Description
The Fast Hybrid Telemetry (FHT) is the most critical component of a cased hole logging system; it links the surface panel and the rest of the sensors connected below via a Half Duplex communication. The FHT is the fastest telemetry in the market, with a Wireline Bus (WLB) of up to 400Kbps and an Internal Bus (OWB) of 1.5Mbps.
The FHT can uplink analog packages in between digital packages, so you have the option to combine different types of tools on the string.
FHT can be used with Scientific Data Systems panels and their software Warrior.
Version “A” is the most basic configuration with an uplink of up to 120kbps and an internal Bus of 500kbps.
Version “B” is the most powerful configuration, with an uplink of up to 400kbps and an internal Bus of 1.5Mbps.
Specifications
| Communication | Half Duplex with parity control and checksum |
| Wireline Bus
for Cased Hole |
Uplink 60Kbps to 400Kbps
Downlink 5Kbps |
| Wireline Bus
for Open Hole |
Uplink 120kbps to 800Kbps
Downlink 5Kbps |
| One Wire Hybrid Bus (Internal Bus) | 1.5Mbps |
|
Tool Head Voltage |
70VDC – 300VDC |
|
Temperature rate |
177 deg C / 350 deg F |
|
Pressure rate |
117.2 MPa / 17,000 psi |
|
Current |
Tool Power Hybrid Bus up to 5Amps @ 18VDC to 70VDC for tool string, shunt regulator option is available for 2Amps |
|
Analog signal |
Compatible |
|
Memory tools |
Compatible |
|
Type of cables |
7/32”, 5/16”, 7/16”, 9/32″ – H2S and Open hole cables |
|
Type of tools supported |
Cased hole and Open hole |
|
Dimensions |
1-11/16” (43mm) O.D. by 27” (685.8mm) Long |
|
Memory minimum sampling rate |
1μs |
|
Multi-sampling rates |
each sensor can have different sampling rate |
|
Signal |
the signal is retrieve through an analog equalizer and a digital equalizer all done through an adaptive system |
|
Error detection |
the system offers error data and frame error data. In case the data get corrupted, it will be discarded |
|
Tool bus |
the telemetry can use the following protocols to communicate with different tools:
|
|
Internal Memory |
in addition the telemetry have a 32GB internal memory per sensor. The system offers the flexibility to retrieve the data from the memory in real time or memory mode as a stand alone memory tool |
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