公开(公告)号：US20090231045A1

公开(公告)日：2009-09-17

申请号：US12475903

申请日：2009-06-01

申请人： Chih-Ming LIAO ,  Chia-Chang Chen ,  Min-Yi Chen

发明人： Chih-Ming LIAO ,  Chia-Chang Chen ,  Min-Yi Chen

IPC分类号： H03L7/099

CPC分类号： H03L7/085 ,  H03L7/0991 ,  H03L7/181 ,  H04L7/0004 ,  H04L7/033 ,  H04L7/046

摘要： A frequency-locking device including a digitally-controlled oscillator (DCO) and a comparing unit is disclosed. The DCO is used for generating an output frequency signal. The comparing unit receives a Keep Alive signal or a start of a frame (SOF) from a universal serial bus (USB) and the output frequency signal, and compares the Keep Alive signal or the start of a frame (SOF) with the output frequency signal to generate a calibration signal. Then, the DCO adjusts the frequency of the output frequency signal according to the calibration signal to meet the USB specification for data communication.

摘要翻译： 公开了一种包括数字控制振荡器（DCO）和比较单元的频率锁定装置。 DCO用于产生输出频率信号。 比较单元从通用串行总线（USB）和输出频率信号接收保持激活信号或帧起始（SOF），并将保持激活信号或帧起始（SOF）与输出频率进行比较 信号产生校准信号。 然后，DCO根据校准信号调整输出频率信号的频率，以符合USB规范进行数据通信。

公开(公告)号：US07466136B2

公开(公告)日：2008-12-16

申请号：US11222689

申请日：2005-09-09

申请人： Min-Yi Chen ,  Brian Clark ,  Anthony Collins ,  Jeffrey Tarvin

发明人： Min-Yi Chen ,  Brian Clark ,  Anthony Collins ,  Jeffrey Tarvin

IPC分类号： G01V3/20 ,  G01V3/00 ,  G01V3/18

CPC分类号： G01V3/265 ,  E21B47/10

摘要： Logging-while-drilling apparatus and methodologies for measuring streaming potential in an earth formation are provided. The apparatus and methodologies can be utilized to find information relevant to the drilling operations. In particular, since the streaming potential measurement relates directly to fluid flow, the streaming potential measurements can be used to track flow of fluids in the formation. In turn, this information may be used to find information relevant to the drilling operations, such as under-balanced drilling conditions, abnormal formation pressures, open fractures, the permeability of the formation, and formation pressure.

摘要翻译： 提供了同时钻井设备和用于测量地层中的流动电位的方法。 该装置和方法可用于查找与钻井作业相关的信息。 特别地，由于流动电位测量直接与流体流动有关，流动电位测量可用于跟踪地层中流体的流动。 反过来，这些信息可用于查找与钻井作业相关的信息，例如平衡不足的钻井条件，异常地层压力，开放裂缝，地层渗透率和地层压力。

公开(公告)号：US20050279161A1

公开(公告)日：2005-12-22

申请号：US10871854

申请日：2004-06-18

申请人： Min-Yi Chen ,  Bhavani Raghuraman ,  Ian Bryant ,  Michael Supp ,  Jose Navarro

发明人： Min-Yi Chen ,  Bhavani Raghuraman ,  Ian Bryant ,  Michael Supp ,  Jose Navarro

IPC分类号： E21B47/00 ,  E21B49/00 ,  G01N15/08 ,  G01V3/26

CPC分类号： G01V3/265

摘要： Earth formations are characterized by using an array of electrodes which can measure streaming potentials in the formation, and by interpreting the data obtained by the electrodes. The electrodes are placed on a wireline tool, a LWD tool, or in a fixed manner about a completed wellbore. The measured streaming potentials are generated by drilling with an overbearing pressure, slitting the mudcake in a borehole, acid injection, or any of various other manners which causes fluid movement. The data obtained is interpreted to locate fractures, measure formation permeability, estimate formation pressure, monitor drilling fluid loss, detect abnormal pressure, etc. Particularly, a streaming potential voltage transient having a double peak profile signifies the presence of a formation fracture.

摘要翻译： 地球构造的特征在于使用可以测量地层中的流动电位的电极阵列，以及通过解释由电极获得的数据。 电极被放置在有线工具，LWD工具上，或者以固定的方式围绕完成的井眼放置。 测量的流动电位是通过以超载压力钻孔，在井眼中分切泥饼，酸注射或导致流体运动的各种其他方式中的任何一种产生的。 所获得的数据被解释为定位裂缝，测量地层渗透率，估计地层压力，监测钻井液体损失，检测异常压力等。特别地，具有双峰曲线的流动电势电压瞬变表示存在地层断裂。

公开(公告)号：US5008625A

公开(公告)日：1991-04-16

申请号：US430214

申请日：1989-11-01

申请人： Min-Yi Chen

发明人： Min-Yi Chen

IPC分类号： G01V3/26

CPC分类号： G01V3/265

摘要： Method and apparatus for obtaining fine detail of spontaneous potential (SP) along a bore-hole wall in the earth, in connection with exploration for petrochemical deposits. A laterally-extending array of SP-sensing electrodes is mounted on an insulating pad, each slightly below the pad surface, and the pad is moved along and against the bore-hole wall while the SP's at the electronics are sampled and sent to up-hole electrodes for processing. The processed electrode samples are used to form a two-dimensional visually-observable image of the segment of the bore-hole wall swept over by the electrodes on the pad.