is permitted and the valve 60 is open the member 92 carries three axially spaced apart circumferential seals 94 96 98 externally thereon the upper seal 94 is sealingly received in an upper bore 100 formed internally on the sleeve 80 the lower seals 96 98 are sealingly received in a lower bore 102 formed internally on the sleeve 80 with the seals axially straddling a fluid passage 104 formed radially through the sleeve the fluid passage 104 is in fluid communication with the chamber 66 via an opening 106 formed through the sleeve 80 below the bore 102 however the fluid passage 104 is isolated from fluid communication with the annulus 48 by the seals 96 98 and by a circumferential seal 108 carried externally on the sleeve 80 the seal 108 sealingly engages a bore 110 formed internally on a generally tubular housing 112 radially outwardly surrounding the sleeve 80 the housing 112 is configured for sealing attachment to the tubing 44 or circulating valve 56 the seal 108 and another circumferential seal 114 carried externally on the sleeve 80 axially straddle a fluid passage 116 formed radially through the housing 112 the fluid passage 116 is in fluid communication with one or more circumferentially spaced apart fluid passages 118 only one of which is visible in fig3 a formed radially through the sleeve 80 a series of circumferentially spaced apart fluid passages 120 formed radially through the member 92 an axially extending fluid passage 122 formed in the member and axially spaced apart fluid passages 124 126 formed radially through.