Patent ID: 8739774

Claim:
A solar collection system, comprising: an inlet manifold coupled to a source of water; an outlet manifold; a plurality of receiver sections connected between the inlet manifold and the outlet manifold, with individual receiver sections including: a receiver having an elongated conduit, the elongated conduit having a cleaning pig launch location and a cleaning pig capture location, the elongated conduit having a uniform inner diameter, no hoses, and no expansion joints between the launch location and the capture location to permit passage of a cleaning pig; and at least one reflector positioned to receive solar radiation and direct at least a portion of the radiation to the receiver between the launch location and the capture location; a steam distribution system coupled between the outlet manifold and an oilfield steam injection well to direct steam from the water into the well, without a reboiler between the outlet manifold and the injection well; and a controller coupled to the inlet manifold, the outlet manifold and the receiver sections, the controller being configured to (a) isolate a particular receiver section from other receiver sections and (b) position a reflector corresponding to the particular section off-sun, during cleaning operations.