This article provides a structured overview of the fundamental material concepts required for downhole tool design and selection. It clarifies the relationship between grade, material, and designation, and explains how these concepts are applied in the API casing system. The content focuses on the main alloy families used in downhole tools—carbon and low-alloy steels, martensitic and super martensitic stainless steels, duplex and super duplex stainless steels, and Ni-based alloys—and links them to their typical applications and environmental limits, including sour service under NACE MR0175 / ISO 15156. Cross-reference tables between AISI, GB, DIN/EN, and UNS designations are provided, along with quick-reference tables for commonly used tool materials, making the article suitable as a long-term technical reference for engineers involved in casing, completion, and downhole tool engineering, as well as for internal standards and training.

Our latest achievement is the 68mm Tubing Packer—a mechanically set, single-slip service packer designed for use inside 3.5-inch tubing. With a unique tool structure and compact design, this packer is deployed and set using coiled tubing operations. The packer can be reliably set in place by simply slacking off or picking up the tubing string. Once set, it provides a robust high-pressure seal rated up to 7000 psi, enabling effective anchoring of sealant within the tubing. This tool offers an efficient means of performing remedial and stimulation operations—such as treating, testing, acidizing, or zone isolation—without pulling the production tubing. And when emergencies arise, safety is built in. The packer features an emergency release function. In case of unintentional lock-in, it can be safely unsealed by over-pulling or applying overpressure to shear the release pins—ensuring safe recovery and minimizing operational risk.

Directional hydraulic sandblasting perforation provides a precise, controllable, and formation-friendly method to initiate reservoir contact in horizontal wells. By enabling azimuthal targeting and reducing mechanical or explosive damage, this technology significantly improves stimulation efficiency, well integrity, and production performance in complex reservoir environments.

The Hydraulic Impulse Hammer is a fluid-driven high-frequency impact tool designed for coiled tubing operations. It is primarily used for tasks such as scale removal, sleeve shifting, and percussion milling.

We’re pleased to share our newly completed Lead Impression Block order — packed and ready to ship!This versatile tool is widely used by oilfield service teams to detect downhole anomalies, confirm fish shapes, and identify tool impressions with high precision and reliability.At Torrent Oil Tools, we focus on delivering trusted solutions that meet real operational challenges.

Drilling stabilizers are essential components in oil and gas drilling operations, playing a pivotal role in maintaining borehole stability and ensuring efficient drilling. These tools are integrated into the Bottom Hole Assembly (BHA) to prevent borehole deviation, reduce vibrations, and enhance the overall quality of the drilled hole. Various types of drilling stabilizers are employed based on specific operational requirements.