Patent ID: 7370698

Claim:
A push plate assembly for attachment to a fill-up and circulation tool for pushing a casing string downward into a well bore during a process of inserting said casing string within said well bore for use on top drive and rotary type drilling rigs, said casing string being comprised of a plurality of casing tubulars for interconnection and insertion into said well bore, said fill-up and circulation tool comprising a tubular member with a flexible seal thereon insertable into said plurality of casing tubulars for sealing contact with an interior of said casing tubulars, the push plate assembly comprising: a top sub portion, with a top and bottom end, the top end connecting to the rig; a coupling connected to said bottom end of the top sub portion; and a rotatable plate radially disposed about said coupling, said rotatable plate capable of being fixedly attached to said coupling, wherein load forces from the rig are transferred through the rotatable plate, when fixedly attached to said coupling, to the casing to push the casing downward into the well bore.