Drill Pipe & Tools

Drilling Sub

Bottom Hole Assembly (BHA)

API 7-1

Drilling Sub is supplied to API 7-1. Available in AISI 4145H/4137. Size range: OD 3⅛″–9½″. Typical application: crossover / lift / saver subs. Made to order with full mill certification (EN 10204 3.1) for oil & gas projects across Iran and the Gulf.

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Specification
Standard	API 7-1
Grades / classes	AISI 4145H/4137
Sizes / range	OD 3⅛″–9½″
Sub-category	Bottom Hole Assembly (BHA)
Category	Drill Pipe & Tools
Application	crossover / lift / saver subs