FOB Price
Obtener el precio más reciente2000 ~ 2500 / Ton ( Negotiable )
|Minimum Order
Place of Origin:
Henan China
Price for Minimum Order:
Minimum Order Quantity:
20 Ton
Packaging Detail:
as customer's request
Delivery Time:
within 35 days
Supplying Ability:
5000 Ton per Month
Payment Type:
T/T, L/C, D/A, D/P, Western Union, Money Gram
Persona de contacto Ms. judy
15 F no 3 building Futian Fortune plaza Shanghai east road zhengzhou city , Zhengzhou
Drill collars are trepanned and
drifted to API Spec 7. Full-length heat-treatment processes ensure
that mechanical properties meet or exceed API Spec 7 requirements.
A hardness range of ******1, Brinell Hardness and Charpy ¡°V¡±
notch minimum impact strength of *0 ft-lb at *0OF are guaranteed
one inch below the surface.
Traceability:
Drill collar material and process traceability are maintained from
receipt of mill¡¯s certified raw material to completion of all
the manufacturing. Serial numbers are die stamped on bar
bodies.
Rigid Inspection Procedures:
We inspect all our drill collars to comply with API standards .
These inspections include visual dimensional checks as well as
ultrasonic inspections over the entire body of the drill
collar.
Cold Rolling:
Drill collar thread roots, as well as elevator recess upper radius,
are cold-rolled. Cold rolling creates a compressive recess upper
radius stress condition that increases fatigue life by minimizing
crack initiation.
Phosphate-coated or copper plating:
All connections are phosphate-coated or copper plating to improve
resistance to corrosion.
Slip groove. elevator groove and size:
Our company offers optional slip and elevator recesses to improve
handling efficiency and safety. Unless otherwise specified, slip
and elevator recesses are machined in compliance with API RP 7G
guidelines.
Thread protectors:
Our company offers steel and cast steel and plastic steel thread
protectors for its drill stem products.
NO. |
Specification |
OD (D) |
ID (d) |
Length (L) |
Joint type |
Weight |
|||
(mm) |
(inch) |
(mm) |
(inch) |
(mm) |
(ft) |
||||
1 |
6 1/4 |
**9 |
6 1/4 |
*1.4 |
2 *3/*6 |
***4 |
*0 |
NC*6 (4IF) |
***2 |
2 |
6 1/2 |
**5 |
6 1/2 |
*1.4 |
2 *3/*6 |
***4 |
*0 |
NC*6 (4IF) |
***0 |
3 |
7 |
**8 |
7 |
*1.4 |
2 *3/*6 |
***4 |
*0 |
NC*0 (4 1/2IF) |
***9 |
4 |
8 |
**3 |
8 |
*1.4 |
2 *3/*6 |
***4 |
*0 |
6 5/8 REG |
***4 |
5 |
9 |
**9 |
9 |
*1.4 |
2 *3/*6 |
***4 |
*0 |
7 5/8REG (or NC*1) |
***7 |