In one embodiment, an air-blown optical fiber unit includes one or more optical fibers, an inner layer substantially completely embedding the one or more optical fibers, and an outer layer radially external to the inner layer. The inner layer has a tensile strength of from 0.1 MPa to 1 MPa, and an elongation at break of from 10% to 80%.

A method of conveying a fiber optic cable through a conduit having an inside diameter involves connecting an interior pig assembly to a far end of the fiber optic cable, the interior pig assembly having an outside diameter smaller than the conduit inside diameter, and inserting the interior pig assembly into the conduit. To convey the fiber optic cable through the conduit, the interior pig assembly may be magnetic, and an exterior assembly including a magnet outside the conduit may be used to pull the interior pig assembly pig through the conduit. In addition or alternatively, a gas may be injected into the conduit to push the pig assembly through the conduit.

A method for deploying a fiber optic line from a surface to a desired location in a wellbore includes the steps of identifying a heater cable deployed in the wellbore, where the heater cable includes one or more conductors and a first capillary tube. The method continues with the step of loading a terminal end of the fiber optic line into the first capillary tube from the surface. Next, the method includes the step of pumping a working fluid into the first capillary tube from the surface to inject the fiber optic line through a portion of the first capillary tube. The method concludes with the step of stopping the injection of the fiber optic line when the terminal end of the fiber optic line reaches the desired location in the wellbore.

The disclosed method may include (1) mechanically coupling a first fiber optic cable duct to a powerline conductor, (2) attaching an end of the first fiber optic cable duct to a first port of a duct coupler, (3) attaching an end of a second fiber optic cable duct to a second port of the duct coupler, where the duct coupler forms a contiguous channel with the first fiber optic cable duct and the second fiber optic cable duct, (4) mechanically coupling the second fiber optic cable duct to the powerline conductor, and (5) installing a contiguous fiber optic cable within the contiguous channel. Various other methods, apparatuses, and systems are also disclosed.

The disclosed method may include (1) mechanically coupling a first fiber optic cable duct to a powerline conductor, (2) attaching an end of the first fiber optic cable duct to a first port of a duct coupler, (3) attaching an end of a second fiber optic cable duct to a second port of the duct coupler, where the duct coupler forms a contiguous channel with the first fiber optic cable duct and the second fiber optic cable duct, (4) mechanically coupling the second fiber optic cable duct to the powerline conductor, and (5) installing a contiguous fiber optic cable within the contiguous channel. Various other methods, apparatuses, and systems are also disclosed.

A cable assembly is provided, adapted to be installed into a duct by means of a combination of blowing and mechanical feeding. The cable assembly comprises: at least one flexible signal transmitting member for transmitting optical signals, a first layer surrounding said at least one signal transmitting member such that at least one signal transmitting member is in touching contact with said first layer, and a second layer arranged outwardly of said first layer, said second layer being a non-thermoplastic layer comprising a non-thermoplastic, crosslinked polyethylene material. A method of producing the cable assembly is also disclosed.

A cable introduction assembly that can include: a spool assembly including a spool having a first axis, the spool configured to retain a cable wound around the first axis in an undeployed mode; and a spool mount assembly configured to retain the spool and introduce the cable in a deployed mode into a conduit configured for a downhole environment, the conduit having a proximal end and a distal end, the cable in the deployed mode extending from the proximal end towards the distal end, wherein the spool assembly is configured to provide a handedness to the cable in the deployed mode.

A cable introduction assembly that can include: a spool assembly including a spool having a first axis, the spool configured to retain a cable wound around the first axis in an undeployed mode; and a spool mount assembly configured to retain the spool and introduce the cable in a deployed mode into a conduit configured for a downhole environment, the conduit having a proximal end and a distal end, the cable in the deployed mode extending from the proximal end towards the distal end, wherein the spool assembly is configured to provide a handedness to the cable in the deployed mode.

A fiber optical connector assembly with a crimp tube assembly improves tensile load on the optical fiber cable or microduct jacket when the connector assembly is used as part of an optical network that is secured between towers spaced apart 1,000 meters or more. The crimp tube assembly has one or more crimp zones, and the crimp tube assembly has a lip formed on an inner surface of the crimp right assembly to improve tensile strength when the crimp tube assembly is secured to a back post of a first fiber optic connector assembly that is air blown or push through a duct or conduit. An epoxy resin may be injected into a cavity between the cable jacket and the crimp tube assembly to improve tensile load strength.

A fibre optic accessory for attachment to the end of an optical fibre is described, the fibre optic accessory comprising a plurality of grooves extending longitudinally along a portion of its outer surface. Using this accessory, an optical fibre to which this accessory is affixed may be installed in an installation tube with the use of a source of compressed air. A kit of parts for such an installation, an optical fibre and a method of installation are also described.