Optical transducer with integrated feedthrough

摘要

An optical transducer is provided. A “measuring” portion of the transducer may be exposed to a high pressure and fluids when the optical transducer is deployed (e.g., in a wellbore or other industrial setting). The transducer may include an optical waveguide with a first portion that forms a first seal that isolates an “instrumentation” portion of the transducer from exposure to the high pressure and fluids to which the measuring portion may be exposed. The transducer may also include a second seal with a “stack” of material elements that contact a second portion of the optical waveguide to also isolate the instrumentation portion of the transducer from exposure to the high pressure and fluids to which the measuring portion may be exposed.

主权项

1. An optical transducer, comprising:
at least one optical waveguide; at least one sensing element disposed in a portion of the optical waveguide; a feedthrough element designed to isolate a first portion of the transducer in communication with the sensing element from a second portion of the transducer containing the sensing element, wherein the feedthrough element comprises:
a first seal formed by a first portion of the optical waveguide in contact with a bore extending through a housing of the feedthrough element; anda second seal formed by contact between an arrangement of sealing elements with a second portion of the optical waveguide and an inner surface of the feedthrough housing; and a member in contact with a third portion of the optical waveguide and configured to apply a first pre-loading force to promote sealing of at least the first seal, wherein the third portion of the optical waveguide has a greater outer diameter than the first and second portions of the optical waveguide.