Installation and retrieval of pressure control device releasable assembly

A well system, comprising:

• a pressure control device including a releasable assembly and a latch that releasably secures the releasable assembly in an outer housing of the pressure control device, the latch including a piston having set and unset positions, and the releasable assembly including at least one release dog which is extendable into engagement with a release sleeve which acts on the piston, whereby continued displacement of the release dog displaces the piston to the unset position;
• and
• a running tool releasably securable to the releasable assembly, and wherein the running tool includes a lock mechanism that releasably secures the running tool to the releasable assembly, the lock mechanism being operable in response to a change in a fluid flow rate through the running tool.

A pressure control device, comprising:

• a releasable assembly including at least one outwardly extendable release dog;
• and
• a latch that releasably secures the releasable assembly in an outer housing of the pressure control device, the latch including a piston displaceable between a set position, in which the releasable assembly is secured against displacement relative to the outer housing, and an unset position, in which the releasable assembly is released for displacement relative to the outer housing, the piston being configured to displace toward the unset position in response to pressure applied to a port in the outer housing, and the piston being configured to displace toward the unset position in response to displacement of a profile of the latch by the release dog.