Hilong Flush Hole Drill Pipe

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Product Introduction

Decreasing the hydro pressure loss to improve the hydro-efficiency is the key to improve drilling speed. Shanghai Hilong's proprietary flush-hole drill pipe is designed to be made-up with the drill pipe body using a special external upset with a large ID and the tool joint with Hilong double shouldered connections with a large ID also. The ID of the upset end and the tool joint are almost the same as that of the drill pipe body.

Product Advantage

·Special external upset technics effectively reduce stress concentration on the upset vanishing area, reduce fatigue failure possibility and improve anti-fatigue performance;
·The ID of the tool joint is almost the same as that of the drill pipe body;
·Decreasing annular pressure loss by 20%-50% and improving hydraulic efficiency and drilling speed;
·The flush-hole structure is suitable for continuous coring and wire-line coring.