KR20160001924U

KR20160001924U - Structure of derrick

Info

Publication number: KR20160001924U
Application number: KR2020140008706U
Authority: KR
Inventors: 오석우
Original assignee: 현대중공업 주식회사
Priority date: 2014-11-26
Filing date: 2014-11-26
Publication date: 2016-06-07

Abstract

The derrick structure according to an embodiment of the present invention includes a fast line wound on an upper portion of a derrick, both ends of which are positioned on both sides to adjust the height of the top drive; And a bumper portion provided on the derrick, the bumper portion being rotatably provided on the path of the fast line to prevent abrasion of the fast line.
The derrick structure according to the present invention reduces abrasion by reducing the friction generated on the fast line due to rotation of the roller member in conjunction with fastening and unwinding of the fast line and prevents the fast line from coming into direct contact with the derrick, And it is easy to separate the support member and the roller member from each other, so that the maintenance can be facilitated.

Description

Derrick structure {Structure of derrick}

This invention relates to a derrick structure.

Due to the recent rapid industrialization, the use of resources such as oil has skyrocketed, and the stable production and supply of oil is becoming a very important issue. However, the oil field in the continental or coastal waters has already been drilled. In recent years, interest has been focused on the development of a deep-sea deep-sea oil field. Drilling is generally used to drill deep-sea oilfields.

Drill ship is an offshore structure that is equipped with advanced drilling equipment and is built in a shape similar to that of a ship so that it can be sailed by its own power. It is capable of collecting raw oil or gas in deep sea area where an offshore platform can not be installed, It is advantageous that the drilling can be terminated and the drilling can be carried out by moving to another point.

Such drillings include Derrick, which has a Moonpool structure in a vertically penetrating form and is located above the drum and has drilling rigs. Hereinafter, the process of drilling the bottom of the drill ship will be described.

First, the drill ship uses its own power to move to the drilling area and drives a Dynamic Positioning System (DPS) using a plurality of thrusters to maintain the position.

Thereafter, the drill bit is connected to a drill pipe by a drill bit, and a plurality of drill pipes are connected by a sufficient length by using a Hoisting System and a Handling System provided in Derrick, And the drilling pipe is rotated through a rotating system to form a borehole.

Once drilling is completed, Derek picks up the drill pipe, installs the casing pipe on the borehole, and performs the cementing process to fill the concrete between the casing pipe and the borehole. The drilling operation used and the casing and cementing work for installing the casing pipe are repeatedly performed to maintain the shape of the borehole having a certain depth.

When the casing pipe is installed enough to prevent the borehole from falling down, BOP (Blow Out Preventer) is connected to the riser to be connected to the borehole. In this case, the inside of the riser becomes the path of movement of the drill pipe and casing pipe.

However, lubrication and cooling of the drill bit in the drilling process, and processing of the crushed material such as rock mass produced in the borehole are required. Therefore, the drill feeds the mud to the inside of the drill pipe so that the mud is discharged at the end of the drill bit, and after the mud performs lubrication and cooling of the drill bit, (Mud Circulation System) is used. The recovered mud is re-used after the pulverized material is filtered.

The drillship repeatedly performs drilling, casing and cementing operations until the drill bit reaches the well, while driving this mud circulation system. In this case, as the diameter of the casing pipe used in the casing work becomes smaller, Drilling can be implemented continuously by replacing small drill bits.

As such, the drill rig has a system for installing and using pipes and risers, a system using a mud, and the like. In order to smoothly perform drilling work using such a system, a drill hole structure, a derrick structure, and a load structure Is required to be disposed within a certain space, so that research and development are being continuously carried out as a result of a high technological power being required.

However, the top drive for assembling the drill equipment needs to be adjusted in the vertical position on the derrick, and the top drive is moved up and down by adjusting the length of the fast line wound on the derrick.

On the other hand, in order to adjust the length of the fastra, the fast line is wound and loosened, and the fast line reaches the derrick structure, so that the fast line may be worn or the derrick structure may be damaged.

The object of the present invention is to provide a derrick structure capable of reducing wear of the fast line and preventing damage to the derrick.

