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公开(公告)号：US12098599B2
公开(公告)日：2024-09-24
申请号：US17767726
申请日：2020-10-09
发明人： John Hammargren
CPC分类号： E21B17/1078 , E21B1/00
摘要： A drilling assembly for percussive drilling includes at least two of a drill bit, a drill rod and a guide adapter. A peripheral surface of the shoulder on the drill rod is at least partially encased in both radial and axial directions inside the mounting sleeve of the drill bit or the mounting sleeve of the guide adapter, and/or the peripheral surface of the shoulder on the guide adapter is at least partially encased in both radial and axial directions inside the mounting sleeve of the drill bit.
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2.发明公开公开(公告)号：US20240295012A1
公开(公告)日：2024-09-05
申请号：US18578454
申请日：2022-07-08
IPC分类号： C22C29/08 , B22F3/15 , B22F3/24 , B22F5/00 , B22F9/02 , B22F9/04 , C22C1/051 , C22C29/06 , E21B10/56
CPC分类号： C22C29/08 , B22F3/15 , B22F3/24 , B22F5/00 , B22F9/026 , B22F9/04 , C22C1/051 , C22C29/067 , E21B10/56 , B22F2005/001 , B22F2009/043 , B22F2301/15 , B22F2302/10 , B22F2998/10 , B22F2999/00
摘要： A sintered cemented carbide insert for mining or cutting applications includes a mean WC grain size of between 0.8-18 μm, a binder phase in a weight between 4-18 wt %, a gamma phase with the cubic gamma phase precursors in a weight of between 0.8-10 wt %, and any unavoidable impurities and a balance of WC. A difference between the hardness at any point 0.3 mm from the surface of the insert and the hardness of the bulk is at least 25 HV3, wherein hardness is measured according to ISO EN6507. A method of producing the cemented carbide is also provided.
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公开(公告)号：US20240133246A1
公开(公告)日：2024-04-25
申请号：US18278772
申请日：2022-02-25
发明人： Tomas JANSSON , Anders NORDBERG
IPC分类号： E21B17/042
CPC分类号： E21B17/0426
摘要： A coupling for connecting downhole tubulars includes a tubular body, a female coupling part, a male coupling part, and at least one of: a male screw thread formed on an outer surface of the body, and a female screw thread formed in an inner surface of the body. The at least one thread having a thread-form including a crest, a root, and a pair of flanks. The crest and the root are each cambered about a respective first and second camber radius, Rb, Rb−T along the entire length of the thread-form, and each camber radius, Rb, Rb−T, is greater than an outer diameter of the coupling. The male screw thread has a camber radius, Rbm, and the female screw thread has a camber radius, Rbf, wherein each camber radius (Rb, Rb−T) is between 700-1900 mm.
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公开(公告)号：US11898213B2
公开(公告)日：2024-02-13
申请号：US17785482
申请日：2020-12-18
摘要： A method of treating a sintered mining insert including cemented carbide includes the step of subjecting the mining insert to a surface hardening process. The surface hardening process is executed at an elevated temperature of or above 100° C. A mining insert is also provided, wherein the HV1 Vickers hardness measurement increase (HV1%) from the surface region, measured as an average of HV1 measurements taken at 100 μm, 200 μm and 300 μm below the surface, compared to the HV1 Vickers hardness measured in the bulk (HV1bulk), is at least 8.05-0.00350×HV1bulk.
