Page 311 - Petroleum and Gas Field Processing

Figure 3 Vapor–solid equilibrium constants for isobutane (Ki). (From Ref. 3.)

12.3.1 Temperature/Pressure Control
Methods recommended for temperature control of natural gas streams
include the following:
1. Downhole regulators or chokes. In this method, a pressure
regulator (choke) is installed downhole (in the well). This causes
the largest portion of the desired pressure drop from the bottom-
hole flowing pressure to the surface flow line pressure to occur
where the gas temperature is still high. The bottom-hole
temperature will be sufficiently high to prevent hydrate
formation as the pressure is reduced. At the surface, little or

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