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公开(公告)号：EP3887638A1
公开(公告)日：2021-10-06
申请号：EP19889419.8
申请日：2019-11-26
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公开(公告)号：EP2925951B1
公开(公告)日：2018-09-26
申请号：EP13861194.2
申请日：2013-12-02
CPC分类号： E21B10/55 , E21B10/43 , E21B10/46 , E21B10/567
摘要： Earth boring tools with a plurality of fixed cutters have side rake or lateral rakes configured for improving chip removal and evacuation, drilling efficiency, and/or depth of cut management as compared with conventional arrangements.
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公开(公告)号：EP4065809A1
公开(公告)日：2022-10-05
申请号：EP20732395.7
申请日：2020-05-22
IPC分类号： E21B10/20 , E21B10/62 , E21B10/633 , E21C35/183 , E21C35/19
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公开(公告)号：EP3906354A1
公开(公告)日：2021-11-10
申请号：EP19842571.2
申请日：2019-12-30
发明人： MAW, Jason C.
IPC分类号： E21B10/61
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公开(公告)号：EP3837415A1
公开(公告)日：2021-06-23
申请号：EP19759864.2
申请日：2019-08-16
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公开(公告)号：EP3765704A1
公开(公告)日：2021-01-20
申请号：EP19714034.6
申请日：2019-03-15
发明人： CASAD, Christopher M. , CHREST, Ben , DAMIAN, Thomas A. , DEEN, Carl Aron , EVERHEART, Kristy , SISSON, Kerry
IPC分类号： E21B10/42
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公开(公告)号：EP3447232A3
公开(公告)日：2019-07-31
申请号：EP18196223.4
申请日：2013-12-02
摘要： A rotary apparatus for earth boring operations has a body with a central axis, about which the apparatus rotates and a plurality of cutters arrayed on the body in fixed positions. The plurality of cutters collectively defines at least a portion of a cutting profile for the bit when it is rotated. Each of the group of cutters has a cutting face, a predetermined radial position within the cutting profile, and a predetermined side inclination angle. The plurality of cutters comprises a first group of at least two adjacent cutters, and a second group also of at least two adjacent cutters. The side inclination angles of the cutters in the first group change consecutively from one cutter to the next adjacent cutter in a first direction; and the side inclination angles of the cutters in the second group change consecutively from one cutter to the next adjacent cutter in a second direction opposite to the first direction.
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8.发明公开DIAMOND CUTTING ELEMENTS FOR DRILL BITS SEEDED WITH HCP CRYSTALLINE MATERIAL 审中-公开具有晶体HCP材料的金刚石切割件OFFSET芯钻头
公开(公告)号：EP2847413A1
公开(公告)日：2015-03-18
申请号：EP13788488.8
申请日：2013-05-09
发明人： MURDOCK, Andrew, David , MUMMA, Matthew Douglas , CLEGG, John Martin , DUBOSE, William Henry , BOWDEN, Neal Alan
IPC分类号： E21B10/46 , E21B10/567
CPC分类号： E21B10/567 , B32B18/00 , C04B35/528 , C04B2235/3826 , C04B2235/386 , C04B2235/427 , C04B2235/5436 , C04B2235/5454 , C04B2235/75 , C04B2237/363 , C04B2237/588 , C22C26/00 , C22C2026/008
摘要： A polycrystalline diamond compact (PDC), which is attached or bonded to a substrate to form a cutter for a drill bit, is comprised of sintered polycrystalline diamond interspersed with a seed material which has a hexagonal close packed (HCP) crystalline structure. A region of the sintered polycrystalline diamond structure, near one or more of its working surfaces, which has been seeded with an HCP seed material prior to sintering, is leached to remove catalyst. Selectively seeding portions or regions of a sintered polycrystalline diamond structure permits differing leach rates to form leached regions with differing distances or depths and geometries.
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公开(公告)号：EP4288635A1
公开(公告)日：2023-12-13
申请号：EP22705280.0
申请日：2022-02-02
发明人： CASE, Spencer
IPC分类号： E21B10/43
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公开(公告)号：EP4146903A1
公开(公告)日：2023-03-15
申请号：EP21726743.4
申请日：2021-04-26
IPC分类号： E21B17/04 , E21B17/046 , E21B17/07
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