Abstract: A ported collar has a tubular body that forms part of or is installed in a tubular that is run into a wellbore, and defines a port for permitting radial fluid communication into or out of the ported collar. A sleeve is movable relative to the port to vary an open area of the port. The activation device includes a fixed key and a traveling key movable relative to the fixed key. The activation device is inserted into the tubular body of the ported collar. A fixed key profile is releasably mated with a tubular body key profile to fix the position of the activation device in the ported collar. A traveling key profile is releasably mated with a sliding sleeve key profile, and the traveling key is moved relative to the fixed key to move the sliding sleeve, and thereby vary the open area of the port.

Abstract: A ported collar has a tubular body that forms part of or is installed in a tubular that is run into a wellbore, and defines a port for permitting radial fluid communication into or out of the ported collar. A sleeve is movable relative to the port to vary an open area of the port. The activation device includes a fixed key and a traveling key movable relative to the fixed key. The activation device is inserted into the tubular body of the ported collar. A fixed key profile is releasably mated with a tubular body key profile to fix the position of the activation device in the ported collar. A traveling key profile is releasably mated with a sliding sleeve key profile, and the traveling key is moved relative to the fixed key to move the sliding sleeve, and thereby vary the open area of the port.

Abstract: A method of lining a wellbore having a tubular string cemented therein includes: running a liner string into the wellbore using a workstring having a liner deployment assembly (LDA) latched to the liner string; hanging the liner string from the tubular string and setting a seal of the liner string against the tubular string; opening a crossover valve of the liner string located below the set seal; and pumping cement slurry through the open crossover valve and down an annulus formed between the liner string and the wellbore.

Abstract: A method of lining a wellbore having a tubular string cemented therein includes: running a liner string into the wellbore using a workstring having a liner deployment assembly (LDA) latched to the liner string; hanging the liner string from the tubular string and setting a seal of the liner string against the tubular string; opening a crossover valve of the liner string located below the set seal; and pumping cement slurry through the open crossover valve and down an annulus formed between the liner string and the wellbore.

Abstract: A method and apparatus for conducting a reverse flow operation. The apparatus may be lowered into a wellbore on a work string, and includes an opening device, a closing device, and a locking device disposed in a housing. Pressurized fluid supplied through the work string may actuate the opening device to open fluid flow through ports in the housing. Pressurized fluid from the annulus may be supplied through the port in the reverse flow direction to actuate the locking device to enable fluid flow up through the work string back to the surface, and to release the closing device. Pressurized fluid supplied through the work string may actuate the closing device to close fluid flow through the ports in the housing.