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| Number | Title | Issue Date |
| 7451822 | Method for retrieving riser for storm evacuation A method for preparing to move a floating structure away from a wellbore drilled below the bottom of a body of water includes filling a riser extending from the bottom of the body of water to the floating structure with water. The water in the riser is displaced to ... | 11/18/2008 |
| 7267184 | Modular housing for a rotary steerable tool According to one embodiment of the invention, a rotary steerable tool includes a drive shaft configured to be coupled to a drill string at an upper end thereof and configured to be coupled to a drilling tool at a lower end thereof. A middle portion of the drive shaf... | 09/11/2007 |
| 7096979 | Continuous on-bottom directional drilling method and system A method of and system for directional drilling alternate between rotary drilling and sliding drilling with the bit remaining in continuous contact with the bottom of the bore hole. ... | 08/29/2006 |
| 7059427 | Automatic drilling system An automatic drilling system is disclosed which includes an electric servo motor operatively coupled to a winch brake control, a servo controller operatively coupled to the servo motor, and a drum position encoder rotationally coupled to a winch drum. The controller... | 06/13/2006 |
| 6892812 | Automated method and system for determining the state of well operations and performing process evaluation An automated method and system for determining the state of a drilling or other suitable well operations includes storing a plurality of states for the well operation. Mechanical and hydraulic data is received for the well operation. Based on the mechanical and hydr... | 05/17/2005 |
| 6857484 | Steering tool power generating system and method According to one embodiment of the invention, a system for power generation inside a steering tool includes a drive system having a drive shaft disposed within a wall of the steering tool, a rotating shaft rotatably coupled to a non-rotating sleeve of the steering t... | 02/22/2005 |
| 6845826 | Saver sub for a steering tool According to one embodiment of the invention, a saver sub for a steering tool includes a main body having an external thread portion adapted to threadably couple to a box end of the steering tool and an internal thread portion adapted to threadably couple a drill bi... | 01/25/2005 |
| 6820702 | Automated method and system for recognizing well control events An automated method and system for recognizing a well control event includes determining a state of drilling operations. When drilling operations are in a circulating state, a benchmark for a relative flow value. The relative flow value is based on a flow of drillin... | 11/23/2004 |
| 6382331 | Method of and system for optimizing rate of penetration based upon control variable correlation A method of and system for optimizing bit rate of penetration while drilling substantially continuously determine an optimum control variable value necessary to achieve an optimum bit rate of penetration based upon measured conditions and maintains contro... | 05/07/2002 |
| 6233498 | Method of and system for increasing drilling efficiency A method of and system for increasing the efficiency of drillers in performing drilling operations measures performance parameters of drilling events performed by drillers, stores measurements of the performance parameters in a database, and displays a me... | 05/15/2001 |
| 6192998 | Method of and system for optimizing rate of penetration in drilling operations A method of and system for optimizing bit rate of penetration while drilling substantially continuously determine an optimum weight on bit necessary to achieve an optimum bit rate of penetration based upon measured conditions and maintains weight on bit a... | 02/27/2001 |
