Comprehensive Overview of Drill String Composition and Connection Types – Your Reliable Partner for High-Quality Drilling Tools
At WELONG, we are dedicated to providing high-quality and reliable drilling tools to meet the diverse needs of the oil and gas industry. Our drill strings are manufactured in strict compliance with API (American Petroleum Institute) standards, ensuring superior performance, durability, and safety. Below, we introduce the composition, structure, and connection types of drill strings, highlighting the advantages of our products.
✅ 1. Drill String Composition
A drill string typically consists of three main sections:
- Square Kelly: Traditionally used in rotary drilling rigs to transfer rotary motion. However, with the advancement of top drive technology, square kellys are gradually being phased out.
- Drill Pipe Section: Includes drill pipes and tool joints and may sometimes be equipped with a reamer.
- Bottom Hole Assembly (BHA): Consists of drill collars and may also include stabilizers, shock absorbers, jars, reamers, and other specialized tools, depending on the drilling objectives and requirements.
Post time: Apr-03-2025
