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    • 47. 发明授权
    • Roller bit with a journal pin offset from the central axis thereof
    • 滚子钻头,其轴颈销偏离其中心轴线
    • US07299887B2
    • 2007-11-27
    • US10512399
    • 2003-03-26
    • Xuezhong LiuYan Zhao
    • Xuezhong LiuYan Zhao
    • E21B10/08E21B10/14
    • E21B10/083
    • This invention relates to a single cone bit with offset axis and composite cones for oil and gas drilling, mining and other subterranean drilling operations. The bit consists of a head body and a cone. The cone section has a shape of composite cones. The outer circumference of the cone is composed of from back face of the cone to top of the cone an extended gage surface, an outer cone surface and a main cone surface. A plurality of cutting elements is mounted onto each cone surface. A head journal at lower end of the head body is for rotatablely connection with the cone. Between the axis of head journal and the axis of the bit, there is an offset value d along rotating direction of the cone. A gage pad is arranged on head body at a location opposite to the offset direction of the head journal. The gage pad is fitted with inserts or hardfaced with wear resistant alloy to prevent bit from whirling and prevent head body from being worn out and to ensure gage protection. Junk slots are machined along the side of head body and jet ports are arranged at lower bevel of the head body to guarantee cuttings removal and effective cleaning results. This invention improves the bit's ability to break rocks through impact for specific use in hard formations. The bit performance is obviously improved and overall drilling cost reduced.
    • 本发明涉及一种具有偏心轴的单锥形钻头和用于油气钻井,采矿和其他地下钻井作业的复合锥体。 该钻头由头体和锥体组成。 锥形部分具有复合锥体的形状。 锥体的外圆周由圆锥体的后表面到锥体的顶部,延伸的计量表面,外圆锥表面和主锥体表面组成。 多个切割元件安装在每个锥体表面上。 头部主体下端的头颈部用于与锥体可旋转连接。 在磁头轴颈轴与钻头的轴线之间,沿锥体的旋转方向存在偏移值d。 在头部主体的与头颈部的偏移方向相反的位置处布置有量具垫。 量具垫配有插入件或耐磨合金表面,以防止钻头旋转,并防止头体磨损,并确保量具保护。 垃圾槽沿头部主体加工,喷嘴端口布置在头部主体的下斜面处,以确保切屑清除和有效的清洁效果。 本发明提高了钻头通过冲击破碎岩石的能力,用于硬地层中的特定用途。 钻头性能明显提高,整体钻井成本降低。
    • 48. 发明申请
    • Glass Sheet Heating Surface
    • 玻璃板加热面
    • US20070169513A1
    • 2007-07-26
    • US11569670
    • 2004-06-03
    • Yan Zhao
    • Yan Zhao
    • C03B5/24G12B1/00
    • C03B29/025
    • The invention discloses a glass sheet heating furnace. The furnace includes a stack, a control device and a glass sheet transfer device. The inside of the stack is divided into several heating zones. A heat accumulating type flame radiation tube is disposed in each heating zone. Diesel or natural gas or city gas or LPG is the fuel of the heat accumulating type flame radiation tube. The main fuel supplying pipes, the main wind supplying pipes and the main soot discharging pipes are disposed at the outside of the stack. A two-position four-way valve is installed in each of the heat accumulating type flame radiation tube. Two main burners of the each heat accumulating type flame radiation tube work alternately to on-off the valve. The control device controls the operation of the heat accumulating type flame radiation tube and the two-position four-way valve.
    • 本发明公开了一种玻璃板加热炉。 该炉包括一堆,一控制装置和一玻璃片传送装置。 堆的内部分为几个加热区。 在每个加热区域中设置蓄热型火焰辐射管。 柴油或天然气或城市燃气或LPG是蓄热型火焰辐射管的燃料。 主燃料供给管,主风供应管和主烟灰排放管设置在堆的外部。 在每个蓄热式火焰辐射管中安装一个两位四通阀。 每个蓄热型火焰辐射管的两个主燃烧器交替地开启阀门。 控制装置控制蓄热型火焰辐射管和二位四通阀的操作。