Patent ID: 6715558
Filing Date: 2004-04-06
Classification: E21B

Abstract:
A choke tool apparatus for use in a subterranean well operable to control fluid flow between the exterior of the tool and an axial passage within the tool, the choke tool comprising:an outer housing having an outer housing wall with at least one flow port therethrough; and a variable annular flow-area choke disposed within the outer housing, the variable annular flow-area choke having a first generally tubular member sealingly disposed within the outer housing, the first tubular member having a shoulder with a sealing surface, the first member having an end defining an interior space therein, a second generally tubular member sealingly disposed within the outer housing, the second member having a shoulder with a sealing surface, the second member having a substantially tubular projection extending into the interior space of the end of the first member, at least one of the first or second tubular members slidingly disposed in the housing movable between a sealed position wherein the sealing surfaces are in sealing abutment and an open position wherein the sealing surfaces are spaced apart.