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Main > Products > Geophysical Cables
Geophysical Cables
Call National for a quick quote (323)-225-5611 on geophysical cables.
National Wire & Cable has decades of real-world experience designing and manufacturing the toughest,
most dependable geophysical cables in the world. Our engineers have the technical knowledge to
deliver cable that meets or exceeds your specifications no matter how harsh the environment.
- Electronic Multi-conductor Instrumentation Cables
- Special-Purpose Oil Rig Cables
- Seismic-Search Cables
- Water & Oil Resistant Cables
SEISMIC STANDARD PRODUCTS
CAPABILITIES
Cable Design
Any mix of:
- insulated copper wires
- coax
- twisted pairs
- subcables
- optical fibers
- Tubing, hose, tension members metal or synthetic
- Jacket-embedded braid for crush/cut resistance
Conductor Wires
Any mix of:
- Regular annealed copper
- High-strength copper-alloys
- Copper-jacketed steel
- Extra-high strand counts
Wire Insulation
- Polypropylene
- HDPE
- LDPE
- Tefzel®
- TFE Teflon®
- FEP Teflon®
- PFA Teflon®
- PVC
- RoHS-compliant-PVC
- Silicone
- Polyurethane
- Polyolefin
- TPR®
- TPE
- cross-linked XLPE
- XLPVC
- Double-insulated wires a specialty.
- Wet-immersion-tested insulations
- High IR insulations
- Striped or number-printed insulation
RFI-Shielding
- Braided wire shields
- one or more layers
- over wires
- cabled wire-bundle.
- In copper
- tinned copper
- silver-plated copper
- nickel-plated copper
- Conetic alloys
- Foil Shields with drain wire
- Using Alum./Polyester
- Copper/Polyester
- Copper foil
- Conetic
- Fernetic magnetic foils
- Combinations of the above
layers to reduce EMP effects.
Cable Jackets
- Polyurethane
- HDPE
- LDPE
- PVC
- Hytrel
- TPR®
- TPE
- RoHS-compliant PVC
- Belted (fully pressure-filled round) cable jackets
- Jackets with embedded re-enforcing braid for cut/crush resistance.
- Double-Layer-Bonded Jackets. Multi-colored.
- Ribbed or Splined jacket outer surface.
- National's "Easy-Drag" splined-surface cable jackets a specialty.
Cable-Forming
- Many cablers, of many sizes
- Planetary cable forming
- Unilay single-direction forming, all layers
- Planetary cable forming
- Contra-helical alternating direction each layer
- Specialty: Patented close-balance pair twisting for digital signaling.
- Pair, Trio, Quad, Quint, Sub-cabling for maximized flexing lifetime.
Cable-Interstice-Filling
- Vistanex®
- WaterGard®
- DPR,
- SecretSauce.
Subcable Components
- Familiarity with API-17E Umbilical cable components.
SEISMIC STANDARD PRODUCTS
 D-2436 TWINAX (Bottom Telemetry): shielded twisted pair cables with 135-ohm controlled impedance, for digital signal use, one of our specialties:
National is recognized in the seismic industry for our trouble-free D2436/D2440 Twinax using our proprietary
"Self-Healing Dielectric" in our "Industry Standard Twinax" widely used to carry digital telemetry in
ocean-bottom seismic-search cables. Literature (PDF)
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 D-2520 Preferred Seismic Towed Streamer Telemetry Twisted Pair (unshielded)
D-2520 Streamer Telemetry pair presents a low-loss 135-ohm impedance when oil-immersed in Kerosene, or Niroma. This product has been tested and qualified for use with Sercel/Syntron digital marine repeaters.
Widely used in US-made original-equipment towed streamer cables. A preferred rugged replacement telemetry pair for use with Sercel/Syntron digital marine repeaters. Literature (PDF)
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