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1. 发明申请

WO1997048876A1 ROLLING CONE BIT HAVING GAGE AND NESTLED GAGE CUTTER ELEMENTS HAVING ENHANCEMENTS IN MATERIALS AND GEOMETRY TO OPTIMIZE BOREHOLE CORNER CUTTING DUTY 审中-公开
标题翻译：带有金属和氮化物切割器的滚子锥头元件在材料和几何中进行优化以优化钻孔角切割负荷
公开(公告)号：WO1997048876A1
公开(公告)日：1997-12-24
申请号：PCT/US1997010622
申请日：1997-06-20
申请人： SMITH INTERNATIONAL, INC.
发明人： SMITH INTERNATIONAL, INC. , GARCIA, Gary, Edward , PORTWOOD, Gary, Ray , MINIKUS, James, Carl , NESE, Per, Ivar , CISNEROS, Dennis , CAWTHORNE, Chris, Edward , KESHAVAN, Madapusi, K.
IPC分类号： E21B10/16
CPC分类号： E21B17/1092 , E21B10/16 , E21B10/52
摘要： A rolling cone bit (10) having a gage row (80) and an adjacent nestled gage row (70) of cutter elements that are positioned on gage so as to divide or share the borehole corner cutting duty. The wear resistance, hardness, toughness and shape of the cutter elements in the adjacent rows (60, 70, 80) are optimized depending upon the type of cutting the respective rows perform, the characteristics of the formation being drilled and the drilling techniques being employed. In most applications, the nestled gage cutter elements (70) will have cutting surfaces that are more wear resistant or harder than the cutting surfaces of the gage cutter elements (80) which experience more bottom hole duty. The nestled gage cutter elements (70) engage the borehole wall with a negative rake angle for increased durability. Preferably, the nestled gage cutter elements (70) have continuously contoured and non-shearing cutting surfaces.
摘要翻译：一种具有量具行（80）和相邻的切割器元件的排列（70）的滚动锥形钻头（10），其定位在计量器上，以便分割或共享钻孔角切削功能。相邻行（60,70,80）中的切割元件的耐磨性，硬度，韧性和形状根据各行执行的切割类型，钻孔地层的特性和采用的钻井技术进行优化。在大多数应用中，配套的量具切割器元件（70）将具有比经历更多的底坑功能的量规切割器元件（80）的切割表面更耐磨或更硬的切割表面。坐骑的量规切割器元件（70）以具有负前角的钻孔壁接合以提高耐久性。优选地，所配套的量具切割器元件（70）具有连续轮廓和非剪切切割表面。

2. 发明申请

WO1997038205A1 ROLLING CONE BIT WITH ENHANCEMENTS IN CUTTER ELEMENT PLACEMENT AND MATERIALS TO OPTIMIZE BOREHOLE CORNER CUTTING DUTY 审中-公开
标题翻译：在切割器元件放置和加工中优化钻头角切割负荷的轧制锥
公开(公告)号：WO1997038205A1
公开(公告)日：1997-10-16
申请号：PCT/US1997005948
申请日：1997-04-10
申请人： SMITH INTERNATIONAL, INC.
发明人： SMITH INTERNATIONAL, INC. , PORTWOOD, Gary, Ray , GARCIA, Gary, Edward , MINIKUS, James, Carl , NESE, Per, Ivar , CISNEROS, Dennis , CAWTHORNE, Chris, Edward
IPC分类号： E21B10/16
CPC分类号： E21B10/52 , E21B10/16
摘要： A rolling cone bit (10) includes a cone cutter (14, 15, 16) having a pair of adjacent rows of cutter elements (70, 80) that are positioned so as to divide the sidewall (5) and bottom hole (7) duty. The wear resistance, hardness and toughness of the cutter elements (70, 80) in the adjacent rows are optimized depending upon the type of cutting the respective rows perform. In most applications, the cutter elements (70) experiencing the sidewall cutting will have cutting surfaces that are more resistant or harder than the cutting surfaces of the cutter elements (80) in the rows experiencing more bottom hole duty. Likewise, the cutter elements (80) exposed to the bottom hole duty will generally be tougher than those (70) experiencing substantial sidewall cutting. The material enhancements include varying the grades of tungsten carbide used in the cutter elements (70, 80) and by selectively employing layers of superhard abrasives, such as PCD or PCBN. The cutter elements (70, 80) may be either inserts or steel teeth.
摘要翻译：滚动锥形钻头（10）包括锥形切割器（14,15,16），所述锥形切割器具有一对相邻的切割元件排（70,80），所述切割器元件定位成将侧壁（5）和底孔（7）分开，义务。相邻行中的切割元件（70,80）的耐磨性，硬度和韧性根据各行的切割类型进行优化。在大多数应用中，经历侧壁切割的切割器元件（70）将具有比经历更多底坑功能的行中的切割元件（80）的切割表面更耐力或更硬的切割表面。类似地，暴露于底部孔隙的切割器元件（80）通常将比经历大量侧壁切割的那些（70）更坚硬。材料增强包括改变在刀具元件（70,80）中使用的碳化钨的等级，并且通过选择性地使用诸如PCD或PCBN的超硬磨料层。刀具元件（70,80）可以是插入件或钢齿。

