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公开(公告)号：US11085240B2
公开(公告)日：2021-08-10
申请号：US16470491
申请日：2018-11-09
发明人： Hossam Gharib , Steven Graham Bell
摘要： A radial bearing apparatus including a housing with a housing bore defining a radial bearing housing surface, a shaft extending through the housing bore and defining a radial bearing shaft surface, and a radial bearing contact interface between the radial bearing housing surface and the radial bearing shaft surface for bearing a variable side force applied to the shaft. The radial bearing contact interface includes an oblique section in which the radial bearing housing surface and the radial bearing shaft surface are oblique to each other when the side force is zero and progressively increase in contact in an axial direction in response to an increasing magnitude of the side force.
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公开(公告)号：US20190203536A1
公开(公告)日：2019-07-04
申请号：US15777377
申请日：2015-12-30
摘要： Various embodiments disclosed relate to bearing assembly for drilling a subterranean formation and methods of using the same. In various embodiments, the present invention provides a method of drilling a subterranean formation. The method includes flowing a drilling fluid through a drill string disposed in the subterranean formation, with the drill string including a bottom hole assembly including a bearing assembly including a low flow bearing. The method includes flowing a first part of the drilling fluid into contact with the low flow bearing, while simultaneously flowing a second part of the drilling fluid through a bypass channel around the low flow bearing. The method also includes discharging the first and second part of the drilling fluid between the bottom hole assembly and the subterranean formation.
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公开(公告)号：US20170343046A1
公开(公告)日：2017-11-30
申请号：US15529240
申请日：2015-01-28
CPC分类号： F16D1/0829 , E21B17/03 , E21B17/04 , E21B17/043 , E21B17/076 , E21B17/16 , F16D1/0864 , F16D1/116 , Y10T403/62
摘要： An interference apparatus is provided for a motor shaft transmission assembly. The interference apparatus may include split-ring shells and a retaining device. The interference apparatus may be mounted to an intermediate sleeve of the motor shaft transmission assembly. The interference apparatus is configured to prevent the loss of certain motor shaft transmission assembly components downhole in the event of a failure of the motor transmission due to dynamic loads.
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公开(公告)号：US20220389774A1
公开(公告)日：2022-12-08
申请号：US17393212
申请日：2021-08-03
IPC分类号： E21B17/10
摘要： A drill string for drilling a borehole. The drill string may include a downhole motor operable to rotate the drill string and a centralizer assembly. The centralizer assembly may include an outer housing, a lower sub threadably engaged with the outer housing, and a centralizer. The centralizer may include a single eccentric blade, an internal shoulder positioned between the outer housing and the lower sub, and an alignment profile to align the centralizer in an azimuthal position relative to the drill string. The centralizer may be retainable in the aligned azimuthal position by the alignment profile and the internal shoulder being engaged by the outer housing and the lower sub.
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公开(公告)号：US20200181979A1
公开(公告)日：2020-06-11
申请号：US16470491
申请日：2018-11-09
发明人： Hossam Gharib , Steven Graham Bell
摘要： A radial bearing apparatus including a housing with a housing bore defining a radial bearing housing surface, a shaft extending through the housing bore and defining a radial bearing shaft surface, and a radial bearing contact interface between the radial bearing housing surface and the radial bearing shaft surface for bearing a variable side force applied to the shaft. The radial bearing contact interface includes an oblique section in which the radial bearing housing surface and the radial bearing shaft surface are oblique to each other when the side force is zero and progressively increase in contact in an axial direction in response to an increasing magnitude of the side force.
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公开(公告)号：US10538967B2
公开(公告)日：2020-01-21
申请号：US15777377
申请日：2015-12-30
IPC分类号： E21B4/00
摘要： Various embodiments disclosed relate to bearing assembly for drilling a subterranean formation and methods of using the same. In various embodiments, the present invention provides a method of drilling a subterranean formation. The method includes flowing a drilling fluid through a drill string disposed in the subterranean formation, with the drill string including a bottom hole assembly including a bearing assembly including a low flow bearing. The method includes flowing a first part of the drilling fluid into contact with the low flow bearing, while simultaneously flowing a second part of the drilling fluid through a bypass channel around the low flow bearing. The method also includes discharging the first and second part of the drilling fluid between the bottom hole assembly and the subterranean formation.
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公开(公告)号：US10301876B2
公开(公告)日：2019-05-28
申请号：US15526293
申请日：2014-12-12
摘要： A downhole drilling motor, system, and method for using same are disclosed. A downhole drilling motor can include a power section stator having a first end, a second end, an internal cavity passing therethrough. The downhole drilling motor can further include a rotor assembly positioned and fully encased in the internal cavity. The rotor assembly includes a power section rotor, a drivetrain operably coupled to the power section rotor and a bearing set. The power section rotor is positioned at the first end within the internal cavity of the power section stator. The power section rotor, the drivetrain, and the bearing set are fully encased in the internal cavity of the power section stator. Additional apparatuses, systems, and methods are disclosed.
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公开(公告)号：US20190154081A1
公开(公告)日：2019-05-23
申请号：US16314360
申请日：2017-08-18
发明人： Krutibas Panda , Philip Park-Hung Leung , Tyler Jeffrey Romanyk , Andrew McPherson Downie , Steven Graham Bell
摘要： Downhole tools such as bearing assemblies and stabilizers are described for withstanding abrasive and erosive wear in operation. These stabilizers and bearing assemblies employ wear-resistant hard materials such as TSP, PCD, leached WC, and SCD composite materials. A bond between a braze material and wear tiles constructed of a hard phase material may include a non-planar interface with the braze material. Self-lubricating materials may be provided within the braze material or the hard material in some instances.
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公开(公告)号：US20180066480A1
公开(公告)日：2018-03-08
申请号：US15560392
申请日：2015-04-23
IPC分类号： E21B17/10
CPC分类号： E21B17/1078 , E21B4/02 , E21B17/04
摘要： A stabilizer device is provided for a mud motor drilling assembly. The stabilizer device may be mounted to a motor housing having one or more grooves or ridges. The stabilizer device may include a stabilizer body, a threaded portion, and a clamp. The threaded portion may be positioned between the one or more grooves or ridges and the clamp. The threaded portion may include an external surface having threads. The threads on the external surface of the threaded portion of the stabilizer device may correspond to threads on an internal surface of a clamp. The threaded coupling of the clamp to the stabilizer device may couple the stabilizer device to the motor housing at the one or more grooves or ridges.
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公开(公告)号：US10760339B2
公开(公告)日：2020-09-01
申请号：US15528159
申请日：2014-12-19
IPC分类号： E21B4/02 , F03C2/22 , E21B21/08 , F01C1/22 , F04C2/107 , F01C1/10 , F04C13/00 , E21B4/00 , E21B21/00
摘要： A mud motor, system, and method for using same are disclosed. A mud motor can include a continuously formed power section stator housing having a first end, a second end, and an internal cavity comprising a series of stator lobes and a housing portion passing. The stator lobes can extend from the first end of the power section stator housing until a first end of a transition portion. The transition portion can form a unitary combination with the stator lobes. The mud motor further includes a rotor assembly including a power section rotor having rotor lobes to be disposed completely within the internal cavity. Additional apparatuses, systems, and methods are disclosed.
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