API drilling and production pipe oil high-pressure drilling hose is based on oil drilling and integrates hydraulic, mechanical, sealing and other technologies. At present, the combined structure of adhesive bonding and mechanical sealing is generally used in China. With the development of science and technology, the construction technology of drilling and production wells is also constantly improving, and higher requirements are put forward for drilling and production pipes. With the development of oil exploration, it has become an inevitable trend to use high-pressure, high-temperature and low-temperature media for drilling operations. The use of drilling and production pipes in drilling and production well construction can effectively reduce the environmental pollution caused by oil extraction. Therefore, it has been widely used and promoted in oil field exploitation.inner tubeThe inner pipe is an important part of the drilling and production pipe, mainly including the inner rubber layer, the reinforcement layer and the outer rubber layer.1. Inner rubber: It has the function of protecting the inner rubber. In order to prevent the glue from decomposing harmful substances, it is sealed.2. Reinforcing layer: the main function is to strengthen the strength of the inner tube. Paint the inner surface of the inner tube to improve the adhesion of the glue on the inner wall.3. External glue: In order to increase the bonding strength and rigidity of the outer surface, it should be vulcanized.4. Outer rubber layer: it is a sealing material with special properties, which has a good bonding effect with inner rubber. Therefore, its main function is to improve the mechanical strength and sealing performance of the hose.5. Outer glue: The main function is to seal the inner pipe body to prevent its wear and corrosion.6. The contact area between the inner tube and the glue should be 100%. When the temperature rises, there must be a large enough contact surface between the inner tube and the glue to prevent mutual wear.Inner hose outer diameterThe outer diameter of the inner rubber hose of the drilling and production pipe is usually determined according to the inner diameter of the inner rubber hose provided by the customer. Generally, it can be determined by the following methods:1. First determine the outer diameter of the drilling and production pipe, and then calculate it according to the outer diameter required by the standard inner rubber hose. If the outer rubber hose is used in conjunction with drilling and production wells, it is also necessary to calculate the inner diameter of the sealant to meet the requirements for the use of the inner sealant.2. Calculate the thickness of the outer hose according to the known data, and then perform the calculation. This method is the most common and usually requires no special equipment.3. Use a measuring instrument to measure the outer diameter of the drilling and production pipe and calculate it by a computer. This method is more accurate and reliable under certain conditions, but when using this method, more equipment is required, and the measurement is not accurate enough and the speed is slow.4. Use the theoretical formula to determine the diameter of the drilling pipe. According to the theoretical formula of drilling and production management, the diameter of the outer rubber hose can be expressed in Table 2:In the formula: D—the inner diameter of the inner rubber hose for inner and outer rubber hoses; H—the outer diameter of the sealant; γ—the outer length of the inner rubber hose (mm); v——the thickness of the sealant (mm).Installation process: the following items should be paid attention to during installation.

1. In order to ensure that the drilling and production pipe will not be damaged under normal use conditions, the drilling and production pipe should be inspected before installing the drilling and production pipe. Usually includes checking for damage and wear.2. Since the oil high-pressure drilling hose is a special material, its connection usually requires the use of special matching joints.3. According to the type of sealing ring designed on the drilling and production pipe, and in combination with the actual situation of the oil field, install a suitable sealing ring at the connection. During on-site construction, the sealing ring of the drilling-production pipe interface should be kept in its original position.4. When using a special joint for connection, it should be ensured that the joint is parallel to the inner surface of the drilling and production pipe during installation. If there is bending or unevenness, corresponding auxiliary equipment can be used to correct it.5. In order to prevent the oil hose from being corroded, anti-corrosion treatment should be carried out regularly, usually by oiling, zinc spraying and other methods for anti-corrosion treatment. In addition, corrosion inhibitors can also be added to reduce the concentration of oil in high-pressure drilling hoses.