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公开(公告)号：WO2022100029A1
公开(公告)日：2022-05-19
申请号：PCT/CN2021/091117
申请日：2021-04-29
申请人： 中铁四局集团建筑工程有限公司 , 中铁四局集团有限公司 , 无锡市鑫良机械设备制造有限公司
IPC分类号： E21B10/42
摘要： 一种旋挖钻机用钻头，包括钻筒(1)，所述钻筒(1)上端设有连接部(2)，下端设有削切部(3)，所述钻筒(1)包括钻筒本体(11)和开合筒皮(12)，所述钻筒本体(11)沿其侧壁纵向开设一槽口，所述槽口的开口端位于钻筒本体(11)底端面，所述开合筒皮(12)设于所述槽口处，所述开合筒皮(12)顶部通过第一铰链(4)与钻筒本体(11)转动连接；所述削切部(3)具有位置相对设置的第一连接端(31)和第二连接端(32)，所述第一连接端(31)通过第二铰链(5)与开合筒皮(12)底部转动连接。该钻头的开合筒皮与削切部构成偏心L形结构，当门型框与钩子脱离时开合筒皮受重力作用自动与钻筒本体实现分离，从而使泥渣自动掉落。
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公开(公告)号：WO2021158218A1
公开(公告)日：2021-08-12
申请号：PCT/US2020/016839
申请日：2020-02-05
发明人： DOSTER, Michael L.
摘要： A downhole tool comprising a bit body and a plurality of blades. Each blade having at least one cutting element disposed within the blade. Each cutting element comprising a substrate and a poly crystalline diamond material affixed to the substrate at an interface. The poly crystalline diamond material comprising a raised cutting surface comprising at least two cutting edges, a recess in a center of the raised cutting surface, and transition surfaces between the at least two cutting edges of the raised cutting surface and a side surface of the cutting element. The disclosure also includes a method of manufacturing a downhole tool comprising: forming a drill bit, blades, and cutting elements. Forming the cutting elements comprises forming a raised cutting surface comprising at least two cutting edges, forming a recess in a center of the raised cutting surface and forming transition surfaces between the raised cutting surface and a side surface of the cutting element.
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公开(公告)号：WO2021126898A1
公开(公告)日：2021-06-24
申请号：PCT/US2020/065196
申请日：2020-12-16
摘要： Provided herein is PDC drill bits for engaging subterranean formations and for drilling wellbores, wherein the PDC drill bits are adapted to reduce erosion of the drill bit face by the inclusion of openings in a portion of the gauge of the PDC drill bit. The present disclosure also relates to systems and methods of drilling subterranean formations using the drill bits disclosed herein.
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公开(公告)号：WO2021047095A1
公开(公告)日：2021-03-18
申请号：PCT/CN2019/126152
申请日：2019-12-18
申请人： 江西基业科技有限公司
摘要： 一种连续成桩的施工方法，包括：a.将钻机的护筒组件（12）置于桩孔的位置；b.下沉钻机的钻杆组件（14）下穿护筒（13）进行钻孔，当钻杆组件（14）上的切削组件向下伸出护筒（13）后被展开，且随着钻杆组件（14）的转动对桩孔的孔壁进行转动切削，实现扩孔；c.跟随钻杆组件（14）及切削部件（2）下沉护筒（13），以实现对桩孔进行护壁；d.当护筒（13）下沉至预定位置且钻杆组件（14）钻至设计深度后，将钻杆组件（14）上提预定高度，并将护筒（13）保留在桩孔中；e.通过钻杆组件（14）向桩孔中压注混凝土；f.在钻杆组件（14）上安装上取土装置（120），并下沉钻杆组件（14），将混凝土顶部的土体或土浆取至取土装置（120）中；g.上提钻杆组件（14）及取土装置（120）至桩孔外部；h.上提护筒组件（12）出桩孔。该施工方法可以大大提高连续成桩的施工效率。
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公开(公告)号：WO2021034769A1
公开(公告)日：2021-02-25
申请号：PCT/US2020/046685
申请日：2020-08-17
摘要： A rotary drill bitb (200A) for use with a horizontal directional drill string. A coupler (206) at a proximal axial end is configured to attach the rotary drill bit to a drill head at a distal end of the drill string. A cutting portion at a distal axial end is provided with a plurality of vanes (204) with respective cutters that operate to cut a hole in earth when the rotary drill bit is rotated about a central axis. The plurality of vanes project radially outwardly from a surface of the cutting portion such that the surface forms respective troughs (214) circumferentially interspersed with the plurality of vanes. A plurality of engagement features (212a) is positioned axially within the cutting portion and radially inward of an outer cutting diameter to facilitate attachment of a product pullback device (1000) between the plurality of vanes without removing the rotary drill bit, or any portion thereof, from the drill head.
