Product Description
RCQ-2D Geophysical Instrument is a fully digital, modular geophysical logging system developed by RanCheng Machinery through more than 20 years of continuous engineering upgrades. Unlike traditional systems-where one surface instrument works with only one probe-the RCQ-2D Geophysical Instrument allows a single host unit to connect a wide range of logging probes. It performs power supply, command control, and data acquisition through one 3.17 mm single-core armored cable, supporting up to 2000 m logging depth.
All downhole tools transmit A/D-converted digital signals through encoded, bidirectional communication. This design provides high resistance to noise, stable data quality, and real-time operation directly from the PC interface. With a total system weight under 120 kg, it is highly suitable for field geological surveys across mining, hydrology, coal exploration, oilfield logging, and environmental investigations.
The system can measure more than 20 formation parameters-including SP, natural gamma, resistivity (potential & gradient), acoustic velocity, amplitude, temperature, deviation, caliper, fluid conductivity, liquid level, magnetic components, susceptibility, and polarization-meeting diverse field requirements.
Technical Parameters
1. The use of the environment: Power supply: 220V, 50 Hz; Using the environment temperature: -20℃ ~ 45℃; Using the environment humidity: 90% or less (45℃)
2.The depth measurement system: Depth measurement range: 0 ~ 9999.99 m; Depth resolution: 0.28 mm; Speed measurement range: 0 ~ 9999m/h; Deep optical pulse signal: 3600 pulses per meter
3.Signal transmission system: Bottom hole output signal: bipolar coding; Communication with the computer: RS232 or USB; The underground signal detection level: plus or minus 0.5 V ~ plus or minus 12V
4. Figure out the depth of the graph; 1:10; 1:50. 1:100. 1:0; 1, 50, 0, etc.
5. The drawing accuracy: 8 points per millimeter (curve); 64 pixels per square millimeter (image method)
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12bit A/D Conversion, Program-Controlled Magnifcation K=0.5~128 |
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Counting Channel |
f ≤ 500kHz |
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Digital Signal Transmission Frequency |
9600bit/s |
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Power Supply Cycle |
400ms |
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Current |
2mA-500mA Optional |
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Signal Input Range |
≤ ± 10V |
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Continuous Working Time |
≤ 24hr |
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Power Consumption |
<200W |
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Volume |
420*260*210mm |
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Weight |
<7kg |
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Working Temperature Range |
-1°C~+50°C |
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Working Power Supply |
AC220V ± 10% 50Hz ± 5% |
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Logging Speed |
0~30m/min ARCustable(as per sampling interval) |
Key Features
Standardized & Modular System Architecture
Hardware, software, downhole probes, and ground units share a unified, modular design. All parts are fully interchangeable, field-serviceable, and easily expanded with additional functions.
01
Full Downhole Digitalization & Coded Signal Transmission
Every probe performs A/D conversion in-situ. Signals are digitally encoded and transmitted bidirectionally through the cable. The system also features built-in error correction and robust anti-interference capabilities.
02
Oversampling for High-Resolution Formation Data
RCQ-2D Geophysical Instrument automatically increases oversampling when logging speed decreases, improving digital filtering and resolving subtle formation changes with greater vertical precision.
03
Compact, High-Pressure Downhole Probes
Probes are typically Ø40–50 mm with lengths of 1–1.5 m. Stainless-steel housings withstand pressures of 20–40 MPa and temperatures of 70–90°C; optional builds support pressures of up to 60 MPa and temperatures of 120°C for extreme environments.
04
Integrated Lightweight Logging Winch
The 1500 m armored cable completes power and communication simultaneously. The winch includes automatic spooling, depth encoder, and integrated controller-yet the total system weight remains under 120 kg.
05
Advantages
The RCQ-2D Geophysical Instrument is engineered by RanCheng Machinery with long-term field work in mind. Its modular design keeps the system easy to service-parts match across all modules, upgrades are straightforward, and on-site repairs can be done quickly. Even in remote locations, the system maintains stable, continuous operation.
Because all probes digitize their signals downhole, the RCQ-2D Geophysical Instrument delivers clean, consistent curves with very little interference. This gives survey teams reliable data when evaluating formations, locating water, identifying fractures, or checking structural changes.
RanCheng's multi-probe architecture allows one host unit to handle SP, gamma, resistivity, acoustic, temperature, deviation, caliper, and many other parameters. Field crews only bring one system, reducing transport work, setup time, and equipment management.
Oversampling technology-developed and optimized through years of RanCheng field projects-brings out subtle layer details, thin beds, and small geological changes. This directly supports mineral surveys, hydrological studies, coal seams, and structural logging.
All probes are built with RanCheng's stainless-steel high-pressure designs, enabling stable performance in deep wells, high-temperature zones, or fractured formations.
Customer Benefits
- Get more Parameters with one system: SP, gamma, resistivity, acoustic, temperature, deviation, and more-no need to buy multiple tools.
- Lower operating cost: Standardized modules reduce maintenance and spare-part expenses.
- Easy to move, easy to use: Total weight under 120 kg makes field work faster and lighter.
- Reliable results: Clear digital curves support safer drilling and more accurate geological decisions.
Lifetime after-sales support from RanCheng Machinery.
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