Abstract: A packer includes one or more anchors for securing the packer in a wellbore and a pair of seal elements that form a fluid seal. The packer assembly is hydraulically set and, thus, it can be located at any desired position within the wellbore. The packer assembly is secured within the wellbore by a staged setting process through use of shear pins that have increasingly stepped shear values. Redundancy in packer sealing is provided by the use of two seal elements to establish fluid sealing. The design of the packer assembly also provides hydraulic isolation of the actuating portions of the packer assembly upon setting.

Abstract: A packer includes one or more anchors for securing the packer in a wellbore and a pair of seal elements that form a fluid seal. The packer assembly is hydraulically set and, thus, it can be located at any desired position within the wellbore. The packer assembly is secured within the wellbore by a staged setting process through use of shear pins that have increasingly stepped shear values. Redundancy in packer sealing is provided by the use of two seal elements to establish fluid sealing. The design of the packer assembly also provides hydraulic isolation of the actuating portions of the packer assembly upon setting.

Abstract: An "Object Cycle" versioning system having an Object Cycle Server is described. The server communicates over a wire or a network for providing versioning services to multiple clients. During a user session, a user invokes operation of the system from within the development environment of the particular client being used. From the perspective of the Object Cycle Server, each client is simply "a client" (without regard to proprietary nature) which desires to store "an object." The Object Cycle Server, in turn, maps the object into a meta model which serves as a container for facilitating version control. With the model, therefore, operations supported by the system for versioning will execute correctly even if the objects are stored in a format other than a relational database, such as an object-oriented database, a file server, or other storage system. The model separates out the name of an object from where the object itself is actually stored.