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        致力打造自己的品牌

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        提升產品質量

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        年銷售鉆具250,000件以上

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        回轉鉆具

        產品型號:

        產品分類:


        產品特點

        回轉鉆進由頂部驅動的鉆頭運用向下排入的空氣進行鉆進。由液壓鉆子或方鉆桿驅動提供回轉力。鉆頭在鉆進時被固定到鉆柱上由其帶動旋轉,通過補給氣壓和回轉扭力碎巖,巖渣由壓縮空氣、泥漿或泡沫排除,它們隨鉆柱內部持續循環進入鉆頭的水孔或噴嘴,從鉆桿和孔壁間的環形空間向上排。

        產品詳情


        回轉鉆進:

        回轉鉆進由頂部驅動的鉆頭運用向下排入的空氣進行鉆進。由液壓鉆子或方鉆桿驅動提供回轉力。鉆頭在鉆進時被固定到鉆柱上由其帶動旋轉,通過補給氣壓和回轉扭力碎巖,巖渣由壓縮空氣、泥漿或泡沫排除,它們隨鉆柱內部持續循環進入鉆頭的水孔或噴嘴,從鉆桿和孔壁間的環形空間向上排。

        給進氣壓和回轉轉速決定著進尺速度和施工效率。通常軟巖用低風壓配高轉速、硬巖用高風壓配低轉速。

        回轉鉆進通常用來鉆鑿大直徑爆破孔或進行深孔施工,在中軟巖層上施工效果最好?;剞D鉆進代表性的用途是水井、油井、勘探、地熱勘查和大型露天采礦作業。

        回轉鉆頭:

        合適的鉆頭能有效地實現進尺和鉆頭壽命的最佳化,故鉆頭是回轉鉆具的核心。選擇回轉鉆頭最需考慮的是最佳的進尺效率、鉆進壽命和性價比。此外,鉆頭選擇還取決于鉆進用途、巖層類型和可鉆性、拍渣方式和施加到鉆頭的鉆壓。

        回轉鉆頭基本上分四種:刮刀鉆頭,牙輪鉆頭,巖芯鉆和復合片鉆頭(巖芯鉆和復合片鉆頭信息請查閱另一章節)。

         

         

        Rotary Drilling:

        In the rotary drilling mechanism, the hole is drilled by a top drive rotating bit to which a pull-down pressure is applied. A hydraulic rotary head or kelly-stem drive provides rotation. The bit is fastened to, and rotated by, a drill string in drilling progress. Feed pressure and rotary torque crush and grind the rock while debris and cutting is flushed from the hole by compressed air, mud or foam, which continuously circulated down the inside of the drill string through water-ways or nozzles in the bit, and upward in annular space between the drill pipe and bore hole.

        Feed pressure and rotation rate determines penetration and efficiency. And usually, soft rock requires lower feed pressure and faster rotation speed, while harder rock requires high feed pressure and slower rotation speed.

        Rotary drilling is generally used for large-diameter blast-holes or for deep hole drilling and is most effective in soft to medium rock. Water and oil wells, exploration drilling, geothermal research and large open-pit mine drilling operations are typical rotary applications.

        Rotary Drill Bits:

        Optimum bit styles maximize penetration rate and bit life. So the core of all rotary drill strings is the bit. The most concern in selecting a rotary drilling bit should be to ensure optimum penetration rate, service life and cost effectiveness. Besides, bit selection is oriented by the drilling application, type and drillability of rock to be drilled, the type of flush to be used and the ability to apply load to the bit.

        Basically there are four types of rotary drill bits: drag bits, roller cone bits, diamond bits and PDC bits (diamond bits and PDC core bits’ information is on other section).

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