Patent ID: 8443877
Filing Date: 2013-05-21
Classification: E21B

Abstract:
1. A drilling rig with a top drive having an inside blowout preventer for drilling in a wellbore, the drilling rig comprising: (a) a derrick having a crown; (b) a torque track suspended from the crown, wherein a bottom of the torque track is connected with a bottom of the drilling rig; (c) a hook secured to a cable, wherein the cable extends from the hook over at least one sheave mounted to a top of the derrick and is connected with a drawworks; (d) a drawworks motor for turning the drawworks and raising or lowering the hook; (e) a top drive housing connected with a first upper link and a second upper link, wherein the top drive supports a rotatable stem and a grabber leg; (f) the inside blowout preventer connected with the rotatable stem, the inside blowout preventer comprising: (g) a motor connected with the rotatable stem and mounted to the top drive housing; (h) a first lower link and a second lower link each connected with the top drive housing; (i) a torque wrench assembly connected with the top drive housing; and (j) an elevator connected with the first lower link and the second lower link.