KR20130059952A

KR20130059952A - Lifting type hydrophone apparatus for drillship

Info

Publication number: KR20130059952A
Application number: KR1020110126214A
Authority: KR
Inventors: 김형일
Original assignee: 현대중공업 주식회사
Priority date: 2011-11-29
Filing date: 2011-11-29
Publication date: 2013-06-07

Abstract

The present invention relates to a traction type hydrophone device for drillships, the object of which is to configure a hydrophone for the dynamic position control of the drillship in the drillship, so as to occupy a simple structure and a small space, such as a crane of the drillship itself It is to provide a traction type hydrophone device for a drillship to increase the utilization of the limited space of the drillship by simply configured to move up and down using.
The configuration of the present invention and the trunk (1) is installed and fixed through the upper deck and the bottom of the drill ship; Is inserted into the trunk is configured to move up and down, the traction ring 21 and the traction ring fastener 22 is formed in the upper portion, the hydrophone fastening pipe (2) and the hydrophone fastener 23 is formed at the bottom and ; One end is fastened to the traction ring and the other end is connected to a wire rope (3); Is fastened to the lower hydrophone fastener 22 of the hydrophone lifting pipe (2), the electrical cable 41 is wired to the outside of the trunk (1) through the hydrophone lifting pipe (2) at one point Tow hydrophone device for a drillship consisting of a hydrophone (4) installed is characterized by the invention.

Description

Lifting type hydrophone apparatus for drillship

The present invention relates to a traction type hydrophone device for a drillship, and more specifically, to install a hydrophone used for the dynamic position control of the drilling position of the drillship in the drillship using a small space when using a limited space utilization of the drillship The present invention relates to a hydrophone device configured to raise and lower a hydrophone in a simple manner using a crane of a drill ship itself.

As industrial and industrial developments worldwide, the use of petroleum, natural gas, etc. increases, and as a result, there is a growing interest in the development of marginal or deep sea oil fields, which have been ignored because of lack of economic feasibility. In addition to the development of seabed mining technology, offshore structures equipped with drilling facilities for developing such oil fields are being developed in various forms.

Marine structures for this purpose include fixed offshore structures, flexible offshore structures and floating offshore structures.

The fixed offshore structures include submersible platforms, jack-up leagues and gravity platforms, and the flexible offshore structures include the TLP (Tention Leg Platform), the columnar platform (Spar platform), and the CPT (Compliant Piled Tower). Structures include semi-submersible drilling rigs, drillships, semi-submersible floating production semi-submersible (FPSS), floating storage and offloading vessels (FSOs), floating production storage and offloading vessels, LNG FPSO, and LNG Floating Storage Regasfication Unit (FSRU).

That is, the fixed offshore structures are mainly rig ships or fixed platforms dedicated to offshore drilling, which are used for offshore drilling while anchored at one point of the sea. It is an operable drillship in the form of a general ship that can be equipped with drilling equipment and can sail on its own power.

Looking at the basic configuration of the drillship, the center of the drillship is formed in the center of the drillship (moonpool) to move the riser (drill) or drill pipe (drill pipe) for drilling oil or gas existing in the basement of the seabed up and down The operator drills the riser and drill pipe downward through the door pool formed in the center of the drilling rig to drill undersea resources stored in a well located in the reservoir below the sea bed. .

The floating offshore structure is not suitable for continuous work in a rough marine environment because the hull is not fixed to the bottom of the sea. That is, the floating type is a horizontal movement by the wind, waves, currents, tidal currents, etc., it is necessary to position control equipment to position the structure where desired. In particular, when installed in the deep sea, the position can not be fixed by the mooring system alone, the position is corrected by moving using an azimutus thruster or the like. Typically, the drillship is equipped with four to six azimutus type thrusters that provide propulsion to correct the propulsion or position of the drillship.

Figure 4 is an exemplary view showing a communication method between the hydrophone for the dynamic position control of the drillship and the like and the acoustic beacon installed on the sea floor. With reference to this, a drillship position control method will be described. It is important for drillships whose location changes frequently depending on the sea situation to match the coordinates of the drilled points located hundreds to thousands of meters below the sea floor. If the drilling position coordinates of the drillship and the coordinates of the subsea drilling point do not coincide, the drill ship's lowering from the derrick to the subsea drilling point and the riser to protect it are not only required, but also the inclination prevents smooth vertical drilling. It may not.

