architetto in vacanza Patrocinare spiral drill collar gioco dazzardo regola Persona malata
8' O. D. X 2 13/16' ID, 6 5/8 Reg, 150 Ppf Spiral Drill Collar: 8 1/4' Outside Diameter X 2 13/16' Inside Diameter, with Slip Recesselevator Recessno Hard Band - China
4145H & Non Magnetic Spiral & Slick Drill Collars, Length: 5'-31'
Non-Magnetic Drill Collar
What is a Drill Collar
Spiral drill collar with elevator groove and slip groove
New 8-1/2" OD Spiral Drill Collar, Range II for Sale in New Iberia, Louisiana