| Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780) |
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| 06/21/2007 | WO2007070150A2 Drill cuttings transfer system and related methods |
| 06/21/2007 | US20070139217 Data relay system for casing mounted sensors, actuators and generators |
| 06/21/2007 | US20070138101 Method of reclaiming brine solutions using an organic chelant |
| 06/20/2007 | EP1797276A1 Sleeve arrangement |
| 06/20/2007 | EP1109609B1 Apparatus for handling waste |
| 06/20/2007 | CN2913593Y Sand-flush proof uniflow valve |
| 06/20/2007 | CN2913583Y Fast sand flushing device |
| 06/20/2007 | CN1985066A Apparatus and method for modified horizontal directional drilling assembly |
| 06/19/2007 | US7231969 Wellbore top drive power systems and methods of use |
| 06/14/2007 | WO2007039038B1 Device for the quantitative analysis of debris |
| 06/14/2007 | WO2007034136A3 Sub-surface deployment valve |
| 06/14/2007 | US20070132605 Casing mounted sensors, actuators and generators |
| 06/14/2007 | US20070131623 Method of reclaiming brine solutions using an organic chelant |
| 06/14/2007 | US20070131455 Nozzle unit and method for excavating a hole in an object |
| 06/14/2007 | US20070131454 Drill cuttings transfer system and related methods |
| 06/13/2007 | EP1795698A2 Tubular filling system |
| 06/13/2007 | CN1981109A Method and apparatus for performing chemical treatments of exposed geological formations |
| 06/13/2007 | CN1979099A Method for measuring high-pressure buffering pot mud-outlet-flow by open channel method |
| 06/12/2007 | US7229950 Treating a hydrocarbon-containing formation with a mixture of aliphatic anionic surfactant and a branched aliphatic nonionic additive to reduce interfacial surface tension between fluids (e.g., water, hydrocarbons) to allow interaction with different hydrocarbons to form an emulsion |
| 06/12/2007 | US7228913 Tubular clamp apparatus for top drives and methods of use |
| 06/12/2007 | US7228897 Cement through side pocket mandrel |
| 06/12/2007 | CA2476081C Thermal process for treating hydrocarbon-contaminated drill cuttings |
| 06/12/2007 | CA2453459C Apparatus and method for drilling with casing |
| 06/12/2007 | CA2315669C Apparatus and method for cleaning debris from wells |
| 06/07/2007 | WO2007064385A1 Polymer hydration method using microemulsions |
| 06/07/2007 | WO2007064218A1 Drill fluid collecting device |
| 06/07/2007 | WO2007062503A1 A mud depression tool and process for drilling |
| 06/07/2007 | US20070125554 Actuating mechanism |
| 06/07/2007 | US20070125553 Circulation tool |
| 06/06/2007 | EP1792050A1 Gas separator |
| 06/06/2007 | EP1792047A1 Casing shoes and methods of reverse-circulation cementing of casing |
| 06/06/2007 | EP1792042A1 Method and apparatus for remediating drill cuttings |
| 06/06/2007 | CN2908777Y One-way back-flushing device with waterflooding packer |
| 06/06/2007 | CN2908766Y Heating device for drilling mud |
| 06/06/2007 | CN1975098A Self-suction low-pressure absorption well sand flushing technology |
| 06/06/2007 | CN1975097A Inner pipe water pressure pulse flushing device |
| 06/05/2007 | US7226203 Fluid mixing system |
| 05/31/2007 | WO2007061364A1 Water collecting device for core drilling device |
| 05/31/2007 | WO2007060449A2 Downhole tool |
| 05/31/2007 | WO2007060294A1 Arrangement for processing dust |
| 05/31/2007 | WO2007060214A2 Method and apparatus for processing and injecting drill cuttings |
| 05/31/2007 | WO2007060211A1 Method and apparatus for vacuum collecting and gravity depositing drill cuttings |
| 05/31/2007 | US20070119628 Method and apparatus for processing and injecting drill cuttings |
| 05/31/2007 | US20070119626 Apparatus and methods for drilling a wellbore using casing |
| 05/31/2007 | US20070119621 Method and device for controlling drilling fluid pressure |
| 05/31/2007 | CA2630916A1 Downhole tool |
| 05/30/2007 | CN2906049Y Self-supplying well cleanout boiler |
| 05/30/2007 | CN2906044Y Throw-in type well-cleanout bottom screen packer |
| 05/30/2007 | CN2906043Y Throw-in type well-cleanout bottom screen packer |
| 05/30/2007 | CN1970990A Method for measuring return flow in petroleum drilling and device therefor |
| 05/30/2007 | CN1318722C Hydraulic drill string accumulator |
| 05/29/2007 | US7222683 Wellbore top drive systems |
| 05/29/2007 | CA2322863C Pressure actuated downhole tool |
| 05/29/2007 | CA2200413C A method of installing the casing in a well and apparatus therefor |
