Abstract: A wired pipe signal transmission testing apparatus is provided. The apparatus includes a core having a plurality of threads formed on a surface thereof and a plurality of slots cutting through crests and roots of at least a portion of the threads, thereby creating an escape route for debris that may enter in between the threads. The apparatus includes an inductive transducer coupled to the core.

Abstract: A wired pipe signal transmission testing apparatus is provided. The apparatus includes a core having a plurality of threads formed on a surface thereof and a plurality of slots cutting through crests and roots of at least a portion of the threads, thereby creating an escape route for debris that may enter in between the threads. The apparatus includes an inductive transducer coupled to the core.

Abstract: A payout tube for enabling payout of filamentary material having inherent twist characteristics from a coil of the filamentary material wound in a figure 8 configuration with a payout hole extending from the inner layer to the outer layer of the coil, wherein the payout hole has an oval or diamond shape; an inner end of the payout tube being adapted for insertion into the payout hole and having an oval or diamond shape corresponding to the oval or diamond shape of the payout hole, the payout hole having a diameter of at least ninety degrees; the payout tube having an inner diameter increasing in size from the inner end to the outer end thereof; and a collar formed around the outer end to support the payout tube against the outer surface of a container.