RETRIEVABLE INSERT LANDING ASSEMBLY

摘要

Apparatus and method of positioning and seating a retrievable insert landing assembly in a well bore tubular member with a left hand threaded portion and having a sealing bore above or below the threaded portion. A releasable connecting arrangement secures the landing assembly in a well bore tubular member by engaging with the left-hand threaded portion in the tubular member. The landing assembly has an internal polished bore above the connecting arrangement which slidably and sealingly receives a tubular extension attached to a well string. The connecting arrangement is actuated by lowering the retrievable landing assembly within the tubular member to position the connecting arrangement adjacent the left-hand threaded portion and then lifting up on the landing assembly to lock it with the left-hand threaded portion. The well string is manipulated to actuate the releasable coupling and disconnect the well string from the landing assembly after it is connected with the tubular member. To retrieve the landing assembly, the well string is manipulated to reconnect it with the retrievable landing assembly. The well string is then manipulated to actuate the connecting arrangement to disconnect the retrievable landing assembly from the tubular member so that it may be retrieved. Thus, the retrievable insert landing assembly is mechanically set and mechanically retrieved merely by manipulating the well string on which the landing assembly is lowered into the well bore.