3. 发明申请

WO1997038204A1 ROLLING CONE BIT WITH GAGE AND OFF-GAGE CUTTER ELEMENTS POSITIONED TO SEPARATE SIDEWALL AND BOTTOM HOLE CUTTING DUTY 审中-公开
标题翻译：滚动锥头与定位和分离切割元件位于独立的边框和底部孔切割负荷
公开(公告)号：WO1997038204A1
公开(公告)日：1997-10-16
申请号：PCT/US1997005918
申请日：1997-04-10
申请人： SMITH INTERNATIONAL, INC.
发明人： SMITH INTERNATIONAL, INC. , PORTWOOD, Gary, Ray , GARCIA, Gary, Edward , MINIKUS, James, Carl , NESE, Per, Ivar , CISNEROS, Dennis , CAWTHORNE, Chris, Edward
IPC分类号： E21B10/16
CPC分类号： E21B10/5673 , E21B10/16 , E21B10/52
摘要： A rolling cone bit (10) includes at least one roller cone cutter (14, 15, 16) having a gage row of cutter elements (60) and a first inner row of near but off-gage cutter elements (70) that are positioned so as to divide the sidewall and the buttom hole cutting duty so as to enhance bit durability, maintain borehole diameter and improve ROP. The off-gage distance (D) of the first inner row of cutting elements is defined for various bit sizes to optimize the division of cutting duty. The distance that the first inner row of cutter elements (70) are off-gage may be constant for all the cones on the bit (10) or may be varied among the various cones to balance the durability and wear characteristics on all the cones of the bit.
摘要翻译：滚动锥形钻头（10）包括至少一个具有一定数量的刀具元件（60）的滚子锥形切割器（14,15,16）和位于第二内部排列的附近但不规则切割元件（70）的第一内排以便分隔侧壁和孔洞切削功能，以提高钻头的耐用性，保持钻孔直径并提高ROP。针对不同的钻头尺寸定义了第一内切割元件排的距离（D），以优化切割功能的划分。切割器元件（70）的第一内排离开的距离对于钻头（10）上的所有锥体可以是恒定的，或者可以在各种锥体之间变化，以平衡所有锥体上的耐久性和磨损特性有点

4. 发明申请

WO1997048873A3 NON-SYMMETRICAL STRESS-RESISTANT ROTARY DRILL BIT CUTTER ELEMENT 审中-公开
公开(公告)号：WO1997048873A3
公开(公告)日：1997-12-24
申请号：PCT/US1997010772
申请日：1997-06-20
申请人： SMITH INTERNATIONAL, INC.
发明人： SMITH INTERNATIONAL, INC. , PORTWOOD, Gary, Ray , GARCIA, Gary, Edward , MINIKUS, James, Carl , NESE, Per, Ivar , CAWTHORNE, Chris, Edward , McDONOUGH, Scott, D.
IPC分类号： E21B10/08

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