KR102132515B1 - Riser Handling System and Oil Prospection offshore rig Including The Same - Google Patents

Abstract

The present invention relates to a riser handling system and a drilling vessel having the same, a gantry crane for transporting a riser stored in a cargo hold; A riser elevator unit which is installed inside the cargo hold, parks a riser carried by a gantry crane, and rises or falls; A catwalk having a trolley which is provided in a pair spaced apart from each other and is modified to narrow the gap between each other to support the front end and the rear end of the riser raised by the riser elevator unit; And it characterized in that it comprises a control unit for synchronizing the movement of the pair of trolleys.

Description

Riser Handling System and Oil Prospection offshore rig Including The Same}

The present invention relates to a riser handling system and a drilling vessel having the same.

In general, subsea drilling can only be sailed by other tugboats, and mainly used by drilling rigs or stationary platforms dedicated to subsea drilling, where mooring devices are used to drill undersea while anchored at a specific point on the sea. However, in recent years, so-called drilling ships (drilling ships, drillships or drilling vessels) manufactured in the same form as ordinary ships have been developed and used in deep-sea drilling so that advanced drilling equipment can be mounted and sailed with its own power.

In order to drill oil or gas existing under the seabed, the center of a rigger equipped with various drilling equipment, a fixed platform, or a drillship (hereinafter referred to as a drilling ship) is equipped with oil or gas existing under the seabed. A moonpool is formed so that a riser or drill pipe for drilling can be moved up and down, and the operator moves the riser and the drill pipe downward through the moonpool formed in the center of the drilling vessel, Drilling seabed resources stored in wells located on rocks beneath the sea bed.

The riser is a member that advances to the bottom of the seabed before advancing the drill pipe to the well, protecting the drill pipe while preventing the drilling mud from being exposed to seawater. When the riser is installed, the drill pipe is advanced downward through the subsea stratum to the well into the riser.

In this way, when the riser is advanced to the bottom of the seabed or when the drill pipe is advanced to the well, the riser or drill pipe connected to a long length is not advanced downward, but a riser or drill pipe of a short length is connected to each other to advance downward. A blowout preventer (BOP) is installed at the bottom of the seabed to prevent abnormal high-pressure oil or gas from rising up on the drill pipe and riser. After fixing the casing by cement in the subsea layer, the drill pipe equipped with a drill bit is inserted into the casing to drill the seabed. A mud is inserted into the drill pipe to prevent the drill bit from overheating due to the heat generated when the drill bit penetrates the ground and to lubricate and make drilling easier. When the drilling operation is finished, the riser is transported to the drill floor through the door pool, dismantled, and then transported to the loading site.

The riser loaded in the cargo hold is transported to the drill floor where the derrick is located using a riser handling system for drilling, as described with reference to FIGS. 1 and 2.

1 is a partial cross-sectional view of a drilling line for explaining a conventional riser handling system, and FIG. 2 is a partial cross-sectional view of a drilling line for explaining a conventional riser handling system.

1 and 2, the riser handling system 100, the drill ship (1) for transporting the riser 11 loaded inside the cargo hold 110 to the drill floor (not shown) where the derrick is located It is installed in.

The riser handling system 100 is installed between the cargo hold 110 for storing and storing the riser 11 between the plurality of riser racks 111 and the riser rack 111 inside the cargo hold 110, and the riser 11 Parking position (120) to wait to transfer to the outside, gantry crane (130) for lifting the riser (11) loaded in the interior of the cargo hold (110) one by one to the parking position (120), Located on the vertical upper part of the parking position 120 and installed outside the cargo hold 110, the riser 11 in the parking position 120 is formed on the upper surface of the cover structure 112 forming the upper part of the cargo hold 110. Catwalk (Lift Elevation System 150) lifting the outside of the cargo hold (110) through the opening (113) and the riser (11) lifted by the Riser Elevation System (150) are supplied to the catwalk to transfer to the drill floor where the derrick is located ( 170) and a top drive (not shown) for vertically lifting the riser 11 conveyed by the catwalk 170.

In the above, the riser elevation system 150 is supported by the support structure 140 so as to be located in the vertical upper portion of the parking position 120, is installed outside the cargo hold 110, and is spaced by the length of the riser 11 A pair of support frames 151 spaced apart from each other and installed on the support structure 140, a sliding frame 152 installed to be slidable in the horizontal direction on the support frame 151, and a sliding frame 152 It is installed in a winch 153 for lifting the riser 11, and comprises a riser clamp 154 to clamp and lift the riser 11 located in the parking position 120 by the winch 153.

