API Oil Casing Special Thread

At present, oil well pipes (oil pipes, oil casing pipes, and drill pipes) are basically implemented in accordance with API (American Petroleum Institute) standards. However, API casing threads are not suitable for the development of high-pressure gas fields, so many manufacturers have developed special joints with their own characteristics and are protected by patents. Today, Union Steel Industry will introduce some common special thread types for oil casing.

API Buttress Thread (API thread):

This is a common thread type widely used in oil casing and casing joints. It features a low slope, providing good load-bearing capacity and sealing.

API Extreme-Line Thread:

This thread type is specifically designed for downhole operations under high pressures, temperatures and extreme conditions. It has higher load-bearing capacity and sealing performance.

Premium Connection:

This is a high-performance specialty thread used in applications requiring higher quality and reliability, such as deepwater drilling and high-pressure oil wells.

VAM (Vallourec and Mannesmann) Thread:

VAM thread is a well-known special thread connection that is widely used in oil wells under high pressure, high temperature, acidic and corrosive conditions.

Tenaris Hydril Thread:

This is a special thread with excellent sealing and corrosion resistance, used in a variety of challenging underground environments.

Hunting SL HXT Thread:

This thread type is specifically designed for horizontal well drilling and provides excellent load carrying capacity and sealing.

NOV Grant Prideco Thread:

This thread type is commonly used in applications where high strength, high sealing, and resistance to torsion are required.

These special threaded connections are often designed and manufactured by specific manufacturers to meet different application needs and environmental conditions. The selection of appropriate special threaded connections is critical to ensuring the success and safety of downhole operations, so the downhole environment, loading and operating conditions should be carefully considered during selection. These special threaded connections typically follow relevant industry standards and specifications to ensure their performance and quality.