High temperature resistant photoelectric composite optical fiber for oil well and production method thereof

Abstract

The invention aims at providing a high temperature resistant photoelectric composite optical fiber for an oil well and a production method thereof, used for solving the technical problem about high temperature and high voltage resistant performance and convenient production of the photoelectric composite optical fiber. The high temperature resistant photoelectric composite optical fiber for the oil well comprises an optical fiber unit, a conductor unit, a filling unit, a cladding unit and an armoring unit, wherein the optical fiber unit is positioned in a middle eccentric position of the composite optical fiber, and comprises an optical fiber of which the outer layer is coated with polyimide and a stainless steel tube for sleeving the optical fiber; the conductor unit is screwed and twisted with one side of the stainless steel tube; the filling unit is filled in a gap between the optical fiber unit and the conductor unit to jointly form a cable core; the cladding unit and the armoringunit are separately arranged on the outer side of the cable core from the inside to the outside; and the armoring unit comprises inner-layer armoring steel wires and outer-layer armoring steel wires with opposite twisting directions. The high temperature resistant photoelectric composite optical fiber for the oil well has the beneficial effect that the temperature and voltage resistant performanceof the composite optical fiber are improved.

Description

technical field [0001] The invention relates to the technical field of electrical composite optical cables, in particular to a high-temperature-resistant photoelectric composite optical cable for oil wells and a production method thereof. Background technique [0002] In oil extraction, how to efficiently and economically extract crude oil from oil and gas wells has always been an important topic for us. At present, the exploitation of heavy oil wells in our country accounts for a higher and higher proportion in the whole crude oil exploitation. The common method for the exploitation of heavy oil wells is to inject high-temperature and high-pressure steam into the oil wells to increase the temperature of heavy oil and increase its fluidity, so as to achieve the purpose of oil displacement. Therefore, the oil well is a high temperature (up to 250°C) and high pressure environment (>30Mpa). Traditional optical cables or cables for well logging are mainly used in normal tem...

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Problems solved by technology

Traditional optical cables or cables for well logging are mainly used in normal temperature oil wells (<100°C), with low working temperature and low pressure, and cannot be used in the special environment of heavy oil wells. Therefore, in order to solve the above problems, a kind of can be developed. Photoelectric composite cables normally used in high temperature and high pressure environments, and realize optical information and power transmission

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