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| Number | Title | Issue Date |
| 8127866 | Air injection collar The present invention is an air injection collar for use in the drilling industry that is used to reduce the weight of the column of returning drilling mud and debris without causing unnecessary frictional wear on the drill pipe. The invention is a unique sleeve tha... | 03/06/2012 |
| 7516803 | Air injection collar The present invention is an air injection collar for use in the drilling industry that is used to reduce the weight of the column of returning drilling mud and debris without causing unnecessary frictional wear on the drill pipe. The invention is a unique sleeve tha... | 04/14/2009 |
| 7325629 | Method and system for processing oil and gas well cuttings utilizing existing slurry processing equipment A method for integrating a batch cement process with a cuttings reinjection process, the method comprising: equipping a batch cement skid with a particle classifier and a grinding pump, such that the batch cement skid sequentially implements the cuttings reinjection... | 02/05/2008 |
| 7299866 | Apparatus and method for cleaning out sand from an underbalanced hydrocarbon producing well An apparatus and method is used in the cleaning out of sand in underbalanced gas wells. The present invention includes a valve subassembly equipped with an emergency shutin device to remotely control the actuation of the valve via an air or hydraulic control line. O... | 11/27/2007 |
| 7111695 | Pneumatic rock-boring device and method for horizontal drilling using compressed air and drilling medium The invention relates to a method for horizontal ground drilling, in particular for rock drilling, by means of a ground drilling apparatus which can be driven forward in rotation and percussively, the apparatus having compressed air and drilling medium applied to it... | 09/26/2006 |
| 7093662 | System for drilling oil and gas wells using a concentric drill string to deliver a dual density mud A system for controlling drilling mud density at a location either at the seabed (or just above the seabed) or alternatively below the seabed of wells in offshore and land-based drilling applications is disclosed. The present invention combines a base fluid of lesse... | 08/22/2006 |
| 7090018 | Reverse circulation clean out system for low pressure gas wells The present invention provides an apparatus and a method for removing undesirable material from a well bore in a hydrocarbon formation with minimum damage to the formation. The apparatus comprises a concentric tubing string, said concentric tubing string further com... | 08/15/2006 |
| 7059426 | Acoustic flow pulsing apparatus and method for drill string An underground drilling method and apparatus generates intense pressure pulses at a location at the surface. The pressure pulses propagate down through a drill string to a drill bit. The pulses may be generated by creating water hammer in flowing drilling mud. Inten... | 06/13/2006 |
| 7025154 | Method and system for circulating fluid in a well system A method for circulating drilling fluid in a well system includes drilling a substantially vertical well bore from a surface to a subterranean zone and drilling an articulated well bore from the surface to the subterranean zone. The articulated well bore is horizont... | 04/11/2006 |
| 6945339 | Core drill A plurality of chip evacuating grooves (16, 26, 36, 46a, 46b) in a vertical direction in parallel with a rotational axis of a core main body (14) are formed at an outer peripheral face of the core main body (14) in a circumf... | 09/20/2005 |
| 6588501 | Method and apparatus to reduce hydrostatic pressure in sub sea risers using buoyant spheres A pumping system for injecting buoyant spheres into an oil or gas well having a feeder containing a plurality of buoyant spheres; and a sphere pump in proximity to the feeder, having first and second rotatable wheels, wherein the first wheel has a plurali... | 07/08/2003 |
| 6347675 | Coiled tubing drilling with supercritical carbon dioxide A method for increasing the efficiency of drilling operations by using a drilling fluid material that exists as supercritical fluid or a dense gas at temperature and pressure conditions existing at a drill site. The material can be used to reduce mechanic... | 02/19/2002 |
| 6032747 | Water-based drilling fluid deacidification process and apparatus A method and an apparatus is provided for use in an underbalanced drilling process using exhaust gases wherein some constituents of the exhaust gas combine with water to form acids. The present invention provides a means of deacidifying drilling fluids. T... | 03/07/2000 |
| 5950736 | Method and apparatus for improving drilling efficiency by application of a traveling wave to drilling fluid A drilling apparatus includes a drill string, a drilling head located at a first end of the drill string, a drilling fluid pump located at a second end of the drill string, wherein the drilling fluid pump pumps a drilling fluid along the length of the dri... | 09/14/1999 |
| 5865261 | Balanced or underbalanced drilling method and apparatus A casing or tubing segment or segments are disclosed which can be used to create a parasite annulus during drilling. The cased wellbore receives a string containing valves and the drillstring operates through it. As the mud circulates, the segments of the... | 02/02/1999 |
| 5427190 | Underground borer with down hammer In an underground borer with down hammer having a vehicle body 1, a guide stilt 2 standing on the vehicle body, and a rotary machine 4 having its bottom coupled with a screw shaft 3 and a down hammer B, a supply unit 5 is interposed between the rotary mac... | 06/27/1995 |
| 5330017 | Method of processing drilling mud in earth-boring operations A method and associated apparatus are provided for processing the drilling mud used to flush cuttings from the bore hole while maintaining control of bore hole pressure. Air is injected into the lower regions of drilling mud in the working pits to agitate... | 07/19/1994 |
| 4474252 | Method and apparatus for drilling generally horizontal bores Means are provided to drill generally horizontal bores through heterogeneous fill and hard strata. A carriage providing power means to rotate a spindle is mounted on a generally horizontal track and is adapted to move longitudinally along the track. Swive... | 10/02/1984 |
| 4194567 | Method and apparatus for balancing pressures in an oil well The invention relates to the balancing of the pressures in drilled strata, the pressures being lower than that of the liquid columns contained in the entire well. The hydrostatic level of fluid, e.g. a liquid, in the bottom of the well is selected to obta... | 03/25/1980 |
| 3958650 | Drilling system using weight of mud A drill system for drilling very large holes in the earth, of diameters up to from 10 to 20 feet, by means of a rotary bit carrying a plurality of cutters, wherein the bit assembly is pressed against the bottom of the hole, so that the unit pressure again... | 05/25/1976 |
