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公开(公告)号：US09976357B2
公开(公告)日：2018-05-22
申请号：US14824453
申请日：2015-08-12
CPC分类号： E21B10/602 , E21B10/42 , E21B10/61 , E21B2010/607
摘要： A drill bit comprises a bit body having a body face. A plurality of fixed blades extends from the bit body. Each of the plurality of fixed blades has a leading face and a trailing face. A plurality of nozzles is disposed on the body face to flow drilling fluid out of the bit body. A plurality of flow guides direct a portion of the drilling fluid away from the bit body. Each of the plurality of flow guides extends longitudinally from the body face, and along the leading face of one of the plurality of fixed blades.
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公开(公告)号：US09951567B2
公开(公告)日：2018-04-24
申请号：US14485302
申请日：2014-09-12
申请人： Varel Europe S.A.S.
CPC分类号： E21B10/602 , E21B10/61
摘要： A curved nozzle for use in a drill bit is disclosed. The curved nozzle includes a flow path that directs drilling fluid towards the face of cutters. The curved nozzle may include a base, neck, and a tip. Flow entering the nozzle, travels along a flow path through the nozzle and out the tip. The flow path may be reduced as it passes through the nozzle. The flow is curved as it flows through the neck and out the tip. The nozzle includes cooperating interior surfaces that guide the flow. The upper interior surface may include two curved zones. The first zone will be a substantially constant radius of curvature. The second zone, extending from the first zone, may be straight.
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公开(公告)号：US20180051520A1
公开(公告)日：2018-02-22
申请号：US15784293
申请日：2017-10-16
发明人： Sonny Beauchamp
CPC分类号： E21B10/55 , E21B3/00 , E21B10/43 , E21B10/602 , E21B2010/425 , E21B2010/545
摘要： A method of forming a hole in a hard ground structure including the step of obtaining a drill-bit with a turning axis having: a central portion and first and second axially spaced ends; and a plurality of protruding blades. Each blade has first and second ends, a first end portion, a second end portion, a middle portion, and a circumferentially facing leading portion. The circumferentially facing leading portion of each blade has at least one discrete hard cutter thereat. The method further includes the step of turning the drill-bit around its axis in a first direction so that the blades are advanced, circumferentially facing leading portion first, while pulling the drill-bit axially, with the first drill-bit end in a leading direction, through the hard ground structure to thereby cause the discrete cutters to cut the hard ground structure.
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公开(公告)号：US09878957B2
公开(公告)日：2018-01-30
申请号：US15107004
申请日：2015-06-30
IPC分类号： B23K31/02 , C04B35/528 , B23K1/00 , C22C26/00 , C04B35/64 , C04B35/63 , C04B35/638 , E21B10/567 , B23K101/00 , B23K103/00 , E21B10/54 , E21B10/60
CPC分类号： C04B35/528 , B22F7/062 , B22F2005/001 , B22F2998/10 , B22F2999/00 , B23K1/0008 , B23K2101/002 , B23K2103/50 , C04B35/6303 , C04B35/638 , C04B35/64 , C04B2235/405 , C04B2235/427 , C22C26/00 , E21B10/54 , E21B10/567 , E21B10/602 , B22F2003/244 , B22F2201/00
摘要： Catalyst extraction from polycrystalline diamond table may be achieved by treating with a halogen (in the gas phase or dissolved in a nonpolar organic solvent) to convert the catalyzing material to a salt. Then, polar organic solvents may optionally be used to leach the salt from the polycrystalline diamond table. The polycrystalline diamond (with the salt of the catalyzing material present or at least partially leached therefrom) may be brazed to a hard composite substrate to produce a cutter suitable for use in a matrix drill bit.
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公开(公告)号：US09869134B2
公开(公告)日：2018-01-16
申请号：US14771594
申请日：2014-03-06
发明人： Kazuyoshi Nakamura , Hiroshi Ota
摘要： The inner bit is provided with: a supply hole which is open at the distal end portion of the inner bit; and a discharge groove which is formed in an outer peripheral surface of the inner bit and extends in the direction of the axial line. The supply hole is provided with: a distal end blow hole which is open in a distal end surface of the distal end portion of the inner bit; and an outer peripheral blow hole which is open in an outer peripheral surface of the distal end portion of the inner bit. An outer peripheral groove via which the outer peripheral blow hole communicates with the discharge groove is formed in the outer peripheral surface of the inner bit. The outer peripheral groove is covered with the ring bit from the outside in a radial direction.
