Systems and Methods for Controlling Fluid Flow in a Wellbore Using a Switchable Downhole Crossover Tool

A method of controlling fluid circulation in a wellbore intersecting a subterranean earth formation, wherein a tubing string is located in the wellbore and comprises a bore such that an annulus is formed between the tubing string and the wellbore, comprising:

• delivering fluid through the tubing string bore;
• axially moving a body relative to a sleeve on the tubing string in a first direction to close a valve in the bore and divert the fluid above the valve into a channel in fluid communication with a packer assembly;
• expanding the packer assembly with the diverted fluid to create a fluid barrier in the annulus, the barrier dividing the annulus into an upper annulus and a lower annulus;
• moving a piston with the diverted fluid to allow the fluid to flow from the channel to the lower annulus;
• returning the fluid into the tubing string bore from the lower annulus;
• and
• diverting the fluid around the closed valve through another channel to allow the returned fluid to flow from the bore below the closed valve to the upper annulus.

A crossover tool for controlling fluid circulation in a wellbore intersecting a subterranean earth formation, comprising:

• a tool body locatable in the wellbore comprising:
• a bore;
• and
• a valve in the bore;
• a sleeve located in the body configured to control the valve based on the axial position of the sleeve in the tool body;
• a drag block assembly coupled to the sleeve through the body and configured to engage the wellbore and resist axial movement of the sleeve relative to the tool body;
• and
• a packer assembly coupled to the tool body and configured to create a fluid barrier in the wellbore, the barrier dividing the wellbore into an upper annulus and a lower annulus.