Tool for closing a production column in a well

A tool for closing a production column in a well containing fluid under pressure and designed to be lowered on the end of a suspension cable and to be temporarily fixed coaxially inside a sleeve of a tool connector incorporated in the production column, said connector being of greater diameter than the remainder of said column, said tool including the improvement of a valve member for co-operating with a corresponding valve seat fixed across the inside of said connector in order to close or to open the fluid-passing orifice therethrough;

• said orifice and said valve member being oblong in outline with the valve member being narrower than the width of said orifice;
• the valve member being orientable and capable of being positioned in a first orientation in which it extends longitudinally with the long axis of its outline being substantially parallel to the longitudinal axis of the tool thereby enabling the valve member to pass through said orifice, and along a second orientation where it extends transversely to the longitudinal axis of the tool thereby enabling it to co-operate with said valve seat after passing therethrough for closing said production column.