The catwalk 170 is installed so as to be movable on the catwalk guide unit 160 installed to protrude on one side of the support structure 140 adjacent to the riser elevation system 150 and supplied from the riser elevation system 150. It comprises a riser 11 of the bogie-type riser feeding machine 171 for transporting the riser 11 to the drill floor.

On the other hand, it is very important to efficiently and quickly transfer the riser 11 from the cargo hold 110 to the drill floor because the drilling ship 1 needs to install a number of risers 11 on the seabed.

However, the conventional riser handling system 100 is a structure in which the riser 11 needs to be transferred from the riser elevation system 150 to the catwalk 170, so the transportation process is complicated and time-consuming, as well as the cargo hold 110 The riser 11 of the need to be lifted using a winch 153 and a riser clamp 154, and in the process of supplying the lifted riser 11 to the catwalk 170, the riser 11 is likely to swing and work This is difficult, there is a high risk of safety accidents and there is a problem that the drilling efficiency is reduced.

In addition, in the conventional riser handling system 100, since the riser elevation system 150 must be essentially configured on the upper part of the cargo hold 110, the riser elevation system 150 occupies a large portion of the deck, so that the drilling ship 1 There is a problem in that the space utilization of the machine decreases and a safety accident occurs when handling the riser with a crane.

In addition, the riser elevation system 150 lifts the riser 11, such as the support frame 151, the sliding frame 152, the winch 153, the riser clamp 154, from the cargo hold 110 to the catwalk 170. Since it has to be made of various necessary components, there is no choice but to increase the number of installation steps, and there is a problem in that it takes a lot of production cost.

Domestic Registered Patent Publication No. 10-1299814 (Announcement date: August 19, 2013)

The present invention was created to solve the problems of the prior art as described above, and the object of the present invention is to safely and quickly transfer the riser from the cargo hold to the drill floor where the derrick is located, and requires a lot of installation space and installation effort. It is to provide a riser handling system that does not require the installation of an existing riser elevation system and a drilling vessel equipped with the same.

Riser handling system according to an aspect of the present invention, a gantry crane for transporting the riser stored in the cargo hold; A riser elevator unit installed inside the cargo hold to park and rise or fall the riser carried by a gantry crane; A catwalk having a trolley which is provided in a pair spaced apart from each other and is modified to narrow the gap between each other to support the front end and the rear end of the riser raised by the riser elevator unit; And it characterized in that it comprises a control unit for synchronizing the movement of the pair of trolleys.

Specifically, the control unit may control the position, moving speed, and moving direction of the pair of trolleys according to the preset position information of the riser.

Specifically, the riser elevator unit, a power supply unit that is installed on the bottom of the cargo hold; It is installed between the riser rack in the cargo hold, the lifting portion rising to the upper portion of the catwalk by the operation of the power supply; And it is installed on the upper end of the lifting portion, it may include a parking portion for seating the riser carried by the gantry crane.

Specifically, it is formed on the upper part of the cargo hold, and further includes a pair of support structures that are vertically installed on both sides of the opening that is the exit passage of the riser, and the support structure guides the rise or fall of the riser elevator part. , It can support the catwalk guide portion for guiding the movement of the catwalk.

Specifically, the catwalk guide part is installed at the upper end of the support structure and extends to the drill floor, and may have a riser through hole having a size through which the riser penetrates when the riser elevator part rises.

Specifically, if it is determined that the riser is mounted on the riser elevator part and before it rises above the catwalk through the riser through hole, the control unit controls one trolley from among the pair of trolleys to be located in the front side. When it is determined that the other trolley is positioned at the rear, and the riser is loaded on the riser elevator part and rises above the catwalk through the riser through-hole, when either side of the riser is seated, Control to move backward to the other, and control the other trolley to move forward until the other side of the riser is seated, and if it is determined that the riser is seated by the pair of trolleys, the pair of trolleys Is controlled to simultaneously move forward until reaching the drill floor, and when the riser transferred to the drill floor is lifted by a top drive and it is determined that the pair of trolleys do not have the riser, the pair of trolleys is initially It can be controlled to simultaneously move backwards until it reaches the position.

A drilling vessel according to another aspect of the invention is characterized by including the riser handling system described above.

The riser handling system according to the present invention and a drilling line equipped with the same, by installing a riser elevator part for parking and elevating the riser between the riser racks inside the cargo hold, it is unnecessary to install an existing riser elevation system and an existing parking position, and thus a drilling line It can increase the space utilization of, and can reduce the installation effort and manufacturing cost.

In addition, the riser handling system according to the present invention and the drilling line equipped with the same, by installing the catwalk vertically parallel to the riser elevator part, by installing the riser elevator part and the catwalk at a position corresponding to the drilling center in the width direction of the cargo hold, Not only can the entire transfer process of the riser be reduced from the cargo hold to the drill floor where the derrick is located, it can also improve the efficiency of transfer work and prevent the risk of safety accidents.