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公开(公告)号：US20230272678A1
公开(公告)日：2023-08-31
申请号：US18013215
申请日：2021-06-29
发明人： John HAMMARGREN
IPC分类号： E21B17/042
CPC分类号： E21B17/0426
摘要： A female portion is arranged to form part of a thread joint for a percussive drilling tool including a mounting sleeve having an axial end, wherein the mounting sleeve surrounds an internal cavity having an axial inner wall at the opposing end of the mounting sleeve compared to the axial end. The mounting sleeve has at least one substantially cylindrical internally threaded section having a length L1, a thread entrance positioned towards the axial end and a thread exit positioned towards the axial inner wall. A thread clearance section is positioned between the axial inner wall and the thread exit and has a length L2 and a diameter D1. A guiding section is positioned between the thread entrance and the axial end of the sleeve and has a length, L3, wherein 0 mm
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公开(公告)号：US20210238927A1
公开(公告)日：2021-08-05
申请号：US17271143
申请日：2019-08-15
发明人： John HAMMARGREN , David WICKSTROM
摘要： A percussive drill bit includes a head and an axially rearward skirt. A plurality of ribs project radially outward at the skirt and define lengthwise extending channels. The ribs and channels, in the lengthwise direction are curved or angled to deviate from a longitudinal axis of the drill bit to facilitate rearward transport of fines and flushing fluid.
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公开(公告)号：US20210172318A1
公开(公告)日：2021-06-10
申请号：US17270116
申请日：2019-08-20
申请人： SANDVIK MINING AND CONSTRUCTION AUSTRALIA (PRODUCTION/SUPPLY) PTY LTD , SANDVIK MINING AND CONSTRUCTION TOOLS AB
IPC分类号： E21D21/00
摘要： A rock bolt arranged for installation within a bore formed in rock strata includes an elongate shaft with the leading end for installation into the bore and a trailing end projecting from an open end of the bore. A locking nut is threadably attached to the trailing end and is arranged to display product information and the like at a display face. The display face is recessed axially into the nut to provide protection against damage to the display face that may otherwise render the information unreadable.
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公开(公告)号：US20240247550A1
公开(公告)日：2024-07-25
申请号：US18562518
申请日：2022-05-20
发明人： Raul ROLDAN SALDES
摘要： A rotary cone rock bit having a forward end and a rearward end, includes a bit body having a plurality of legs extending therefrom. Each of the legs have an outer surface that includes a leading surface, a center panel surface, and a trailing surface and at least one nozzle. A roller cone is rotatably supported on each of the legs. The rotary cone bit further includes at least identification tag for storing product identification information and/or drilling operation information. The at least one identification tag is positioned on the trailing surface of at least one of the legs.
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公开(公告)号：US12044077B2
公开(公告)日：2024-07-23
申请号：US17909909
申请日：2021-03-10
发明人： Tomas Jansson , Andreas Norman , Anders Nordberg
IPC分类号： E21B17/042
CPC分类号： E21B17/042
摘要： A drill string including an elongate hollow main length section and a male spigot portion provided at the second end and having an externally threaded section and a non-threaded shank positioned axially intermediate the main length section and the threaded section. The shank includes a transition section positioned adjacent the main length section or a radially projecting shoulder at the second end. The transition section has an outside diameter that increases in a direction from the male spigot portion to the main length section or the shoulder. The cross-sectional shape profile of the outer surface of the transition section in the plane of the longitudinal axis has a segment of an ellipse having semi-major axis (a) and a semi-minor axis (b), wherein the ratio of the semi-major to semi-minor axes (a:b) is within the range 2b
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公开(公告)号：US20240229567A9
公开(公告)日：2024-07-11
申请号：US18278772
申请日：2022-02-25
发明人： Tomas JANSSON , Anders NORDBERG
IPC分类号： E21B17/042
CPC分类号： E21B17/0426
摘要： A coupling for connecting downhole tubulars includes a tubular body, a female coupling part, a male coupling part, and at least one of: a male screw thread formed on an outer surface of the body, and a female screw thread formed in an inner surface of the body. The at least one thread having a thread-form including a crest, a root, and a pair of flanks. The crest and the root are each cambered about a respective first and second camber radius, Rb, Rb−T along the entire length of the thread-form, and each camber radius, Rb, Rb−T, is greater than an outer diameter of the coupling. The male screw thread has a camber radius, Rbm, and the female screw thread has a camber radius, Rbf, wherein each camber radius (Rb, Rb−T) is between 700-1900 mm.
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