Patent ID: 6478086
Filing Date: 2002-11-12
Classification: E21B

Abstract:
A method for providing at least one sensor in a well at a location where a well fluid flows into the well from a subsurface formation surrounding the well, the sensor establishing a well parameter required to be monitored after the well is plugged, comprising:connecting the sensor to the bottom of a first seal having a first connecting part on the top thereof, the sensor and the first connecting part being connected for transferring signals from the sensor to the first connecting part, placing the first seal above the location to plug the well, filling the well above the first seal with a temporarily liquid, settable sealant in an amount of the sealant so that the sealant alone plugs the well after it has set, before the sealant has set, lowering a first connecting device with a fourth connecting part into the sealant, the first connecting device being suspended on a cable, and connecting the fourth connecting part the first connecting part, both the lowering and the connection of the fourth connecting part to the first connecting part being provided by the weight of the first connecting device, and connecting the cable to a logging device outside the well so that after the sealant is set, signals from the sensor are transferable to the logging device via the first connecting part of the first seal, the fourth connecting part, and the cable.