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An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 8127837 | Sealed well cellar A well cellar system includes a substantially planar base, the base defining an aperture sized to receive a conductor pipe. The well cellar system also includes at least one substantially inflexible side member attached to the base, the at least one side member and ... | 03/06/2012 |
| 8127838 | Stuffing box leak containment apparatus An apparatus for containing leaks from a stuffing box on a wellhead production assembly is provided. The apparatus comprises a containment vessel consisting of two half shells that are joined below the stuffing box. The apparatus further comprises a seal subassembly... | 03/06/2012 |
| 8100174 | Drill fluid collecting device and method of use A drill fluid collecting device, in which a space between a power tong (2) and a backup tong (4) is provided with collecting means, and in which, on their respective sides facing the space, the power tong (2) and the backup tong (4) are p... | 01/24/2012 |
| 8079412 | Method and apparatus for mitigating environmental impact due to fluid leaks Embodiments of the inventive technology may provide a leaked fluid detection and response system in one aspect, and in another aspect, an environmental enclosure for at least a component of such leaked fluid detection system. Various embodiments of the leaked fluid ... | 12/20/2011 |
| 7681633 | Method and apparatus for preventing spillage or loss of drill fluids A well bore fluid recovery system and method is disclosed for recovering a column of well bore fluid within a stand of casing before cutting the casing. The recovery system relates to a system for preventing fluids from being spilled when casing is being finished fo... | 03/23/2010 |
| 7413012 | System and method for collecting escaping hydrocarbons from a breached well pipe A method and system for containing escaping hydrocarbon fluid from a well pipe of a production well. Suppression of the hydrocarbon fluid to a level below the breach location using a control fluid allows the breach to be repaired through the installation of a contai... | 08/19/2008 |
| 7392860 | Stripper rubber on a steel core with an integral sealing gasket An elongated stripper rubber having a converging internal passage extending to a neck portion elastically expanded to snugly receive a drill string. The elongated stripper rubber is adhered to a steel core having a truncated conical load bearing surface containing a... | 07/01/2008 |
| 7373987 | Method and apparatus for preventing spillage or loss of drill fluids A well bore fluid recovery system and method is disclosed for recovering a column of well bore fluid within a stand of casing before cutting the casing. The recovery system relates to a system for preventing fluids from being spilled when casing is being finished fo... | 05/20/2008 |
| 7350597 | Drilling system and method A drilling system for drilling a bore hole into an earth formation, the bore hole having an inside wall. A drill string reaches into the bore hole from a surface, leaving a drilling fluid return passage between the drill string and the bore hole inside wall. A botto... | 04/01/2008 |
| 7325599 | Safety shield for rotary drilling rigs This invention relates to a novel safety shield for rotary drilling rigs. More particularly, the invention pertains to a portable, clam-shell style extendible leg safety shield which can be readily installed on the ground around the drill stem of an operational dril... | 02/05/2008 |
| 7322418 | Continuous circulation drilling method A method for drilling wells in which the tubular can be added or removed from the drill string whilst mud and drilling fluids being circulated continuously and kept separated from the environment to reduce pollution. A connector is used with an inlet and outlet for ... | 01/29/2008 |
| 7306032 | Fluid collecting device An adjustable fluid collecting device with two shells pivotally movable relative to each other wherein the fluid collecting device is movable between an open position in which the shells are distanced from each other and a closed position in which the shells touch, ... | 12/11/2007 |
| 7252151 | Drilling method Methods and apparati are disclosed for continuous circulation of drilling fluids while adding or removing tubulars to and from a drill string, and also for continuing drilling during the addition or removal of tubulars to and from the drill string. ... | 08/07/2007 |
| 7219737 | Subsea wellhead arrangement for hydraulically pumping a well A subsea well pumping system for installing and retrieving a hydraulically actuated down hole pump employed within the tubing suspended within casing extending from above a seabed, the system having a wellhead assembly affixed to the upper end of the casing for supp... | 05/22/2007 |
| 7204304 | Removable surface pack-off device for reverse cementing applications A removable surface pack-off device adapted for use in reverse cementing applications is provided. The device includes a housing adapted to be mounted between the ends of an inner casing and an outer casing at or near the surface of a well and at least one fluid pas... | 04/17/2007 |
| 7188683 | Drilling method A system and method is disclosed for continuously supplying drilling fluid down a bore hole while adding or removing tubulars. ... | 03/13/2007 |
| 7185719 | Dynamic annular pressure control apparatus and method A drilling system for drilling a bore hole into a subterranean earth formation, wherein at least a portion of the mud flow from the primary mud pump is diverted to the mud discharge outlet, thereby creating a backpressure system to readily increase annular pressure.... | 03/06/2007 |
| 7165634 | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 01/23/2007 |
| 7147068 | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 12/12/2006 |
| 7134502 | Method and apparatus for preventing spillage or loss of drill fluids A well bore fluid recovery system and method for recovering a column of well bore fluid within a stand of casing before cutting the casing. The recovery system relates to a system for preventing fluids from being spilled when casing is being finished for a well bore... | 11/14/2006 |