1 is a partial longitudinal sectional view of a drilling line for explaining a conventional riser handling system.
2 is a partial cross-sectional view of a drilling line for explaining a conventional riser handling system.
3 is a partial longitudinal sectional view of a drilling line for explaining a riser handling system according to a first embodiment of the present invention.
4 is a partial cross-sectional view of a drilling line for explaining a riser handling system according to a first embodiment of the present invention.
5 is a partial longitudinal cross-sectional view of a drilling line for explaining a riser handling system according to a second embodiment of the present invention.
6 is a partial cross-sectional view of a drilling line for explaining a riser handling system according to a second embodiment of the present invention.
7 is a longitudinal cross-sectional view of a lift in a riser elevator unit according to a first or second embodiment of the present invention.
8 is a plan view of the catwalk guide part in the riser handling system according to the first or second embodiment of the present invention.
9 is a plan view of a riser feeding machine in a riser handling system according to a first embodiment of the present invention.

The 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 addition, it should be noted that, in addition to reference numerals to the components of each drawing in the present specification, the same components have the same numbers as possible, even if they are displayed on different drawings. In addition, in the description of the present invention, when it is determined that detailed descriptions of related known technologies may unnecessarily obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a partial cross-sectional view of a drilling line for explaining a riser handling system according to a first embodiment of the present invention, and FIG. 4 is a partial cross-sectional view of a drilling line for explaining a riser handling system according to a first embodiment of the present invention , Figure 7 is a longitudinal cross-sectional view of the elevator in the riser elevator unit according to the first embodiment of the present invention, Figure 8 is a plan view of the catwalk guide unit in the riser handling system according to the first embodiment of the present invention, Figure 9 is the present invention A top view of a riser feeding machine in a riser handling system according to a first embodiment of the.

3, 4, 7 to 9, the riser handling system 200 according to the first embodiment of the present invention, the derrick is located on the riser 21 loaded inside the cargo hold 210 It is installed on the drilling ship 2 for transporting to a drill floor (not shown), cargo hold 210, gantry crane 230, support structure 240, riser elevator part 250, catwalk guide part 260 , It may be configured to include a catwalk (270).

In the above, it is revealed that the drilling ship 2 is used in a sense including a marine structure or a ship on which a riser handling system 200 is installed for drilling operations such as a rig ship, a fixed platform, and a drill ship. Put it.

The cargo hold 210 may be a riser hold that loads and stores a plurality of risers 21.

The cargo hold 210 may be made of a space having a certain depth in the inner direction of the upper deck of the drilling ship 2, and a plurality of riser racks 211 inside to store and store a plurality of risers 21 in an aligned state ) Can be installed.

The cargo hold 210 may further include a cover structure 212 covering the upper portion to protect the loaded riser 21.

The cover structure 212 may be provided separately or may be formed by extending the upper deck.

On the upper portion of the cover structure 212, an opening 213 that serves as a draw-out passage when transporting the riser 21 from the cargo hold 210 to the catwalk 270 to be described later using the riser elevator section 250 to be described later. ) May be formed. Here, the opening 213 may be formed in a structure that can be opened or closed or opened.

The gantry crane 230 lifts the riser 21 loaded inside the cargo hold 210 so that it can be transferred to the parking portion 253 of the riser elevator part 250, which will be described later, so that the riser of the cargo hold 210 is It may be installed on the inner upper side of the cover structure 212 forming the upper portion of the cargo hold 210 at a position spaced a certain distance from the rack 211 upward.

The gantry crane 230, although not indicated by reference numerals, the gantry frame is installed to be movable in the horizontal direction inside the cargo hold 210, a winch installed at both ends of the gantry frame, and is connected to the winch of the winch In operation, it may be configured to include a riser gripper that moves in the vertical direction and grips both ends of the riser 21 to transfer the riser 21 to the riser elevator 250 to be described later.

The support structure 240 may be installed in the vertical direction on the cover structures 240 on both sides of the opening 213 formed in the cargo hold 210.

The pair of support structures 240 may guide the rise or fall of the riser elevator unit 250, which will be described later, and can support the catwalk guide unit 260 and the catwalk 270, which will be described later, installed on the upper end. have.

