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1. 发明公开

EP0733776A3 Rotary drag bit with pdc gauge bearing pads 失效
标题翻译：旋挖铣刀用聚晶金刚石刀片口径
公开(公告)号：EP0733776A3
公开(公告)日：1997-12-10
申请号：EP96301961.7
申请日：1996-03-21
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Matthias, Terry R. , Hayward, John , Lamb, Haydn Richard
IPC分类号： E21B10/56 , E21B17/10
CPC分类号： E21B10/567 , E21B17/1092
摘要： In a rotary drag-type drill bit, or other downhole component used in subsurface drilling, bearing pads (16) which engage the surface of the earthen formation of the borehole carry wear-resistant bearing inserts (20) received in sockets in the bearing pad. Each bearing insert includes a preform element (21) of the kind normally used as cutting elements in drag-type drill bits, and having a front facing table (23) of polycrystalline diamond bonded to a less hard substrate (24). The preform element is orientated so that its front diamond surface is tangential to the surface of the bearing pad, or at a slight angle thereto, so as to provide a highly wear-resistant, but non-aggressive bearing insert. The preform element may be bonded to or partly embedded in a carrier (22) which is received within the socket. The element or carrier may be formed with spaced longitudinal ribs (23) to allow it to be force-fitted into the socket, or the element or carrier may be secured within a hollow sleeve which is formed with such ribs.

2. 发明授权

EP0733776B1 Rotary drag bit with pdc gauge bearing pads 失效
标题翻译：旋挖铣刀用聚晶金刚石刀片口径
公开(公告)号：EP0733776B1
公开(公告)日：2003-09-10
申请号：EP96301961.7
申请日：1996-03-21
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Matthias, Terry R. , Hayward, John , Lamb, Haydn Richard
IPC分类号： E21B17/10 , E21B10/56
CPC分类号： E21B10/567 , E21B17/1092

3. 发明公开

EP0733776A2 Rotary drag bit with pdc gauge bearing pads 失效
标题翻译： Drehbohr-FräsmeisselmitKalibereinsätzenaus polykristallinem Diamant
公开(公告)号：EP0733776A2
公开(公告)日：1996-09-25
申请号：EP96301961.7
申请日：1996-03-21
申请人： CAMCO DRILLING GROUP LIMITED
发明人： Matthias, Terry R. , Hayward, John , Lamb, Haydn Richard
IPC分类号： E21B10/56 , E21B17/10
CPC分类号： E21B10/567 , E21B17/1092
摘要： In a rotary drag-type drill bit, or other downhole component used in subsurface drilling, bearing pads (16) which engage the surface of the earthen formation of the borehole carry wear-resistant bearing inserts (20) received in sockets in the bearing pad. Each bearing insert includes a preform element (21) of the kind normally used as cutting elements in drag-type drill bits, and having a front facing table (23) of polycrystalline diamond bonded to a less hard substrate (24). The preform element is orientated so that its front diamond surface is tangential to the surface of the bearing pad, or at a slight angle thereto, so as to provide a highly wear-resistant, but non-aggressive bearing insert. The preform element may be bonded to or partly embedded in a carrier (22) which is received within the socket. The element or carrier may be formed with spaced longitudinal ribs (23) to allow it to be force-fitted into the socket, or the element or carrier may be secured within a hollow sleeve which is formed with such ribs.
摘要翻译：在用于地下钻孔的旋转拖曳式钻头或其他井下部件中，与钻孔的土层的表面接合的轴承瓦块（16）承载容纳在轴承瓦块中的插座中的耐磨轴承插入件（20）。每个轴承插入件包括通常用作拖式钻头中的切割元件的预型件元件（21），并且具有结合到较不硬的基底（24）上的多晶金刚石的前表面（23）。取向为预成型件，使得其前金刚石表面与轴瓦的表面相切，或者与其成微小的角度，从而提供高耐磨但非侵蚀性的轴承插入件。预成型件元件可以结合或部分地嵌入在容纳在插座内的托架（22）中。元件或载体可以形成有间隔开的纵向肋（23），以允许其被力配合到插座中，或者元件或载体可以固定在形成有这种肋的中空套管内。

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