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Thirty-minute abrasion tests were conducted with a modified Hamilton Beach BIZANTI MOHAMEDADSANI EBRAHIM

The anti-abrasion connector is simple in structure, low in manufacturing cost and capable of effectively reducing the friction torque of a drill stem;

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The invention provides an anti-abrasion device for a drill pipe and a casing pipe. The anti-abrasion device consists of a metal frame, a rubber sleeve

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