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公开(公告)号：WO2021142188A1
公开(公告)日：2021-07-15
申请号：PCT/US2021/012591
申请日：2021-01-08
申请人： SCHLUMBERGER TECHNOLOGY CORPORATION , SCHLUMBERGER CANADA LIMITED , SERVICES PETROLIERS SCHLUMBERGER , SCHLUMBERGER TECHNOLOGY B.V.
发明人： MAHAJAN, Manoj , BELNAP, John Daniel , GAN, Xiaoge , FANG, Yi , PENG, Cheng , BELNAP, Lynn , ZHANG, Youhe , AZAR, Michael George , KARUPPIAH, Venkatesh , LEBARON, Anthony , YAO, Xian
IPC分类号： E21B10/567 , E21B10/26 , E21B10/42 , E21B10/5673
摘要： A cutting element has a cutting face at an opposite axial end from a base, a side surface extending from the base to the cutting face, an edge formed at the intersection between the cutting face and the side surface, and an elongated protrusion formed at the cutting face and extending between opposite sides of the edge, wherein the elongated protrusion has a geometry including a border extending around a concave surface and sloped surfaces extending between the border and the edge, and wherein the concave surface has a major axis dimension measured between opposite sides of the border and a minor axis dimension measured perpendicularly to the major axis dimension and ranging from 50 percent to 99 percent of the major axis dimension.
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公开(公告)号：WO2021090148A1
公开(公告)日：2021-05-14
申请号：PCT/IB2020/060280
申请日：2020-11-03
申请人： FLEXIDRILL LIMITED
摘要： Disclosed is a drill bit for coupling in use to an RC drilling apparatus, the drill bit comprising: an annular drill bit that is rotatable to cut a formation bore face, a concentric drill bit, wherein: the annular drill bit comprises a body and an annular cutting element with a continuous bit face configured such that in use, when the bit face seats on the bore face, drilling fluid that flows through the annular drill bit is retarded from leaking from the annular drill bit through the bit face/bore face interface.
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公开(公告)号：WO2021080728A1
公开(公告)日：2021-04-29
申请号：PCT/US2020/052540
申请日：2020-09-24
IPC分类号： E21B10/567 , E21B10/42 , E21B10/26
摘要： A cutter element for a drill bit includes a base portion having a central axis, a first end, and a second end. In addition, the cutter element includes a cutting layer fixably mounted to the first end of the base portion. The cutting layer includes a cutting face distal the base portion. The cutting face includes a first planar surface and a second planar surface that is circumferentially-spaced from the first planar surface. Each planar surface is positioned at an outer periphery of the cutting face adjacent the radially outer surface of the cutting layer. The cutting face also includes a saddle surface including a crown and a pair of lateral side surfaces that slope down and away from the crown toward the radially outer cylindrical surface of the cutting layer. The crown extends from the first planar surface to the second planar surface.
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公开(公告)号：WO2021048648A1
公开(公告)日：2021-03-18
申请号：PCT/IB2020/056922
申请日：2020-07-22
摘要： A bit for drilling a wellbore includes: a shank having a coupling formed at an upper end thereof; a body removably attached to a lower end of the shank and having a blade receptacle formed therethrough; a blade fixed to the body; a plurality of superhard cutters mounted along a leading edge of the fixed blade; a blade disposed in the blade receptacle and longitudinally movable relative to the body between an extended position and a retracted position; a plurality of superhard cutters mounted along a leading edge of the movable blade; and a spring disposed between the shank and the movable blade and biasing the movable blade toward the extended position.
