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For instance, the conductor shield 420 could also be offered as an extruded polymer that penetrates into spaces between strands of the stranded conductor 410. As to extrusion of the conductor shield 420, it could optionally be co-extruded or tandem extruded with the insulation 430 (e.g., which could also be or include EPDM). For REDALEAD™ cables, metallic lead (Pb) is extruded directly on top of the insulation (see, e.g., the insulation 430 and/or the insulation shield 440) to help forestall diffusion of gas into the insulation (e.g., one or more corrosive gases). A number of layers could also be provided, for instance, to create an impermeable fuel barrier. For instance, a metallic shield layer could also be a kind of barrier layer that aims to provide protection against migration of gasoline from an exterior region to an interior region. For example, an inline longitudinal wrapped gasoline impermeable barrier that features a lead (Pb) alloy tape for gas sealing could also be disposed about individual insulated copper conductors within a multi-section conductor meeting.

For instance, low voltage armored power cable a metallic shield could be a lead (Pb) primarily based shield that is relatively fuel impermeable. A cable can embody armor to impart mechanical integrity. The excessive barrier properties and malleability of metallic lead (Pb) are inclined to make it an appropriate candidate for downhole cable parts. Such tapes or braids are usually plastic (polyester or nylon) or glass fibers which are woven or wrapped across the lead (Pb) covered conductor. As to different examples, nylon or glass fiber tapes and braids could also be carried out. Such an strategy can, for example, assist scale back risk of bulging attributable to deformation of lead (Pb) and thereby help to keep up the integrity of the armor 780. A more symmetrical cable may carry out higher than a cable the place each conductor has deformed lead (Pb) thereabout where the quantity of deformation of lead (Pb) can differ for a number of of the conductors. In some embodiments, cable armor can encase a plurality of wrapped conductors. For example, a cable can embrace multiple conductors where every conductor can carry current of a section of a multiphase energy supply for a multiphase electric motor.

In such an example, the protecting layer can embody XLPE that has been extruded to type a strong XLPE layer in regards to the lead (Pb) barrier layer. In such an example, by use of the cushion layer, a discount might be made in the specifications as to a lead (Pb) wall thickness, which can lead to a lower in cable value and weight. Over time, creep can occur and failure of a number of of the protecting lead (Pb) partitions between conductors. As taped or braided designs have a tendency to supply considerably lesser radial power, when tape or braid is used, protecting lead (Pb) layers, each a few respective conductor, get pressed together in the course of the armoring course of. As talked about, a woven polyester braid layer (e.g., a PET fiber braided layer) may be utilized on a lead (Pb) barrier as a protective warning against damage or deformation during an armoring process. Power cables and MLEs that can resist damaging forces, whether or not mechanical, electrical or chemical, may also help guarantee correct operation of a motor, circuitry, sensors, etc. Noting that a faulty power cable (or MLE) can probably injury a motor, circuitry, sensors, and so forth. Further, as mentioned, an ESP could also be positioned a number of kilometers right into a wellbore.

The extruded cushion layer 760 might be made from a number of materials that can embrace a number of supplies such as chemically resistant polymers as well as crosslinked constructions. As to a braid or a braided layer, varied varieties of supplies could also be used reminiscent of, for instance, polyethylene terephthalate (PET) (e.g., utilized as a protecting braid, tape, fabric wrap, and so forth.). For example, formulating might happen (e.g., wholly or in part) at an extruder site the place, for instance, supplies are blended previous to introduction to an extruder feeder bin. In such an example, the polymeric layer 634 might encapsulate the three 1 gauge conductors and their respective layers the place, at ends, the polymeric layer 634 could also be about 1 mm thick. As an example, a conductor (e.g., solid or stranded) may be surrounded by a semiconductive material layer that acts as a conductor shield where, for instance, the layer has a thickness higher than approximately 0.005 inch (e.g., approximately 0.127 mm). The Young's modulus is the ratio of stress (power per unit area) to strain (dimensionless deformation) in a fabric.