grooves 113 may be formed along the inner circumferential surface of the first rotation partition 110 so as to be positioned above the first pockets 112.

The first slit 120 provides a path for installing the pipe 1 in the first rotary partition 110 which is installed in the installation space 310 in multiple rotatable manner, The pipe 1 may be mounted on any one of the first rotating partition walls 110 installed in multiple due to the dimension or structure of the first rotating partition wall 110 or the operation of the rack arm 400, .

The first rotation driving part 130 may include various rotation driving devices for independently rotating each of the first rotation partition walls 110 installed in multiple ways. For example, the first rotation partition wall 110 may have an inner circumference or an outer circumference A first pinion 132 that is gear-coupled to the first gear 131 and a first motor 133 that is installed to rotate the first pinion 132 . Here, the first gear 131 may be formed around the lower end of the first rotating partition 110, for example. The first pinion 132 can be fixed directly to the rotating shaft of the first motor 133. [ The first motor 133 is fixed on the outer side of the first casing 140 to be described later and arranged so as to alternate on both sides of the central portion of the first rotation partition 110 .

The first casing 140 can be installed inside the assembly in which the first rotating partition wall 110 is assembled in multiple and the third slit 141 for the pipe 1 to be taken in and out moves toward the rack arm 400 As shown in Fig. Further, the first casing 140 may be fixed to the lower side of the installation space 310, for example.

The bottom rotation unit 100 may be installed on the base portion 320 as in the present embodiment. Here, the base portion 320 may be formed with a well center 330 for vertically moving the pipe 1 in and out.

6 and 7, the upper rotating unit 200 may be installed on the upper side of the bottom rotating unit 100, and the upper portions of the plurality of pipes 1 may be mounted along the circumference, for example, And a second slit 220 is formed on the side of the second rotation partition 210 to allow the pipe 1 to enter and exit the second slit 220, And a second rotation driving part 230 for rotating the first rotation driving part 210. The second rotary partition 210 is provided in multiple positions so that each of the second rotary partitions 210 latches the pipe 1 located in the second rotary partition 210 located inside Which will be described in detail with reference to the operation of the present invention.

The upper rotation unit 200 may be installed such that the second rotation partitions 210 are rotatable in a plurality of concentric circles on the upper side of the installation space 310 corresponding to the respective first rotation partitions 110. At this time, the second rotary partitions 210 may be installed such that the second rotary partitions 210 can rotate relative to each other while maintaining a concentric state via the bearings 211.

The second rotary partition 210 may include a plurality of second pockets 212 along which the upper end of the pipe 1 is seated and a second support groove 213 through which the side of the pipe 1 is supported. May be formed on the inner circumferential surface so as to be positioned on the lower side for each second pocket 212. Here, the second pockets 212 may be formed at a plurality of intervals along a portion where the step is formed downward along the inner circumferential surface of the second rotary partition 210. The second support grooves 213 may be formed along the inner circumferential surface of the second rotation partition 210 so as to be positioned below the second pockets 212.

The second slits 220 are formed in the second rotary partition 210 so as to provide a path for installing the pipe 1 in the multiple second partition walls 210. The second slits 220 The pipe 1 may be installed in any one of the second rotary partition walls 210 installed in multiple due to the dimension or structure of the second rotary partition wall 210 or the operation of the locking arm 400, Or may be configured to be mounted.

The second rotation driving part 230 may include various rotation driving devices for independently rotating each of the plurality of second rotation partitions 210. For example, the second rotation partitions 210 may have an inner circumference or an outer circumference A second pinion 232 which is gear-coupled to the second gear 231 and a second motor 233 which is provided to rotate the second pinion 232 . Here, the second gear 231 may be formed around the lower end of the second rotation partition 210, for example. And the second pinion 232 can be directly fixed to the rotating shaft of the second motor 233. [ The second motor 233 is fixed on the outer side of the second casing 240 to be described later so that the second motor 233 is arranged so as to alternate on both sides of the center of the second rotation partition 210 .

The first and second motors 133 and 233 of the first and second driving units 130 and 230 can be controlled by a control unit that controls the operation of the system 10. In this case, The rotational positions of the first rotary partition wall 110 and the second rotary partition wall 210 are controlled by controlling the rotation amounts of the first and second motors 133 and 233, It is possible to adjust the positions of the first and second rotary partition walls 110 and 220 such that the first and second rotary partition walls 110 and 220 are aligned with each other, the second slits 220 are aligned with each other, So that the pipe 1 can be loaded or unloaded. The control of the rotation amount of the first and second motors 133 and 233 by the control unit may be performed by using a step motor or a separate encoder as the first and second motors 133 and 233.