For this reason, a plurality of beacons (a minimum of four acoustic sensors) are installed near the seabed drilling point on the bottom of the seabed where floating offshore structures such as drillships are located, and the acoustic signals of the beacons are detected and received. 6 hydrophones are installed on the drillship to determine the position of the beacon and to correct the position of the drillship, or to adjust the position of the drillship using GPS satellites and GPS sensors. Positioningm DP) system is used to confirm the position of the ship.

The conventional hydrophone detection equipment and its mounting structure for dynamic position control of the drillship as described above will be described below.

Figure 5 is an exemplary view showing an integrated hydrophone device according to a conventional embodiment. The conventional hydrophone device mounted on the drillship is a device that is integrally completed before mounting the drillship, it is purchased in a dedicated space provided in the drillship Will be installed.

Looking at the hydrophone device schematically comprises a hydrophone located in the lower portion, and a means for raising and lowering the rod connected to the hydrophone. The lifting means is usually constituted by a motor driving type lifting means.

Therefore, when the hydrophone is operated, the rod with the hydrophone installed at the bottom is projected to the lower part of the bottom of the drillship to detect the acoustic signal generated from the beacon installed on the seabed, and when the hydrophone is not used, the hydrophone is used. Ascended.

However, the conventional hydrophone device as described above is composed of an integrated dedicated equipment including a motor and a deceleration equipment and various gear equipment for raising and lowering the hydrophone, so that a plurality of dedicated spaces over a predetermined space should be prepared when the drillship is dried. In addition, such an increase in the mounting space has been a problem such as the fuel storage space required for a long ship stay is reduced. Moreover, the conventional hydrophone device has a problem in that it occupies more of a limited drillship space because it must also provide a space for maintenance inspection and repair.

An object of the present invention for solving the above problems is to use a simple structure and a small space when installing the hydrophone for the dynamic position control of the drillship in the drillship, and then using the crane of the drillship itself It is to provide a traction type hydrophone device for a drillship to increase the utilization of the limited space of the drillship by configuring to move up and down.

The present invention to achieve the object as described above and to perform the problem for eliminating the drawbacks of the conventional trunk and the installation is fixed through the upper deck and the bottom of the drill ship;

Is inserted into the trunk is configured to move up and down, the traction ring and traction ring fasteners are formed in the upper portion, the hydrophone fastening pipe formed in the lower portion of the hydrophone fastener;

A wire rope having one side coupled to the traction ring and the other side coupled to the crane;

A hydrophone fastened to the lower hydrophone fastener of the hydrophone lifting pipe, the electric cable being wired to the outside of the trunk through the hydrophone lifting pipe at one point; By providing a phone device.

In another preferred embodiment of the present invention, a check window is formed at one point of the trunk, and a support bracket for supporting the trunk is formed at the bottom of the trunk to be fixed to the upper portion of the bottom of the trunk.

As described above, the present invention has the advantage that the hydrophone device installed in the drillship is simple and the space area is significantly reduced during installation, thereby increasing the space utilization of the limited drillship,

By using the crane of the drillship itself rather than a separate dedicated motor means for the hydrophone lifting method, the device configuration is simple, and the installation cost is low and the drillship drying cost is lowered.

With the trunk penetrating the upper and lower sides of the drillship, the hydrophone can be lifted and lowered by lifting method, so that when the hydrophone is not in use or during maintenance, it can be easily lifted and safely stored or maintained in the drillship deck. It is a useful invention with the invention is expected to be greatly used in the industry.

1 is an exemplary view showing a hydrophone device according to an embodiment of the present invention,
Figure 2 is an exemplary view showing a place where the hydrophone is installed in the drillship according to an embodiment of the present invention,
3 is an exemplary view showing the lifting operation of the hydrophone device according to an embodiment of the present invention,
4 is an exemplary view showing a communication method between a hydrophone and a beacon for dynamic position control such as a drill ship,
Figure 5 is an exemplary view showing a hydrophone unit according to a conventional embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is an exemplary view showing a hydrophone device according to an embodiment of the present invention. As shown, the present invention is installed and fixed through the upper deck and the bottom of the drillship, the inspection window 11 is formed at one point, the support bracket 12 is fixed to the top of the bottom to support the trunk is The trunk 1 formed is formed.

The cross-sectional shape of the trunk may be formed in a circular or polygonal structure, preferably a cylindrical structure having a circular cross section is preferable in structure.

Inside the trunk of the cylindrical or polygonal cylinder is a hydrophone lifting pipe (2) is inserted into the device. The up and down size of the trunk is a size penetrating between the upper deck and the lower bottom of the drillship, while the hydrophone lifting pipe 2 has a height smaller than this and is configured to move up and down inside the trunk 1.

