1) Standard: API Spec 5D

2) API and ISO certified

3) Specification:  2-3/8'', 2-7/8'', 3-1/2'', 4'', 4-1/2'', 5'', 5-1/2'', 6-5/8''

4) Steel Grade:  E75, X95, G105, S135

5) Upset Form: EU, IU, IEU

6)Description :

This type of drill pipe have optimal bearing design, it can be working stably in high WOB, and the qualtiy tungsten carbide inserts on cone and the gauge make a good wear resistance, largely extending the working life of bits. It is suitable for medium to hard formation.

7)Features:

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

8)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

9) 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

10) Parameter