Patent ID: 6848502

Claim:
A Bishop Process heat exchanger comprising: at least one elongate inner conduit, at least a portion of which is formed from cryogenically compatible materials; an outer conduit surrounding at least a portion of the inner conduit, the outer conduit formed from non-cryogenically compatible materials; a plurality of positioners mounted inside the outer conduit to position the inner conduit generally in a coaxial relationship with the outer conduit to define a generally annular passageway for a warmant; a warmant pump system to circulate warmant through the annular passageway between the inner conduit and the outer conduit, the warmant selected from the group consisting of seawater, fresh water, and warmants from industrial processes; a high pressure pumping system to raise the pressure of a LNG in excess of 1200 psig to convert it to a dense phase natural gas (DPNG) and to move the DPNG through the inner conduit; the inner conduit formed from a material that is strong enough to withstand the pressures of the DPNG from the high pressure pumping system; the heat exchanger having a Froude Number in excess of 10 during operation; and a flexible joint at an end of the inner conduit to facilitate connection of the cryogenically compatible inner conduit with a non cryogenically compatible inner conduit with a non-cryogenically compatible downstream piping system.