Abstract: A working string is used to actuate a first valve of a completion string in a well to seal a float shoe of the completion string from a remainder of the completion string. The working string is also used to actuate a second valve of the completion string to seal the center bore of the completion string. Actuating the first valve and the second valve is performed without withdrawing the working string from the well. In certain instances, the working string is a washpipe that includes a shifting profile for each valve.

Abstract: A completion tool for gravel pack and frac pack operations for installing a sump packer and perforating a casing in one trip of a work string. The completion tool is disposed on the end of a work string and includes a perforating gun and a packer attached to the distal end of the completion tool by a coupling. The coupling is such that once the packer is set, the rest of the completion tool can be detached from the packer. After detachment, the completion tool can be repositioned to fire the perforating gun. Positioning of the packer and perforating gun may be accomplished by correlating off of other equipment or by use of logging-while-drilling or measurement-while-drilling equipment incorporated into the completion tool.

Abstract: A working string is used to actuate a first valve of a completion string in a well to seal a float shoe of the completion string from a remainder of the completion string. The working string is also used to actuate a second valve of the completion string to seal the center bore of the completion string. Actuating the first valve and the second valve is performed without withdrawing the working string from the well. In certain instances, the working string is a washpipe that includes a shifting profile for each valve.

Abstract: A method of controlling fluid loss from a wellbore comprises the steps of: installing a completion string including a well screen and a fluid loss control device in the wellbore; then installing a production string in the wellbore; then engaging the production string with the completion string; and then operating the fluid loss control device by varying pressure in a fluid passage. A well system comprises a completion string including a fluid loss control device, a packer and a well screen, the packer being positioned between the fluid loss control device and the screen; and a production string including another packer and engaged with the completion string, the fluid loss control device being positioned longitudinally between the packers, and the fluid loss control device being operable in response to variation of pressure in a fluid passage.