header_interior-pages banner_interior-pages-mobile

DOWNHOLE

DDS-250

DDS-250 – Downhole Shuttle

PRODUCT DETAILS

The DDS-250 is a four-channel, digital downhole shuttle, specializing in multi-level, real-time, continuous, high-definition seismic acquisition.

FEATURES

  • 24-bit x four-channel digitizer in each shuttle
  • Ultra low-noise digitizer enables recording of low-amplitude microseismic events
  • Slim hole shuttle 2.50 inch OD – less than 63 mm
  • 3C or 4C Sensor Packages available
  • 3C tri-axis orthogonal geophone
  • 4C tri-axis orthogonal geophone and hydrophone
  • Dual-element OMNI 2400 high-output geophone sensors
  • Deepender 5000 hydrophone model for four-component recording
  • Solid-machined titanium shuttle body minimizes mechanical resonance
  • High-resolution and high-frequency recording
  • Selectable open-close motor control for each shuttle
  • Special power boost operation control
  • Direct connection sub arrays, armored wireline
  • Flexible or rigid interconnects may be connected back-to-back to form longer intervals
  • Maximum distance between DDS-250 devices is 50 meters
  • Maximum temperature rating 150°C
  • Maximum pressure rating 20,000 psi
  • Up to 32 four-component levels per well deployment
DS-250@2x

MECHANICAL SPECIFICATIONS

Outside Diameter 63 mm (2.50 in.)
Length 157 cm (62 in.)
Tool Weight 18 kg (40 lbs.)
Anchoring System Electromechanical in each Shuttle
Anchoring-to-Weight Ratio 10:1 @ 45o angle
Anchoring Motor Power 24 VDC per Shuttle constant 0.5 Amp
Time-to-Anchor ~30 seconds per shuttle @ 6″
Tool Anchoring Range 102–305 mm (4-12 inch)
Points of Contact 3 points, plus Anchor Arm
First Mechanical Tool Resonance > 650 Hz
Sensor Package 3C with dual-element OMNI-2400
Interconnect Options Rigid Tubing (stainless steel) 3m, 6m, 9m Flexible Armored Wireline
Cable 9m, 12m, 15m, 20m
Maximum Temperature Rating 150oC
Maximum Pressure Rating 20,000 psi

DDS-250 4-ch x 24-bit DIGITIZER SPECIFICATIONS

Sampling Rates ¼, ½, 1, 2, and 4 ms
Pre-Amplifier Gains 0 dB 8 dB 19 dB 31 dB
Equivalent Noise @ 2 ms 1.590 μvolts rms 0.674 μvolts rms 0.264 μvolts rms 0.176 μvolts rms
Maximum Input Signal 1.590 vrms 0.635 vrms 0.187 vrms 0.045 vrms
Gain Accuracy < 1%
Frequency Response 3 to 1.6 KHz
Anti-Alias Filter 80% Nyquist
Instantaneous Dynamic Range 120 dB
Cross-Feed Isolation > 100 dB
THD 0.0018%
System Timing Accuracy Better than 1 PPM

Information Request

    © 2020 Geospace Technologies
    Design & development by versacreative.com