公开(公告)号：US08360175B2

公开(公告)日：2013-01-29

申请号：US12789132

申请日：2010-05-27

申请人： Xiaobing Fan ,  Peng Wu ,  Dongfang Chen ,  Chengfu Guo

发明人： Xiaobing Fan ,  Peng Wu ,  Dongfang Chen ,  Chengfu Guo

IPC分类号： E21B10/16

CPC分类号： E21B10/52 ,  E21B10/16 ,  E21B10/58

摘要： This invention relates to carbide inserts used on roller cone bits for oil and gas drilling applications as well as for other geological drilling applications, and more specifically, relates to the convex crested insert with deflected wedge surfaces. The insert comprises a cylindrical portion and a crest portion. Said crest portion is composed of a conical crest base, a top surface and two opposing wedge surfaces. Upper ends of the two wedge surfaces are merged smoothly with top surface of the insert. The specific feature of the structure is that top surface of the crest portion is convexed outwardly and forms a smooth curve surface which is higher in the middle and lowers down gradually to each end. Said two wedge surfaces are slant wedge surfaces, so that a width of the top surface and therefore a width of the insert crest are tapered from one end to the other. Advantages of this invention include: 1. Help for rock breaking and therefore, it can increase drilling efficiency of the cutters and lower the overall drilling cost; 2. higher anti-breakage capability and longer working life; and 3. when inserts of this invention are used as heel row cutting elements on bit, contact area between wider end of the top surface of the insert and borehole wall is larger and therefore the gouging action applied on the borehole wall is higher and can also achieve better gage protection of the bit.

摘要翻译： 本发明涉及在用于油气钻井应用的辊锥钻头上以及其他地质钻井应用中使用的碳化物刀片，更具体地说，涉及具有偏转的楔形表面的凸形凸起刀片。 插入件包括圆柱形部分和波峰部分。 所述顶部由锥形顶部基座，顶部表面和两个相对的楔形表面组成。 两个楔形表面的上端与插入件的顶面平滑地合并。 该结构的具体特点是，顶部的顶面向外凸出，形成平滑的曲面，中间较高，逐渐向下延伸。 所述两个楔形表面是倾斜的楔形表面，使得顶部表面的宽度以及因此的插入物峰的宽度从一端逐渐变细。 本发明的优点包括：1.帮助破岩，从而提高切割机的钻井效率，降低整体钻井成本; 更高的抗断裂能力和更长的使用寿命; 当本发明的插入件用作钻头上的脚跟切割元件时，插入件顶表面的较宽端部与钻孔壁之间的接触面积较大，因此施加在钻孔壁上的气刨动作较高，并且还可以 实现更好的量规保护。

公开(公告)号：US20100300766A1

公开(公告)日：2010-12-02

申请号：US12789132

申请日：2010-05-27

申请人： Xiaobing Fan ,  Peng Wu ,  Dongfang Chen ,  Chengfu Guo

发明人： Xiaobing Fan ,  Peng Wu ,  Dongfang Chen ,  Chengfu Guo

IPC分类号： E21B10/52 ,  E21B10/46 ,  E21B10/58 ,  E21B10/16

CPC分类号： E21B10/52 ,  E21B10/16 ,  E21B10/58

摘要： This invention relates to carbide inserts used on roller cone bits for oil and gas drilling applications as well as for other geological drilling applications, and more specifically, relates to the convex crested insert with deflected wedge surfaces. The insert comprises a cylindrical portion and a crest portion. Said crest portion is composed of a conical crest base, a top surface and two opposing wedge surfaces. Upper ends of the two wedge surfaces are merged smoothly with top surface of the insert. The specific feature of the structure is that top surface of the crest portion is convexed outwardly and forms a smooth curve surface which is higher in the middle and lowers down gradually to each end. Said two wedge surfaces are slant wedge surfaces, so that a width of the top surface and therefore a width of the insert crest are tapered from one end to the other. Advantages of this invention include: 1. Help for rock breaking and therefore, it can increase drilling efficiency of the cutters and lower the overall drilling cost; 2. higher anti-breakage capability and longer working life; and 3. when inserts of this invention are used as heel row cutting elements on bit, contact area between wider end of the top surface of the insert and borehole wall is larger and therefore the gouging action applied on the borehole wall is higher and can also achieve better gage protection of the bit.

摘要翻译： 本发明涉及在用于油气钻井应用的辊锥钻头上以及其他地质钻井应用中使用的碳化物刀片，更具体地说，涉及具有偏转的楔形表面的凸形凸起刀片。 插入件包括圆柱形部分和波峰部分。 所述顶部由锥形顶部基座，顶部表面和两个相对的楔形表面组成。 两个楔形表面的上端与插入件的顶面平滑地合并。 该结构的具体特点是，顶部的顶面向外凸出，形成平滑的曲面，中间较高，逐渐向下延伸。 所述两个楔形表面是倾斜的楔形表面，使得顶部表面的宽度以及因此的插入物峰的宽度从一端逐渐变细。 本发明的优点包括：1.帮助破岩，从而提高切割机的钻井效率，降低整体钻井成本; 更高的抗断裂能力和更长的使用寿命; 当本发明的插入件用作钻头上的脚跟切割元件时，插入件顶表面的较宽端部与钻孔壁之间的接触面积较大，因此施加在钻孔壁上的气刨动作较高，并且还可以 实现更好的量规保护。