A diverter assembly is also available, which allows fluids to bypass the top-drive and the standpipe, thus reducing the head pressure that is created during flow-back operations.

OES offers several options for your casing filling / flow-back requirements.  These options include Top Drive & "Non" Top Drive capabilities.  Additionally, tools provide for "Flow-Back" only applications when utilizing auto fill float equipment and full opening valves as pictured.

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