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    • 2. 发明申请
    • Wide Bandwidth Borehole Dipole Source
    • 宽带宽钻孔偶极子源
    • US20150143888A1
    • 2015-05-28
    • US14406502
    • 2012-06-11
    • Chung ChangHaoshi SongWei Zhang
    • Chung ChangHaoshi SongWei Zhang
    • G01V1/52E21B47/14G01V1/04
    • G01V1/52E21B47/14G01V1/04G01V1/053G01V1/147G01V1/155G01V1/40G01V1/44G01V2210/121G01V2210/1299G01V2210/1429Y10S181/401
    • A dipole source for borehole acoustic logging is provided, including a cylindrical shell, a center beam coupled to the cylindrical shell and a movable projector inside the cylindrical shell to impact the center beam. The dipole source includes a cavity acoustically insulating the interior of the cylindrical shell from the exterior of the cylindrical shell. An acoustic logging tool for making measurements of a substrate surrounding a borehole with a body insertable in the borehole is also provided. The body includes an acoustic detector and a dipole source as above, along the axial length. The acoustic logging tool may include a control unit to process data collected from the acoustic detector and obtain information about the substrate surrounding the borehole. According to embodiments disclosed herein, a method for operating a dipole source and an acoustic logging tool as above is provided.
    • 提供了一种用于井眼声学测井的偶极源,包括圆柱形壳体,耦合到圆柱形壳体的中心梁和圆柱形壳体内的可移动投影仪以撞击中心梁。 偶极源包括将圆柱形壳体的内部与圆柱形壳体的外部隔离的腔体。 还提供了一种声学测井工具,用于利用可插入钻孔中的主体来测量钻孔周围的基底。 身体沿轴向长度包括如上所述的声检测器和偶极源。 声学测井工具可以包括控制单元,用于处理从声学检测器收集的数据,并获得有关围绕钻孔的基底的信息。 根据本文公开的实施例,提供了如上所述的用于操作偶极源和声学测井工具的方法。
    • 3. 发明申请
    • AXIS MAINTENANCE APPARATUS, SYSTEMS, AND METHODS
    • 轴维护装置,系统和方法
    • US20150167402A1
    • 2015-06-18
    • US14414609
    • 2012-07-26
    • Chung Chang
    • Chung Chang
    • E21B17/10E21B47/09
    • E21B17/1057E21B17/1014E21B19/16E21B47/09
    • In some embodiments, an apparatus and a system, as well as a method and an article, may operate to select a longitudinal axis (250) within a borehole (220), and to move a down hole housing using at least one set of rollers (82) attached to the housing to contact a surface of the borehole (220), so that simultaneous movement with two rotational degrees of freedom is enabled within the borehole (220). The centerline of the housing can be substantially aligned with a selected longitudinal axis (250) while the housing moves along the selected longitudinal axis. Additional apparatus, systems, and methods are disclosed.
    • 在一些实施例中,设备和系统以及方法和物品可以操作以选择井眼(220)内的纵向轴线(250),并且使用至少一组辊子移动井下壳体 (82),其附接到所述壳体以接触所述钻孔(220)的表面,使得能够在所述钻孔(220)内同时进行具有两个旋转自由度的运动。 壳体的中心线可以基本上与选定的纵向轴线(250)对准,同时壳体沿着所选择的纵向轴线移动。 公开了附加装置,系统和方法。
    • 4. 发明申请
    • ROTATIONAL DRIVESHAFT COUPLER TO FACILITATE A PERFECT SEAL
    • 旋转驱动器联轴器,以提供完美的密封
    • US20130068049A1
    • 2013-03-21
    • US13235378
    • 2011-09-17
    • Chung Chang
    • Chung Chang
    • F16H21/48
    • F16D3/33F16D3/84F16J15/50Y10T74/18408
    • A rotational driveshaft coupler that converts a rotating shaft motion into two orthogonal oscillations and at the opposite side of this coupler, a third oscillator converts the oscillations back to a rotational motion. At least one slip free seal can be constructed from the coupler to its housing to separate the space occupied by the output shaft from the space occupied by the input shaft. Each of the three oscillating motions can be guided by bearings, gears and tracks to reduce frictions and heat generation. Permanent magnet pairs are used to prevent bifurcation and force the output shaft to follow the rotation direction of the input shaft. Unlike in magnetic coupling, the torque transmission here is direct.
