The composition of drilling tools:

        The drilling tool mainly includes the basic drill string part such as kelly, drill pipe, drill collar, stabilizer, matching joint, etc.

1. Straight well: square drill pipe + protection joint + drill pipe + mating joint + drill collar + stabilizer + drill bit

2. Inclined well: square drill pipe + protection joint + drill pipe + matching joint + weighted drill pipe + drill collar + stabilizer + power drill + drill bit

3. Salvage: There are many forms, depending on different underground conditions

Commonly used salvage: square drill pipe + drill pipe + safety joint + salvage tool (boom, spear, buckle joint, male and female cone, fishing basket, milling tool, etc.)