Introduction

In oil drilling and well repair operations, the high-pressure mud pumping system is the core link to ensure drilling efficiency and safety. As a key component in this system, the LT301D API 7K Series Rotary Drilling and Shock Absorbing Hose is widely used in the connection between the riser and the top drive, the rotary device and the mud pump, providing reliable flexible connection and high-pressure mud delivery capacity for drilling operations. This article was written by Liwang Fluid Technology Department on March 12, 2025, and will deeply explore and analyze the characteristics, application scenarios, structural design and important role of the LT301D hose in oil drilling.

 

 

1. Application Scenarios

The LT301D API 7K series hose is designed for oil drilling and well repair operations, and is mainly used in the following scenarios:

 

• Riser upper end connection: Connect the upper end of the riser with the top drive or rotary device to reduce vibration and shock.
• Riser lower end connection: Connect the mud pump to the lower end of the riser to ensure smooth delivery of high-pressure mud.
• High-pressure mud pumping: Withstand high-pressure mud pumping in oil drilling to ensure operational continuity.

 

2. Product features and structural design

LT301D hose performs well in high-pressure and high-vibration environments with its excellent materials and structural design:

 

2.1 Materials and structure

 

• Inner layer material: Made of NR&SBR synthetic rubber, HNBR, UPE or PTFE, it has oil resistance, high temperature resistance, corrosion resistance and other characteristics, and is suitable for a variety of drilling environments.
• Reinforcement layer: 2-6 layers of high-strength ultra-flexible steel wire or wire rope winding, providing excellent pressure resistance and fatigue resistance.
• Outer layer material: Wear-resistant and weather-resistant synthetic rubber, resistant to mechanical wear and environmental erosion.

 

2.2 Performance parameters

 

• Temperature range: -20℃~+121℃ (-4℉~+250℉), adaptable to extreme temperature environments.
• Implementation standard: Meets API Spec. 7K standard, ABS certified, ensuring high reliability.
• Connector type: Integral union or integral flange connector to ensure a firm seal.

 

3. Core role in oil drilling

LT301D hose plays an important role in drilling operations:

 

• Shock absorption and impact resistance: Flexible design absorbs vibration and impact to protect equipment.
• Efficient mud transportation: High pressure tolerance ensures stable mud transportation.
• Improved safety: Wear resistance and corrosion resistance reduce the risk of leakage and failure.

 

4. Installation and maintenance guide

To ensure the performance and life of the hose, please note:

 

• Correct installation**: Install according to the bending radius to avoid excessive bending or twisting.
• Regular inspection**: Check the appearance and joints, and deal with wear or leakage in time.
• Timely replacement**: Replace aging or damaged hoses to avoid interruption of operation.

 

5. Related data reference

The following is a performance data reference table related to LT301D hose:

 

 

Through the above data and performance parameters, the efficiency and reliability of LT301D API 7K series hose in oil drilling are fully reflected.