o rings referring to fig6 due to the pressure that is exerted on the valve sleeve 60 the assembly that is formed from the valve sleeve 60 collet sleeve 30 mandrel 40 and sleeve 48 travels downwardly until the bottom surface of the collet sleeve 30 and the bottom surface of the sleeve 48 reside on an annular shoulder that is formed at the bottom of the annular pocket 80 fig6 also depicts a sphere or ball 150 that rests on the seat 94 and has caused the valve 14 to transition to its open state referring back to fig5 in the open state of the valve 14 the passageway 70 is in fluid communication with the central passageway 24 this is in contrast to the closed state of the valve in which the o ring 68 forms a seal between the central passageway 24 and the passageway 70 as depicted in fig2 and 4 therefore in the valve 39 s open state fluid pressure may be communicated to the passageway 70 see fig5 for purposes of transitioning another valve 14 of the string 12 see fig1 to its ball catching state as a more specific example in some embodiments of the invention the passageway 70 may be in fluid communication with the passageway 42 of another valve 14 the immediately adjacent valve 14 above for example therefore in response to the valve sleeve 60 moving to its lower position a downward force is applied through the communication of pressure through the passageways 70 and 42 to the mandrel 40 of another valve 14 of the string 12 as a more specific example in some embodiments of the invention the passageway 70 of each valve 14 may be in fluid communication with the passageway 42.