Introduction
The document provides technical details about the use and specifications of a drilling tool known as the 'trilame'. It is commonly used in very soft to moderately hard formations where traditional down-the-hole hammers like the tricone become less effective. The cleaning of the borehole is achieved through air or water injection.

Types of Trilame
There are two forms of trilames:

• 'Sapin' shape for soft terrains
• 'Chevron' shape for moderately hard terrains

Technical Specifications
The document lists various diameters and corresponding thread types for the trilame. The diameters range from 64 mm to 444 mm, with different thread types such as N ROD 2"3/8REG, 3"1/2REG, 4"1/2REG, and H41. The table indicates which thread type is applicable for each diameter.

Important Note
Technical specifications are subject to change without notice.

Category
The trilame is categorized under drilling equipment.