ARMORED SUBMERSIBLE Power CABLE
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As explained, conductor and/or meeting geometries could be grouped the place geometry of one or more cushion layers could also be appropriately shaped to assist preserve integrity of a number of metallic shields, which can function as fuel barriers that might help to hinder permeation of gas (e.g., H2S, and so forth.) towards a conductor of a energy cable. Within the geometry of the facility cable 702, three assemblies are shown where every assembly features a conductor 710 (e.g., a substantially pie shaped conductor with an arc span of roughly 120 levels), insulation 730 (e.g., a substantially pie formed layer of insulation that surrounds the conductor 710), a metallic shield 750 (e.g., a considerably pie formed layer of lead (Pb) that surrounds the insulation 730, and a cushion layer 760 (e.g., a considerably pie shaped layer of fabric that surrounds the metallic shield 750. As proven, the three assemblies may be grouped (e.g., 120 degrees every to form a circular cross-section of 360 levels) and a number of additional layers could be utilized that surrounds the three assemblies the place one or more of such layers can embrace armor. As an example, a cushion layer can embrace material that may be crosslinked post-extrusion. Once mixed and extruded, the stable polymer cushion will slowly crosslink.
In some embodiments, the insulation shield layer is formed from a FEPM polymer, corresponding to AFLAS® 100S polymer. In some embodiments, an insulation shield layer can be formed from a FKM polymer. In some embodiments, a barrier layer could also be formed as an extruded layer whereas in different embodiments a barrier layer may be formed as a taped layer. For instance, in embodiments that embody an HNBR insulation shield layer extruded over an EPDM insulation layer, the insulation shield layer may impart enhanced injury resistance along with improved resistance to well fluids and gases to the cable. For example, a cushion layer can include carbon black. Such one or more cushion layers can help to preserve integrity of a number of metallic shields from a producing course of corresponding to, for instance, an armoring course of. For example, carbon black and/or one or more different supplies could help to protect against UV and/or different radiation. As an example, stiffness of XLPE might be improved by compounding with mineral or carbon fillers and/or with higher stiffness polyolefins (corresponding to a polypropylene homopolymer). FIG. 18 shows a plot 1800 of DMA measurements (storage modulus versus temperature) for uncured and fully cured pure XLPE as well as pure PP, uncured XLPE/PP 75/25 and uncured XLPE/PP 50/50 wt % blends.
FIG. 21 shows a plot 2100 as to fluid uptake percentage with respect to PP-talc wt %. FIG. 7 reveals an instance of a energy cable 700, an instance of a energy cable 701, and an example of a energy cable 702 the place the ability cable 700, 701 and/or 702 could also be appropriate to be used in the system 300 of FIG. 3 or optionally in one or more other programs (e.g., SAGD, etc.). For example, a pump system can embrace a pump; a submersible electric motor operatively coupled to the pump; and a energy cable for delivery of electrical energy to the submersible electric motor, the place the power cable features a conductor, a lead (Pb) barrier layer disposed about the conductor, a cushion layer disposed in regards to the lead (Pb) barrier layer where the cushion layer consists of crosslinked polyethylene (XLPE), and metallic armor wrapped about the cushion layer. As mentioned, a person cushion layer might encompass a person one of a metallic shield the place such a cushion layer may be considerably circular in form, substantially pie shaped, low voltage armored power cable or one other shape. As an example, a metallic shield layer may be formed from quite a lot of metallic supplies together with, however not limited to: copper, aluminum, lead, and alloys thereof.
In but different embodiments, an insulation layer could also be extruded in a first extrusion course of and an insulation shield layer utilized as a partially completed cable is re-run again by way of the extruder, such as in a two-cross extrusion method. In some embodiments, a metallic shield layer could serve to electrically isolate the phases of the cable from one another. In such an instance, the metallic shield layer might function a ground aircraft. In some embodiments, an insulation shield layer could also be considerably bonded to an insulation layer (e.g., by way of cross-linking, and so on.). For instance, insulation and shield may be strippable as a unit, for example, the place considerably cross-linked at an interface between the insulation and the shield. As an example, a cable may be freed from or relatively freed from dielectric materials similar to, for instance, fluoroplastics and/or PEEK. For instance, an insulation shield layer can optionally be a semi-conductive layer utilized over an insulation layer to minimize electrical stresses in a cable.
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