In contrast to the support structure 240 of this embodiment and the existing support structure 140, the support structure 240 of this embodiment is installed at a position corresponding to the drilling center CL in the width direction of the cargo hold 210 While the riser elevator unit 250, the catwalk guide unit 260, and the catwalk 270, which will be described later, are installed at the same location, the existing support structure 140 is provided to the drilling center CL in the width direction of the cargo hold 110. It is different from the existing catwalk guide parts 160 and catwalk 170 installed at corresponding positions, that is, installed at positions spaced apart from one another by a distance from the drilling center CL.

The riser elevator unit 250 may be installed between the riser rack 211 inside the cargo hold 210 at a position corresponding to the drilling center CL in the width direction of the cargo hold 210, and may be installed on the gantry crane 230. The riser 21 to be transported can be parked, and the parked riser 21 can be raised to the catwalk 270, which will be described later.

In addition, since the riser elevator unit 250 must penetrate the catwalk 260 to be described later in order to seat the riser 21 on the front trolley 272 to be described later and the rear trolley 273 to be described later, its size is at least. It should be smaller than the size of the riser 21.

The riser elevator unit 250 may include a power supply unit 251, a lifting unit 252, and a parking unit 253.

The power supply unit 251 may be installed on the floor of the cargo hold 210 at a position corresponding to the drilling center CL in the width direction of the cargo hold 210, and may operate the elevator 252 to be described later.

When the riser 21 is seated on the parking portion 253 to be described later, the power supply unit 251 may be automatically or manually operated to raise the elevation unit 252 to be described later.

The lifting part 252 may be installed between the riser rack 211 inside the cargo hold 210, and through the catwalk 270 to be described later by the operation of the power supply unit 251 to the upper part of the catwalk 270. Can rise. A parking portion 253, which will be described later, may be installed at the top of the lifting portion 252.

The lifting unit 252 may be a scissor lift, as shown in FIG. 7, and may include a fixed frame 252a, a lifting frame 252b, a telescopic frame 252c, and a scissor-bar 252d. When the lift 252 is a scissor lift, the power supply 251 may be a hydraulic cylinder.

The fixed frame 252a may be connected to the power supply unit 251, and may fix the lifting frame 252b and the lower end of the telescopic frame 252c.

The lifting frame 252b may be connected to a parking portion 253 to be described later on the upper portion, and fixed to the upper ends of the lifting frame 252b and the telescopic frame 252c so that the scissor-bar 252d is parked according to the elevation. You can go up and down with (253).

The telescopic frame 252c, the lower end is fixedly installed on both sides of the fixed frame 252a, the upper end can be fixedly installed on both sides of the lifting frame 252b, and the length when the scissor-bar 252d is elevated Can be adjusted. The telescopic frame 252c may be a triple guide telescopic frame.

Caesars-bar 252d, the lower portion is fixedly installed on the fixed frame 252a, the upper portion can be fixedly installed on the lifting frame 252b, and raised by the power supply 251 while lifting the lifting frame 252b Or you can descend.

The parking portion 253 may be installed on the top of the lifting portion 252, for example, on the top of the lifting frame 252b, and have a structure capable of seating the riser 21 conveyed by the gantry crane 230. , For example, the upper surface may be formed in a hemispherical shape corresponding to the shape of the riser 21.

In this embodiment, the case where the riser elevator unit 250 is a scissor type lift, but is not limited thereto, and is a lift capable of lifting the riser 21 to a catwalk 270 to be described later, such as a hydraulic lift or a gear type lift, etc. All are applicable.

Through this embodiment, the riser elevator unit 250 is installed at a position corresponding to the drilling center CL in the width direction of the cargo hold 210 together with the catwalk 270, which will be described later, so that the derrick from the cargo hold 210 is provided. The horizontal movement of the riser 21 to the located drill floor is minimized, which not only reduces the entire transfer process of the riser 21, but also improves the efficiency of transport work and prevents the risk of safety accidents, and the gantry crane 230 It is possible to park the riser 21 moved by, it can perform the role of the existing parking position 120, the parked riser 21 can be elevated to the catwalk 260 to be described later, the existing riser The role of the elevation system 150 may be performed.

The catwalk guide part 260 is installed at the upper end of the support structure 240, is positioned vertically parallel to the riser elevator part 250, horizontally parallel to the drill floor, and in the width direction of the cargo hold 210. It may be installed at a position corresponding to the drilling center (CL), and may have a structure through which the riser elevator part 250 in the parked riser 21 penetrates.

The catwalk guide part 260 may extend from the support structure 240 to the drill floor so that the catwalk 270, which will be described later, can move from the cargo hold 210 to the drill floor, and includes a first plate 261 and a first riser. It may be configured to include a through-hole 262, the first rail 263. In this embodiment, although the catwalk guide part 260 includes the first rail 263, it is needless to say that the configuration without the first rail 263 may also be included.

