Ahmedabad, Gujarat-380006, India
The drill collars are made of 4145H modified chromium-molybdenum alloy steel acc. to API Spec.7. All threads can be phosphated, copperised or cold ...Beijing Metalwork Petroleum Technology Co., Ltd
The drill collar is according to SY/T5144-2007 and API 7-1 Specification for Rotary Drill Stem Elements standard, the material uses AISI 4145H alloy ...Shanxi Golden Diamond Petroleum Drill Tools Manufacturing Co Ltd
John Lawrie Oilfield offers a wide variety of drill collar sizes from 3 - 9 , spiraled or slick, and with API and premium connections. All our drill ...John Lawrie Inc
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