ARMORED SUBMERSIBLE Power CABLE > 자유게시판

Where a cable includes polypropylene insulation adjoining to a copper conductor, a lead (Pb) layer may be positioned over the polypropylene insulation, which might enhance its temperature ranking (e.g., low voltage armored power cable from about 96 levels C. to about 125 degrees C.). Normally, as polypropylene insulation is stiffer than EPDM insulation, a fabric tape or braid may be foregone when the insulation is polypropylene insulation. For example, the cushion layer 760 can include one or more additional materials such as, for example, talc and/or polypropylene. FIG. 8 exhibits an example of a method 810 that includes a formulation block 812 for formulating a cloth (e.g., a mixture of supplies), an extrusion block 816 for extruding the formulated material, a formation block 820 for forming a cable that can be an armored cable and a utilization block 824 for using the formed cable. A pelletized materials or pelletized materials might be heated and deformed by way of extrusion (e.g., upon publicity to extrusion heat and strain). For example, the cushion layer 760 will be formed by extrusion of fabric about the exterior floor of the metallic shield 750, which generally is a lead (Pb) layer.

In FIG. 7, the instance cable 700 can embrace EPDM insulation because the insulation 730, which may have a wall thickness of approximately 1.6 mm (e.g., approximately 0.065 inch), can embody a lead (Pb) shield because the metallic shield 750, which can have a wall thickness of approximately 0.6 mm (e.g., roughly 0.025 inch), can include crosslinked polyethylene because the cushion layer 760 and might include metallic armor (e.g., galvanized) as the armor layer 780, which might have a wall thickness of approximately 0.Four mm (e.g., roughly 0.015 inch). In FIG. 7, the conductor 710 generally is a strong copper conductor, the insulation 730 will be an EPDM-based insulation, the metallic shield 750 can be a metallic lead (Pb) shield (e.g., a lead (Pb) layer), the cushion layer 760 could be an extruded polyethylene layer that has achieved a desired quantity crosslinked (e.g., crosslinked polyethylene "XLPE") and the armor layer 780 is usually a metallic armor. As defined, conductor and/or assembly geometries could be grouped where geometry of one or more cushion layers could also be appropriately shaped to assist preserve integrity of a number of metallic shields, which may function as gas boundaries that can assist to hinder permeation of fuel (e.g., H2S, and so on.) towards a conductor of a power cable.

FIG. 9 shows an example of the cable 700 throughout an armoring process where a strip of armor 780 is being utilized over an meeting that includes three insulated and barrier layer protected conductors the place every includes a cushion layer 760-1, 760-2 and 760-3. In the example of FIG. 9, the cushion layers 760-1 and 760-3 are surrounded to a better extent by the armor 780 than the cushion layer 760-2, which is proven to be an intermediate component of the assembly while the cushion layers 760-1 and 760-3 are proven to be finish or aspect elements of the meeting that's being armored. In FIG. 7, the cushion layer 760 is exterior to the metallic shield 750 such that it will probably mechanically cushion the metallic shield 750. For instance, the cushion layer 760 can mechanically cushion the metallic shield 750 from power that may be applied by and/or performed by the armor of the armor layer 780, which could also be, for instance, a galvanized metallic armor. For instance, an extruded cushion layer can use a soft but robust polymeric material such that drive applied to a protecting lead (Pb) layer might be absorbed as the cushion deforms, which may also help to scale back indentation depth and size as to the protecting lead (Pb) layer.

Even small residual creases in a lead (Pb) layer from an armoring course of have been shown to cause premature failure as a consequence of effects equivalent to crevice corrosion. As defined, braid could be of a really low hoop energy attributable to the character of the individual fibers and their orientations that make up the braid. Hydrocarbon wells tend to include some quantity of moisture and cable operating temperatures regularly exceed eighty levels C. Under such conditions, the aforementioned braid materials can degrade and may even dissipate comparatively rapidly after set up in a hydrocarbon effectively. An ESP cable that included the aforementioned PET braided materials was subject to brine in a strain vessel for a period of days (e.g., 7 days in a strain vessel at 240 degrees C.). Where a cable is to be a kilometer in length, a limiting rate of 6 meters per minute translates to approximately 167 minutes; whereas, a limiting fee of sixty one meters per minute translates to approximately 16.3 minutes; noting that extrusion can be in excess of roughly 61 meters per minute. In such an instance, the crosslink reaction price will be determined by thickness of the XLPE layer, speed of extrusion of the XLPE layer and temperatures.

When you loved this information and you would like to receive much more information relating to low voltage armored power cable assure visit our own web site.