The second casing 240 can be installed inside the assembly in which the second rotating partition wall 210 is assembled in multiple and the fourth slit 241 for the pipe 1 to be taken in and out is directed toward the rack arm 400 As shown in Fig. The second casing 240 may be fixed to the upper end of the installation space 310, for example.

As shown in FIG. 7, a third casing 150 may be installed outside the assembly in which the first rotation partition 110 is assembled in multiple. A fifth slit 151 may be formed on the side of the third casing 150 for receiving the pipe 1 from the outside for replenishing the pipe 1 or unloading the pipe 1, A latch 152 (shown in FIG. Further, a fourth casing 250 may be installed on the outer side of the assembly in which the second rotation partition 210 is assembled in multiple. A sixth slit 251 may be formed on the side of the fourth casing 250 for receiving the pipe 1 from the outside for replenishing the pipe 1 and unloading the pipe 1, A latch (not shown) may be installed in the latch 251.

A drill bit, a drill collar, and the like may be stored in the innermost rotary partition wall 110, 210 among the first and second rotary partitions 110, 210.

1 and 2, the racking arm 400 is installed in the installation space 310 to unload the pipe 1 from the pipe magazines 100 and 200. The bottom rotation unit 100 and the upper rotation The unit 1 may be loaded into the unit 200 as well as unloaded. The racking arm 400 loads or unloads the pipe 1 in the lateral direction of the bottom rotation unit 100 and the upper rotation unit 200 to the first rotation partition wall 110 and the second rotation partition wall 210, And may include, for example, an arm body 410 and a grip arm 420.

The arm body 410 may be vertically installed on one side of the bottom rotation unit 100 and the upper rotation unit 200 and is rotated about the vertical direction by the driving force of the motor to be gripped by the grip arm 420 The pipe 1 can be rotated and moved.

The grip arm 420 may be provided on the arm main body 410 with a plurality of vertically spaced apart grippers 421 for gripping the pipe 1 and the upper rotating unit 100. [ For example, a gripper 421 is connected to a plurality of link members 422 arranged vertically, whereby a lead screw for converting the driving force of the motor into a linear motion and a ball screw The gripper 421 can be reciprocated in the horizontal direction by adjusting the distance between the link members 422. [ A separate link member for holding the posture of the gripper 421 is installed between the gripper 421 and the arm body 410 so that the posture of the gripper 421 is always maintained so as to grip the pipe 1 It is possible.

A guide unit 500 may be installed to guide the bottom rotation unit 100 and the pipe 1 mounted on the upper rotation unit 200, as shown in FIG. The guide unit 500 may be fixed to be positioned between the bottom rotation unit 100 and the upper rotation unit 200 and may be installed around the pipe 1 mounted on the bottom rotation unit 100, A fifth slit (not shown) may be formed on the side facing the stacking arm 400. The guide unit 500 may have a ring shape with one side opened by a fifth slit (not shown), for example.

Latches may be provided on the fifth slit of the guide unit 500 and on the third and fourth slits 141 and 241 of the first and second housings 140 and 240, respectively. The latch can be configured such that the pipe 1 can be taken in and out by a force of a predetermined magnitude or more by the racking arm 400 while preventing the pipe 1 from being undesirably detached outwardly.

As shown in Figure 10, the drilling drive 600 is connected to the pipe 1 (shown in Figure 2) from the racking arm 400 (shown in Figure 2) and connected thereto to perform a drilling operation through the BOP 20 For example, a frame 610 vertically installed in an installation space 310 (shown in FIG. 2), a pipe 610 installed on the frame 610 so as to move up and down and gripping the pipe 1 supplied from the racking arm 400, 630 that connects or disassembles the pipe 1 drilled by the top drive 620 and the top drive 620 which allows the pipe to be drilled by the top drive 620, 1) can be connected and disassembled, and the drilling operation can be performed.

The frame 610 may be installed vertically so as to be parallel to the racking arm 400 (shown in Fig. 2) in the installation space 310 (shown in Fig. 2) and vertically movably guides the top drive 620 A sheave 612 supported so that a wire 613 connected to the top drive 620 can be moved up and down by a hydraulic cylinder 611 to drive the top drive 611 by driving the hydraulic cylinder 611, The top drive 620 can be lifted and lowered together with the pipe 1 by the drawwork 614 to which the wire 613 is connected.

