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    • 2. 发明授权
    • Method and apparatus for controlling the effect of contact impedance on a galvanic tool in a logging-while-drilling application
    • 用于控制钻井应用中的接触阻抗对电动工具的影响的方法和装置
    • US06373254B1
    • 2002-04-16
    • US09320367
    • 1999-05-25
    • Dominique DionMark T. FreyJames Stephen HallQiming LiRichard A. RosthalMark A. Fredette
    • Dominique DionMark T. FreyJames Stephen HallQiming LiRichard A. RosthalMark A. Fredette
    • G01V320
    • G01V3/20
    • The present invention describes a method and apparatus to control the effect of contact impedance on a formation resistivity measurement during a logging-while-drilling operation. The control of contact impedance is accomplished by maintaining a substantially zero difference in potential between two monitor electrodes positioned on the resistivity logging tool near a current electrode. The tool can employ a ring electrode configuration and/or a button electrode, configuration. The ring electrode configuration incorporates two pairs of ring monitor electrodes on each side of a ring current electrode. The button electrode configuration incorporates. a monitor electrode, surrounded by a current electrode, surrounded by a second monitor electrode. Insulation gaps are positioned between each electrode to separate the electrodes. A variable current is supplied to the current electrode in each configuration to maintain the same potential at each monitor electrode. The effect of contact impedance is controlled through maintaining the same potential at each monitor electrode.
    • 本发明描述了一种在钻井操作期间控制接触阻抗对地层电阻率测量的影响的方法和装置。 接触阻抗的控制通过在位于当前电极附近的电阻率测井工具上的两个监视电极之间保持基本上零电位差来实现。 该工具可以采用环形电极配置和/或按钮电极的配置。 环形电极结构在环形电流电极的每一侧都包含两对环形监测电极。 按钮电极配置结合。 由电流电极包围的监视电极,被第二监视电极包围。 绝缘间隙位于每个电极之间以分离电极。 在每个配置中,向当前电极提供可变电流以在每个监视器电极处保持相同的电位。 通过在每个监测电极处保持相同的电位来控制接触阻抗的影响。
    • 3. 发明授权
    • Apparatus and method for retrieving and/or communicating with downhole
equipment
    • 用于检索和/或与井下设备通信的装置和方法
    • US5278550A
    • 1994-01-11
    • US820724
    • 1992-01-14
    • Erik Rhein-KnudsenMark A. Fredette
    • Erik Rhein-KnudsenMark A. Fredette
    • E21B23/03E21B31/18E21B47/01G01V1/00
    • E21B23/03E21B31/18E21B47/01
    • Method and apparatus for fishing for and/or communicating with subsurface apparatus. In a preferred embodiment, a subsurface logging-while-drilling (LWD) or measuring-while-drilling (MWD) apparatus is placed in tandem with a drill string near the bottom of a borehole. The LWD apparatus includes a surface retrievable component such as a nuclear source carrier with a fishing head facing upwardly. The carrier is releasably secured within the LWD apparatus with means such as a shear pin. A wireline conveyed tool having a downwardly facing latching mechanism includes a downhole powered latch for telescopically extending beyond the fishing head, forcing a latching lug radially inwardly below the fishing head, and moving axially upward to latch the fishing head. Further upward latch movement causes the fishing head to move upwardly until the shear pin shears which releases the carrier from the subsurface apparatus. The wireline tool with the attached carrier is then brought to surface with the wireline cable. In a preferred embodiment, the subsurface apparatus includes a secondary coil within its tubular housing. A primary coil is provided on the wireline tool such that upon the wireline tool landing within the subsurface apparatus, the primary coil is nested within the secondary coil. As a result, a bi-directional communication link is established from surface instrumentation to the subsurface apparatus via the wireline cable and the nested coils.