| 05/24/2007 | WO2007057712A2 Apparatus and method for separating solids from a solids laden fluid |
| 05/24/2007 | WO2007057711A2 Apparatus and method for separating solids from a solids laden fluid |
| 05/24/2007 | WO2007057710A2 Apparatus and method for separating solids from a solids laden fluid |
| 05/24/2007 | WO2007057426A2 Device and method for feeding particles into a stream |
| 05/24/2007 | US20070114036 Silicate-Containing Additives for Well Bore Treatments and Associated Methods |
| 05/24/2007 | US20070114031 Completion apparatus and methods for use in hydrocarbon wells |
| 05/24/2007 | US20070114025 Conserving components of fluids |
| 05/24/2007 | CA2711780A1 Apparatus and method for separating solids from a solids laden fluid |
| 05/24/2007 | CA2628757A1 Apparatus and method for separating solids from a solids laden fluid |
| 05/24/2007 | CA2626925A1 Device and method for feeding particles into a stream |
| 05/24/2007 | CA2625633A1 Apparatus and method for separating solids from a solids laden fluid |
| 05/23/2007 | EP1787004A1 Method and apparatus for heating drilling and/or completion fluids entering or leaving a well bore during oil and gas exploration and production |
| 05/23/2007 | CN2903353Y Washing well packer |
| 05/23/2007 | CN2903348Y Inverse sand washing pumping stop prevention apparatus |
| 05/23/2007 | CN2903347Y Electric heating well washing apparatus |
| 05/22/2007 | US7220708 Reducing water permeability of well bore using water soluble (optionally) quaternized (meth)acrylate or (meth)acrylamide copolymers comprising hydrophilic and hydrophobic comonomers |
| 05/22/2007 | US7219735 Immiscible with capping fluid; preventing pollution; kits |
| 05/22/2007 | US7219729 Permanent downhole deployment of optical sensors |
| 05/22/2007 | CA2401184C Improving reservoir communication with a wellbore |
| 05/17/2007 | US20070111902 Methods for Using Reversible Phase Oil-Based Drilling Fluid |
| 05/17/2007 | US20070107909 Apparatus and methods for facilitating the connection of tubulars using a top drive |
| 05/17/2007 | CA2568053A1 Ball-activated mechanism for controlling the operation of a downhole tool |
| 05/16/2007 | EP1784554A1 Method and system for return of drilling fluid |
| 05/16/2007 | CN2900854Y Atomizing pump device special for gas drilling well |
| 05/16/2007 | CN2900765Y Rotary disc driven rotary pressure continuous sand washing device |
| 05/15/2007 | US7216767 Screen basket and shale shakers |
| 05/15/2007 | US7216709 Hydraulic fracturing using non-ionic surfactant gelling agent |
| 05/15/2007 | US7216533 Methods for using a formation tester |
| 05/15/2007 | CA2201038C Sub-assembly for lubricating rock drill bit |
| 05/10/2007 | US20070102154 Mothods of utilizing waste wasters produced by water purification processing |
| 05/09/2007 | EP1019459B1 Oil based drilling fluids suitable for drilling in the presence of acidic gases |
| 05/09/2007 | CN2898267Y Positive sand washer |
| 05/09/2007 | CN1961133A Erosion resistant aperture for a downhole valve or ported flow control tool |
| 05/09/2007 | CN1959061A Technique for parallel processing drilling fluid and zero discharge of drill cuttings |
| 05/08/2007 | US7213660 Washpipe seal |
| 05/08/2007 | US7213656 Apparatus and method for facilitating the connection of tubulars using a top drive |
| 05/08/2007 | US7213645 Methods of improving well bore pressure containment integrity |
| 05/08/2007 | CA2196857C A circulating sub apparatus |
| 05/03/2007 | WO2007032811A8 System and method for processing drilling cuttings during offshore drilling |
| 05/03/2007 | US20070095762 Mixing the brine containing metal impurities with an organic chelant for a time sufficient for the chelant to complex a metal and form a complexed metal precipitate; removing complexed metal precipitate from brine wherein the metal impurities contain iron |
| 05/03/2007 | US20070095573 Pressure controlled downhole operations |
| 05/02/2007 | EP1778813A2 Under-neutralized alkylxylene sulfonic acid composition for enhanced oil recovery processes |
| 05/02/2007 | EP1604093A4 Method and apparatus for drilling a borehole with a borehole liner |
| 05/01/2007 | US7210529 Casing brush tool |
| 04/30/2007 | CA2526998A1 Method of decreasing the disintegration of shale-containing cuttings and drilling fluid therefor |
| 04/26/2007 | WO2007045925A1 Apparatus and method for controlling the viscosity or the density of a drilling fluid |