In addition to meeting API standards, tubulars are designed and manufactured to
Huahao’s own internal design and manufacturing
standards which exceed API standards.
API drill pipe specifications
include:
• Sizes: full range from 2 3/8” to 6 5/8”
• Grades: E75, X95, G105 and S135
• Upset type: EU, IU and IEU
• Specification and product level: API SPEC
5DP/PSL1, PSL2, API SPEC 7-2, API RP 7G
• Tool joint (connection): from NC26 to
NC50,51/2FH,6 5/8FH
HUAHAO COMPANY internal specifications:
• Miu ≥ 4.75in. (120mm) and Miu-R ≥ 8in.
(200mm), to reduce the stress concentration
at the internal upset vanishing area and
achieve better anti-fatigue performance;
• High impact toughness value of the drill pipe
body and tool joint for better fracture toughness;
• 100% FLUT+100%FLT (EMI) for drill pipe body;
100% UT+100%MPI for tool joint and welds
Options for optimizing the drill pipe performance:
• Tool joint make and break
• Cold rolling
• Hardbanding
• Internal plastic coating
In addition to API/PSL1 and PSL2 drill pipe, provides high standard drill
pipe for severe condition drilling service
including:
• API /PSL3
• NS-1
• DS-1
• Customers’ specifications
Oil dril pipe