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    • 7. 发明授权
    • In-situ drilling system with dust collection and overload control
    • 具有集尘和过载控制的原位钻井系统
    • US06216800B1
    • 2001-04-17
    • US09198327
    • 1998-11-24
    • Henry E. WilsonGregory E. HinshawWilliam S. McIntyre, Jr.
    • Henry E. WilsonGregory E. HinshawWilliam S. McIntyre, Jr.
    • E21B306
    • G05B19/4062B23Q11/0046B23Q11/005B23Q11/04B23Q15/013B23Q17/00E21B21/065E21B21/07E21B21/08E21B44/02G05B2219/42289
    • An apparatus and method is provided for substantially continuously drilling and disposing of drill cuttings and dust to minimize airborne contamination while providing protection against overload. A drill stem with a bit is advanced by a drill head to form the drill hole. A flushing mechanism utilizes vacuum or pressurized water for flushing the cuttings and dust from the drill hole for disposal. A transducer monitors the negative or positive gauge pressure. A controller is utilized to regulate the rate of drilling dependent on the signal level of the pressure being monitored. In the preferred embodiment utilizing air, the passage in the drill stem removes the cuttings/dust and is connected to a transfer duct, which in turn is connected to a filter and the intake side of a blower. The controller is programmable to establish the optimum rate of feed of the drill head. The rotary motion of the drill bit can also be regulated by the controller. Preferably, the threshold level to determine an approaching overload is in the range of 10% to 20% over the normal gauge pressure of 0.5-4 inches Hg. The feed of the drill stem and/or the rotation is slowed or stopped in an approaching overload condition, and automatically reestablished once the condition is past. In the alternative embodiment, the pressurized water flows through the passage in the drill stem and bit forming a slurry with the cuttings/dust. The slurry flows around the drill stem/bit and is deposited outside the drill hole.
    • 提供了一种设备和方法,用于基本上连续地钻取和处理钻屑和灰尘,以最小化空气污染,同时提供防止过载的保护。 具有钻头的钻杆由钻头前进以形成钻孔。 冲洗机构使用真空或加压水从钻孔中冲洗切屑和灰尘进行处理。 传感器监测负压或正压表压。 利用控制器来调节取决于被监测压力的信号水平的钻井速率。 在利用空气的优选实施例中,钻杆中的通道去除切屑/灰尘,并且连接到输送管道,输送管道又连接到过滤器和鼓风机的进气侧。 控制器可编程,以确定钻头的最佳进给速率。 钻头的旋转运动也可以由控制器调节。 优选地,用于确定接近过载的阈值水平在0.5-4英寸Hg的常规表压下在10%至20%的范围内。 钻杆的进给和/或旋转在接近的过载状态下变慢或停止,一旦条件过去,自动重新建立。 在替代实施例中,加压水流过钻杆中的通道,并形成具有切屑/灰尘的浆料。 浆料围绕钻杆/钻头流动并沉积在钻孔的外部。