Sound shift circuit and fault analysis
Or pulse shaping circuit, differential circuit failure, rather than make the shift pulses through. The problem is more common ground (cable jacket) contact is not good. 2, acoustic instruments jump gear shift is not eight block,
mbt chaussures paris, block leakage phenomenon. The most common cause of this phenomenon is the shift pulse width is not enough, due to jitter caused by false triggering can be considered a small capacitor in parallel with 4C2 or change the original value of the shift capacitance signal pulse width increases. Shift pulse width is not enough, and the instrument can also be taken to resolve the delay, (for the short delay component CD4098, CD4538 as long delay, delay time r = l-I1,, V · 50 foreign Logging 2002 RC). Improper shift operation, press the shift key when asked too long. One can even change the number of block. Some acoustic instruments using a single steady-state plastic CD4538, the trigger for rising edge triggering, and is re-triggered, that is to go down a single pulse width trigger signal, as long as less than cD4538 required trigger pulse width can be repeated trigger, sometimes showing gear jump phenomenon. The component has two trigger modes, can be re-triggered and non-######ual nature of re-triggering, the RX / CX-side generally not grounded, to prevent the gear jump. SCB a 501 sonic uses cD4098 monostable shaping circuit has been improved, such problems less. 3, sonic logging automatically shift the scene, if the cable 4 #, 6 # lower cable core insulation, acoustic instruments often lead to automatic shift. Because cable 4 #, 6 # cable core is the acoustic instruments used 180V AC power supply channels, the insulation decreases, the power of the formation of a loop. At this point, there have been at the end of the shift introduced into the interference signal, causing the instrument automatically shift. Between the local surface instrumentation of the lead can also cause interference string instruments were automatically shift to the appropriate step to prevent interference signal 4C3 trigger shift. Sonic the exchange itself or 3D1 interfere with the shift pulse counter input side has DC-bit (was high), will automatically shift caused sonic check whether the connection is broken and the pre-counter itself is working properly to identify sources of interference signal power transformer is usually partial short circuit, causing the coil center tap both sides of the asymmetry, resulting AC signal, causing interference and shaping monostable circuit failure more likely. Conclusion sound shift circuit these problems, often affecting the smooth-site logging, in-depth understanding of the principles of sound shift circuit to seriously analyze the work process, the handling of the part of the problem would be handy. Site operator operations shift action should be appropriate depending on the signal gain is too small to select the appropriate gear, can effectively suppress the aftermath of such interference, but also more dense in the measurement is displayed when the first wave formation rate, easy logging observation. Sometimes, high gear self-excitation occurs when the signal phenomenon, this phenomenon is the main place level produced by the instrument,
abercrombie paris, in case this happens, should be appropriately reduced the frequency of logging gear and fired. In addition, the cable insulation should meet the logging requirements (≥ 2Mn). Other acoustic instruments gain shift, and other logging tools can also refer to shifting problems to solve. References [1] wave drag device manual, Xinxiang twenty-two. 200t years [2] digital circuit technology base, Yan Shi, Higher Education Press. t997 years (on the next page 47) may be ignored. Permanent monitoring of the costs and benefits must be combined with economic considerations, some of the world's success stories, such as the examples cited in this paper will raise awareness of the use of permanent downhole pressure gauge confidence. With the permanent pressure gauges and other emerging confidence in the reliability of the system, as in many cases, from the data collected by the system will exceed the value of its short-term costs. Today, people are in remote areas and water depths up to 10,000 feet [3048 meters] of water to explore, and is drilling without interference or less affected by interference in the undersea oil wells. _I8j This clock to optimize the production environment need to match the device with the completion of a permanent monitoring system. And permanent and under the same pressure gauge and flow control valves. Permanent downhole flow meters and other equipment,
abercrombie pas cher, the reliability of the still high cost areas with harsh environmental seal selection and use of this equipment,
abercrombie paris, the main criteria. Successfully developed a precision instrument, successfully carried out in accordance with the appropriate test of reliability engineering, and successfully carry out on-site service and reliable quality control is to develop a permanent monitoring system standard. It reflects the _ 'of human resources and long-term investment. Operate according to these steps will improve the quality of future permanent monitoring system. For operators, it means that early diagnosis can be an accident, measures to reduce oil production, reduce risk and improve extraction from the reservoir. A GMc (information taken from the chatter in Burton)
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