The top drive 620 performs a drilling operation by gripping a pipe 1 (shown in FIG. 2) transmitted from the rack arm 400 (shown in FIG. 2) and transmitting rotational force to the pipe 1.

The rough neck 630 may be constructed of, for example, a spinning wrench at the top and a torque wrench at the bottom, the spinning wrench being used to securely engage the pipe 1 (Fig. 2), and the torque wrench is rotated in a direction opposite to the direction in which the upper wrench and the lower wrench are opposed to each other with a strong force for joining the pipe 1 at the final stage, which is difficult to be tightened by the force of the spinning wrench So that the pipe 1 is coupled.

1, an undersea mud circulation system according to an embodiment of the present invention is installed in a BOP (Blow-Out Preventer) of a seabed and has an installation space for maintaining airtightness inside, In a subsea drilling system in which a drilling operation is performed, a mud circulation unit 700 is provided to circulate the mud in the seabed.

The mud circulation unit 100 includes a mud pitting unit 710 installed in the water or the sea so as to be independent from the drilling structure 30 and supplying the mud from the drilling structure 30 to the BOP 20 And further includes a cutting separator 720 for separating cuttings from the mud discharged from the BOP 20 and supplying the cut to the mud fitting portion 710.

The drilling structure 30 may be a rig ship for subsea drilling, a fixed platform, a drillship, or a structure for drilling in the form of a ship or an offshore structure. The drilling structure 30 can also send power and control signals to the mud fitting portion 710 by means of umbilical 711 to automatically adjust the mud required for drilling and to maintain the mud density constant The mud can be sent to the mud fitting portion 710 in order to make it possible.

The submarine drilling system 10 according to the present invention is configured to enable automatic mud circulation at the seabed, while a choke line may be used to control some mud pressure. The mud fitting portion 710 allows the mud to be supplied and discharged between the two shear rams 22 of the BOP 20. In order to control the mud density, a barite may be added by the mud fitting portion 710 or the drilling structure 30 when the density of the mud supplied to the BOP 20 is high, and the BOP 20 ), The premixed mud can be added.

A cutting reservoir 730 may be provided to store the cut separated from the cutting separator 720. The cutting storage unit 730 may store the cut separated from the cutting separator 720 and transfer the cut to the ROV (Remotely-Operated Vehicle), thereby allowing the collected cut to be discharged to the outside.

Meanwhile, the submarine drilling system 10 according to one embodiment of the present invention can be installed on the seabed in a state where the pipe 1 or the like is previously provided in the drilling structure 30 or the ground, Or may be controlled remotely by a control unit provided in the main body 300 or by a controller provided in the main body 300 to perform a predetermined procedure according to a process necessary for drilling.

The operation of the submarine drilling system according to the present invention will now be described. 7 to 9, the bottom rotating unit 100 and the upper rotating unit 200 will be described with reference to one drawing.

7, in order to unload or load the pipe 1 from the first and second rotary partitions 110 and 210 by gripping the pipe 1 with the gripper 421, The partition 110 and the first and third housings 140 and 150 are in a state in which the first slit 120, the third slit 141 and the fifth slit 151 are aligned with each other, And the second and fourth housings 240 and 250 are aligned with the second slit 220, the fourth slit 241 and the sixth slit 251, as shown in FIG. 8, The first and second rotating partition walls 110 and 210 positioned third from the center in the outward direction are rotated clockwise one turn and then the gripper 421 is rotated by the operation of the grip arm 420 to rotate the third and fourth slits The first and second pockets 112 and 212 of the first and second rotating partition walls 110 and 210, which are inserted through the first and second slits 120 and 120, Ping the pipe (1) mounted on the illustrated) and first and second retaining grooves (113 213) in FIG. 6 so that the unloading grip.

As shown in FIG. 9, the first and second rotary partition walls 110 and 210 located second to the outside are rotated clockwise one turn so that the grip arm 420 exposes the pipe 1 exposed thereby, Ping to unload. At this time, the pipe 1 may be latched by a latch (not shown) provided on the third and fourth slits 141 and 241 of the first and second casings 140 and 240. The rotation of the first and second rotary partitions 110 and 210 is an example, and unlike the first and second rotary partitions 110 and 210, the unloading of the pipe 1 can be performed in various rotational directions and in sequence. In addition, each of the first and second rotation barrier ribs 110 and 210 may serve as a latch for the first and second rotation barrier ribs 110 and 210, which are positioned so as to be in contact with the outside of the first and second rotation barrier ribs 110 and 210. The loading on the pipe 1 may follow the reverse order of the order as described above.

