Dia:520-3000mm
Materials: Q355B
Kelly box: 130/150/200/250mm
Wear protection: Hard facing or wear strips
Application：Backfill,strength up to medium rock, gravel, boudler.
Features：
Shell height: as customers request, the space between the double shell based on actually needs.
Teeth: B47K22 or B40K12 or upon request.
Wear protection: Hard facing-Wear strip-Betek Stungstuds upon request
Structure: Inner shell drilling first, then the outer shell cutting ring with rock bits drilling to release rock pressure.
Parameters
Workshop & Producing line
Welding details
Quality control
Package & Delivery
What we suppply?
Get the professional solution of customized Casing pipe,Kelly bar,Drilling tools,Used drilling rig, we believe the Guaranteed quality at Reasonable price win us a long cooperation.
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