The first plate 261 may be installed at an upper end portion of the support structure 240 and extend to the drill floor so that the catwalk 270, which will be described later, can move to the drill floor and provide a movement path for the operator. .

In the first plate 261, a first riser through-hole 262 to be described later may be formed in a part, and a first rail 263 to be described later in the longitudinal direction may be formed on the upper portion.

The first riser through-hole 262 may be formed in a portion of the first plate 261 so that the riser elevator part 250 in the parked state of the riser 21 has a size capable of penetrating at least. It may be positioned parallel to the vertical portion 250.

The first rail 263 may be formed in a longitudinal direction along the vicinity of both upper edges of the first plate 261, and the riser feeding machine 271, which will be described later, can move from the cargo hold 210 to the drill floor. Can provide.

The catwalk 270 is installed vertically and parallel to the riser elevator part 250 on the catwalk guide part 260, but may be installed at a position corresponding to the drilling center CL in the width direction of the cargo hold 210.

In addition, since the catwalk 270 is installed vertically parallel to the riser elevator part 250, the upper portion of the riser elevator part 250 in the parked state of the riser 21 is vertically raised so that the upper part can be penetrated. Can be.

The catwalk 270 is supplied with a riser 21 from the riser elevator unit 250 so that it can be transferred to a drill floor where a derrick is located, a riser feeding machine 271, a front trolley 272, and a rear trolley 273. It may be configured to include.

The riser feeding machine 271 is a catwalk guide unit 260 to transfer the riser 21 supported by the front trolley 272 to be described later and the rear trolley 273 to be described later from the cargo hold 210 to the drill floor. It can be installed on the moveable, may have a structure through which the riser 21 is parked riser elevator unit 250, the front bogie 271a, the rear bogie 271b, the second plate ( 271c), a second riser through hole 271d, a second rail 271e, and a stopper 271f.

The front bogie 271a and the rear bogie 271b may be moved along the first rail 263 and risers through a second riser through-hole 271d to be described later formed on a second plate 271c to be described later. The riser elevator unit 250 in the parked state 21 may be disposed to be spaced at least more than the length of the riser 21 so as to penetrate therethrough.

The second plate 271c is installed in the longitudinal direction from the top of the front bogie 271a to the top of the rear bogie 271b to connect the front bogie 271a and the rear bogie 271b, and the riser 21 It can provide the installation space of the front trolley 272 to be described later and the rear trolley 273 to be described later.

In the second plate 271c, a second riser through hole 271d, which will be described later, may be formed in a part, and a second rail 271e, which will be described later in the longitudinal direction, may be formed on the upper portion.

The second riser through-hole 271d may be formed on a portion of the second plate 271c so that the riser elevator part 250 in the parked state of the riser 21 has a size capable of penetrating at least. It may be positioned parallel to the vertical portion 250. The size and shape of the second riser through-hole 271d may be the same or similar to the size and shape of the first riser through-hole 262.

The second rail 271e may be formed in the longitudinal direction along the vicinity of both upper edges of the second plate 271c, and is raised on the riser elevator part 250 through the second riser through-hole 271d ( In order to safely support 21), a front trolley 272 to be described later and a rear trolley 273 to be described later can provide a track that can be moved back and forth.

The stopper 271f may be installed at both ends of the second rail 271e, and serves to prevent the front trolley 272 to be described later and the rear trolley 273 to be described later from being separated from the second rail 271e. can do.

The front trolley 272 is disposed in front of the second plate 271c based on the second riser through hole 271d of the riser feeding machine 271 and can be moved along the second rail 271e.

The front trolley 272 may be configured to seat and support one side of the riser 21, and the riser 21 is carried on the riser elevator unit 250, and the first riser through hole of the catwalk guide unit 260 (262) and riser through the second riser through-hole 271d of the riser feeding machine 271, it can move toward the second riser through-hole 271d to securely support one side of the riser 21.

The rear trolley 273 is disposed behind the second plate 271c based on the second riser through-hole 271d of the riser feeding machine 271 and can be moved along the second rail 271e.

The rear trolley 273 and the riser 21 may be configured to seat and support the other side, and the riser 21 is carried on the riser elevator unit 250 and the first riser through hole of the catwalk guide unit 260 ( 262) and rising through the second riser through-hole 271d of the riser feeding machine 271, it can move toward the second riser through-hole 271d to safely seat and support the other side of the riser 21.

The front trolley 272 and the rear trolley 273 may be provided as a pair spaced apart from each other on the riser feeding machine 271, and are deformed to narrow the gap between each other, thereby being made by the riser elevator unit 250. The front and rear ends of the riser 21 penetrating the first and second riser through holes 262 and 271d may be seated and supported.

