I. Product Overview: Special Rotary Hose for Oilfield Kelly Drilling
Oilfield Kelly Drilling
Rotary Hoses are high-pressure flexible transmission components specially developed and produced for oilfield kelly drilling operations, also known as
kelly rotary hoses or
drilling mud rotary hoses. They are the core hub connecting the kelly, swivel, mud pump and standpipe in the oilfield drilling circulation system. Strictly complying with API 7K, API 16C and other oilfield industry standards, these hoses have excellent high-pressure resistance, anti-rotation and anti-pulse performance. They are mainly used for the flexible transmission of high-pressure mud, drilling fluid and high-pressure water during oilfield kelly drilling operations, adapting to various onshore and offshore oilfield kelly drilling conditions. They can withstand high-frequency rotation, pressure fluctuations and harsh environment erosion during drilling, ensuring continuous, safe and efficient drilling operations, and are indispensable key equipment for oilfield kelly drilling. Their working pressure ranges from 2000PSI to 15000PSI, with an inner diameter of 2-6 inches, a working temperature range of -40℃ to 121℃, and a burst pressure of not less than 3 times the working pressure, fully meeting the high-pressure and high-frequency rotation operation needs of oilfield kelly drilling.
II. Structural Characteristics: Suitable for Kelly Drilling Needs, Balancing Flexibility and Durability
The structural design of Oilfield Kelly Drilling Rotary Hoses is fully adapted to the high-frequency rotation and high-pressure transmission characteristics of oilfield kelly drilling. It adopts a multi-layer composite reinforcement structure, with each layer working together to ensure flexible rotation performance while improving overall durability and safety. The inner tube is made of HNBR or UPE special synthetic rubber that is resistant to drilling mud, high pressure and wear. Processed by a special vulcanization process, it has excellent oil resistance, acid and alkali resistance and erosion resistance, which can withstand the erosion of high-pressure drilling mud and drilling fluid for a long time, avoid aging, cracking and damage of the inner rubber, ensure no leakage during transmission, and eliminate drilling safety hazards caused by mud leakage. As the core force-bearing structure, the reinforcement layer adopts a 4-6 layer high-strength super flexible steel wire spiral winding process. The steel wire is made of high-toughness and high-strength galvanized material, with uniform winding density and consistent tension. The alternating winding method greatly improves the high-pressure resistance, pulse resistance and anti-rotation fatigue performance of the hose, which can adapt to the high-frequency rotation condition of dozens of revolutions per minute during kelly drilling, buffer the pressure fluctuation caused by high-pressure mud transmission, and extend the fatigue service life of the hose. The outer cover is made of wear-resistant, weather-resistant and ozone-resistant synthetic rubber, added with anti-static and flame-retardant additives, which can not only effectively resist mechanical friction, rock impact and dust erosion at oilfield drilling sites, but also adapt to high and low temperature changes in onshore oilfields and salt spray erosion in offshore oilfields. At the same time, it has good flexibility and anti-torsion performance, which is convenient for flexible swing during kelly rotation operation and protects the inner structure from damage. The joints are made of special carbon steel or stainless steel for oilfields, treated with anti-corrosion and wear resistance, and adopt an integrated pressing process with the hose main body, with firm connection and reliable sealing, adapting to the high-frequency rotation and high-pressure working conditions of kelly drilling, eliminating the hidden dangers of joint falling off and leakage, and complying with the strict requirements of API 7K standard for oilfield drilling hose joints.
III. Operating Conditions: Suitable for Various Oilfield Kelly Drilling Scenarios with Outstanding Adaptability
Oilfield Kelly Drilling Rotary Hoses are mainly suitable for various onshore and offshore oilfield kelly drilling operation scenarios. With excellent structural performance and environmental adaptability, they have become the core guarantee for oilfield drilling operations. In onshore oilfield kelly drilling scenarios, whether it is conventional oil and gas drilling, shale gas drilling or tight oil drilling, the hose can adapt to the rotation operation needs of different types of kellys, connect the kelly and swivel, realize flexible transmission of high-pressure mud, withstand high and low temperature fluctuations, dust erosion and mechanical collision in onshore oilfields, adapt to various onshore drilling environments such as deserts, gobi and plains, and ensure continuous drilling operations. On offshore oilfield drilling platforms, the hose can withstand high marine humidity, salt spray erosion and mechanical shaking caused by wind and waves, adapt to the high-frequency rotation condition of offshore kelly drilling, and is used for flexible connection between mud pump and standpipe, kelly and swivel, ensuring stable transmission of high-pressure mud under bumpy and rotating conditions, adapting to various offshore drilling scenarios such as shallow sea and deep sea. In addition, the hose can also be used for oilfield kelly workover operations, adapting to the high-pressure mud transmission and low-frequency rotation needs during workover. It can be customized into full specifications of 2-6 inches according to drilling equipment models and working pressure requirements. Each hose has passed strict pressure tests, rotation fatigue tests, leakage tests and mud erosion resistance tests, with traceable quality, fully complying with API 7K and API 16C standard requirements, and can effectively cope with various complex conditions of oilfield kelly drilling, providing reliable flexible transmission guarantee for the safe and efficient development of oilfield drilling operations.