In addition, the diameter of the hydrophone lifting pipe (2) is configured to have a gap that is less than the inner diameter of the trunk so that the friction is not severe when raising and lowering. However, if the gap is too large, noise is generated by the collision during the ascent and descent, and the hydrophone may be damaged by the collision, so the gap is formed as small as possible. However, since the specific gap value does not limit the present invention, as long as it can be easily raised and lowered in use, it is sufficient to install the gap as much as possible.

The hydrophone lifting pipe 2 has a traction ring 21 and a traction ring fastener 22 formed at an upper portion thereof for lifting and lowering, and a hydrophone fastener 23 is formed at a lower portion thereof.

Hydrophone lifting pipe (2) is composed of a hollow hollow type, the upper part is equipped with a tow hook fastener 22 that serves as a cap, the tow hook fastener is equipped with a towing ring 24 ) Is formed and the towing ring is pinched. In addition, the traction ring fastener is formed with a hole (not shown) through which the electric cable 41 for supplying electricity to the hydrophone 4 is formed.

The wire rope (3) is coupled to the traction ring to move the wire rope up and down according to the crane operation to raise and lower the hydrophone lifting pipe (2). To this end, the wire rope is configured such that one side is fastened to the towing ring and the other side is fastened to the crane.

In addition, the wire rope is composed of a plurality of unit wire rope for easy extension of the length, by using the connector 31 between each other to connect between the unit wire rope is configured to extend by the required length by connecting the unit wire rope on both sides It was.

The hydrophone 4 is installed at the lower portion of the hydrophone lifting pipe 2 so as to detect an acoustic signal from a plurality of beacons (at least four) installed on the sea bottom.

To this end, the upper portion of the hydrophone 4 is configured to be fastened to the hydrophone fastener 23 installed in the lower portion of the hydrophone lifting pipe 2. The fastening method may be fastened by various known methods including welding, fastening bolt nuts, and the like.

In addition, an electric cable for operating the hydrophone and transmitting acoustic information detected therefrom is configured to be connected to the hydrophone 4. The electric cable 41 is wired outside the trunk 1 through the hydrophone lifting pipe 2 and connected to a detection device or a computer to be utilized as position correction information.

Figure 2 is an exemplary view showing a place where the hydrophone is installed in the drillship according to an embodiment of the present invention. As shown, the drillship has a total of six trunks, three on each of the left and right sides of the hull, and is configured to detect sound levels received from four beacons installed on the sea floor. When the position is determined based on the acoustic information, it can be seen that a plurality of thrusters for adjusting the position of the drill ship are installed in the lower part of the drill ship hull.

Figure 3 is an exemplary view showing the lifting operation of the hydrophone device according to an embodiment of the present invention. As shown, it can be seen that the hydrophone lifting pipe 2 towed by the wire rope 3 connected to the crane is inserted into the upper part of the protruding trunk 1 at the top of the drillship. 1) The hydrophone lifting pipe (2) inserted into the lower portion is projected into the water passing through the bottom of the drillship. The hydrophone 4 located at the bottom of the hydrophone lifting pipe 2 protruded into the water detects an acoustic signal of a beacon located on the sea floor. The detection method is as described in the prior art.

In addition, it can be seen that the operator checks the state of the hydrophone lifting pipe (2) inside the trunk (1) through the inspection window (11), where the operator's location is not a separate space, but the existing hull space of the drillship. to be. That is, unlike the prior art, the present invention may be installed through the existing hull without having to make a dedicated space for the hydrophone device.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

Description of the Related Art
(1): trunk (2): hydrophone lifting pipe
(3): wire rope (4): hydrophone
(11): Inspection window (12): Support bracket
(21): tow hook (22): tow hook fastener
(23): Hydrophone fastener (24): Tow hole
(31): connector (41): electric cable

Claims

A trunk 1 installed and fixed through the upper deck and the bottom of the drillship;
Is inserted into the trunk is configured to move up and down, the traction ring 21 and the traction ring fastener 22 is formed in the upper portion, the hydrophone fastening pipe (2) and the hydrophone fastener 23 is formed at the bottom and ;
One end is fastened to the traction ring and the other end is connected to a wire rope (3);
Is fastened to the lower hydrophone fastener 22 of the hydrophone lifting pipe (2), the electrical cable 41 is wired to the outside of the trunk (1) through the hydrophone lifting pipe (2) at one point Tow hydrophone device for a drillship, characterized in that consisting of; hydrophone (4) installed.

The method according to claim 1,
A check window 11 is formed at one point of the trunk, and a support bracket 12 for a drillship, characterized in that a support bracket 12 is fixed to the upper portion of the trunk to support the trunk.