In addition, the front trolley 272 and rear trolley 273 described above may be coupled to the riser feeding machine 271 when deformed to support the riser 21.

In addition, the above-described front trolley 272 and rear trolley 273 are separated from the riser feeding machine 271, so that the distance between each other is increased so that the riser 21 can pass through the first and second riser through holes 262 and 271d. It can be made to penetrate.

In addition, the front trolley 272 and the rear trolley 273 may be configured identically or similarly, but vertically lift the riser 21 transferred to the drill floor by the catwalk 270 using a top drive. When raising, it may be desirable to configure the rear trolley 273 to be tiltable so as to support the rear portion of the riser 21.

The catwalk 270 configured as described above may maintain a state in which the riser feeding machine 271 and the pair of trolleys 272 and 273 are integrally coupled when the riser 21 is transported.

The drilling line 2 provided with the riser handling system 200 according to the present embodiment described above, compared to the drilling line 1 provided with the existing riser handling system 100, from the cargo hold 210 to the drill floor riser ( 21) can be effectively and quickly transferred, and the riser 21 transfer process using the riser handling system 200 according to an embodiment of the present invention will be described as follows.

The riser 21 loaded and stored between the riser racks 211 is first moved upward by the gantry crane 230, and the riser 21 first moved upward by the gantry crane 230 is raised by the gantry crane 230. ) The first horizontally moved to the upper part of the parking portion 253, and the first horizontally moved riser 21 penetrates the catwalk guide part 260 and the catwalk 270 by the riser elevator part 250, and the catwalk ( The second riser is moved up to the upper portion of 270), and the second riser is moved to the drill floor by the riser feeding machine 271 while being supported by the front trolley 272 and the rear trolley 273. It is moved horizontally.

The riser handling system 200 of the present embodiment described above is a catwalk 270 in which the riser 21 moved to the riser elevator unit 250 by the gantry crane 230 is moved by the riser elevator unit 250 once. On the other hand, the existing riser handling system 200 is the riser 11 moved to the parking position 120 by the gantry crane 230, the riser, the horizontal movement, the downward movement by the riser elevation system 150 Since it can be placed on the catwalk 170 through three movement processes, it is possible to omit the two-step transfer process of horizontal movement and descending movement.

5 is a partial longitudinal sectional view of a drilling line for explaining a riser handling system according to a second embodiment of the present invention, and FIG. 6 is a partial cross-sectional view of a drilling line for explaining a riser handling system according to a second embodiment of the present invention , FIG. 7 is a longitudinal cross-sectional view of a lift unit in a riser elevator unit according to a second embodiment of the present invention, and FIG. 8 is a plan view of a catwalk guide unit in a riser handling system according to a second embodiment of the present invention.

5 to 8, the riser handling system 300 according to the second embodiment of the present invention, a drill floor (not shown) on the riser 21 loaded in the cargo hold 210 is located in the derrick ) To be installed on the drilling vessel 3 to be transported, the cargo hold 210, the gantry crane 230, the supporting structure 240, the riser elevator part 250, the catwalk guide part 360, the catwalk 370, It may be configured to include a control unit 380.

In the second embodiment of the present invention, the catwalk guide part 360, the catwalk 370, the cargo hold 210 except for the control part 380, the gantry crane 230, the support structure 240, the riser elevator part 250 The same reference numerals are used for the same components in the riser handling system 200 of the first embodiment of the present invention to be described above, and accordingly, detailed description of each of the same components is omitted here to avoid duplication of the description. The catwalk guide unit 360, the catwalk 370, and the control unit 380, which are different components from the first embodiment of the present invention, will be described only for the parts different from the catwalk guide unit 360.

The catwalk guide part 360 is installed at the upper end of the support structure 240, but is positioned vertically parallel to the riser elevator part 250, horizontally parallel to the drill floor, and in the width direction of the cargo hold 210. It may be installed at a position corresponding to the drilling center (CL), and may have a structure through which the riser elevator part 250 in the parked riser 21 penetrates.

The catwalk guide part 360 extends from the support structure 240 to the drill floor so that the catwalk 370 composed of the front trolley 372 and the rear trolley 373, which will be described later, can move from the cargo hold 210 to the drill floor. It may be, and may be configured to include a plate 361, riser through-hole 362, rail 363.

The plate 361, the riser through-hole 362, and the rail 363 constituting the catwalk guide portion 360 are each of the first plate 261 and the first plate constituting the catwalk guide portion 260 of the first embodiment. 1 Riser through hole 262, the same as each of the first rail 263, but not the riser feeding machine 271 constituting the catwalk 270 of the first embodiment, but the front trolley constituting the catwalk 370 to be described later It is different that the 372 and the rear trolley 373 are moved. Therefore, a detailed description of the catwalk guide unit 360 will be omitted here to avoid duplicate description.