    • 旋转驱动轴联接器,其将旋转轴运动转换为两个正交振荡,并且在该耦合器的相对侧,第三振荡器将振荡器转换回到旋转运动。 至少一个无滑动的密封件可以从联轴器到其外壳构造,以将由输出轴占据的空间与输入轴占据的空间分开。 三个摆动运动中的每一个都可以由轴承,齿轮和轨道引导,以减少摩擦和发热。 永磁体对用于防止分叉,并迫使输出轴跟随输入轴的旋转方向。 与磁耦合不同,这里的扭矩传递是直接的。
    • 5. 发明申请
    • TWO WAY CHECK SHOT AND REVERSE VSP WHILE DRILLING
    • 两种方式检查钻孔和反向VSP钻孔
    • US20100101861A1
    • 2010-04-29
    • US12256860
    • 2008-10-23
    • Chung Chang
    • Chung Chang
    • E21B47/12
    • G01V1/42
    • Methods and related systems are described making seismic measurements. Seismic energy is transmitted into the earth using a surface seismic source. The seismic energy is received with one or more downhole receivers located in a borehole. In response to the received seismic energy from the surface seismic source, seismic energy is transmitted into the earth using a downhole seismic source. The seismic energy from the downhole seismic source is then received with one or more surface receivers located on the surface of the earth. A delay interval is measured downhole between the first arrival of the seismic energy from the surface seismic source and the transmission from the downhole seismic source. A surface interval is measured between the transmitting of seismic energy from the surface seismic source and first arrival of the seismic energy from the downhole seismic source using the one or more surface receivers. Travel time can be calculated by subtracting the delay interval from the surface interval.
    • 描述了进行地震测量的方法和相关系统。 地震能量使用地震震源传播到地球上。 地震能量被位于钻孔中的一个或多个井下接收器接收。 响应于从地震震源获得的地震能量,地震能量使用井下地震源传输到地球中。 然后,来自井下地震源的地震能量被位于地球表面上的一个或多个地面接收器接收。 在来自地表震源的地震能量的首次到达与来自井下地震源的传输之间,井下测量延迟间隔。 在使用一个或多个表面接收器之间,从表面地震源发射地震能量和来自井下地震源的地震能量的首次到达之间测量表面间隔。 可以通过从表面间隔中减去延迟间隔来计算行程时间。
    • 6. 发明申请
    • DOWNHOLE SEISMIC SOURCE
    • 井下地震源
    • US20080110691A1
    • 2008-05-15
    • US11559252
    • 2006-11-13
    • Chung ChangRichard Timothy CoatesJean G. Saint Germain
    • Chung ChangRichard Timothy CoatesJean G. Saint Germain
    • G01V1/147G01V1/40
    • G01V1/147
    • Elastodynamic waves are generated by a tool having a hammer rotatably connected with a housing by a first hinge and an actuator arm rotatably connected with the hammer by a second hinge. An axial force applied to the actuator arm by a drive shaft and spring is translated and amplified to a radial impact force by rotation of the hammer around the first hinge. The tool may also include a stabilizer arm connected to the actuator arm by a third hinge, and connected to the housing by a fourth hinge. The housing may be an acoustic wireline tool cylinder having an opening that permits the hammer mass to extend outside the housing when rotated in a first direction. The housing may also include a second opening that permits the hammer mass to extend outside the housing when rotated in a second direction, and a third opening that permits the hammer mass to extend outside the housing when rotated between the first and second openings.
    • 弹性动力波通过具有通过第一铰链与壳体可旋转地连接的锤的工具产生,以及通过第二铰链与锤可旋转地连接的致动器臂。 通过驱动轴和弹簧施加到致动器臂的轴向力通过围绕第一铰链的锤的旋转而被平移和放大到径向冲击力。 工具还可以包括通过第三铰链连接到致动器臂的稳定臂,并且通过第四铰链连接到壳体。 壳体可以是具有开口的声学有线工具圆筒,当沿第一方向旋转时,该开口允许锤块延伸到外壳外部。 壳体还可以包括第二开口,其允许锤块在沿第二方向旋转时延伸到壳体外部;以及第三开口,其允许锤块在第一和第二开口之间旋转时延伸到外壳外部。