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公开(公告)号：WO2021021796A1
公开(公告)日：2021-02-04
申请号：PCT/US2020/043853
申请日：2020-07-28
摘要： A drill bit includes multiple cutting devices and a microelectronics unit. Each cutting device of the multiple cutting devices includes a cutting layer formed to cut a rock formation and a capacitive sensor disposed adjacent the cutting layer. The capacitive sensor is configured to generate an electric field across the cutting layer and to transmit a signal corresponding to a voltage associated with the electric field. The microelectronics unit of the drill bit is configured to receive the signal from the capacitive sensor of each cutting device of the multiple cutting devices such that the microelectronics unit receives multiple signals and to determine an indicator of mechanical wear of the drill bit based on a change in the voltage associated with the electric field across the cutting layer of each cutting device of the multiple cutting devices using the multiple signals.
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公开(公告)号：WO2020180330A1
公开(公告)日：2020-09-10
申请号：PCT/US2019/021199
申请日：2019-03-07
发明人： MAOUCHE, Zakaria , CHEN, Shilin
IPC分类号： E21B10/42 , E21B10/567
摘要： A device includes a drill bit body defining an axis of rotation, a plurality of drill blades on the drill bit body, and a shaped cutter secured to at least one of the plurality of drill blades. The shaped cutter including an engagement surface having an exposed partially flattened boundary, wherein a contact point of the engagement surface during drilling is off-centered with respect to a center of the exposed partially flattened boundary.
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公开(公告)号：WO2020086064A1
公开(公告)日：2020-04-30
申请号：PCT/US2018/057123
申请日：2018-10-23
摘要： A drill bit for a drilling system. The drill bit may include blades and a first depth of cut sensor. The blades may each comprise cutters. The first depth of cut sensor may be coupled to one of the blades and positioned to measure a distance between the first depth of cut sensor and a downhole surface of the borehole and transmit the distance measurement to a control system of the drilling system.
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公开(公告)号：WO2019220197A1
公开(公告)日：2019-11-21
申请号：PCT/IB2018/057416
申请日：2018-09-25
发明人： SEHSAH, Ossama R. , PLATT, James I.
摘要： Drill bit configured to operate within a wellbore of a hydrocarbon- bearing rock formations the drill bit including at least one leg (102), at least one roller cone (103) rotatably mounted on the drill bit body. The roller cone includes a plurality of cutting elements (104) for abrading or crushing rock. The drill bit includes at least one bearing (108) mounted between a surface of the drill bit body and the at least one roller cone (103) to facilitate rotation of the at least one roller cone. The drill bit system includes a lubrication system to reduce friction between moving parts of the drill bit. The drill bit system includes at least one wear sensor (22) associated with the drill bit to sense physical wear on the drill bit.
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100.发明申请
公开(公告)号：WO2019094912A1
公开(公告)日：2019-05-16
申请号：PCT/US2018/060694
申请日：2018-11-13
摘要： A cutting element assembly includes a sleeve having a cutter-receiving aperture extending through the sleeve, a cutting element, and a rotation restriction element. The cutting element may include a first plurality of retention elements extending substantially radially from an outer surface of the cutting element and engaging the sleeve to retain the cutting element within the sleeve. The rotation restriction element may be coupled to the cutting element and may include a second plurality of retention elements extending axially from a bottom surface of the rotation restriction element and engaging the sleeve to restrict rotation of the cutting element within the sleeve.
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