In shale oil and gas and deep oil and gas development, acid fracturing and sand fracturing are the core processes for reservoir transformation and releasing production capacity. In the homework, acid based fracturing fluid containing 28% hydrochloric acid and hydrofluoric acid is mixed with high hardness proppants such as quartz sand and ceramic particles, and injected into the formation under ultra-high pressure of 15000psi - this process forms a dual limit test of "chemical corrosion+abrasive erosion" on the conveying hose. In such working conditions, ordinary hoses may fail due to acid corrosion swelling or abrasive cutting when the number of inner lining layers is small. The ultra wear-resistant, acid and alkali resistant fracturing hose is a professional solution for this extreme working condition - using the chemical inertness of UPE lining to resist strong acid erosion, using multi-layer high-strength steel wire winding to carry ultra-high pressure pulses, and using equal diameter design to ensure high flow transmission efficiency, becoming a reliable channel for "acid resistance, pressure resistance, and wear resistance" in shale gas fracturing operations. 1、 UPE lining: a "dual resistance barrier" resistant to 28% hydrochloric acid and 8000 hours of wear The damage of fracturing fluid to the inner wall of the hose includes two dimensions: the concentration of hydrochloric acid in the acidizing fracturing fluid can reach 15-28%, which is highly corrosive; The quartz sand proppant carried by the sand fracturing fluid (with a concentration of up to 30%) flushes the inner wall at a speed of several meters per second, forming a typical liquid-solid two-phase flow erosion. The service life of ordinary rubber lining in this type of "acid corrosion+abrasion" composite working condition is measured in "hours". UPE (ultra-high molecular weight polyethylene) lining is the material solution for this dual impact. The main chain of UPE molecules is composed of saturated carbon carbon single bonds, without unsaturated bonds or polar groups that are susceptible to chemical attacks. It has stable tolerance to 28% hydrochloric acid at room temperature of 20 ℃ and can safely transport acid based fracturing fluids without pressure. In terms of wear resistance, UPE has a molecular weight of millions, and its molecular chains convert the impact energy of abrasive particles into intermolecular frictional heat energy through a "slip rearrangement" process, rather than directly damaging the molecular chain structure. The fracturing hose lined with UHMWPE imported from Germany/Japan can withstand continuous wear for 8000 hours under high-pressure sand acid conditions, with a 300% improvement in wear resistance compared to conventional products. For sand fracturing fluids containing quartz sand (20-40 mesh), this wear-resistant redundancy eliminates the need for hose replacement during the single well fracturing operation cycle, significantly reducing the risk of operation interruption. 2、 Multi layer steel wire winding: "mechanical skeleton" for 15000psi working pressure 15000psi (approximately 105MPa) is a typical working pressure for deep shale gas fracturing. The API 7K standard requires a verification pressure of 1.5 times the working pressure (22500psi) and a burst pressure of not less than 4 times the working pressure (60000psi). The ability to withstand this pressure level depends on the precise structural design of the reinforcement layer. The reinforcement layer adopts a 4-10 layer high strength ultra flexible steel wire or steel wire rope alternating spiral winding structure. Adjacent layers are wrapped in alternating directions to form an "interlocking" mechanical skeleton - the inner steel wire provides radial support at a higher angle to resist tube swelling under ultra-high pressure; The outer steel wire constructs an axial tensile skeleton at a lower angle to prevent excessive elongation of the hose under pulse pressure. The interlayer is firmly integrated through a high adhesive layer, which evenly distributes stress in the multi-layer structure and avoids interlayer delamination caused by stress concentration. Taking the 2-inch 15000psi specification as an example, the precision design of the reinforcement layer allows for a working pressure of 15000psi, a test pressure of 22500psi, and a burst pressure of 40000psi (approximately 276MPa). The minimum bending radius is controlled at around 1000mm, taking into account the flexibility requirements of ultra-high pressure bearing and on-site pipe laying. The product complies with API Spec. 7K FSL0 standard and has obtained ABS classification society certification. Each hose is equipped with a unique traceability code to achieve full lifecycle quality monitoring. 3、 Adaptation to Sand Fracturing Scenarios: System Integration of Full Diameter Design from Efficiency to Safety UPE ultra wear-resistant and acid alkali resistant hoses demonstrate multidimensional technical value in shale gas fracturing operations, with full bore and equal bore design as the core, balancing installation efficiency, operational safety, and full cycle economy. The equal diameter full flow design eliminates inner wall steps and shrinkage, minimizes flow resistance when the proppant passes through, reduces turbulence and energy loss, and improves the efficiency of fracturing fluid transportation. This design directly reduces the pumping energy consumption of the fracturing truck group, while avoiding the risk of proppant accumulation and blockage at pipeline joints. The comparative advantage with traditional steel pipes reflects the technical value of "replacing steel with flexibility". Compared with traditional steel pipes, the efficiency of hose installation has been more than doubled, and costs have been saved by 70%; The hose adopts integral union or integral flange joints, with fewer single connection points, avoiding the risk of high-pressure leakage caused by multiple elbow connections in steel pipes. The weight is only 30% of the same specification steel pipe, greatly reducing the difficulty of lifting and handling on the job site. The pulse fatigue life ensures the long-term reliability of frequent "pressurization holding depressurization" cycles in hydraulic fracturing operations. The multi-layer winding structure ensures that the hose does not fail under high pressure pulses (more than 5000 times). The industry data of over 2 million hours of cumulative safe operation, as well as successful applications in projects such as North American shale gas fields, Middle Eastern oil fields, and Chinese shale gas demonstration zones, have verified the reliability and adaptability of this product in the entire fracturing operation scenario. In summary, the ultra wear-resistant and acid alkali resistant fracturing hose, with its UPE lining's resistance to 28% hydrochloric acid and 8000 hours of wear resistance, 15000psi ultra-high pressure bearing capacity with 10 layers of steel wire alternating winding, and API 7K certification and full bore design for operational efficiency, perfectly meets the systematic requirements of shale gas fracturing operations for "acid resistance, anti-wear particles, and high pressure bearing". From the chemical inertness of 28% hydrochloric acid to 8000 hour wear resistance verification, from 15000psi working pressure to 40000psi blasting redundancy, from North American shale gas fields to Chinese shale gas demonstration areas, the design and selection of every layer of steel wire and every micron of UPE lining all point to the same goal: to provide safe, reliable, and durable flexible support for efficient transportation of fracturing fluid and proppants in reservoir transformation thousands of kilometers underground.