DRILL PIPE STANDARD NAVIGATOR
API 5DP and ISO 11961 Buyer Guide
API 5DP and ISO 11961 provide the main product framework for steel drill pipe. A usable purchase description must define the pipe body, upsets, weld assembly, tool joints, rotary connection, wear system and required evidence as one component.
Define the pipe body
Nominal size and grade establish only part of the assembled drill-pipe requirement.
- Outside diameter, nominal mass and wall thickness
- E75, X95, G105 or S135 grade as required
- Range and upset configuration
- Internal condition and coating when specified
Complete the tool-joint description
Tool-joint geometry controls strength, hydraulic area, fishing dimensions and compatibility with the drilling system.
- Tool-joint OD, ID and length
- Pin and box dimensions
- Material, heat treatment and weld-zone requirements
- Elevator, tong and fishing interfaces
Name the rotary connection
The connection must be stated by its exact designation and checked against the mating string components.
- API or approved project-specific connection
- Pin and box make-up geometry
- Thread treatment and protectors
- Gauging and dimensional acceptance basis
Coordinate wear protection and inspection
Hardbanding, surface condition and verification should be agreed before manufacture or repair.
- Hardbanding system, location and casing-wear requirement
- Pipe-body, upset, weld-area and tool-joint inspection
- Connection gauging and final dimensional checks
- MTC, NDT, welding, heat-treatment and release records
ENQUIRY CHECKLIST
Information to prepare.
Use this list as an initial procurement guide. The governing design and purchase documents remain authoritative.
Send Your Requirement- 01Standard and applicable edition
- 02Size, nominal mass, grade and range
- 03Upset type and tool-joint dimensions
- 04Exact pin and box connection
- 05Hardbanding and internal coating requirements
- 06Service, inspection, documents, quantity and destination