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A rigless sand-control tool string is for use in a wellbore having plural zones. The tool string includes plural flow port assemblies, and plural screen assemblies connected to corresponding circulation port assemblies. Each set of one of the flow port assemblies and one of the screen assemblies is

A rigless sand-control tool string is for use in a wellbore having plural zones. The tool string includes plural flow port assemblies, and plural screen assemblies connected to corresponding circulation port assemblies. Each set of one of the flow port assemblies and one of the screen assemblies is configured to perform sand control with respect to a corresponding zone of the wellbore. The flow port assemblies are selectively activatable to allow selective performance of sand control with respect to the corresponding zones.

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1. A method of performing sand-control in a wellbore, the method comprising: forming a sand-control tool string comprising multiple pairs of flow port assemblies and screen assemblies, and multiple packers that are settable to define different zones in a wellbore;using a rig comprising a drill strin

1. A method of performing sand-control in a wellbore, the method comprising: forming a sand-control tool string comprising multiple pairs of flow port assemblies and screen assemblies, and multiple packers that are settable to define different zones in a wellbore;using a rig comprising a drill string to run the sand-control tool string into the wellbore;attaching a tubing string to an end of the sand-control tool string;after the sand-control tool string has been run into the wellbore, setting the packers to define the different zones in the wellbore with a first flow port assembly and first sand screen assembly in a first zone and a second flow port assembly and second sand screen assembly in a second zone;moving the rig from the wellsite after setting the packers;after moving the rig, remotely selectively activating the flow port assemblies riglessly without the presence of the rig at the wellsite to perform selective gravel packing with respect to the first zone and the second zone, wherein the gravel packing with respect to the plural zones after setting the packers is performed without the presence of the rig at the wellsite and without moving the first flow port assembly and first screen assembly from the first zone to the second zone and without moving the second flow port assembly and second screen assembly from the second zone to the first zone, and wherein performing gravel packing with respect to the first zone and the second zone includes flowing a gravel slurry from the earth surface of the wellbore through the tubing string and to the corresponding zone through the corresponding activated flow port assembly. 2. The method of claim 1, wherein the gravel packing with respect to the plural zones is performed without deploying a separate tool inside the sand-control tool string for controlling the flow port assemblies. 3. The method of claim 1, wherein at least one of the flow port assemblies comprises a sliding sleeve with a filter layer for controlling flow of fluids through the flow port assembly. 4. The method of claim 1, wherein the remotely selectively activating the flow port assemblies is performed with a control line connected to the flow port assemblies to control opening and closing of flow ports of corresponding flow port assemblies. 5. The method of claim 1, wherein selectively activating the flow port assemblies comprises: activating a first one of the flow port assemblies to open flow ports in the first flow port assembly to enable communication of gravel slurry to a well annulus in a first one of the plural zones;closing the first flow port assembly; andactivating a second one of the flow port assemblies to open flow ports in the second flow port assembly to enable communication of gravel slurry to a well annulus in a second one of the plural zones. 6. The method of claim 1, further comprising after the plural zones have been gravel packed, puncturing an isolation tubing adjacent respective screen assemblies to allow production of fluids from adjacent formations into an inner bore of the sand-control tool string. 7. A method of performing sand-control in a wellbore, the method comprising: using a rig comprising a drill string to run a sand-control tool string into the wellbore, wherein the sand-control tool string comprises a flow port assembly and a packer;attaching a tubing string to an end of the sand-control tool string;after the sand-control tool string has been run into the wellbore, setting a packer to define a zone in the wellbore;moving the rig from the wellsite after setting the packers;after moving the rig, performing gravel packing with respect to the zone without the presence of the rig at the wellsite comprising remotely activating the flow port assembly riglessly and flowing a gravel slurry from the earth surface of the wellbore through the tubing string and to the corresponding zone through the corresponding activated flow port assembly. 8. The method of claim 7, wherein the gravel packing is performed without deploying a separate tool inside the sand-control tool string for controlling the flow port assembly. 9. The method of claim 7, wherein the flow port assemblies comprises a sliding sleeve with a filter layer for controlling flow of fluids through the flow port assembly. 10. The method of claim 7, further comprising after the zone has been gravel packed, puncturing an isolation tubing adjacent a screen assembly to allow production of fluids from adjacent formations into an inner bore of the sand-control tool string. 11. A method of performing sand-control in a wellbore, the method comprising: using a rig to run a sand-control tool string into the wellbore at the end of a tubing string, wherein the sand-control tool string comprises multiple pairs of flow port assemblies and screen assemblies, and multiple packers that are settable to define different zones in a wellbore;after the sand-control tool string has been run into the wellbore, setting the packers to define the different zones in the wellbore with a first flow port assembly and first sand screen assembly in a first zone and a second flow port assembly and second sand screen assembly in a second zone;moving the rig from the wellsite after setting the packers;after moving the rig, performing a sand-control operation with respect to the first zone and the second zone without the presence of the rig at the wellsite comprising activating the flow port assemblies riglessly and flowing a fluid through the tubing string and to the corresponding zone through the corresponding activated flow port assembly. 12. The method of claim 11, wherein the flowing a fluid to a corresponding zone comprises flowing a gravel slurry. 13. The method of claim 11, wherein the flow port assemblies comprises a sliding sleeve with a filter layer for controlling flow of fluids through the flow port assembly. 14. The method of claim 11, further comprising after the zone has been gravel packed, puncturing an isolation tubing adjacent a screen assembly to allow production of fluids from adjacent formations into an inner bore of the sand-control tool string. 15. The method of claim 11, wherein the flow port assemblies each have a sliding sleeve to be actuated by dropping a ball to engage the sliding sleeve to provide a fluid seal against the sliding sleeve and applying fluid pressure to move the sliding sleeve and actuate the flow port assembly. 16. The method of claim 11, wherein the remotely selectively activating the flow port assemblies is performed with a control line connected to the flow port assemblies to control opening and closing of flow ports of corresponding flow port assemblies. 17. The method of claim 11, wherein selectively activating the flow port assemblies comprises: activating a first one of the flow port assemblies to open flow ports in the first flow port assembly to enable communication of gravel slurry to a well annulus in a first one of the plural zones;closing the first flow port assembly; andactivating a second one of the flow port assemblies to open flow ports in the second flow port assembly to enable communication of gravel slurry to a well annulus in a second one of the plural zones. 18. The method of claim 11, wherein the remotely selectively activating the flow port assemblies is performed by deploying a shifting tool to open and close flow ports of corresponding flow port assemblies.