The derrick structure according to an embodiment of the present invention includes a fast line wound on an upper portion of a derrick, both ends of which are positioned on both sides to adjust the height of the top drive; And a bumper portion provided on the derrick, the bumper portion being rotatably provided on the path of the fast line to prevent abrasion of the fast line.

Specifically, the bumper portion includes a roller member; And a support member to which the roller member is rotatably provided.

Specifically, the roller member is characterized in that a plurality of roller members are arranged in a row in an up-and-down direction so that their rotational axes are shifted corresponding to the inclination angles of the fast lines.

Specifically, the support member is provided at both ends of the roller member so as to support both ends of the roller member.

The derrick structure according to the present invention reduces abrasion by reducing the friction generated on the fast line due to rotation of the roller member in conjunction with fastening and unwinding of the fast line and prevents the fast line from coming into direct contact with the derrick, And it is easy to separate the support member and the roller member from each other, so that the maintenance can be facilitated.

FIG. 1 is a view showing a drill rig provided with a derrick structure according to an embodiment of the present invention.
2 is a front view showing a derrick structure according to an embodiment of the present invention.
3 is a view showing a state in which the fast line is wound in a derrick structure according to an embodiment of the present invention.
4 is a front view showing a fast line and a bumper portion in a derrick structure according to an embodiment of the present invention.
FIG. 5 is a side view showing a fast line and a bumper portion in a derrick structure according to an embodiment of the present invention. FIG.
6 is a perspective view showing a fast line and a bumper portion in a derrick structure according to an embodiment of the present invention.

The objectives, specific advantages, and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments, which are to be taken in conjunction with the accompanying drawings. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements have the same numerical numbers as much as possible even if they are displayed on different drawings. In the following description of the present invention, a detailed description of known related arts will be omitted when it is determined that the gist of the present invention may be unnecessarily obscured.

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

1 to 6 are views for explaining a derrick structure according to an embodiment of the present invention.

1, a derrick structure 100 according to an embodiment of the present invention may be provided in a drill 10 or an ocean structure provided with a moon pool 12 In the present embodiment, for the sake of explanation and understanding, the drill 10 will be described as an example, but the present invention is not limited thereto.

The hull 11 of the drill string 10 is provided with a door 12 between a forward bow and a stern and the door 12 can be formed as an opening formed by vertically penetrating the hull 11. Here, the drum 12 is provided with a drill rig for performing a drilling operation. The drill rig may be provided on a derrick 110 included in the derrick structure 100 located above the portal 12.

At this time, the pipe is connected to a sufficient length by a handling system (not shown) through the door cloth 12 provided perpendicularly to the hull 11 and can be lowered to the sea floor through the door cloth 12, A gripper yoke (not shown) carries a pipe (not shown) to the handling system.

That is, each of pipes such as a drill pipe and a casing pipe is loaded on a pipe rack (not shown) of the pipe, and moved from the rack, erected and assembled to the seabed, A BOP gantry crane (not shown) carries the pipe loaded in the enemy cage on a conveyor (not shown) on top of a catwalk (not shown). Here, the crane 16 is provided on the hull 11 separately from the BOP gantry crane so that the equipment on the hull 11 can be carried or loaded and unloaded.

Such a hull 11 pulls up a mud mass such as clay, crushed rock, and the like, which is obtained by a pipe drilling operation, through a pipe and a riser. Here, the mud is continuously supplied by a mud pump (not shown) during the drilling operation in order to prevent the drill bit (not shown) from being overheated and to prevent the abnormal high pressure from rising on the pipe, These muds are fed into the pipe and back through the riser through the holes in the drill bit.

In this way, a drill rig such as a pipe and a riser is essentially provided for the drill 10 for a series of operations. In particular, a derrick 110, which can stably longitudinally support and support the pipe on the drill string 10 so as to be assembled so that pipes reaching tens of meters in length are connected to the sea floor in the longitudinal direction, A truss structure may be provided in a direction perpendicular to the deck 11A of the vehicle.

