Get in touch with Welong Company
Category Welong

Overshot vs. Junk Basket: A Field Selection Guide
Quick Selection Criteria Before picking an overshot or a junk…

How Drilling Mud Motors Work in Directional Drilling
Drilling Mud Motor Field Guide (2026): Components & Limits Downhole…

Drill Pipe: Grades, Sizes, Standards, and How Classification Works
Quick Specs Outer Diameter Range 2⅜” to 6⅝” / 60.3mm…

Drill Collar: How It Works, Types, Specifications, and BHA Placement Rules
Quick Specs Material AISI 4145H chrome-molybdenum alloy steel, Brinell 285-341…

Drilling Jar Misfires: A Field Diagnostic for Hydraulic and Mechanical Jars That Won’t Fire
Updated July 2026 Drilling jars that won’t fire are a…

Heavy Weight Drill Pipe: Specifications, Types, and How to Select the Right HWDP
Quick Specs OD Range 3½” – 6⅝” Position in Drill…




