The core component of the lower drilling string assembly is located below the drill pipe and above the drill bit; it features a thick wall thickness, substantial weight, and high rigidity. Its function is to apply a downward thrust to the rotating drill bit, enabling more efficient penetration of the ground surface. Standard steel drill collars and non-magnetic drill collars are available.
A conventional standard drill collar, featuring a circular, straight outer surface. It is predominantly employed in vertical and conventional wells.
It performs the same function as a standard smooth drill collar. Its primary advantage lies in its specialized structural design, featuring a helical groove on its outer surface that reduces the contact area between the outer diameter and the wellbore wall while allowing drilling fluid to flow freely around the drill collar – thereby reducing the likelihood of differential pressure-induced jamming.
Manufactured from special alloy steel with low permeability, it is primarily used to mitigate magnetic interference during underground surveying operations (e.g., when using magnetic measurement instruments such as compasses), particularly in directional and horizontal wells.
High-strength specialized alloy steel substrate manufactured using an integral dense forging process, offering high strength and toughness to withstand drilling pressure, torque, and impact loads.
Utilizing an austenitic non-magnetic alloy steel with a relative permeability ≤ 1.010, this material eliminates inherent ferromagnetic interference, thereby mitigating the risks of target deviation and adjacent well collisions, and meets the trajectory control requirements for directional and horizontal drilling operations.
API standard high-precision threads; optimized sealing design; unified structure; high interchangeability.
We offer standard and non-magnetic drill collars, providing customers with a wide range of product options to meet diverse operational requirements.
The product is exported to numerous countries, featuring mature and reliable performance with positive market feedback.
Providing high-quality, fast service with 24/7 availability and prompt response – fast service.
