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Non-rotating protector: Ordinary drill protectors are all fixed on the drill pipe and rotate with the drill pipe. In order to reduce the friction from the rotary drill pipe and upper casing in the horizontal well and extended reach well, we develope the NRPs with the drill pipe rotating while it holds still when drilling. NRPs ensure minimal casing wear, increased stability and reduced shock and vibration in the drill string. It consists of four parts, sleeve, upper thrust collar, lower thrust collar and alloy steel bolts.
url:http://www.sunflowermech.com |
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