KR20160053062A - Pinch Body with inconel overlay welded hinge shaft - Google Patents

Abstract

The present invention relates to a pinch body of an anchoring system of an offshore plant and, more specifically, to a pinch body having an inconel overlay welded hinge shaft, which improves the corrosion resistance and abrasion resistance of the coupled surface of a hinge shaft part where the pinch body is hinged to the anchoring system by performing inconel overlay welding in the coupled surface. According to an embodiment of the present invention, the pinch body having an inconel overlay welded hinge shaft reduces the costs of the system while maintaining the corrosion and abrasion resistance of the whole pinch body of the anchoring system of the offshore plant.

Description

[0001] The present invention relates to a pinch body having an incline surface welded surface hinge shaft,

The pinch body of an offshore plant anchoring system is characterized in that the engagement surface of the hinge shaft portion hinge-coupled to the anchoring system is welded to the inconel surface to enhance the corrosion resistance and wear resistance of the engagement surface. To a pinch body having a welding surface hinge axis.

As the depletion of energy sources and the rise in oil prices, competition for securing energy resources between countries for deep water is steadily increasing orders for energy and resource plants such as oil, gas and offshore plants. And 33% and 31%, respectively, of land (including land) are expected to increase to 35% and 41% in 2020, respectively.

The demand for oil, gas, and other oil and gas related offshore plants is expected to grow steadily in line with energy demand, price changes, and global oil & gas resource trends. ), Which is a very high entry barriers industry.

Therefore, although it is strengthening financial and policy support to nurture the offshore plant industry in the deep sea region, it is inferior in performance for this reason.

In terms of shipbuilding, Korean companies that have the world's best shipbuilding capacity have a high track record. However, in the case of offshore plant equipment such as FPSO and drillships, the localization rate of core equipment is less than 20%. Even if it includes general purpose equipment It is only 35.1% of the total, and it is essential to expand the localization rate of offshore plant equipment in order to grow the marine plant industry and increase value added.

The offshore plant industry is a consumer-oriented market, such as oil majors. It is a structure that determines all the specifications and equipment at the feed stage. Unlike the shipbuilding industry, products are not standardized and require high standards for environment and safety. .

In addition to downstream industries such as petroleum and gas resources, downstream industries such as machinery, electricity and shipbuilding are also highly effective. Major oilfield nations such as Brazil, Norway, China, Malaysia and Nigeria pursue their profits, (NOC) is emerging.

Emerging nations such as South America, Africa, and Southeast Asia have granted NOCs exclusive rights to exploit their maritime development. As a result, NOC's investment in oil refineries has risen from 1% in the 1970s to 65% recently. NOCs in emerging nations prefer to use turnkey contracts for offshore plants because they lack technology and management capabilities than IOCs and strictly apply local content (local production) regulations to foster their industries.

Demand for offshore plants is continuously increasing due to the development of marine development technology, the lack of onshore resources, and the emergence of new demand due to the shift of consciousness to marine space. It is expanding its utilization area as an alternative means for utilization of space not only for utilization (production) but also for global water depth area.

As energy demand in emerging emerging nations continues to rise, energy shortages and high oil prices continue to fuel the development of deep-sea oil fields. In 2006, when oil prices were above $ 60 a barrel, orders for deepwater drillships surged and oil prices surged to more than $ 100 per barrel The development of the deep-sea oil field is expected to become more active as it is expected to continue.

The marine plant market is expected to grow rapidly in response to the revitalization of deep-sea oil field development. The offshore plant means sea and underwater equipment required for marine resource development such as drilling and resource production. The global market size is expected to reach $ 327.5 billion , And $ 504 billion by 2030, with an annual average growth rate of 6.7%.

With the development of marine resources exploration and drilling technology, marine resource development is expanding to deep sea, and the amount of reserves is continuously increasing, and the exploration is actively proceeding, and confirmed reserves are expected to increase further.

With the development of exploration and drilling technology, it is expected that the exploration of deep sea exploration below 3,000m has recently increased and the success rate has been greatly increased. Deep sea platform (FPSO, SPAR, etc.) facilities are expected to lead the market growth. With the accelerated development of marine resources, the reserves of marine energy resources amounted to 379.2 billion barrels, accounting for 28.1% of total oil and 68.03 ㎥ of natural gas, accounting for 37.1% of the total.

