Patent ID: 9677351
Date: 2017-06-13
CPC Classifications: E21B

Claim:
1. An anchor assembly for anchoring a casing string, operationally attached to a cement head positioned above a rig floor, against upward movement out of a wellbore comprising: a) an anchor sleeve having a central through bore; b) a mandrel member operationally attached to said cement head and having a central through bore, wherein said mandrel member is rotatably disposed within said central through bore of said anchor sleeve, and wherein said mandrel member and anchor sleeve are positioned above said rig floor and out of said wellbore; c) a friction reducing material disposed between said anchor sleeve and said mandrel member; and d) an anchor line having a first and a second end, wherein said first end is attached to said to said anchor sleeve and said second end is attached to a drilling rig, and said anchor line restricts said cement head and casing string from upward movement out of said wellbore.