Patent ID: 6158714
Filing Date: 2000-12-12
Classification: E21B,F16K

Abstract:
A throttling valve controllable from the surface of a well for downhole use, comprising:a body securable to downhole equipment or tubulars;a valve member strokable between opposed end positions;said valve member translatable in an opening in said body for throttling of a fluid passing through said body as said valve member changes the size of said opening when moved between said opposed end positions;said valve member comprising a housing, said housing comprises a needle extending adjacent an opening in said housing such that flow is through said housing and out through said opening in said housing and past said needle and through said opening in said body, said housing and said needle translate in tandem in said body;a control system mounted at least in part remote from said body at the surface of said well and operatively controlling said valve member;said control system positions and maintains said valve member in at least one position between said opposed end positions.