TWO-WAY PLUGS FOR WELLS

摘要

TWO-WAY PLUGS FOR WELLS A plugging device is described for installation as by wireline tools in a receptacle in a well flow conductor for plugging the flow conductor against flow from below as well as from above. The plugging device includes a tubular housing (100) having seals (76) for sealing with the receptacle and lock members (74) for anchoring it therein. A mandrel (104) is reciprocable in the housing between lower and upper positions for moving the lock members to locking position and for allowing them to move to unlocking position. A plug member (102) closes the housing and is movable relative thereto between lower and upper positions and there is a locking mechanism for locking the plug member to the mandrel whenever the mandrel is in its lower position and the plug member is moved to its upper position to prevent the mandrel from being moved to its unlocking position. A running tool is provided for installing the plugging device which will not release the device unless it is properly installed in the receptacle. (Figs. 4A /A 4B)