    • 用于钓鱼和/或与地下装置通信的方法和装置。 在一个优选实施例中,地下同步钻井(LWD)或钻探测量(MWD)装置与钻孔底部附近的钻柱串联放置。 LWD装置包括表面可回收部件,例如具有向上的钓鱼头的核源载体。 载体可释放地固定在LWD装置内,具有诸如剪切销的装置。 具有向下的闩锁机构的有线传送工具包括用于可伸缩地延伸超过钓鱼头的井下动力闩锁,迫使钓鱼头下方的径向向内的闩锁突起并且轴向向上移动以锁定钓鱼头。 进一步的向上的闩锁运动导致钓鱼头向上移动,直到剪切销剪切,从而从地下装置释放托架。 然后将带有附接载体的电缆工具与电缆电缆一起带到表面。 在优选实施例中,地下装置在其管状壳体内包括次级线圈。 初级线圈设置在有线工具上,使得在地下设备内的有线工具着陆时,初级线圈嵌套在次级线圈内。 因此,通过有线电缆和嵌套线圈,从表面仪器到地下设备建立双向通信链路。
    • 7. 发明授权
    • Highly integrated logging tool
    • 高度集成的测井工具
    • US07436185B2
    • 2008-10-14
    • US11160490
    • 2005-06-27
    • Mark A. FredetteMartin E. Poitzsch
    • Mark A. FredetteMartin E. Poitzsch
    • G01V3/00G01V5/12G01V5/10G01V1/40
    • G01V11/005G01V3/24
    • An apparatus for logging a formation traversed by a borehole includes a plurality of logging tools adapted for conveyance inside the borehole. The plurality of logging tools includes a tool body, a sensing pad responsive to a density property of the formation coupled to the tool body, a current emitting measure electrode responsive to a lateral resistivity property of the formation incorporated on the sensing pad, a mechanism for urging the sensing pad in contact with a side of the borehole coupled to the tool body, and a pair of mass isolation bands disposed about the tool body to isolate a mass of the tool body adjacent the measure electrode.
    • 用于记录由钻孔穿过的地层的装置包括适于在钻孔内传送的多个测井工具。 所述多个测井工具包括工具主体,响应于耦合到工具主体的地层的密度特性的感测板,响应于结合在感测板上的地层的横向电阻特性的电流发射测量电极,用于 推动感测垫与耦合到工具主体的钻孔的一侧接触;以及一对质量隔离带,其设置在工具主体周围,以隔离与测量电极相邻的工具体的质量。
    • 9. 发明授权
    • Method of removing excess overlay coating from within cooling holes of
aluminide coated gas turbine engine components
    • 从涂覆铝化物的燃气涡轮发动机部件的冷却孔内去除多余的覆盖层的方法
    • US5702288A
    • 1997-12-30
    • US521199
    • 1995-08-30
    • William R. LiebkeDavid R. DawsonMark A. FredetteMark B. Goodstein
    • William R. LiebkeDavid R. DawsonMark A. FredetteMark B. Goodstein
    • B24B31/00B24B31/116F01D5/18B24B1/00
    • B24B31/116B23P2700/06
    • A method of removing excess MCrAlY overlay coating from within a cooling hole of an aluminide coated gas turbine engine component is disclosed. The method includes providing a gas turbine engine component having an internal surface (4), an outer surface (6) and a root end (8). The component also includes at least one cooling hole (10) extending from the internal surface (4) to the outer surface (6), wherein the internal surface(4) of the component is coated with a corrosion resistant aluminide coating. An MCrAlY overlay coating (12) is also located on the outer surface (6) and inside a portion of the cooling hole (10). An abrasive slurry is forced into the gas turbine engine component from the outside of the component to the inside of the component, through the cooling hole (10), such that the slurry flows through the internal surface (4) of the component and removes at least a portion of the overlay coating (12) located inside the cooling hole (10) without adversely affecting the internal surface (4) of the component. The abrasive slurry subsequently exits the component through the root end (8).
    • 公开了一种从铝化物涂覆的燃气涡轮发动机部件的冷却孔内去除多余的MCrAlY覆层涂层的方法。 该方法包括提供具有内表面(4),外表面(6)和根端(8)的燃气涡轮发动机部件。 该部件还包括从内表面(4)延伸到外表面(6)的至少一个冷却孔(10),其中部件的内表面(4)涂覆有耐蚀铝化物涂层。 MCrAlY覆盖层(12)也位于外表面(6)上并且位于冷却孔(10)的一部分内。 磨料浆料通过冷却孔(10)从组件的外部被迫进入燃气涡轮发动机部件中,使得浆料流过部件的内表面(4)并且在 所述覆盖层(12)的至少一部分位于所述冷却孔(10)的内部,而不会不利地影响所述部件的内表面(4)。 研磨浆料随后通过根端(8)离开组件。