In particular, the development of deep-sea oil fields will continue to increase. In 2025, deep-sea crude oil production will account for 13% of total crude oil production. The oil reserves in the deep sea will exceed 150 billion barrels only in Brazil and Africa, Expansion is expected to increase reserves

Shipbuilding competitiveness has become a key business capability due to the development of the deep-sea oil field. Although the influence of the manufacturing companies has not been strong in the offshore fixed facilities, the shipbuilding capacity is the key because the floating technology is based on the ship technology. As the tendency has increased, domestic shipbuilders, which are competitive in production quality, are stronger.

In the advanced markets such as the Gulf of Mexico and the North Sea, the proportion of emerging marine development markets such as Africa, South America and Southeast Asia has increased, leading to the development of international oil companies (IOC) As the state-owned oil corporation (NOC) of the country develops the new marine development area, it sees the market based on long-term relationship with the company, and since it prefers the turnkey method (collective contract) unlike the past, , And the business method is changing.

Of the total 111 production facilities for FPSO and other offshore plants for production facilities, 51 have been produced in Korea, accounting for 46% of the world market share. In addition, Singapore and China are pursuing Korea with a market share of 16% and 13%, respectively. Domestic offshore plant industry is focused on construction and production, centering on large shipbuilders, and is actively engaged in entering the value chain of offshore plants. I can not.

In the offshore plant equipment field, which accounts for 35 ~ 55% of offshore plant price, Korea is relatively industrial entry level in terms of differentiated technology, reliability, and delivery performance compared to advanced countries such as EU, USA and Japan. The average localization rate of shipbuilding equipments installed on commercial vessels is 80 ~ 90%, while the proportion of offshore plant equipment such as FPSO and drillship is only 20%.

The offshore plant industry, which is difficult for Korean companies to enter the market, needs to address the challenges faced by technological difficulties and lack of marketing capabilities.

From this point of view, in case of floating offshore plant, the anchoring system has a very important technological position. In the marine anchoring system, the pinch body (pinch body) is required to have high corrosion resistance and wear resistance requirements.

Accordingly, in the prior art method, the entire pinch body must be manufactured using Inconel material excellent in corrosion resistance and abrasion resistance, which has a problem of greatly increasing the cost of the apparatus.

An object of the present invention is to provide a pinch body having an inconel surface welding raised surface hinge axis which reduces the cost of the apparatus while maintaining corrosion resistance and wear resistance of the entire pinch body of an offshore plant anchoring system.

In order to accomplish the above object, the present invention provides a pinch body of an offshore plant anchoring system, wherein the coupling surface of the hinge shaft portion hinged to the anchoring system of the pinch body is welded to the Inconel surface to strengthen the corrosion resistance and wear resistance of the coupling surface. The present invention relates to a pinch body having an inconel surface welding raised surface hinge axis.

According to the present invention, there is an advantage that a pinch body having an inconel surface welding raised surface hinge axis which reduces the cost of the apparatus while maintaining corrosion resistance and abrasion resistance of the entire pinch body of the marine plant anchoring system is provided.

1 is a cross-sectional view of a pinch body of the present invention
Fig. 2 shows the overall structure of the pinch body.

Hereinafter, the present invention will be described with reference to the drawings. In the following description of the present invention, a detailed description of related arts or configurations will be omitted when it is determined that the gist of the present invention may be unnecessarily obscured will be.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to be exemplary, self-explanatory, allowing for equivalent explanations of the present invention.

1 is a cross-sectional view of a pinch body of the present invention, and FIG. 2 is an overall structural view of a pinch body.

As shown in the drawings, the present invention is a pinch body of an offshore plant anchoring system, in which an engaging surface 300 of a portion of a hinge shaft 30, in which the pinch body 10 is hinged to an anchoring system, The pinch body has an inconel surface welded surface hinge axis, which enhances corrosion resistance and abrasion resistance of the engaging surface (300).

FPSO (Floating Production, Storage & Offloading) is a floating oil production and storage facility. It is capable of mining, storing, loading and unloading offshore and is suitable for development of small deepwater oil fields.

In the era of high oil prices, oil producers around the world are investing heavily in petroleum exploration and development projects on the premise that crude oil prices will rise further. Due to the economical and convenient transportation of offshore oil development, Another new form of FPSO emerged.

The overall appearance of the FPSO is similar to that of a conventional super large tanker. However, the upper part is equipped with facilities for crude oil refining, gas compression, crude oil unloading, seawater infusion, and self-power generation, so that crude oil is mined, refined, stored and unloaded.

After the drilling rig drills the oil well, the FPSO vessel comes to store crude oil production, crude oil, and unloads it with a shuttle tanker. Then the Shuttle Tanker carries the crude oil between sea and land, thus the FPSO ship is in the midst of the Shuttle Tanker and Drillship.