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公开(公告)号：WO2020235407A1
公开(公告)日：2020-11-26
申请号：PCT/JP2020/019046
申请日：2020-05-13
申请人： 金属工具株式会社
摘要： 掘削効率を向上させたオーガーヘッドに装着されるオーガービットを提供する。 本発明は、オーガーヘッドに装着されるオーガービット１１であって、オーガーヘッドの軸方向に先端が突出した基部１２と、基部に連続して延出した所定の間隔をあけて対向する２つの脚部１３，１４とを備え、基部は、脚部の平面と平行で連続した平面部１２ａと、平面部から前記オーガーヘッドの軸方向、先端側に向けて傾斜した第１傾斜部１２ｂ乃至１２ｄと、第１傾斜部から連続した側面部１２ｅ，１２ｆと、第１傾斜部から前記オーガーヘッドの軸方向、脚部側に向けて傾斜した第２傾斜部１２ｇとからなり、平面部及び脚部は、オーガーヘッドの軸方向に対して所定の曲率で湾曲した形状である。
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公开(公告)号：WO2020070546A1
公开(公告)日：2020-04-09
申请号：PCT/IB2018/058835
申请日：2018-11-09
摘要： An example drill bit (1) includes a body (10) that is connectable to a drill string (2). The body (10) has a base (7) configured to face downhole within a wellbore (5) and a perimeter (6) configured to face a wall (8) of the wellbore (5). The body (10) includes a first nozzle (14) and a second nozzle (14). The first nozzle corresponds to a first channel (12) that exits the body (10) through the perimeter (6) and the second nozzle (14) corresponds to a second channel (13) that exits the body through the base (7). The example drill bit (1) also includes a bit cutter (11) on the base (7) of the body (10) and a valve (16) within the body (10). The valve (16) is configured to move within the body to block either the first channel (12) or the second channel (13).
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公开(公告)号：WO2020005292A1
公开(公告)日：2020-01-02
申请号：PCT/US2018/040434
申请日：2018-06-29
摘要： A rotary drill bit includes movable gauge elements biased to protrude radially through a circumferential engagement surface of a gauge pad. The gauge elements are retractable to protrude a lesser distance against the bias of a biasing mechanism. Fluid chambers are defined adjacent the gauge elements, and fluid is permitted to be bled into and out of the fluid chambers to delay and slow the retraction and extension of the gauge elements. During straight drilling operations, the biasing mechanisms maintain the gauge elements in an extended position providing stability to the drill bit. When a steering force is applied to the drill bit, the gauge elements retract slowly as fluid is bled from the fluid chambers. As the gauge elements rotate with the drill bit, the retracted configuration may be maintained as gauge elements disengage the geologic formation on a side of the drill bit opposite the steering direction.
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公开(公告)号：WO2020005286A1
公开(公告)日：2020-01-02
申请号：PCT/US2018/040379
申请日：2018-06-29
摘要： A rotary drill bit is operable for forming a wellbore in a geologic formation, and includes a hybrid gauge pad thereon. The hybrid gauge pad includes movable gauge elements biased to protrude radially from a circumferential engagement surface of the gauge pad to define a full gauge of the drill bit. The movable gauge elements retract and become flush with the circumferential engagement surface of the gauge pad in response to the application of a steering force to the drill bit, and thus, the circumferential engagement surface of the gauge pad may define the full gauge of the drill bit in a second configuration. The gauge elements are axially spaced from one another and are arranged to provide either uniform engagement forces, or decreasing engagement forces in an axial direction of the drill bit.
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9.发明申请
公开(公告)号：WO2019099520A1
公开(公告)日：2019-05-23
申请号：PCT/US2018/061055
申请日：2018-11-14
发明人： WEBB, Steven, W.
摘要： A method of forming an impregnated cutting structure for an earth-boring tool comprises providing a powder mixture comprising diamond particles and a metal binder in a press and subjecting the powder mixture to a pressure greater than about 4.0 GPa and a temperature greater than about 1,200°C to density the powder mixture and form an impregnated cutting structure comprising the diamond particles dispersed in a continuous phase comprising the metal binder, wherein the impregnated cutting structure is substantially free of diamond-to-diamond bonds and of carbides. Related methods of forming an earth- boring tool and a related earth-boring tool including the impregnated cutting structure are also disclosed.
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公开(公告)号：WO2019099317A1
公开(公告)日：2019-05-23
申请号：PCT/US2018/060252
申请日：2018-11-12
摘要： Earth-boring tools include a body, at least one first blade extending outward from the body, and at least one second blade extending outward from the body. The at least one first blade includes an upper surface, a first gage region having a first longitudinal length, and a recess extending at least partially into the at least one first blade from the upper surface. The at least one second blade includes a second gage region having a second, greater longitudinal length. Additional earth-boring tools include first blades having first gage regions of a first longitudinal length and second blades having second gage regions of a second, greater longitudinal length. An upper external surface is tapered radially outward in a longitudinally upward direction relative to a central axis of the earth-boring tool. Methods including forming such first and second blades and removing material from the first blades to form recesses.
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