DEVICE FOR MUTUAL RESERVOIR ISOLATION INSIDE WELL Russian patent published in 2008 - IPC E21B33/124 

FIELD: oil and gas production, particularly well interior separation for reservoir isolation one from another.

SUBSTANCE: device comprises packing members with elastic collars and reaming members, seating tool connected to lifting pipes and having lower part telescopically put on technological pipe, anchor, well screen and check valve. Each reaming member except for upper one is connected to body of each next upper packing member from below through intermediate pipe or pipes. Lower packing member body is secured to support pipes. Well screen is included in support pipe and/or one or several intermediate pipes opposite to each reservoir to be developed or treated. Check valve is located over upper well screen. Reaming member is made as thrust secured to telescoping pipe. Thrust of upper packing member has inner cavity and is connected to upper telescopic pipe by shear members so that the thrust may slide with respect to the pipe in axial direction. Thrust sliding is limited by upper annular widened section of upper telescopic pipe arranged inside thrust. Anchor is located over upper packing member thrust.

EFFECT: possibility to operate in wells having non-calibrated inner diameter, increased air-tightness of well interior separation.

2 cl, 1 dwg