KR20150019524A

KR20150019524A - Mining bit for a floating structure

Info

Publication number: KR20150019524A
Application number: KR20130096535A
Authority: KR
Inventors: 안현식
Original assignee: 대우조선해양 주식회사
Priority date: 2013-08-14
Filing date: 2013-08-14
Publication date: 2015-02-25

Abstract

A drilling rig for a floating structure is disclosed. The drilling rig for a floating structure comprises: a drilling pipe in a floating structure; a coupling unit which is coupled to the drilling pipe through an axis; and a parallel drilling bar which is attached to the coupling unit at a fixed angle according to drilling and descending of the drilling pipe. Therefore, the drilling rig for a floating structure can efficiently drill solid mineral by drilling in a cone shape, in particular, can further improve efficiency when mineral is distributed vertically, can reduce concerns over loss of mineral, and can use the existing mobile offshore drilling unit (MODU) without largely remodeling the existing MODU.

Description

[0001] Mining bit for a floating structure [0002]

The present invention relates to a drilling bit application apparatus, and more particularly, to a drilling apparatus applicable to a floating structure such as a conventional mobile offshore drilling unit (MODU) will be.

In general, marine projects refer to drilling and production facilities used to develop resources such as oil and gas in the sea.

The resource development of the sea goes through the process of prospecting, profitability evaluation, production of equipment, production and sales. In particular, drilling facilities for production evaluation and production facilities for production are called drilling and production facilities.

These marine projects can be roughly divided into drilling facilities and production facilities depending on the purpose. Drilling equipment refers to the equipment that makes holes on the bottom of the sea floor, inserts pipes, and extracts crude oil or gas. It refers to a structure that extracts crude oil and gas from such holes and stores it.

The production system is largely different from the drilling system which can be mass-produced by standardized model.

Typical drilling facilities include a drill ship that can be propelled (self-propelled) by propulsion and is resistant to deep-sea oil drilling.

There is a semi-submersible drilling rig, which is capable of developing deep-sea oil fields as well as drillships, is advantageous in high-wave areas and has excellent motion performance even in the blue.

It is a drilling facility featuring legs such as WTIV (Wind Turbine Installation Vessel), which is used to develop oilfields in relatively low water depths by fixing the bridge to the sea floor and drilling. Jack-up rigs (jack-up rigs), most of which are small and medium-sized.

Production facilities can be divided into fixed facilities (platform) and floating facilities (FPU, FPSO, LNG-FPSO) depending on the depth of water. Unlike the onshore plant where the existing facilities are arranged in a relatively large area, the mobile offshore drilling unit (MODU) is a notable target, and the market for it is rapidly emerging.

The production facility arranges the equipment in several layers to make the most of the limited space. Also, since it is hard to repair once installed, it is manufactured with high durability so that it can be held for 30 to 50 years.

Platforms and Fixed Platforms are constructed by installing substructure (concrete, jacket, tower, etc.) on the sea floor and placing the top production facility on top of it. Platforms also include wellhead, It can be divided into Collector or Manifold, Process, Gas Injection, Waste Incineration (Flare) and Living Quater Platform.

If there is room in the marine installation period, each function is often separated. In a sea environment where the installation environment is poor, such as the North Sea, a large platform integrated with all the functions is integrated into a single platform and installed at a time .

TLP (Tension Leg Platform) is a semi-submerged structure floating on the water. It is a high-tension leg installed on the sea floor that cancels the motion caused by waves. When the structure is slightly submerged in water, Buoyancy, etc.). These buoyancy acts on the vertical, so it is controlled by the waves and tides.

The shape of the product itself is often similar to FPU (Floationg Production Unit). Depending on the scale, the structure (hull) may be manufactured in the form of a plus (+) shape, and drilling equipment may be installed to enable drilling In some cases, FPU is literally floating on the sea.

Other FPSO (Floating Production Storage & Offloading) is a vessel for oil production, storage, and unloading. In areas where undersea pipelines are not developed, it transports crude oil to land using shuttle tankers. FPSO is a shuttle tanker In addition to the FPSO of the ship type, there is also a cylindrical type.

In addition, LNG-FPSO (Liquefied Natural Gas - FPSO) basically has the same concept as FPSO, but it treats LNG (Liquefied Natural Gas) which is not crude oil.

In order to collect the submarine minerals that are difficult to maneuver in this situation, it is necessary to use ore mining system consisting of MSV (Mining Support Vessel), RALS (Riser & Lifting System) and SMT (Seafloor Mining Tool) After crushing, the crushed minerals were collected at a certain location using a vehicle and the mineral was moved to the sea by using a transfer pipe. However, marine pollution due to underwater crushing was serious, And the minerals in the seafloor can be collectively collected. Therefore, there is a problem that the range of mining is narrow, and there is a problem that an expensive MSV is separately required.

There has not been found a patent document having a solution to solve the above-mentioned conventional problems as a prior art which becomes the background art of the invention.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a digging device for a floating structure capable of collecting solid matter in the sea bed more efficiently and preventing loss of collected minerals .

According to an aspect of the present invention, there is provided a drilling rig for a floating structure, comprising: a drilling pipe of a floating structure; A coupling part axially coupled to the drilling pipe; And a parallel excavation bar pivotally attached to the engaging portion at an angle according to excavation and descent of the drilling pipe.

