Methods for cementing a well using a switchable crossover device

A system for cementing a wellbore, comprising:

• a conveyance;
• a casing segment;
• a switchable crossover tool coupled between the conveyance and a casing segment, the switchable crossover tool comprising:
• a tool body comprising:
• a main tool path separable into an upper tool path and a lower tool path;
• and
• an auxiliary chamber comprising an upper annular port and a lower annular port;
• a flow sleeve located within the auxiliary chamber;
• and
• a hydraulic sleeve located within the main tool path and mechanically coupled to the flow sleeve, wherein the flow sleeve is movable into a reverse circulation position by a plug traveling through the main tool path and movable into a conventional circulation position via pressure within the main tool path acting on the hydraulic sleeve;
• an annular packer located on the outside of the tool body separating an annulus between the switchable crossover tool and the well into an upper annulus and a lower annulus;
• wherein in the conventional circulation position, the conveyance is in fluid communication with the casing segment through a first flow path extending between the upper tool path and the lower tool path, and the lower annulus is in fluid communication with an upper annulus through a second flow path extending between the upper annular port and the lower annular port;
• and
• wherein in the reverse circulation position, the conveyance is in fluid communication with the lower annulus through a third flow path formed between the upper tool path and the lower annular port, and the casing segment is in fluid communication with the upper annulus through a fourth flow path extending between the upper annular port and the lower tool path.

A method of cementing a casing in a wellbore having a wall, comprising:

• setting a packer in an annulus between a cross-over tool and the wellbore wall, wherein the packer separates the annulus into a lower annulus and an upper annulus;
• placing a plug within a main flow path of the cross-over tool, separating the main tool path into an upper tool path and a lower tool path;
• moving a flow sleeve of the cross-over tool in a first axial direction into a conventional circulation position, creating a first flow path between the upper tool path and the lower tool path and creating a second flow path between the lower annulus and the upper annulus;
• moving a hydraulic sleeve located within the main flow path in the first axial direction, wherein the hydraulic sleeve is mechanically coupled to the flow sleeve;
• and
• moving the flow sleeve into the reverse circulation position via a dart traveling through the main tool path in the first axial direction, the dart pushing the flow sleeve via a flow sleeve shoulder, creating a third flow path between the upper tool path and the lower tool path, and creating a fourth flow path between the lower annulus and the upper annulus.