Abstract: A mandrel (10) of simplified construction and reduced cross sectional size for connection in well tubing comprises a cylindrical body (16) defining a main bore (20) for passage of wire line tools therethrough. A longitudinal slot (30) is formed in the cylindrical body (16). A side pocket subassembly (34, 42, 50, and 52) is secured to the body (16) over the longitudinal slot (30) formed in the body. The slot (30) is sized to permit passage of pocket devices only from the main bore (20) through the offset chamber (44) and into the pocket (60). If desired, an orienting member (22) can be provided within the cylindrical body (16).

Abstract: An apparatus for installing and removing flow valves in a well tubing having a plurality of valve receiving side pockets offset from the main bore by providing an orientation sleeve for directing a guide key of a valve handling apparatus in the sleeve, and a shoulder in the sleeve for actuation of the valve handling apparatus. A valve handling apparatus including a support body supporting a longitudinally movable body which includes a guide key pivotally connected at its lower end and yieldably urged outwardly by spring means so that the guide key will readily pass downwardly through any number of orientation sleeves and can selectively install or remove a valve in or from any desired vertically positioned mandrel.