    | An SDVL system consists of a measuring device and signal analysis software system. The measuring device is a hoop installed at the top section of drillstring. It consists of a 3-D vibro-acoustic sensor, a formation information filter, and a data acquisition unit with a remote terminal node (RTN), which are powered by a 3v battery. The 3-D sensor detects the down-hole vibrations along the drill-string, and hi-frequency low-energy vibro-acoustic signals are hi-fi amplified passing through the formation information filter. The data acquisition unit works at sampling rate of 22k Hz, catching up with a set of 1024-length and 12-bit resolution data, and the RTN transmits the data to the central monitoring system (CMS) connecting to a remote computer by RS232/USB interface port. A signal analysis software system processes and interprets these vibration data. In addition, an SDVL's depth calibration is based on winch count and hook load measurement. A wireless winch count sensor and a wireless hook load sensor supplied by 3V batteries are hired for the depth calibration in the SDVL technology. |
Our innovative surface drillstring vibro-acoustic logging (SDVL) technology and equipments bring a fresh approach to safety, cost and easy operation within surface logging while drilling industry, we've taken the lead with provision of equipment that will improve reliability, safety and efficiency.
Equipment features include:
Advanced SDVL-II measurement tools
Real-time surface logging while drilling analysis system
Full data acquisition including rockies boundary and reservior identification of downhole at top of drillstring
Wireless digital network measurement system
Enhanced wireless sensors for depth (winch count sensor) and hook load (pressure sensor)