The coupling portion may include a threaded portion screwed into the drilling pipe.

The parallel excavation bar may be hinged to one or both sides of the coupling portion.

The parallel excavation bars can be excavated in a cone shape by rotating excavation in a tilted state in a state of rotating excavation parallel to the sea floor.

The parallel excavation bar can be pivoted as the drilling pipe descends and can be excavated in an inclined state.

The floating structure is a marine mobile offshore drilling unit (MODU).

According to the embodiment of the present invention, since it is possible to excavate in a cone shape, it is possible to collect solid minerals more efficiently, especially when the minerals are vertically distributed, the efficiency is further increased and the possibility of loss of minerals is reduced And it has an effect that it can be used without largely modifying the existing MODU.

1 is a schematic view showing a drilling rig for a floating structure according to an embodiment of the present invention,
Fig. 2 to Fig. 4 are operation diagrams showing the operation of the excavation apparatus for Fig. 1 floating structure,
5 is a partial schematic view showing a drilling rig for a floating structure according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, when an element is referred to as " including " any element throughout the specification, it is to be understood that the element may include other elements unless specifically stated otherwise.

1 shows a drilling rig for a floating structure according to an embodiment of the present invention.

1, a drilling apparatus according to an embodiment of the present invention includes a coupling portion 10 having a threaded portion 12 formed on an upper portion of the coupling portion 10, Excavation bar (20).

The parallel excavation bar 20 is preferably a mining bit that is easy to collect underwater minerals.

The threaded portion 12 is threadedly attached to the end portion 34 of the drilling pipe 32 of the floating structure 30 so that when the drilling pipe 32 is rotated the engaging portion 10 is also rotated .

A parallel excavating bar 20 is formed at a lower portion of the joining portion 10 with a hinge shaft 14 to which the end portion of the parallel excavating bar 20 is axially coupled, And can be pivoted at a predetermined angle.

A plurality of toothed portions 22 may be formed on the lower surface of the parallel excavation bar 20 at predetermined intervals and protrusions 24 having teeth 22 of the same shape centering on the anchor portions 10 may be formed . As the projections 24 are formed, the excavation can be performed easily.

2, during the initial excavation, the parallel excavation bar 20 is axially coupled in parallel to the hinge axis 14 of the coupling portion 10, The parallel excavation bar 20 is also excavated while rotating along the sea floor.

In particular, as the projections 24 are formed at the center of the parallel excavation bar 20, a lot of excavation is performed, and the minerals collected can be collected into the floating structure 30 through the drilling pipe 32.

3, when the drilling pipe 32 is lowered a little, the parallel excavating bar 20 is slightly pivoted about the hinge shaft 14 of the engaging portion 10 and inclined It is possible to excavate deeper while rotating.

4, when the drilling pipe 32 further descends, the parallel excavation bar 20 is further pivoted about the hinge shaft 14 of the engaging portion 10 and is inclined to be sharp As a result, the whole excavated surface has a cone shape. As a result, the solid minerals deep in the seabed are more efficiently picked up. Especially, when the minerals are vertically distributed, the efficiency is further increased Minimized mineral loss can be reduced.

Meanwhile, in the above embodiment, the parallel bar excavation bar 20 in the form of a rectangular bar is attached to one side of the lower portion of the coupling portion 10 in the form of a cantilever beam. However, as another embodiment, , The parallel excavation bar 20 can be pivotally coupled to both sides of the lower portion of the engaging portion 10 at a predetermined angle. In this case as well, the operation is the same as described above, and a detailed description of the operation will be omitted.

In the present invention, the floating structure may be any structure capable of drilling the seabed resource. In particular, in the case of a mobile offshore drilling unit (MODU), a mining bit is used instead of a general drilling bit It is preferable to use the existing equipment as it is or to use only a part of the equipment.

It is to be understood that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit and scope of the present invention as set forth in the following claims. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. It should be understood that many other modifications and applications are possible within the scope of the basic technical idea of the present invention.

10:
12:
14: Hinge shaft
20: parallel excavation bar
22:
24:
30: floating structure
32: Drilling pipe
34: end

Claims

As a drilling rig for a floating structure,
Drilling pipe of floating structure;
A coupling part axially coupled to the drilling pipe; And
And a parallel excavation bar pivotally attached to the engaging portion at a predetermined angle according to the excavation and descent of the drilling pipe.

The method according to claim 1,
Wherein the coupling portion includes a threaded portion screwed to the drilling pipe.

The method according to claim 1,
And the parallel excavation bar is hinged to one side of the coupling portion.

The method according to claim 1,
Wherein the parallel excavation bars are hinged to both sides of the engaging portion.

The method according to claim 3 or 4,
Wherein the parallel excavation bars are rotary excavated in a tilted state in a state of rotating excavation parallel to the sea floor, and excavated in a cone shape.

The method according to claim 1,
Wherein the parallel excavation bar is pivoted and tilted as the drilling pipe is lowered.

7. The method according to any one of claims 1 to 6,
Wherein the floating structure is a marine mobile offshore drilling unit (MODU).