Flapper type pump out pplug

Independent claim 2:

• A Flapper Type Pump Out Plug (FT POP) as claimed in claim 1, further comprising an integrated shear element, such as shear screws or shear rings, for holding the mechanism in a normally closed position. The FT POP is controlled by differential pressure, ensuring a calibrated threshold for flapper opening, allowing activation of tools above the FT POP and subsequent fluid flow. The curvature of the Flapper, in its closed position, forms a metal-to-metal sealing boundary with the Seat CXO and Lower Seat, while O-rings on the Lower Releasing Sleeve contribute to isolating direct pressure from annular pressure.
• a. Dependent claim 2.1:
• The FT POP of claim 2, wherein the integrated shear element ensures secure closure of the flapper until a predetermined differential pressure is reached, initiating the opening mechanism.
• b. Dependent claim 2.2:
• The FT POP of claim 2, wherein the metal-to-metal sealing boundary and O-rings provide an effective sealing configuration for isolating direct pressure from annular pressure during oil well completion operations.

Independent claim 3:

• A Flapper Type Pump Out Plug (FT POP) as claimed in claim 1, further comprising an alternative opening mechanism activated by a shifting tool, with the Flow Tube having a specific profile for tool engagement. The alternative opening mechanism disengages the Segments, allowing the Flow Tube to move upwards, releasing the Upper Releasing Sleeve and Lower Releasing Sleeve, initiating the mechanism to open the Flapper. The Flow Tube, in constant contact with the Flapper through Compression Springs, facilitates the covering of the flapper and opening mechanism after completion of the alternative operation.
• a. Dependent claim 3.1:
• The FT POP of claim 3, wherein the specific profile of the Flow Tube for tool engagement ensures a secure and reliable activation of the alternative opening mechanism.
• b. Dependent claim 3.2:
• The FT POP of claim 3, wherein the Compression Springs between the Flow Tube and Flapper ensure consistent force application during the alternative opening process, maintaining reliability in various downhole conditions.