Main feature:

A. The drill rods comply with the provisions of  API SPEC 5D & API SPEC7.

B. The grade of steel are determined according to the requirements of Group 1 & Group 3 of API SPEC 5D.

C. Drill pipe joints at the same level comply with the provisions under the Standard API SPEC 7.

 

Drill Pipe Feature:

A. High precision in size and shape

B. Good low temperature toughness

C. Excellent comprehensive mechanical properties

D. High connection strength and sealability

E. Large inside diameter of tool joint

F. High  torque resistance

G. High fatigue strength and long fatigue life

 

Internal Coating Feature:

A.High abrasion resistance and low friction factor

B. Good adhesion and flexility

C. High application temperature and pressure

D. High hardness and impact resistance

E. Good corrosion resistance

 

Hardbanding Feature:

A. Good balance between antiwear and friction-reduction

B. The wear rate is less than 6% of that of bare tool joint, which can prolong 3 times of the

    tool joint service life

C. Good property of friction-reduction, which can reduce the casing wear to the least, and its

    wear to casing is less than 11% of that of bare tool joint

D. Reduce the torque of drilling string

E. Good weldablity with little splash and good rewelding preformance

F. Friendly to environment