Production string valve with multiseal shuttle

An oilfield production string portion comprising:

• a valve including a shuttle;
• the shuttle including a piston and a lid;
• a piston through hole for providing an oil flow path;
• the piston extending between a piston mouth and a piston exit;
• the piston exit having a converging bore and a diverging circumference;
• to block a first flow through the piston, the lid guided along a piston centerline for mating with the converging bore;
• and,
• to block a second flow around a piston exterior and to isolate debris, the diverging circumference for mating with a valve annular lip and forming a closed pocket therebetween.