According to the present invention, it is possible to accommodate a large number of pipes relative to the same space as in the prior art, thereby providing excellent space utilization and having a multi-wall structure, thereby eliminating the risk of falling of pipes, It is possible to utilize the rotating partition wall of the first embodiment as a latch, thereby eliminating the need for a separate latch, thereby eliminating the structural complexity and the occurrence of drive errors. In addition, since the position of the pipe is changed by the rotating partition wall, the loading or unloading position of the rack can be unified, and the working distance of the rack can be minimized, thereby increasing the driving speed and shortening the handling time of the pipe.

Further, according to the present invention, drilling operation can be performed as close as possible to the oil well, thereby making it possible to solve the limitation on precise position fixation of the drilling structure, to increase the speed and reliability of the drilling operation, Can prevent marine pollution by satisfying marine environment regulations.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. It is.

1: pipe 20: BOP
21: well head connector 22: shear ram
23: valve 30: drilling structure
100: bottom rotating unit 110: first rotating partition
111: bearing 112: first pocket
113: first support groove 120: first slit
130: first rotation driving part 131: first gear
132: first pinion 133: first motor
140: first casing 141: third slit
150: third casing 151: fifth slit
152: Latch 200: Upper rotating unit
210: second rotating partition 211: bearing
212: second pocket 213: second support groove
220: second slit 230: second rotation driving part
231: second gear 232: second pinion
233: second motor 240: second casing
241: fourth slit 250: fourth casing
251: sixth slit 300: main body
310: installation space 320: base portion
330: Well center 400: Racking arm
410: arm body 420: grip arm
421: gripper 422: link member
500: Guide unit 600: Drilling drive
610: Frame 611: Hydraulic cylinder
612: Sheave 613: Wire
614: Drawwork 620: Top Drive
621: Hydraulic cylinder 630: Rough neck
700: mud circulation part 710: mud fitting part
711: Umbilical 720: Cutting separator
730:

Claims (24)

