OCTG
Drill Collar
Solid alloy steel bar drill collar, quenched and tempered, bored, punched and threaded, adding weight to the drill string.
Specifications
- Size
- OD: 60.32mm ~ 168.28mm; WT: 7.11mm ~ 9mm; Length: R1, R2, R3
- End
- Thread, NC, IF, FH, REG
- Type
- Seamless (SMLS), Electric Resistance Welded (ERW)
- Hardness
- 285–341
- Impact strength
- min Charpy V notch 40 FT-LB at 70 °F
- Connection range
- NC 23-31 (3-1/8 in. OD, 22 lb/ft) up to 8-5/8 API Reg (11 in. OD, 300 lb/ft)
- Surface
- Anti-corrosion&water Based Paint
- Standards
- API 5DP; API Spec 7-1 / SY5144-2007; API Spec 7-2 (stress-relief features); API RP7G (connection dimensions)
Product Overview
Solid alloy steel bar drill collar, quenched and tempered, bored, punched and threaded, adding weight to the drill string. Made from solid alloy steel bar, quenched and tempered, then bored, punched, and threaded. Spiral (grooved) OD design promotes uniform drilling-fluid flow, balances pressure, reduces differential-pressure sticking.
Specifications and Standards
Specification highlights: Size OD: 60.32mm ~ 168.28mm; WT: 7.11mm ~ 9mm; Length: R1, R2, R3; End Thread, NC, IF, FH, REG; Type Seamless (SMLS), Electric Resistance Welded (ERW); Hardness 285–341; Impact strength min Charpy V notch 40 FT-LB at 70 °F. Standards: API 5DP; API Spec 7-1 / SY5144-2007; API Spec 7-2 (stress-relief features); API RP7G (connection dimensions).
Applications and Ordering
Oil & gas drilling (OCTG category) Adds weight to the drill string and transmits pumping/drilling fluid. Send your requirement for a quotation.