FPSO vessels have been responsible for the production of shallow sea oil resources through the existing Fixed Production Platform. However, for the development of small oil wells scattered in many places, mobile production such as FPSO The facility became necessary.

FPSO vessels are considered to be an economical offshore oil development vessel capable of producing oil without pipeline, because they are highly maneuverable. Fixed Prodution Platforms need to be decommissioned if they are working in one place, but FPSO need not be dismantled It is economical because it can be used up to the life of ship, and FPSO has many advantage in design and skid loading because it has more space than Fixed Platform due to its wide deck area.

Since the FPSO is drifting in one place and collecting petroleum by-products of the seabed, the Mooring system is very important.

Because it keeps drifting in the sea continuously, it is influenced by waves, winds, algae, etc. For this reason, it installs the turret mooring system by penetrating the athlete to the player. Attach the chain from 4 to 8 pairs and fix it under the sea.

The mooring system is composed of a ratchet, a roll body, a bearing block, etc. in addition to the pinch body 10 (pinch body) as shown in FIG. 2 for protecting the chain 20 and is directly exposed to the sea water surface, It is required to have considerable corrosion resistance and abrasion resistance.

As shown in FIGS. 1 and 2, the pinch body 10 is formed with a hinge shaft 30 to be fastened to the anchoring system. In the present invention, since the corrosion stress is concentrated on the hinge shaft 30, The engaging surface 300 is formed by inconel-up welding on the hinge axis where stress is concentrated.

The present invention relates to a pinch body abrasion resistant welding technique which forms a high-quality and high-quality material layer on a low-cost base material. And it can be applied to the development of parts and materials for nuclear power plant and thermal power plant in addition to FPSO offshore plant industry.

Due to the recent advancement of the industry, materials with excellent properties and various properties are demanded even in extreme environment. In extreme use environments, not only the physical properties of the existing materials are improved but also the preferential control of the surface properties which are primarily exposed to these environments And various surface treatment methods corresponding thereto have been used.

The upbringing welding technique is a surface treatment method which improves the properties by uniformly welding the welding material of the alloy having the wear resistance, the corrosion resistance or the heat resistance to the inner and outer surfaces of the product.

The surface modification and maintenance method applying the upholstery to the equipment field which needs to be used for a long time under harsh use conditions and the equipment field requiring the repair with extreme surface wear are effectively applied and utilized.

In general, corrosion and abrasion are chemical and mechanical damages that occur on the surface of a material and are an important factor in determining the life and operating condition of the mechanical parts, which is a cause of a lot of cost in the whole industrial facilities.

Particularly, various types of wear are required because of consideration of form and method of load, speed, temperature, material, lubricant and atmosphere. In order to reduce such abrasion, a method of hardening the surface of a material or a material having excellent abrasion resistance is developed have.

There is a surface heat treatment method such as carburizing, nitriding, and boronizing which improves the abrasion resistance. However, since it is difficult to apply it to industrial equipment of a large scale factory due to high cost of equipment, small size, poor weldability, difficulty in replacing and repairing In order to compensate for this, a welding technique that improves the surface properties of the material is applied by uniformly welding the corrosion resistant and heat resistant welding material on the base material of mild steel.

In the present invention, an automatic welding process is used for the inconel welding of a pinch body. The inner and outer surfaces of the pinch body can be automatically and independently welded, and the conventional pinch body manual welding section The mechanical properties of the entire pinch body are improved and the possibility of occurrence of defects such as pores which may be potentially present in the welded portion is low.

Pinch body automation In case of different kind of welding process equipment, the wire feeder is rotated by the wire feeder line when the automatic feed is given from the outside by the rotating shaft, and the workpiece is fixed and the wire filler is reversed and welded.

The non-rotating motion of the work piece and the backward motion of the torch roller assembly cause the spiral shape to be welded. The gap between the inside of the workpiece and the outside of the workpiece is constant, Can be prevented, and mass production is possible, and the cost reduction effect is great.

It will be apparent to those skilled in the art that the present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It is to be understood that the technical spirit of the present invention is to the extent possible.

10: Pinch body 20: Chain
30: hinge shaft 40: coupling surface

Claims (1)

In the pinch body of an offshore plant anchoring system
Wherein the engaging surface of the hinge shaft portion hinged to the anchoring system of the pinch body is welded to the inconel surface to reinforce corrosion resistance and abrasion resistance of the engaging surface.

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