Descripción del producto
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.
| País: |
China |
| N º de Modelo: |
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| Precio FOB: |
(Negociable)
Obtener el precio más reciente
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| Lugar de origen: |
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| Precio de pedido mínimo: |
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| Cantidad de pedido mínimo: |
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| Detalle de embalaje: |
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| El tiempo de entrega: |
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| Capacidad de suministro: |
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| Tipo de pago: |
T/T, L/C |
| Grupo de productos : |
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