Downhole shut-in tool
AssigneeStellar Tech Energy Services Inc.
InventorsPaul John Feluch, Boris Timoffee
Life of this patent
Estimating the term…
Abstract
The invention provides a downhole shut-in tool for obtaining formation pressure data. The tool includes a fast-closing main valve and a pressure-relief valve operable between open and closed positions to effect periodic sealing and release of formation pressure with respect to the surface.
Claims19
A shut-in tool for setting and sealing within downhole tubing above a producing formation, the shut-in tool for controlling the flow of fluids from the formation and for collecting data from the formation from at least one data collection system operatively connected to the shut-in tool, the shut-in tool comprising:
- a main valve assembly operably retained within a housing, the main valve assembly including
- a main valve operable between a loaded open position allowing fluid flow from the exterior of the housing through the housing and a closed position that prevents fluid flow from the exterior of the housing through the housing wherein the main valve is triggerable to effect immediate closure of the main valve, the main valve having a ball linearly displaceable within the housing between a sealing surface when in the closed position and the loaded open position and wherein the ball is biased towards the sealing surface.
A shut in tool for setting and sealing within downhole tubing above a producing formation and for collecting data from the formation, comprising:
- a housing having an interior and exterior;
- a main valve assembly within the housing having a main valve, the main valve operable between a loaded open position allowing fluid flow from the exterior of the housing through the housing and a closed position that prevents fluid flow from the exterior of the housing through the housing wherein movement from the loaded open position to the closed position is immediate upon triggering, the main valve having a ball linearly displaceable within the housing between a sealing surface when in the closed position and the loaded open position and wherein the ball is biased towards the sealing surface;
- a pressure relief valve within the housing, the pressure relief valve operable between a relief valve open position allowing fluid flow from the exterior of the housing through the housing and a relief valve closed position that prevents fluid flow from the exterior of the housing through the housing;
- and
- an actuation system for actuating the main valve assembly between the loaded open position and the closed position wherein the actuation system triggers movement of the main valve from the loaded open position to the closed position, the actuation system also for actuating the pressure relief valve between the relief valve open and relief valve closed positions.
Dependencies are inferred from the claim text.