Abstract: A permanently installed, remotely monitored and controlled transient pressure test system is provided. This system utilizes shut-in/choke valves, pressure sensors and flow meters which are permanently associated with the completion string to perform transient pressure tests in single and multiple zone production and injection wells. The present invention permits full bore testing which thereby eliminates undesirable wellbore storage effects. The present invention further allows for pressure testing limited only to a selected zone (or zones) in a well without expensive well intervention and without halting production from, or injection into, other zones in the well. The permanently located pressure test system of this invention also allows for real-time, downhole nodal sensitivity and control. This pressure test system may be permanently deployed either in production wells or injection wells.

Abstract: Computer control and sensory information are combined with gas lift valve having a plurality of individual openings which are openable or closeable individually to provide varying flow rates of the lift gas. Each of the openings is controlled and is sensitive to downhole sensors.

Abstract: A permanently installed, remotely monitored and controlled transient pressure test system is provided. This system utilizes shut-in/choke valves, pressure sensors and flow meters which are permanently associated with the completion string to perform transient pressure tests in single and multiple zone production and injection wells. The present invention permits full bore testing which thereby eliminates undesirable wellbore storage effects. The present invention further allows for pressure testing limited only to a selected zone (or zones) in a well without expensive well intervention and without halting production from, or injection into, other zones in the well. The permanently located pressure test system of this invention also allows for real-time, downhole nodal sensitivity and control. This pressure test system may be permanently deployed either in production wells or injection wells.

Abstract: A plurality of electronically controlled downhole tools and systems for use in production wells is presented. These tools and systems include safety valve and pressure monitoring systems, remotely controlled inflation/deflation devices, remotely actuated downhole tool stop systems, remotely controlled fluid/gas control systems, remotely controlled variable choke and shut-off valve systems and a retrievable sensor side pocket mandrel.

Abstract: A plurality of electronically controlled downhole tools and systems for use in production wells is presented. These tools and systems include safety valve and pressure monitoring systems, remotely controlled inflation/deflation devices, remotely actuated downhole tool stop systems, remotely controlled fluid/gas control systems, remotely controlled variable choke and shut-off valve systems and a retrievable sensor side pocket mandrel.

Abstract: The method includes running a liner, production packer and polished bore receptacle (PBR) into a well on the production tubing string, cementing the liner in place by pumping cement through the production tubing string, setting the packer, and optionally thereafter releasing an upper portion of the tubing string from a PBR. A seal assembly isolates the PBR bore from cement exposure during liner cementation. Annular pressure produces a reverse fluid surge and circulating flow to prevent PBR seal area contamination when the tubing string is lifted away from the PBR. A connecting assembly 12 is suspended from a production tubing string 11 to position a liner 17 in a wellbore. The connecting assembly transmits rotational and longitudinal forces from the production tubing string to properly position and cement the liner in the wellbore.