smooth drilling.
Casing pipe
OD:4-1/2"-20"
Connection:BTC LTC STC etc
Steel grade:J55 K55 N80 L80 P110 etc
Standard:API5CT
Our Services/Warranty
As a professional manufacturer, we provide follow services:
1.Lower price
2.ONE year warranty and life time maintenance
3.In time delivery.
4.High Quality assurance..
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