184results about "Pin insulators" patented technology

A system and method are provided for providing electromagnetic (EM) measurement-while-drilling (MWD) telemetry capabilities using an existing mud-pulse MWD tool. An EM tool intercepts the output from the mud-pulse tool and generates an EM signal that mimics a mud-pulse pressure signal. The EM signal is intercepted at the surface by a receiver module that conditions the signal and inputs the signal into the existing pulse tool receiver. Since the EM signal mimics a mud-pulse signal, the pulse tool receiver does not require software or hardware modifications in order to process an EM telemetry mode. The EM tool can be adapted to also provide dual telemetry by incorporating a conventional pressure pulser that would normally be used with the pulse tool. A gap sub assembly for isolating the drill string is also provided that includes a pair of subs whose shoulders are separated by a non-conductive ceramic material and whose threads are separated by an insulative material, preferably a Kevlar™ cloth.

Cable foil tape having random or pseudo-random patterns or long pattern lengths of discontinuous metallic shapes and a method for manufacturing such patterned foil tape are provided. In some embodiments, a laser ablation system is used to selectively remove regions or paths in a metallic layer of a foil tape to produce random distributions of randomized shapes, or pseudo-random patterns or long pattern lengths of discontinuous shapes in the metal layer. In some embodiments, the foil tape is double-sided, having a metallic layer on each side of the foil tape, and the laser ablation system is capable of ablating nonconductive pathways into the metallic layer on both sides of the foil tape.

Communication cable including insulated conductors and a composite tape having an insulative layer and a conductive layer. The composite tape includes first and second lateral sections that are folded over each other to form a shielding tape. The shielding tape includes opposite inner and outer sides that are formed from the first and second lateral sections, respectively, and a folded edge that joins the inner and outer sides. The conductive layer defines the inner side, the outer side, and the folded edge. The shielding tape is wrapped helically about the insulated conductors a plurality of times along a length of the communication cable to form a plurality of wraps. The inner side of a subsequent wrap of the shielding tape overlaps a portion of the outer side of a prior wrap of the shielding tape.

A foamed coaxial cable with high precision according to the present invention comprises: an internal conductor twisted with a plurality of electrically conductive wires; a foamed insulator with its low dielectric constant made of a porous tape body formed on the outer periphery of this internal conductor; an external conductor made of a number of electrically conductive thin wires braided on the outer periphery of this foamed insulator; and an outer sheath made of a resin having heat resistance formed on the outer periphery of this external insulator, wherein the precision of external diameter of the internal conductor is 4 / 1000 mm or less, the precision of external diameter size of the foamed insulator is ±0.02 mm, the insulator is formed in a completely circular shape, the precision of external diameter size of the external conductor is ±2%, the external conductor is formed in a completely circular shape, and the precision of characteristic impedance value between the internal conductor and the external conductor having the foamed insulator interposed therebetween is ±1 Ω.

An integrated insulator sealing and shielding assembly includes a rubber housing having a plurality of radial weathersheds and a tapered end adjacent an endmost radial weathershed. A metal fitting is disposed adjacent to the endmost radial weathershed and receives the tapered end. A collar assembly is disposed at an upper end of the metal fitting and includes two apertures between an outer surface thereof and the rubber housing for receiving a sealant. At least one sealing surface, preferably four, is disposed between the collar assembly and a bottom end of the rubber housing for securing the connection therebetween.