The derrick 110 is made up of a plurality of levels and is provided with a plurality of levels at the plurality of levels of the derrick 110 so that the operator can check and work equipment and structures such as drill equipment, And a safety rail (not shown) may be provided for the safety of pedestrians.

The derrick structure 100 of the present embodiment includes not only the derrick 110 but also the fast line 120 and the bumper portion 130.

The fast line 120 is of a construction such as a sling, which is wound on top of the derrick 110, with both ends thereof positioned on both sides to adjust the height of the top drive 20. Here, the fast line 120 is held so as to be supported for moving the top drive 20 in the lengthwise direction of the derrick 110 from the top of the derrick 110, and the length of the fast line 120 is adjusted and can be moved up and down within the derrick 110 by winding and unwinding. The other end of the fast line 120 may be fixed to the derrick 110 as a dead line 121.

On the other hand, when the fast line 120 is wound or unwound, that is, when the top drive 20 is at a high position on the derrick 110 as shown in FIG. 3 (the fast line is wound around the drawrow) One end of the fast line 120 comes close to the starting point S of the point where the fast line 120 is loosened and the top drive 20 reaches the derrick 110, The fast line 120 is loosened so that the fast line 120 is loosened so that one end of the fast line 120 is close to the last point F of the unwinding point, 120 are changed.

As shown in FIG. 4 (front view), as the fast line 120 is wound and loosened, its position is changed, and there is a possibility that the position of the fast line 120 is pulled up and down to touch the structure of the derrick 110, The bumper part 130 is provided.

The bumper part 130 is provided on the derrick 110 and rotatably provided on the path of the fast line 120 to prevent the fast line 120 from being worn. One bumper part 130 is shown for the convenience of explanation and understanding. However, as the plurality of bumper parts 130 are provided at positions where the fast line 120 can contact the structure of the derrick 110, (130) are arranged in a row in the vertical direction in the derrick (110), so that the impact of the fast line (120) can be alleviated.

5 and 6 (side view, perspective view), the bumper portion 130 may include a roller member 131 and a support member 132.

The roller member 131 slides on the roller member 131 when the fast line 120 is pulled as a roller so that the friction generated on the contact surface of the fast line 120 is reduced and wear of the fast line 120 can be reduced. For example, the roller members 131 may be provided in a plurality of rows and columns (in this embodiment, two rollers) so that the rotation axes are shifted corresponding to the inclination angles of the fast lines 120.

The support member 132 is configured to support both ends of the roller member 131. The support member 132 can support the roller member 131, (Not shown) through the roller member 131. The rotation shaft (not shown)

As described above, in this embodiment, the roller member 131 rotates in conjunction with the winding and unwinding of the fast line 120 to reduce the friction generated in the fast line 120, thereby reducing wear, and the fast line 120 It is possible to prevent the derrick 110 from being directly in contact with the derrick 110 and to reduce the damage of the derrick 110 and to easily separate the support member 132 and the roller member 131, can do.

Although the present invention has been described in detail with reference to specific embodiments thereof, it will be understood by those skilled in the art that the present invention is not limited thereto. It is obvious that the modification and the modification are possible.

It is intended that the appended claims be interpreted as including all such modifications and alterations insofar as they come within the scope of the appended claims and their equivalents.

10: Drill ship 11: Hull
11A: Deck 12:
16: Crane 20: Top Drive
30: Drawwork 100: Derrick structure
110: Derek 120: Fast Line
121: deadline 130: bumper part
131: roller member 132: support member

Claims

A fast line wound on the top of the derrick, the both ends of which are positioned on both sides to adjust the height of the top drive; And
And a bumper portion provided on the derrick, the bumper portion being rotatably provided on the path of the fast line to prevent abrasion of the fast line.

The bumper structure according to claim 1,
Roller members; And
Wherein the roller member includes a support member that is rotatably provided.

3. The image forming apparatus according to claim 2,
And a plurality of the upper and lower rows are provided so as to be offset from each other in correspondence with the inclination angle of the fast line.

3. The apparatus according to claim 2,
And the pair of roller members are provided at both ends of the roller member so as to support both ends of the roller member.