ARMORED SUBMERSIBLE Power CABLE > 자유게시판

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In some embodiments, a metallic shield layer may be formed as a conductive material tape, braid, paint, or extrusion layer. As to a braid or a braided layer, varied types of materials could also be used resembling, for instance, polyethylene terephthalate (PET) (e.g., utilized as a protecting braid, tape, fabric wrap, and many others.). In the example of FIG. 5, the MLE 500 (or "lead extension") a conductor 510, a conductor shield 520, insulation 530, an insulation shield 540 and/or a metallic shield 550, one or more other barrier layers 560, a braid layer 570 and armor 580. While the instance of FIG. 5 mentions MLE or "lead extension", it could also be implemented as a single conductor assembly cable for a number of of quite a lot of downhole uses. In other embodiments, an insulation shield layer may be adhered to an insulation layer utilizing an acceptable adhesive or adhesives based mostly on one or more of the respective supplies of the insulation layer and insulation shield layer. For example, a non-metallic shield could also be comparatively gasoline impermeable. In the instance of FIG. 6, the cable 610 with the circular cross-sectional form has an area of unity and the cable 630 with the oblong cross-sectional form has area of about 0.82. As to perimeter, the place the cable 610 has a perimeter of unity, the cable 630 has a perimeter of about 1.05. Thus, the cable 630 has a smaller quantity and a larger floor space when in comparison with the cable 610. A smaller quantity can provide for a smaller mass and, for example, much less tensile stress on a cable which may be deployed a distance in a downhole surroundings (e.g., as a result of mass of the cable itself).

An extruded cushion layer can present improved lead (Pb) barrier crush resistance from the armoring course of when in comparison with a braided approach that makes use of nylon or polyethylene terephthalate string. As to material cost, the cable 700 of FIG. 12 can exhibit lesser material price when compared to the cable 1200 of FIG. 12. As extrusion can make the most of a uncooked base polymer, the price of shopping for a resin that has been formed into a fiber or tape might be averted, because the resin could be purchased in raw materials pellet form for a lowest possible material value. PET may be thought-about as a low price and high energy material. As mentioned, insulation could also be formulated as a compound with a number of alkane-primarily based peroxides that can provide for radical polymerization where the a number of alkane-based mostly peroxides type radicals that can type decomposition products, which can have a most molecular weigh less than about 100. In such an example, the decomposition merchandise may be non-aromatic. In some embodiments, the insulation shield layer is formed from a hydrogenated nitrile butadiene rubber (HNBR). For instance, a metallic shield layer could also be applied over an insulation shield layer. For instance, a cable could also be formed with phases split out from one another where every part is encased in solid metallic tubing.

For example, a conductor (e.g., strong or stranded) may be surrounded by a semiconductive materials layer that acts as a conductor shield where, for instance, the layer has a thickness larger than approximately 0.005 inch (e.g., approximately 0.127 mm). In such an example, as soon as downhole, the function of the braid may be minimal. In such an example, the metallic shield layer may function a ground airplane. In some embodiments, an insulation shield may be strippable (e.g., low voltage armored power cable to permit for termination and electrical testing of the cable). In Table 1, the insulation can embrace a shield that is non-metallic and/or a shield that's metallic. In such an instance, the protective layer can embrace XLPE that has been extruded to kind a stable XLPE layer about the lead (Pb) barrier layer. In some embodiments, the insulation shield layer is formed from a FEPM polymer, reminiscent of AFLAS® 100S polymer. In the geometry of the ability cable 702, three assemblies are proven where every meeting features a conductor 710 (e.g., a considerably pie shaped conductor with an arc span of approximately a hundred and twenty levels), insulation 730 (e.g., a substantially pie shaped layer of insulation that surrounds the conductor 710), a metallic shield 750 (e.g., a considerably pie shaped layer of lead (Pb) that surrounds the insulation 730, and a cushion layer 760 (e.g., a considerably pie shaped layer of material that surrounds the metallic shield 750. As shown, the three assemblies may be grouped (e.g., A hundred and twenty levels each to form a circular cross-part of 360 levels) and a number of additional layers could be applied that surrounds the three assemblies the place a number of of such layers can embody armor.

A dramatic lower in the storage modulus of pure PP was observed at approximately 165 levels C. because of the melting point of PP. Specifically, the melting point and melting enthalpy modified from approximately 113.6 degrees C. and 110.3 J/g for uncured sample to roughly 114.5 levels C. and 106.1 J/g for absolutely cured pattern, respectively. As an example, a metallic shield layer may be a kind of barrier layer that aims to offer safety against migration of fuel from an exterior area to an inside area. In some embodiments, an insulation shield layer is extruded over an insulation layer. In some embodiments, an insulation shield layer may be substantially bonded to an insulation layer (e.g., through cross-linking, and so forth.). For some embodiments, an insulation shield layer could also be co-extruded with an insulation layer. In but different embodiments, an insulation layer may be extruded in a primary extrusion process and an insulation shield layer applied as a partially completed cable is re-run back through the extruder, comparable to in a two-cross extrusion methodology. As an example, a metallic shield layer could also be formed from various metallic materials including, but not limited to: copper, aluminum, lead, and alloys thereof. For example, the cushion layer 760 can include a number of further materials reminiscent of, for example, talc and/or polypropylene.