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公开(公告)号：US20170362900A1
公开(公告)日：2017-12-21
申请号：US15303668
申请日：2016-03-03
申请人： LONGYEAR TM, INC.
摘要： A drill bit for cutting a hole in a formation. The drill bit has a shank and a crown. The crown has a plurality of crown portions that are spaced about an operative circumference of the drill bit. The shank and crown cooperate to define an interior space that receives water or other drilling fluid. Each crown portion has two longitudinal edges, an outer surface, at least one inner surface and a cutting face. The crown has a base surface that is spaced from the cutting faces of the crown portions and cooperates with the inner surface of each of the two crown portions to define a slot.
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公开(公告)号：US20170234076A1
公开(公告)日：2017-08-17
申请号：US15113586
申请日：2015-09-22
CPC分类号： E21B10/54 , B22C9/22 , B22D23/06 , B22D25/02 , B22F3/1055 , B22F7/00 , B22F2005/001 , B22F2207/07 , B22F2999/00 , B33Y10/00 , B33Y80/00 , C22C1/0491 , C22C1/1036 , C22C1/1094 , C22C26/00 , C22C29/00 , C22C2202/02 , C23F1/16 , E21B10/602 , Y02P10/295 , B22F3/1039
摘要： A metal matrix composite tool includes a body having hard composite portion that includes reinforcing particles dispersed in a binder material. At least some of the reinforcing particles comprise a monolithic particle structure including a core having irregular outer surface features integral with the core.
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8.发明申请公开(公告)号：US20170159369A1
公开(公告)日：2017-06-08
申请号：US14957186
申请日：2015-12-02
CPC分类号： E21B10/60 , E21B7/00 , E21B7/18 , E21B10/567 , E21B10/602 , E21B10/62 , E21B43/26
摘要： Method of operating earth-boring tools may involve activating a selectively activatable hydraulic fracturing device secured to the earth-boring tool to impact an underlying earth formation with a fluid from the selectively activatable hydraulic fracturing device. A crack may be at least one of initiated or propagated in a portion of the underlying earth formation utilizing the fluid in response to activation of the selectively activatable hydraulic fracturing device. The selectively activatable hydraulic fracturing device may be subsequently deactivated. Earth-boring tools may include a selectively activatable hydraulic fracturing configured to transition between an activated state in which fluid is permitted to flow through the selectively activatable hydraulic fracturing device to engage with an underlying earth formation and a deactivated state in which fluid does not flow through the selectively activatable hydraulic fracturing device. The selectively activatable hydraulic fracturing device may be configured to at least one of initiate or propagate cracks.
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公开(公告)号：US20170107764A1
公开(公告)日：2017-04-20
申请号：US14905072
申请日：2015-04-24
IPC分类号： E21B10/42 , B33Y80/00 , B23K15/00 , E21B10/60 , B22F3/105 , B22F1/00 , B28B1/00 , B29C67/00 , B33Y10/00 , B23K26/342
CPC分类号： E21B10/42 , B22F1/0011 , B22F3/1055 , B22F7/062 , B22F2005/001 , B22F2007/066 , B23K15/0086 , B23K26/342 , B23K2101/002 , B28B1/001 , B29C64/153 , B33Y10/00 , B33Y80/00 , E21B10/602 , Y02P10/295
摘要： A metal matrix composite (MMC) tool includes a mesoscale-reinforced hard composite portion that comprises reinforcing particles and mesoscale reinforcing structures dispersed in a binder material. The mesoscale reinforcing structures are printed using at least one additive manufacturing technique and are larger than an average powder-size distribution of the reinforcing particles.
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公开(公告)号：US20170101825A1
公开(公告)日：2017-04-13
申请号：US15032578
申请日：2015-05-07
CPC分类号： E21B10/54 , B22F7/08 , B22F2005/001 , C22C26/00 , C22C29/00 , C22C32/00 , E21B10/42 , E21B10/55 , E21B10/602
摘要： A fixed-cutter drill bit is provided that includes a metal-matrix composite body having at least one metal-matrix composite blade. Cutters are disposed on the blades. A ductile insert is partially disposed within the body and has an exposed surface. The ductile insert has a greater ductility than the metal-matrix composite thereby alleviating stresses imposed on the metal-matrix composite during manufacture of the bit or drilling.
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