VIBRATION DETECTION SERVICES

A suite of software designed to detect vibration early ensuring a smoother ride.
• Ensures longevity of the drill bit.
• Avoids twist offs, casing wear and hole
  instability.
• Optimizes drilling parameters reducing
  drilling string wear.

There are several types of downhole vibration, which can be detected at surface. ILI has developed and perfected surface detection using modern hardware and software.  Detect subtle vibrations before they lead to hole damage, drillstring failure and bit wear through high speed data acquisition of torque, weight on bit, rotary speed and standpipe pressure.

Traffic Light System to Alert Driller
A simple traffic light system alerts the driller when vibration occurs. Simply changing drilling parameters can greatly enhance bit performance and save valuable time and money.

Experts
ILI prides itself on the quality of our staff. Vibration detection comes to life with the onsite interaction of our expertly trained staff who provide real time advice on how best to drill your well.

Drill String Vibration Analysis (DLS VibrA)
The Drill Logic System Vibration Analysis package is a tool designed to aid drilling personnel in the detection and suppression of harmful drill string vibrations common during harsh drilling conditions.

The DLS VibrA system is designed to detect and quantify the severity of torsional drill string vibration and provide immediate feedback about the results of remedial actions.  The system allows the implementation of practical guidelines designed to suppress torsional vibration before it results in BHA failure.

By smoothing out downhole drilling conditions BHA components can expect to yield a longer life before failure thus bringing drilling operations closer to optimum.

VibrA Server
The VibrA DAQ Server acquires sensor data at the necessary rate to insure sufficient data quantity and quality is supplied to the VibrA Client Applications Digital Signal Processing functions.

The Vibra DAQ Server performs the following services:

• Sensor calibration
•  Modify data acquisition parameters
•  Acquire sensor data and convert to engineering units
•  Manage connections for multiple network users

Typically, sensor signals are acquired at a rate of 10Hz which is sufficient for analyzing torsional drill string vibrations (typically observed in range of .5 to 2 Hz).

The VibrA DAQ Server sends full data packets, at the frequency specified by the operator, to all currently connected VibrA clients. VibrA clients connect to the VibrA DAQ server via a local or, network bandwidth permitting, wide area network.  Windows 95 or Windows NT workstation may connect using NetBEUI or TCP/IP protocols.  The VibrA DAQ server and VibrA Client communicate using Microsoft's Distributed Component Object Model (DCOM) to ensure fast and reliable asynchronous communications.

VibrA Client
The VibrA Client software provides real-time display of rotary torque, rotary RPM, hookload, and stand pipe pressure at the frequency the VibrA DAQ server is acquiring data (usually 10 Hz).  The real-time data display allows the driller,  or other Vibra Client users on the network, to observe drill-string vibrations as they occur and the results of corrective actions.

Sophisticated digital signal processing routines perform complex Fast Fourier Transform (FFT) frequency analysis of the torque signal in real-time.  The FFT result, implemented as a Power Spectrum, detects sinusoidal variations of the torque signal and analyzes those variations for frequency and magnitude.  The displayed results, represented by the
Power Spectrum graph and RMS (root mean squared, a measure of the magnitude of the variation) gauge provide a measure for the torsional vibration.

Detailed post-drilling analysis is provided by querying the database to playback the raw data.  Since data is saved at its acquisition rate (not averaged or smoothed or otherwise altered) the signals are displayed exactly as while drilling thus the torque signals power spectrum is analyzed for the presence and magnitude of the torsional vibration.

The DLS VibrA Client software will allow historical data playback while the real-time signals are saved to a database.  In addition to the DLS VibrA palyback capabilities, selected intervals may also be plotted in a strip log format with GeoPlot.

Alarms will alert the user to adverse drilling conditions based on the standard deviations of signals, paired signal standard deviation, or high torsional vibration.

The DLS VibrA software will run on Windows 98 or Windows 2000 workstations that can establish a network connection to the DLS VibrA server.  Several DLS VibrA client workstations may connect to the VibrA server simultaneously to distribute real-time drill string vibration data at the rig site or company offices.