Geophysical Cable

National Wire Geophysical and Seismic Search Cables

Custom Made for
• electronic
instrumentation
• special purpose oil rig
• marine applications
• seismic search
towed arrays

National Wire & Cable has decades of real-world experience designing and manufacturing the toughest, most dependable geophysical cables in the industry. Our engineers have the technical knowledge to deliver cable that meets or exceeds your specifications no matter how harsh the environment.

Capabilities for Cable Assemblies

Cable Design and Conductor Wires

For Cable Design, select any mix of:
• insulated copper wires
• coax
• twisted pairs
• subcables
• optic fibers
• tubing, hose, tension members metal or synthetic
• jacket-embedded braid for crush/cut resistance

For Conductor Wires, select any mix of:
• regular annealed copper
• high-strength copper-alloys
• copper-jacketed steel
• extra-high strand counts

Wire Insulation and RFI-Shielding

For Wire Insulation, select from:
• 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 National specialty)
• wet-immersion-tested insulations
• high IR insulations
• striped or number-printed insulation /b>

For RFI Shielding, select from or combine:
• braided wire shields
• one or more layers
• over wires
• cabled wire-bundle
• 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
• layers to reduce EMP effects

Cable Jackets and Cable Forming

For Cable Jackets, select from:
• 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
• "Easy-Drag" splined-surface cable jackets (a National specialty)

For Cable Forming, select from:
• 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 and Subcable Components

For Cable-Interstice-Filling, select from:
• Vistanex®
• WaterGard®
• DPR
• SecretSauce

Subcable Components:
• familiarity with API-17E Umbilical cable components

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.

Colors: This cable product is available with a choice of colors for the outer jacket. The part number to specify a given color is shown below.

D2436-5 - Jacket Color, Green - Pair Color, Green paired with Natural Trans.
D2436-6 - Jacket Color, Blue - Pair Color, Green paired with Natural Trans.

DOWNLOAD Literature (PDF)

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.

Color Code: This cable is available with a choice of colors for the two paired wires. The part number suffix (-X) shown below is used to specify a given color combination. Colors will be pastel.

Natural Trans Paired with Black: -0
Natural Trans Paired with Brown: -1
Natural Trans Paired with Red: -2
Natural Trans Paired with Orange: -3
Natural Trans Paired with Yellow: -4
Natural Trans Paired with Green: -5
Natural Trans Paired with Blue: -6
Natural Trans Paired with Violet: -7
Natural Trans Paired with Gray: -8
Natural Trans Paired with White: -9

DOWNLOAD Literature (PDF)