A body installed in a BOP (Blow-Out Preventer) of the seabed and provided with an installation space for maintaining airtightness inside;
A pipe magazine installed in the installation space and loaded with a plurality of pipes required for drilling;
A racking arm installed in the installation space to unload the pipe from the pipe magazine; And
A drilling drive for transferring a pipe from the racking arm and connecting the pipe to drilling through the BOP;
Wherein the submarine drilling system comprises: The method according to claim 1,
The pipe magazine includes:
A first rotary partition mounted on the periphery of the plurality of pipes so as to be arranged along the circumference is installed in multiple from the center to the outer side, a first slit is formed on the side of the first rotary partition for the entry and exit of the pipe, A bottom rotation unit in which a plurality of first rotation driving units for rotating the partition walls are provided; And
A plurality of second rotary partitions installed on the upper side of the bottom rotation unit and mounted such that the upper parts of the plurality of pipes are arranged along the circumference, An upper rotating unit in which a plurality of second rotation driving units for rotating the second rotating partition walls are provided;
Wherein the submarine drilling system comprises: The method of claim 2,
The bottom rotation unit includes:
Wherein the first rotary partition is rotatably installed so as to be concentric with a lower side of the installation space,
The upper rotating unit includes:
Wherein the second rotary partition is rotatably installed in a plurality of concentric circles on the upper side of the installation space corresponding to each of the first rotary partitions. Claim 3
The first rotating partition wall may include a first rotating partition wall,
Wherein a plurality of first pockets on which a lower end of the pipe is seated is formed along the inner circumferential surface and a first support groove on which the side portion of the pipe is supported is formed on the inner circumferential surface so as to be positioned on the upper side for each of the first pockets. The method of claim 2,
The second rotating partition wall may include:
Wherein a plurality of second pockets on which an upper end of the pipe is seated is formed along the inner circumferential surface and a second support groove on which the side portions of the pipe are supported are formed on the inner circumferential surface so as to be positioned on the lower side for each of the second pockets. The method according to any one of claims 2 to 4,
The bottom rotation unit includes:
Further comprising a first casing in which the first rotating partition is installed inside an assembly of multiple assemblies and in which a third slit for allowing the pipe to go in and out is formed on the side facing the racking arm. The method of claim 2,
Wherein the first rotation drive unit includes:
A first gear formed along an inner circumference or an outer circumference of the first rotation partition;
A first pinion gear-coupled to the first gear; And
A first motor installed to rotate the first pinion;
Wherein the submarine drilling system comprises: The method according to any one of claims 2, 3, and 5,
The upper rotating unit includes:
Further comprising a second casing in which the second rotating partition is installed inside an assembly of multiple assemblies and in which a fourth slit for allowing the pipe to enter and exit is formed on the side facing the racking arm. The method of claim 2,
Wherein the second rotation drive unit includes:
A second gear formed along an inner circumference or an outer circumference of the second rotation partition;
A second pinion gear-coupled to the second gear; And
A second motor installed to rotate the second pinion;
Wherein the submarine drilling system comprises: The method of claim 2,
The above-
An arm body provided perpendicularly to an inner side of the bottom rotation unit and the upper rotation unit and rotating about a vertical direction; And
A grip arm which is provided on the arm body at a plurality of intervals at an upper and a lower intervals and in which a gripper for gripping a pipe moves along a radial direction of the bottom rotation unit and the upper rotation unit;
Wherein the submarine drilling system comprises: The method of claim 2,
Further comprising a guide unit disposed between the bottom rotating unit and the upper rotating unit and provided around the pipe stacked on the bottom rotating unit and the fifth rotating unit, the fifth slit being formed on a side of the rack arm facing the rack arm, system. The method according to claim 1,
The pipe magazine includes:
A bottom rotating unit in which a plurality of first rotating partition walls are mounted so that a plurality of pipe bottoms are arranged along the perimeter, and the first rotating partition walls are installed to rotate by the first rotation driving unit; And
A plurality of second rotation partitions mounted on the bottom rotation unit and mounted such that the upper parts of the plurality of pipes are arranged along the periphery and the second rotation partitions are installed to rotate by the second rotation part, An upper rotating unit,
Wherein the pipe is selectively loaded into or unloaded from the multiple first partition walls and the multiple second partition walls by the locking arm. The method of claim 12,
The bottom rotation unit includes:
Wherein the first rotary partition is rotatably installed so as to be concentric with a lower side of the installation space,
The upper rotating unit includes:
Wherein the second rotary partition is rotatably installed in a plurality of concentric circles on the upper side of the installation space corresponding to each of the first rotary partitions. The method according to claim 12 or 13,
Further comprising a guide unit installed to guide the pipes mounted on the bottom rotation unit and the upper rotation unit. The method according to claim 1,
The pipe magazine includes:
A subsea drilling system in which pipes are arranged in a circumferential direction by rotating partition walls formed multiply from the center to the outside. 16. The method of claim 15,
The rotating partition may include:
And a plurality of pockets for seating the pipe on the inner circumferential surface and a plurality of support grooves, respectively. The method according to claim 1,
Wherein the drilling drive comprises:
A frame vertically installed in the installation space;
A top drive installed on the frame so as to move up and down and to grasp and rotate a pipe supplied from the rack; And
A rough neck connecting or disconnecting the pipes drilled by the top drive;
Wherein the submarine drilling system comprises: The method according to claim 1,
And a mud fitting unit installed in the water or the seabed so as to be independent from the drilled structure and supplying the mud from the drilled structure to the BOP. 19. The method of claim 18,
Further comprising a cutting separator for separating the cut from the mud discharged from the BOP and supplying the cut to the mud fitting portion. The method of claim 19,
And a cutting storage unit for storing a cut separated from the cutting separator and delivering the cut to a remotely-operated vehicle (ROV). A main body installed in a BOP (Blow-Out Preventer) of the seabed;
A pipe magazine installed in the main body and loaded with a plurality of pipes; And
And a rack arm for unloading the pipe from the pipe magazine,
A drilling drive for coupling the pipe from the rack key to the drilling drive to perform a drilling operation through the BOP;
Wherein the submarine drilling system comprises: 23. The method of claim 21,
And a mud fitting unit installed in the water or the seabed so as to be independent from the drilled structure and supplying the mud from the drilled structure to the BOP. 23. The method of claim 22,
Further comprising a cutting separator for separating the cut from the mud discharged from the BOP and supplying the cut to the mud fitting portion. 24. The method of claim 23,
And a cutting storage unit for storing a cut separated from the cutting separator and delivering the cut to a remotely-operated vehicle (ROV).

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