The catwalk 370 is installed vertically and parallel to the riser elevator part 250 on the catwalk guide part 360, but may be installed at a position corresponding to the drilling center CL in the width direction of the cargo hold 210. It may be configured to include a front trolley 372 and a rear trolley 373 to receive the riser 21 from the riser elevator unit 250 and transfer it to the drill floor where the derrick is located.

In the catwalk 370 of the second embodiment, compared to the catwalk 270 of the first embodiment described above, the configuration of the riser feeding machine 271 is omitted, and the front trolley 372 and the rear trolley 373 are the first. The difference is that it is configured to simultaneously perform the role of the riser feeding machine 271 of the embodiment.

The front trolley 372 is disposed in front of the plate 361 based on the riser through-hole 362 of the catwalk guide part 360 and can be moved along the rail 363, and the rear trolley 373 described later. The movement of the riser 21 may be controlled by a control unit 380 to be described later in order to transfer it to the drill floor after being seated in synchronization with.

The front trolley 372 may be configured to seat and support one side of the riser 21, and the riser 21 is carried on the riser elevator unit 250 to riser through-hole 362 of the catwalk guide unit 360 ), it moves to the riser through-hole 362 by the control unit 380 to seat and support one side of the riser 21, and moves to the drill floor together with the rear trolley 373, which will be described later.

The rear trolley 373 is disposed at the rear of the plate 361 based on the riser through-hole 362 of the catwalk guide part 360 and can be moved along the rail 363 and synchronized with the front trolley 372. By mounting the riser 21, the movement can be controlled by a control unit 380, which will be described later, to transfer it to the drill floor.

The rear trolley 373 may be configured to seat and support the other side of the riser 21, and the riser 21 is carried on the riser elevator unit 250 and the riser through hole 362 of the catwalk guide unit 360 is mounted. When it rises through, it moves to the riser through-hole 362 by the control unit 380 to safely seat and support the other side of the riser 21, and moves to the drill floor together with the front trolley 372.

The front trolley 372 and the rear trolley 373 may be provided as a pair spaced apart from each other, shearing the riser 21 raised by the riser elevator unit 250 by being deformed so that the distance between them is narrow. With the role of seating and supporting the rear end and the riser 21 that is seated and supported as a drill floor, it can simultaneously perform the role of a riser feeding machine, and after completing the transfer of the riser 21, the distance between each other increases. To allow the riser 21 to penetrate the riser through hole 362 of the catwalk guide part 360, since it operates individually, it will be described later in order to secure the seating support of the riser 21 and the transfer to the drill floor. It is necessary to synchronize movements by the control unit 380, which will be described in detail below.

The control unit 380 may control the position, moving speed, and moving direction of the front trolley 372 and the rear trolley 373 according to the preset position information of the riser 21.

Specifically, the control unit 380, by recognizing the position information of the riser 21, the riser 21 is carried on the riser elevator unit 250 and rises upward through the riser through hole 362 of the catwalk guide unit 360 If it is determined that it is before coming, the front trolley 372 is controlled to be positioned in front of the plate 361, and the rear trolley 373 is controlled to be positioned behind the plate 361 to control the front trolley 372 and the rear trolley. (373) can be arranged at a sufficient distance from each other.

When the control unit 380 determines that the riser 21 is loaded on the riser elevator unit 250 by the location information and rises upward through the riser through hole 362 of the catwalk guide unit 360, the control unit 380 is in front of the plate 361. The front trolley 372 located at the control to move backward until one side of the riser 21 is seated, and the rear side trolley 373 located at the rear of the plate 361 is moved to the other side of the riser 21. By controlling to move forward until it is seated and supported, the front trolley 372 and the rear trolley 373 can be deformed so that the distance between them is narrow.

If the control unit 380 determines that the riser 21 is safely seated and supported by the front trolley 372 and the rear trolley 373 based on the location information, the control unit 380 places the front trolley 372 and the rear trolley 373 on the drill floor. It can be controlled to move forward simultaneously until it arrives. At this time, the control unit 380 may control the moving speeds of the front trolley 372 and the rear trolley 373 to be the same so as to prevent the riser 21 from being detached.

If the control unit 380 determines that there is no riser 21 in the front trolley 372 and the rear trolley 373 because the riser 21 transferred to the drill floor by the location information is lifted by the top drive, the front trolley 372 ) And the rear trolley 373 can be controlled to simultaneously move backwards until they reach the initial position.

