CA2187434A1 - Computer controlled downhole tools for production well control - Google Patents

Abstract

A plurality of electronically controlled downhole tools and systems for use in production wells is presented. These tools and systems include a safety valve position and monitoring system, where pressure is measured upstream and downstream the valve, at the hydraulic valve control line and in the annulus between the valve housing and the wellbore; a proximity sensor provides information about the valve position; an inflatable packer having a motor operated valve for closing and opening the inflation fluid passage; a tool stop located in a side pocket mandrel having a threaded shaft operated by an electric motor and a stop pivotably connected to the shaft for being raised from a position within the side pocket into the main passage of the mandrel for blocking the main passage in order to stop other tools being run into the wellbore; a fluid/gas control system located in a side pocket mandrel comprising a motor connected to a gas regulator section and a fluid regulator section followed by a telescopic section which allows the regulator sections to be shifted axially with respect to a lateral inlet port provided in the side pocket; a shut-off valve and variable choke assembly comprising two ball valve chokes having sequentially smaller apertures and a ball shut-off valve, all valves being connected to the drive shaft of a stepper motor; a downole sensor comprising a side pocket mandrel for removably arranging a sensor for measuring flow parameter or for nation evaluation data.