Downhole flow control devices

A valve assembly comprising:

• a) a housing having at least one axial fluid conduit and at least one valve body receptacle, said receptacle having an inlet aperture communicating between said receptacle and an exterior environment and an outlet aperture communicating between said receptacle and said axial fluid conduit;
• b) a valve body substantially disposed within said receptacle;
• c) at least one actuator operably connected to said valve body whereby said body is moveable and facilitates communication between said inlet aperture and said outlet aperture such that fluid movement between said exterior environment and said axial fluid conduit is enabled and controlled.

a) a ported housing having an I.D. and an O.D., said housing having at least one housing port;

• b) a choke sleeve disposed against the O.D. of said ported housing;
• c) an inner sleeve disposed against the I.D. of said ported housing, said inner sleeve being moveable independently of said outer sleeve:
• d) a drive system including two gear trains, a first connected at a first end to at least one driver and at a second end to an inner sleeve and a second gear train connected at a first end to a second driver and at a second end to the choke sleeve.

A downhole choke mechanism comprising:

• a) a cylindrical ported housing having at least one port;
• b) a cylindrical downstop disposed radially inwardly and adjacent said ported housing, said downstop including an annular milled portion that together with said ported housing creates a longitudinal recess;
• c) a sleeve disposed radially inwardly and adjacent said ported housing and longitudinally aligned with said downstop, said sleeve further including a seal nose sized to be sealingly accepted in said annular longitudinal recess said sleeve being longitudinally moveable to selectively and variably position said seal nose whereby flow through said at least one port is controllable.

A downhole choke mechanism comprising:

• a) a cylindrical inner housing having at least one helical groove pattern cut on an O.D. thereof said housing being;
• a) a cylindrical outer housing protecting said inner housing and having at least one port therein;
• b) at least one key received in at least one key slot and moveable into said groove to choke flow of a fluid moving in said groove.

A choke mechanism comprising:

• a) a housing having at least one port;
• b) a decreasing radius inner sleeve, said sleeve being disposed radially inwardly of said housing and said decreasing radius in conjunction with said housing defining an increasing dimension flow path, said inner sleeve further including a port to communicate said flow path with an axial flow conduit;
• c) a drive system associated with said inner sleeve capable of rotating said sleeve to align a desired section of said increasing dimension flow path with said at least one port of said housing.

A choke mechanism comprising:

• a) a housing having a plurality of orifices therein;
• b) an inner sleeve disposed radially inwardly of said orifices and adjacent said housing;
• c) a drive system capable of axially moving said inner sleeve to selectively conceal and reveal a selected number of said orifices.