The control unit 380 repeatedly performs the above process of controlling the front trolley 372 and the rear trolley 373, so that the riser 21 can be continuously transferred from the cargo hold 210 to the drill floor.

As described above, in the present exemplary embodiment, the riser elevator unit 250 for parking and elevating the riser 21 is installed between the riser racks 211 inside the cargo hold 210, so that the existing riser elevation system 150 and the existing riser are installed. Since the installation of the parking position 120 is unnecessary, it is possible to increase the space utilization of the drilling ships 2 and 3, and to reduce the installation man-hour and manufacturing cost.

In addition, in the present embodiment, the catwalks (270, 370) are vertically and parallelly installed with the riser elevator part 250, but the riser elevator parts 250 and the catwalk (270, 370) are arranged in the width direction of the cargo hold 210. By installing in a position corresponding to the drilling center (CL), it is possible to reduce the entire transfer process of the riser 21 from the cargo hold 210 to the drill floor where the derrick is located, as well as improve the efficiency of transfer work and prevent the risk of safety accidents can do.

In the above, the present invention has been described based on the embodiments of the present invention, but this is merely an example and does not limit the present invention, and those skilled in the art to which the present invention pertains will not depart from the essential technical content of the present embodiment. It will be appreciated that various combinations or variations and applications not illustrated in the examples are possible in the scope. Accordingly, technical contents related to modifications and applications that can be easily derived from the embodiments of the present invention should be interpreted as being included in the present invention.

1, 2, 3: Drilling line 11, 21: Riser
100, 200, 300: riser handling system 110, 210: cargo hold
111, 211: riser rack 112, 212: cover structure
113, 213: opening 120: parking position
130, 230: gantry crane 140, 240: support structure
150: riser elevation system 151: support frame
152: sliding frame 153: winch
154: riser clamp 250: riser elevator section
251: power supply unit 252: lifting unit
252a: Fixed frame 252b: Lifting frame
252c: Telescopic frame 252d: Caesars-Bar
253: parking section 160, 260, 360: catwalk guide section
261, 361: plate 262, 362: riser through hole
263, 363: rail 170, 270, 370: catwalk
171, 271: riser feeding machine 271a: front bogie
271b: rear bogie 271c: plate
271d: riser through hole 271e: rail
271f: Stopper 272, 372: Front trolley
273, 373: rear trolley 380: control
CL: Drilling center

Claims (7)

A gantry crane for transporting the riser stored in the cargo hold;
A riser elevator unit installed inside the cargo hold to park and rise or fall the riser carried by a gantry crane;
Catwalk having a trolley which is provided in a pair spaced apart from each other, and is modified to narrow the gap between each other to support the front and rear ends of the riser raised by the riser elevator unit; And
And a control unit synchronizing the movement of the pair of trolleys. The method of claim 1, wherein the control unit,
Riser handling system, characterized in that for controlling the position, the moving speed, the moving direction of the pair of trolleys according to the preset position information of the riser. According to claim 1, The riser elevator unit,
A power supply unit installed on the bottom of the cargo hold;
It is installed between the riser rack in the cargo hold, the lifting portion rising to the upper portion of the catwalk by the operation of the power supply; And
It is installed on the upper portion of the lifting portion, the riser handling system, characterized in that it comprises a parking portion for seating the riser carried by the gantry crane. According to claim 1,
It is formed on the upper portion of the cargo hold, and further includes a pair of support structures that are vertically installed on both sides of the opening that is a passage for the riser,
The support structure,
Riser handling system for guiding the rise or fall of the riser elevator, and supporting the catwalk guide for guiding the movement of the catwalk. The catwalk guide part of claim 4,
The riser handling system is installed at the upper end of the support structure and extends to the drill floor, and has a riser through-hole having a size through which the riser penetrates when the riser elevator is raised. The method of claim 5, wherein the control unit,
When it is determined that the riser is mounted on the riser elevator part and before it rises above the catwalk through the riser through-hole, one of the pair of trolleys is controlled to be located in the front, and the other of the trolleys is placed at the rear. To control the position,
When it is determined that the riser is mounted on the riser elevator part and rises above the catwalk through the riser through hole, the one trolley is controlled to move backward until one side of the riser is seated, and the other one trolley And controls to move forward until the other side of the riser is seated,
When it is determined that the riser is seated by the pair of trolleys, the pair of trolleys are controlled to move simultaneously forward until reaching the drill floor,
When the riser transferred to the drill floor is lifted by a top drive, and it is determined that the pair of trolleys do not have the riser, the pair of trolleys are controlled to move backwards at the same time until they reach the initial position. Riser handling system. Drilling line equipped with the riser handling system according to any one of claims 1 to 6.

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