[China Aluminum Network] Offshore drilling platform is mainly used for offshore drilling structures, loading drilling, power, communications, navigation and other equipment, as well as safe life-saving and personnel living facilities, is an indispensable means of offshore oil and gas exploration and development. Its main self-elevating and semi-submersible drilling platforms. Most of the current offshore drilling platforms are made of steel. High strength of steel and low maintenance costs are its advantages. However, with the application of steel, problems such as corrosion, short service life, and high maintenance costs have gradually surfaced. Therefore, the search for a new type of material that is close to the strength of steel, has good durability, and is aesthetically pleasing is of long-term significance to the development of offshore engineering equipment. Aluminum profiles are light-weight, high-strength, corrosion-resistant, low-maintenance, and Many advantages such as recyclability and recycling can meet the needs of development. The specific advantages of aluminum profiles are as follows: 1) Light weight. The use of lightweight, strong aluminum alloy profiles, aluminum alloy light weight, easy installation, transportation and storage. The weight of aluminum alloy profiles is only 1/3 of that of steel structures. 2) Strong applicability. Can adapt to a variety of complex and harsh environments and climates. 3) Various combinations and beautiful appearance. Due to the strong plasticity of aluminum alloy, aluminum alloy profiles can produce a variety of beautiful structures with a more stylish and beautiful appearance. 4) Corrosion resistance, low maintenance. All profiles are treated with anti-oxidation, aluminum profiles have a service life of more than 30 years. As aluminum alloys are increasingly valued by the marine industry, many aluminum giants have also entered the research and development of R&D drilling platform aluminum alloy components. Alcoa has developed a high-performance aluminum alloy drill pipe. At present, commonly used steel drill pipes often encounter frictional hot cracking, hydrogen embrittlement, stress corrosion cracking, reduced drilling speed and efficiency, and excessive hook load in the construction of horizontal wells, highly corroded media wells, and ultra-deep wells. And other issues. The above problems are determined by the physicochemical properties of the alloy steel material itself. If the performance of the drill pipe is to be fundamentally improved, the raw material of the drill pipe body must be improved. 1. Improve drilling depth The density of aluminum alloy drill pipe is about 1/3 of that of steel drill pipe. The ratio of strength and quality of aluminum alloy drill pipe is 1.5-2.0 times of that of steel drill pipe, and the drill rig has a certain capacity. The application of aluminum alloy drill pipe can achieve a depth that can not be reached by the steel drill pipe. 2, good corrosion resistance Aluminum and its alloy elements are relatively active chemical properties, when it reacts with oxygen will form a stable oxide film on the surface, to prevent further reaction with the surrounding environment. Aluminum alloy drill pipe does not corrode in long-term foaming in saturated CO2 solution. After actual use, aluminum alloy drill pipe can effectively prevent H2S and CO2 corrosion at any temperature. Aluminum alloy drill pipe is divided into two kinds of steel joints and aluminum alloy joints. Although the aluminum alloy drill pipe steel joints do not have the ability to resist H2S and CO2, the weak link of the drill pipe is in the pipe body, and joints are generally not susceptible to H2S stress corrosion cracking. In addition, the steel joint is in contact with the aluminum alloy pipe body, which plays a role of cathodic protection. Therefore, the corrosion rate of the aluminum alloy drill pipe steel joint is low. 3. It is suitable for large-curvature directional wells and horizontal wells. The results show that when large-displacement drilling operations are performed under the same drilling conditions, the torque applied to the drill string is too large when the drill pipe is used, and the torque has exceeded the use of the drill pipe. At the limit, the torque on the drill string is significantly reduced when aluminum alloy drill pipes are used. The drill string suspension weight of the steel drill rod exceeds the limit of the upper drill rod, and there is an overload tensile fracture problem. The suspension weight of the drill string using the aluminum alloy drill rod is significantly reduced, and the tensile load on the upper drill rod is still in the The scope of safe use. 4, significantly reduce the hook load aluminum alloy drill pipe density of 3.2-3.6g/cm?, steel drill pipe density of 7.8g/cm?, aluminum alloy drill pipe in the air density is less than the steel drill pipe 1 /2. During drilling, aluminum alloy drill pipes exhibit good buoyancy characteristics. Therefore, the use of aluminum alloy drill pipes can significantly reduce the hook load and greatly increase the service life of the drill rig and wire rope. 5. Abrasion Resistance Compared to steel drill rods, aluminum alloy drill rods have poor wear resistance. When used in conjunction with turbo drilling tools or adding wear joints between aluminum alloy drill rods, aluminum alloy drill rods can be effectively prevented. Wear. Alcoa's FarReach Drill Pipe Features 1. The use of aluminum alloy drill pipes can increase drilling rig efficiency by 50% to 100%, while reducing tripping time and assembly and transportation costs. 2. The drilling depth is more than 36% of the steel drill pipe, and it can be less than 30% of the surface torque. 3. The inner surface of the tube is coated with a very corrosion-resistant coating, which is a nano-coating developed by the Alcoa Technical Centre and capable of operating under extremely harsh drilling conditions. Working, the service life is 30%-40% longer than that of a non-coated drilled aluminum alloy pipe. 4, using FarReach alloy products, each well cost can save 150,000 US dollars.