الوصف
Materials:
Drill collars are manufactured from
AISI***5H modified steel and are supplied in the “as rolled”
surface finish condition. Alternative surface finishes can be
provided.
Trepanning and heat
treatment:
Drill collars are trepanned and
drifted to API Spec7, full-length heal-treatment processes ensure
that mechanical properties meet or exceed API Spec 7
requirements. A hardness range of ******1. Brinell hardness and
charpy *0℃±5℃ cnotch
minimum impact strength of *0 ft-lb at **0F are guaranteed one
inch below the surface.
Traceability:
Drill collar material and process
traceability are maintained from receipt of 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
increase 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.
| بلد: |
China |
| نموذج رقم: |
-
|
| سعر فوب: |
(قابل للتفاوض)
أحصل على آخر سعر
|
| الموقع: |
- |
| سعر الحد الأدنى للطلب: |
- |
| الحد الأدني للطلب: |
- |
| تفاصيل التغليف: |
- |
| موعد التسليم: |
- |
| القدرة على التوريد: |
- |
| نوع الدفع: |
T/T, L/C |
| مجموعة المنتج : |
- |
