Convertible autofill float equipment having poppet valve and interlock

A float assembly for use on a tubing string having a throughbore for fluid flow, the float assembly comprising:

• a housing configured to couple to the tubing string, the housing defining a flow passage therein, the flow passage communicating with the throughbore of the tubing string and having a seat;
• and
• a valve comprising:
• a support disposed in the flow passage;
• a primary biasing element disposed on the support;
• a poppet movably disposed on the support and being biased by the primary biasing element from an opened position to a closed position relative to the seat, the poppet in the opened position being disengaged from the seat and being configured to permit fluid flow through the flow passage, the poppet in the closed position being engaged with the seat and being configured to prevent fluid flow in an upbore direction through the flow passage;
• and
• an interlock arranged relative to the poppet and the support and having a surface area and a secondary biasing element, the surface area being exposed to fluid flow in the flow passage,
• the interlock being activatable from a locked state to an unlocked state in response to a level of fluid flow in a downbore direction against the surface area, wherein the interlock comprises an inner sleeve and an outer sleeve, the inner sleeve arranged relative to the poppet and the support and being connected by a releasable connection to the poppet, the outer sleeve disposed on the inner sleeve and being movable at least from the locked state to the unlocked state, the secondary biasing element being engaged between the outer sleeve and the support and biasing the outer sleeve to the locked state, the outer sleeve moved to the unlocked state being configured to urge the inner sleeve and the releasable connection to release from one another,
• the interlock in the locked state being configured to hold the poppet in the opened position,
• the interlock in the unlocked state being configured to release the poppet biased toward the closed position by the primary biasing element.

A method used for a tubing string in a wellbore, the tubing string having a throughbore for fluid flow, the method comprising:

• deploying the tubing string in the wellbore while allowing fluid flow in an upbore direction and a downbore direction though a poppet valve biased with a primary biasing element by holding the biased poppet valve in an open position with an interlock biased by a secondary biasing element to a locked state;
• and
• restricting fluid flow to only the downbore direction through the throughbore by:
• pumping fluid flow in the downbore direction at a predetermined level against a surface area of the interlock;
• releasing the interlock from the locked state to an unlocked state by moving a body of the interlock against the secondary biasing element in response to the fluid flow at the predetermined level acting in the downbore direction against the surface area of the body of the interlock;
• disengaging the biased poppet valve from the interlock in the unlocked state by converting the interlock in response to the movement of the body from the locked state engaged with the biased poppet valve in the open position to the unlocked state disengaged from the biased poppet valve;
• biasing the biased poppet valve toward a closed position with the primary biasing element;
• and
• allowing fluid flow only in the downbore direction though the biased poppet valve disengaged from the interlock.