Patent ID: 8826992
Filing Date: 2014-09-09
Classification: E21B

Abstract:
1. A circulation and rotation tool (CRT) for connection into a drill pipe string comprising: a sub defining a central bore having an axis, the sub having upper and lower ends for connection into a drill pipe string; wherein the sub comprises a unitary upper tubular member and a lower tubular member; wherein the unitary upper tubular member and the lower tubular member are configured to selectively rotate independently and in unison depending on the position of a locking member that is biased to a position that allows for independent rotation; a central bore valve coupled to the unitary upper tubular member to selectively open and close the central bore; and at least one side entry port in a sidewall of the unitary upper tubular member axially below the central valve for selectively allowing drilling fluid to be injected into the central bore.