| 摘要 |
A telemetry apparatus and method for communicating data from a down-hole location through a wellbore to the surface includes a light source 22, an optical fibre 17 surrounded by a protective hull and placed along the length of the wellbore, and receiving light from the light source, a transducer 18 located so as to generate a force field (e.g. a magnetic, electric, acoustic or temperature field) across the optical fibre and its protective hull without mechanical penetration of the hull at the down-hole location, one or more sensors for measuring down-hole conditions and/or parameters and a controller to provide a modulated signal to the force field generator, the modulated signal being representative of measurements by the sensors. Optical detectors 243, 244 adapted to detect changes in the intensity or polarisation of light passing through the fibre are provided in order to recover the data. |