| 7107875 | Methods and apparatus for connecting tubulars while drilling The present invention provides an apparatus that permits sections of tubulars to be connected to or disconnected from a string of pipe during a drilling operation. The apparatus further permits the sections of drill pipe to be rotated and to be axially translated du... | 09/19/2006 |
| 7100697 | Method and apparatus for reforming tubular connections The present invention generally relates to methods and apparatus for connecting tubulars and reforming the connection between the tubulars. In one aspect of the invention, the tubulars are aligned, connected, and then reformed at the connection. In one embodiment, t... | 09/05/2006 |
| 7048050 | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 05/23/2006 |
| 7036610 | Apparatus and method for completing oil and gas wells A method of drilling and completing a wellbore in a geological formation to produce hydrocarbons from a well comprising at least the following four steps: drilling the well with a retrievable drill bit attached to a casing; removing the retrievable drill bit from th... | 05/02/2006 |
| 7028585 | Wrenching tong Apparatus for applying torque to a first tubular relative to a second tubular, the apparatus comprising a first tong for gripping the first tubular and a second tong for gripping the second tubular, wherein the first tong is provided with teeth around a peripheral s... | 04/18/2006 |
| 7028586 | Apparatus and method relating to tongs, continous circulation and to safety slips A tong system includes an upper tong having grips for gripping a tubular and a rotation mechanism to rotate the grips and the tubular. A lower tong also has grips and a rotation mechanism to rotate the grips to provide rotation to a lower tubular, such that the uppe... | 04/18/2006 |
| 6968894 | Coiled tubing injector apparatus A coiled tubing injector apparatus for use in inserting coiled tubing into a well, temporarily suspending the coiled tubing, and removing the coiled tubing from the well is described. The apparatus includes a base with a pair of spaced-apart carriages extending upwa... | 11/29/2005 |
| 6904981 | Dynamic annular pressure control apparatus and method A system and method for controlling formation pressures during drilling of a subterranean formation utilizing a selectively fluid backpressure system in which fluid is pumped down the drilling fluid return system in response to detected borehole pressures. A pressur... | 06/14/2005 |
| 6739397 | Continuous circulation drilling method Methods and apparati are disclosed for continuous circulation of drilling fluids while adding or removing tubulars to and from a drill string, and also for continuing drilling during the addition or removal of tubulars to and from the drill string. ... | 05/25/2004 |
| 6688394 | Drilling methods and apparatus A method for drilling wells in which the tubular (5) can be added or removed from the drill string (17) whilst the drill is rotating with the mud and drilling fluids being circulated continuously and kept separated from the environment to reduce pollution... | 02/10/2004 |
| 6591916 | Drilling method Methods and apparati are disclosed for continuous circulation of drilling fluids while adding or removing tubulars to and from a drill string, and also for continuing drilling during the addition or removal of tubulars to and from the drill string.... | 07/15/2003 |
| 6474418 | Wellbore fluid recovery system and method A wellbore fluid recovery system and method is disclosed for recovering a column of wellbore fluid within a stand of pipe when breaking out joints of a wellbore tubular string. The system comprises a container that can be mounted to seal around the joint.... | 11/05/2002 |
| 6415861 | Wellhead fluid collection system A fluid collection system for connection upon a wellhead. The collection system includes a fluid collection pan having an upwardly open fluid reservoir. The pan is adapted to be connected in-line with a wellhead conduit. The pan has an upwardly convex flo... | 07/09/2002 |
| 6386225 | Modular catch pan for wellheads and a method of use of the same A modular catch pan for wellheads includes a rigid pan body consisting of two detachably coupled sections, the body having a circular opening. A plurality of split annular adaptor collars are provided. Each of the adaptor collars has the same outer diamet... | 05/14/2002 |
| 6315051 | Continuous circulation drilling method A method for drilling wells in which the tubular (5) can be added or removed from the drill string (17) while the drill is rotating with the mud and drilling fluids being circulated continuously and kept separated from the environment to reduce pollution.... | 11/13/2001 |
| 6286593 | Oilwell leak containment apparatus for a completed oilwell An oilwell leak containment apparatus for a completed oilwell includes a body segmented into two or more segments. Each of segment has a non-mating edge and a mating edge. The non-mating edge has an upstanding containment wall. When the segments are coupl... | 09/11/2001 |
| 6119772 | Continuous flow cylinder for maintaining drilling fluid circulation while connecting drill string joints Apparatus and methods are disclosed for maintaining drilling fluid circulation while attaching joints of pipe to a drill string during the operation of drilling a well borehole. A chamber is clamped over a thread joint connecting two joints of drill strin... | 09/19/2000 |
| 5937947 | Method and apparatus for preventing environmental contamination due to fluid leakage from a wellhead A method and apparatus for preventing environmental contamination due to fluid leakage from a wellhead. Firstly, provide an annular ring having a top surface, a bottom surface, an outer edge and a plurality of bolt receiving openings extending between the... | 08/17/1999 |
| 5857518 | Oil well pump leakage accumulator An oil well pump leakage accumulator and bypass apparatus installable around a polish rod, and which apparatus effectively prevents contamination of the environment when the primary stuffing box in the blow out preventer unit fails. An adjustable stuffing... | 01/12/1999 |
| 5775419 | Wellhead leak containment device A device for attachment to a production wellhead of the type having a stuffing box and a rod string protruding from the upper end of the stuffing box, for collecting and retaining a fluid escaping from between the stuffing box and the rod string at the up... | 07/07/1998 |
