<p style="text-align: center;">&mdash;&mdash;The Core Equipment for Stable Quality of Oil Country Tubular Goods</p> <p>OCTG (Oil Country Tubular Goods), as key materials for oil and gas exploration and development, have extremely high requirements for dimensional accuracy, mechanical properties and surface quality. The cooling bed, a core equipment in the post-processing section of the OCTG steel pipe production line, is specifically designed for the uniform cooling, auxiliary straightening and temporary storage of semi-finished and finished pipes (casing, tubing, drill pipe) after heat treatment (quenching, tempering) or hot rolling. Its reliable performance provides a solid guarantee for the stable quality of OCTG products.</p>

Core Functions & Working Principle

• The core value of the cooling bed lies in realizing slow and uniform cooling of high-temperature OCTG pipes, avoiding performance degradation such as quenching cracks and uneven hardness caused by rapid cooling. The working process is highly compatible with the continuous production rhythm:
• After heat treatment or hot rolling, high-temperature OCTG pipes are accurately transported to the cooling bed through the front-end conveying roller table;
• The cooling bed adopts a chain-driven or step-by-step lifting structure to drive the pipes to move slowly on the bed surface, ensuring full contact between each part of the pipe and the air;
• According to the pipe specifications (especially for large-diameter thick-walled casing), natural air cooling or segmented forced air cooling is adopted to cool the pipes to the required temperature;
• The bed surface is designed with anti-roll baffles and a reasonable slope to prevent pipe sliding, collision and deformation during the movement process;
• After cooling, the pipes are automatically transferred to the subsequent straightening, inspection and other processes to complete the seamless connection of the production line.

Key Features Adapted to OCTG Production Requirements

Wide Specification Adaptability: Targeting the diverse specifications of OCTG pipes (outer diameter φ48-φ508mm, wall thickness 3-50mm), the cooling bed is equipped with adjustable bed surface spacing and movable baffles. It can be flexibly adjusted according to the size of casing, tubing and drill pipe, realizing multi-specification universal use without frequent equipment modification.

Precise Uniform Cooling: Equipped with a segmented air supply system and heat dissipation fins, the cooling speed of the head, middle and tail of the pipe is strictly controlled to be consistent. The hardness, toughness and impact resistance of the cooled OCTG pipes are uniformly distributed, which fully meets the performance requirements of oil and gas well downhole service.

Strict Surface Protection: The bed surface and baffle contact parts are lined with wear-resistant rubber or nylon materials to avoid scratches and dents on the pipe surface. At the same time, the movement speed is stepless adjustable by frequency conversion, which minimizes the friction and collision between the pipe and the equipment, ensuring that the pipe surface quality meets the API standard.

Intelligent Production Line Integration: It supports PLC automatic control and can be seamlessly connected with front-end heat treatment equipment and back-end straightening, flaw detection and sizing equipment. It realizes the automatic linkage of "pipe in-place → cooling start → cooling completion → automatic output", and can be connected to the production line MES system to realize real-time monitoring of the cooling process and data tracing.

High Reliability & Stability: The main body is made of Q355B high-strength steel plate through integral welding and heat treatment, with strong load-bearing capacity and deformation resistance. The key transmission components (chain, sprocket, bearing) adopt heavy-duty wear-resistant models, with a service life of more than 50,000 hours, effectively reducing the downtime of the production line.

Common Types & Matching Scenarios

Customizable Parameters

Daily Maintenance Focus

• Regularly check the wear of bed surface lining, chain and sprocket, and replace worn parts in time to avoid pipe surface damage and transmission failure;
• Calibrate the frequency converter and position sensor regularly to ensure the stability of cooling speed and pipe positioning accuracy;
• Clean the air duct, heat dissipation holes and bed surface of the forced cooling system regularly to prevent dust accumulation from affecting the cooling effect;
• Regularly add lubricating oil to the transmission components to reduce friction and extend the service life of the equipment.

Application Scenarios

It is widely used in the post-processing section of OCTG steel pipe production lines, including but not limited to: quenching and tempering cooling of casing and tubing, preliminary cooling of drill pipe after hot rolling, temporary storage and transfer of semi-finished pipes before straightening, etc. It is an indispensable core auxiliary equipment for OCTG manufacturers to improve product quality and production efficiency.