Abstract: A wellbore tool includes a wellhead to be installed at an entrance to a wellbore formed through a subterranean zone. The wellhead includes an uphole wellhead end that can extend upward from the entrance, and a downhole wellhead end that can extend downhole into the wellhead. The wellhead defines an opening extending from the uphole wellhead end to the downhole wellhead end. A spacer tool is attached to the downhole wellhead end, and includes an uphole spacer tool end and a downhole spacer tool end. The spacer tool defines a tapered opening tapering from end to end. The tool includes a master valve attached to the downhole spacer tool end of the spacer tool. The master valve defines a flow pathway fluidically coupled to the opening defined by the wellhead and the tapered opening defined by the spacer tool.

Abstract: Methods, processes and systems for contextually augmenting and annotating moving pictures or images with tags using region tracking on computing devices with screen displays, including mobile devices and virtual reality headsets. The present invention enables both content authors and viewers to directly tag and link supplementary content, such as text and video messages, to locations representative of objects in a moving picture or image and share these tags with other authorized users, thereby facilitating messaging.

Abstract: Methods, processes and systems for contextually augmenting and annotating moving pictures or images with tags using region tracking on computing devices with screen displays, including mobile devices and virtual reality headsets. The present invention enables both content authors and viewers to directly tag and link supplementary content to locations representative of objects in a moving picture or image and share these tags with other authorized users.

Abstract: The present invention shows methods and systems for facilitating the distribution, sharing and commentary of electronically published materials such as educational textbooks. The system incorporates a common system for receiving and publishing the documents. Features of the system including layering, iconic mark-up, user notes and comments, user communication and documents/action sharing.

Abstract: Methods and apparatus for the online consumption of content. The use of a markup language to implement unique identifiers in content allows for the measurement and analysis of users' interaction with that content. Online reading aids such as visual masks and density indicators facilitate the users' interaction with that content.