PLUG FOR DRILLED WELL Russian patent published in 2015 - IPC E21B33/126 E21B23/06 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to plugs for the drilled wells where the fluid flows upwards. Plug (102) with walls (104) contains pipe (112), that can be inserted in the drilled well (102), at least one diaphragm (106) out of material impermeable for fluids. At that at least one diaphragm (106) if secured impermeable for fluids in the pipe (112). At that this at least one diaphragm (106) can take state folded in the direction of pipe (112) and state unfolded in the direction from pipe (112) to walls (104). At that the pipe (112) and specified at lest one diaphragm (106) are made such that in state folded in direction to pipe (112) of the specified at least one diaphragm (106) there is a gap (108) between the specified at least one diaphragm (106) and walls (104), when the pipe (112) is inserted in the drilled well (102). At that the specified at least one diaphragm (106) has at least one fixing element. At that hardness of the specified at least one fixing element exceeds hardness of walls (104), so the specified at least one fixing element (302) can penetrate in walls (104), when the specified at least one diaphragm (106) is pressed to walls (104). At that connection with geometric closure between the specified at least one diaphragm (106) and walls (104). Is ensured besides, the plug contains activated means. At that activation of the activated means results in that specified at least one diaphragm (106) can accept state unfolded in direction from pipe (112) to walls (104).

EFFECT: increased efficiency of the well disconnection in case of damages.

4 cl, 6 dwg