API 7-1 Drill Collars

Provide weight on bit (WOB) and maintain directional control during drilling operations.

Specification Details
Standard API 7-1, NS-1
OD Range 3-1/8″ to 14″
Connection Types API Regular (REG), API Full Hole (FH), API Internal Flush (IF), NC, H90
Material AISI 4145H Modified, AISI 4140
Features Slick, Spiral, or Non-Magnetic (P550 & P650 Austenitic)

Sub-Products:

· Slick Drill Collars
· Spiral Drill Collars
· Non-Magnetic Drill Collars (Monel / Inconel)
· Short Drill Collars (Pony Collars)
· Flex Collars
· Square & Hexagonal Kellys