Flowback sub for aicds and daicds

A flowback sub system, comprising:

• a tubular body portion having a central bore;
• a check valve disposed along a flow path between an exterior of the tubular body portion and the central bore;
• a secondary flow device disposed along a second flow path;
• a multi-position sleeve disposed within the central bore and configured to move axially between a closed position, a first position and a second position, wherein the multi-position sleeve includes a sleeve opening extending through the multi-position sleeve, wherein the sleeve opening is positioned to block fluid flow between the central bore and the flow path in the closed position, wherein the sleeve opening is axially aligned with the check valve in the first position to allow fluid flow through the check valve, and wherein the sleeve opening is axially aligned with the secondary flow device in the second position to allow fluid flow through the secondary flow device;
• a shearable member configured to hold the multi-position sleeve in the closed position, wherein the shearable member is configured to shear in response to a first threshold pressure;
• a biasing mechanism configured to drive the multi-position sleeve in a first axial direction;
• and
• a retention assembly configured to hold the multi-position sleeve in the first position in response to the biasing mechanism driving the multi-position sleeve from the closed position to the first position, wherein the retention assembly is configured to release the multi-position sleeve in response to a second threshold pressure, and wherein the biasing mechanism is configured to drive the multi-position sleeve in the first axial direction from the first position to the second position in response to the retention assembly releasing the multi-position sleeve.

A flowback sub system, comprising:

• a tubular body portion having a central bore;
• a production only check valve disposed along a flow path between an exterior of the tubular body portion and the central bore, wherein the production only check valve is configured to allow fluid flow from the exterior of the tubular body portion toward the central bore and block fluid flow from the central bore toward the exterior of the tubular body portion;
• an injection only check valve disposed along the flow path between the exterior of the tubular body portion and the central bore, wherein the injection only check valve is configured to block fluid flow from the exterior of the tubular body portion toward the central bore and allow fluid flow from the central bore toward the exterior of the tubular body portion;
• a multi-position sleeve disposed within the central bore, wherein the multi-position sleeve includes a sleeve opening extending through the multi-position sleeve, wherein the multi-position sleeve is configured to move axially between a closed position, a first position, and a second position, wherein the sleeve opening is positioned to block fluid flow between the central bore and both the production only check valve and the injection only check valve in the closed position, wherein the sleeve opening is aligned with the production only check valve in the first position to allow fluid flow between the production only check valve and the central bore, and wherein the sleeve opening is aligned with the injection only check valve in the second position to allow fluid flow between the injection only check valve and the central bore;
• a shear pin configured to hold the multi-position sleeve in the closed position, wherein the shear pin is configured to shear in response to a first threshold pressure;
• a spring configured to drive the multi-position sleeve in a first axial direction;
• and
• a spring loaded shear pin configured to engage a pin recess formed in the multi-position sleeve in the first position, wherein the spring is configured to drive the multi-position sleeve in the first axial direction to the first position, and wherein the spring loaded shear pin is configured to shear in response to a second threshold pressure, and wherein the spring is configured to drive the multi-position sleeve in the first axial direction to the second position in response to the spring loaded pin shearing.