Cable applicable to environment in oil and gas well and used for connection of wireless transmitting antenna as well as production technology thereof

Abstract

The invention discloses a cable applicable to an environment in an oil and gas well and used for connection of a wireless transmitting antenna as well as a production technology thereof. The cable comprises a center filling member, a plurality of insulated wires uniformly distributed at the periphery of the center filling member as well as an outer sheath wrapped outside the center filling memberand the insulated wires. The cable disclosed by the invention has the advantages that a high-temperature-resistant enameled round copper wire is adopted, and the overall outer diameter of the cable isreduced, so that long-term use reliability of the cable is improved, and service life of the cable is prolonged; meanwhile, an insulating layer does not need to be extruded outside a conductor in a production process, so that production working procedures of the cable are fewer, and the technology is simple; long-term tolerable temperature of the insulated wires and an outer sheath material reaches more than 200 DEG C, and the use reliability of the cable in a down-hole high temperature environment is improved; and the outer sheath adopts a pushing type technology, and the outer sheath material fills gaps among the insulated wires, so that the cable can stop high temperature liquid moisture from being penetrated into the interior of the cable in a down-hole high temperature and high humidity working environment, and service life of the cable is prolonged.

Description

Technical field [0001] The invention relates to the field of cable manufacturing, in particular to a cable for connecting a wireless transmitting antenna suitable for an oil and gas well environment and a manufacturing process thereof. Background technique [0002] In oil and gas, geological exploration and other drilling projects, the data information of various downhole sensors and measuring devices are generally transmitted to the ground through wireless signals transmitted by antennas, so that engineers and technicians can understand the information downhole in time. For the connection cable between the underground data communication equipment and the wireless transmitting antenna, a high-temperature resistant insulated wire with a suitable temperature grade or a cable stranded with multiple insulated wires can be used according to the underground working temperature. When multiple high temperature resistant insulated wires are used for connection, the overall size of the mul...

AI Technical Summary

Problems solved by technology

When multiple high-temperature resistant insulated wires are used to connect, the overall size of the multiple wires is large, the structure of the wire harness is loose, and the connection and installation are complicated; if the size is reduced and the insulation thickness is reduced, it is easy to cause insulation damage during installation and use.

When a cable with multiple insulated wires twisted is used for connection, not only the overall diameter is relatively thick, it is difficult to install in a small underground space, but also the insulation damage is likely to be caused during the installation process; High-temperature and high-pressure liquids and gases easily penetrate into the gap between the cable conductor and the insulation, thereby reducing the electrical conductivity and insulation of the cable and affecting the service life of the cable; it is also not conducive to the sealing of the connection between the cable and the equipment, affecting the safety of downhole equipment operation

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