Kelly pipe hose and cementing hose usage and implementation standards

 Kelley hoses and cementing hoses are commonly used equipment in the oil drilling industry. They have their own classifications, uses, implementation standards and related technical parameters.

1. Classification of kelly hoses

Kelly hoses are mainly divided into two categories: single-layer kelly hoses and multi-layer kelly hoses. Single-layer kelly hose is composed of a single layer of steel wire braid and a rubber outer layer, while multi-layer kelly hose is composed of multiple layers of steel wire braid and rubber outer layer. In addition, kelly hoses are divided into standard and heavy-duty types according to different use occasions.

2. Purpose of kelly hose

The kelly hose is mainly used to connect the kelly pipe and the column to transmit mechanical energy, and has the characteristics of tensile resistance, compression resistance and bending resistance. During the drilling process, the kelly hose needs to withstand frequent tension and compression, so its reliability is very important.

3. Execution standards for kelly hoses

The manufacturing and inspection standards of kelly hoses mainly refer to GB/T 11653-2009 "kelly joints, kelly and couplings for oil drilling" and API Spec 4F "kelly for rotating systems of drilling equipment and auxiliary equipment" . These standards clearly stipulate the material, structure, performance and other aspects of square drill pipe hose.

4. Technical parameters of kelly hose

1. Outer diameter: Depending on different specifications, the outer diameter of the kelly hose is usually between 140mm and 380mm.
2. Inner diameter: The inner diameter of the kelly hose varies according to different specifications, generally between 120mm and 340mm.
3. Length: The length of the kelly hose is determined according to actual needs, generally between 5m and 10m.
4. Steel wire braided mesh: The kelly hose is made of high-strength, high-toughness steel wire braided. The braided mesh has high tensile strength and wear resistance.
5. Rubber outer layer: The outer layer of the kelly hose is wrapped with a highly elastic rubber outer layer. This rubber outer layer can increase the flexibility and wear resistance of the hose, and can also seal and protect it. effect.
6. Joint connection method: The joints of kelly hoses are usually threaded, with two common forms: tapered thread and straight thread. The tapered thread connection is tighter and can withstand greater tension and pressure; the straight thread is more convenient and fast, and is suitable for occasions that require frequent disassembly and assembly.
7. Weight: Because there are more steel wires braided inside the kelly hose, it is relatively heavy. Weight typically ranges from tens to hundreds of kilograms, depending on specifications and materials.
8. Working temperature: Kelly pipe hose can operate at different working temperatures, and the generally tolerable temperature range is between -20°C and +80°C.
9. Pressure level: Depending on different usage occasions and specifications, kelly hoses can withstand different pressure levels. Common pressure levels include 10,000psi, 20,000psi, 30,000psi, etc.
10. Color coding: For ease of identification and use, kelly hoses are often color-coded on the outside. Common color markings include white, black, red, etc.
In short, kelly hoses and cementing hoses are commonly used equipment in the oil drilling industry and have their own classifications, uses, implementation standards and related technical parameters. In actual use, it is necessary to select the appropriate type and technical parameters according to the specific situation to ensure the reliability and safety of the equipment









Leave a Message