Abstract: An oil field tubular for use as part of a well string, includes a hollow tube that forms a passage, each end of the tube configured for connection to the end of an adjacent string section to form a continuous string; a flapper, integrally connected within the hollow tube so that the flapper can move between an open position where the flapper allows fluids to pass through the hollow tube and a closed position where the flapper closes the passage and prevents passage of fluids therethrough, the flapper spaced away from the end connections of the hollow tube, the hollow tube further including a recess formed into part of the side wall, the flapper and tube configured so that in the open position the flapper locates into the recess.

Abstract: A float valve for positioning downhole within a wellbore as part of a drill string. The float valve has an outer hollow housing for connection to and location between an upper and lower sections of the drill string. A flap valve is located at least in part within the outer hollow housing to allow or disallow flow of fluid and/or objects through the outer hollow housing via the float valve. A sliding sleeve is located at least in part within the outer hollow housing, to translate at least in part within the outer hollow housing, such that in a first position the sliding sleeve is clear of the flap valve, and in a second position the sliding sleeve retains the flap valve open to allow the flow therethrough.

Abstract: An oil field tubular for use as part of a well string, includes a hollow tube that forms a passage, each end of the tube configured for connection to the end of an adjacent string section to form a continuous string; a flapper, integrally connected within the hollow tube so that the flapper can move between an open position where the flapper allows fluids to pass through the hollow tube and a closed position where the flapper closes the passage and prevents passage of fluids therethrough, the flapper spaced away from the end connections of the hollow tube, the hollow tube further including a recess formed into part of the side wall, the flapper and tube configured so that in the open position the flapper locates into the recess.

Abstract: A float valve for positioning downhole within a wellbore as part of a drill string. The float valve has an outer hollow housing for connection to and location between an upper and lower sections of the drill string. A flap valve is located at least in part within the outer hollow housing to allow or disallow flow of fluid and/or objects through the outer hollow housing via the float valve. A sliding sleeve is located at least in part within the outer hollow housing, to translate at least in part within the outer hollow housing, such that in a first position the sliding sleeve is clear of the flap valve, and in a second position the sliding sleeve retains the flap valve open to allow the flow therethrough.