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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11/03/1992 | CA1309707C Drilling process and device for substerranean study and exploration |
11/03/1992 | CA1309652C Subterranean well casing float tool |
10/29/1992 | WO1992018750A1 Seabed gas collection and monitoring device |
10/29/1992 | WO1992016712A3 Masonry coring system |
10/21/1992 | CN2119496U Circulation type filtrate loss instrument for drilling fluid |
10/21/1992 | CN1018749B Method of managing prodn. well |
10/20/1992 | US5156686 Treating with carboxylic acid, conversion to water soluble salt, removing entrained oil in aqueous phase |
10/20/1992 | CA1309085C Diverter apparatus |
10/20/1992 | CA1308897C Acidized fracturing fluids containing high molecular weight poly(vinylamines) for enhanced oil recovery |
10/20/1992 | CA1308896C Compositions containing high molecular weight poly(vinylamines) for enhanced oil recovery |
10/14/1992 | EP0274523B1 Organophilic polyphenolic acid adducts |
10/14/1992 | CN2118811U Treating device for oil field well washing acidifying waste liquid |
10/13/1992 | US5154244 Transmission sleeve for a down hole hammer |
10/13/1992 | US5154078 Kick detection during drilling |
10/11/1992 | CA2065663A1 Suction valve for high pressure slurry pump |
10/06/1992 | US5152554 For connecting to a cylindrical member |
10/01/1992 | WO1992016717A1 Gravel pack well completions with auger-liner |
10/01/1992 | WO1992016712A2 Masonry coring system |
09/30/1992 | CN2117461U Drilling fluid reheological properties monitor |
09/30/1992 | CN2117460U Accumulative throttle water distributor |
09/30/1992 | CN2117459U Magnetic tube magnetizer for drilling mud |
09/30/1992 | CN2117458U Impeller of drilling fluid mill |
09/29/1992 | US5150756 Well completion apparatus |
09/29/1992 | CA1308093C Earth boring apparatus with control valve |
09/23/1992 | CN2116772U Centrifuge arranger for drilling fluid epuration |
09/22/1992 | US5148880 Apparatus for drilling a horizontal controlled borehole in the earth |
09/16/1992 | EP0502938A1 Drilling bit irrigated by a fluid distributed by a fluidic oscillator. |
09/16/1992 | EP0502882A1 Method and apparatus for cleaning drill cuttings |
09/16/1992 | CN2116079U Centrifuge ratary drum for purification of drilling fluids |
09/16/1992 | CN1018271B Multiple functional treatment agent for well drill liquid and its preparing method |
09/09/1992 | EP0502218A1 Apparatus for producing stabilizing mixture |
09/08/1992 | US5145005 Casing shut-in valve system |
09/02/1992 | CN1018076B Drill pipes and castings utilizing multi-conduit tubulars |
09/01/1992 | US5143162 Device for removing debris from a drillhole |
08/25/1992 | US5141051 Electrical wet connect and check valve for a drill string |
08/19/1992 | CN2113335U Ground water distributor for water filling well |
08/18/1992 | US5140527 Method for the determination of the ionic content of drilling mud |
08/18/1992 | US5139096 Pneumatic percussion hammers |
08/18/1992 | US5139095 Method for removing debris from a drillhole |
08/18/1992 | US5139089 Well cleanout tool and method |
08/12/1992 | EP0498128A1 Method for determining fluid influx or loss in drilling from floating rigs |
08/12/1992 | CN2112682U Oil removing contact air float reacting room |
08/05/1992 | EP0496850A1 Drill cuttings disposal method and system. |
08/05/1992 | CN1063331A Heated scrubing valve |
08/04/1992 | US5135053 Treatment of well tubulars with gelatin |
07/29/1992 | EP0496481A2 Soft excavator |
07/25/1992 | WO1992013168A1 Flow pulsing apparatus for drill string |
07/25/1992 | CA2101329A1 Flow pulsing apparatus for drill string |
07/21/1992 | US5132025 Oil well drilling mud and brine recycling system |
07/21/1992 | US5131692 Pipe connector with threaded seal in nonthreaded cavity |
07/21/1992 | CA1305469C Method and apparatus for deepwater drilling |
07/18/1992 | CA2059599A1 Light weight piston |
07/15/1992 | CN2110079U Double-valve leakage apparatus |
07/15/1992 | CN2110078U Dashed deep well pump leakage apparatus |
07/14/1992 | US5130950 Ultrasonic measurement apparatus |
07/14/1992 | US5129469 Drill cuttings disposal method and system |
07/14/1992 | US5129468 Method and apparatus for separating drilling and production fluids |
07/07/1992 | US5128866 Pore pressure prediction method |
07/07/1992 | US5128046 Chelation, coagulation, water pollution control |
07/07/1992 | CA1304674C Device for borehole hydraulic mining |
07/01/1992 | EP0492996A1 Method and apparatus for perforating a well |
07/01/1992 | EP0491841A1 Pore pressure prediction method |
06/30/1992 | US5126051 Enzymatic decomposition of drilling mud |
06/30/1992 | US5125692 Dry pneumatic system for hard rock shaft drilling |
06/30/1992 | US5125464 Drilling device for the study and exploitation of the subsoil |
06/24/1992 | CN2108169U Wellhead filter for water flooding in oil field |
06/24/1992 | CN2108168U Special track drilling fluid shaker |
06/23/1992 | US5123783 Method of reusing slurry |
06/19/1992 | WO1992011486A1 Coupling apparatus |
06/17/1992 | CN1061981A Suspending medium for water soluble polymer |
06/16/1992 | US5121794 Waste fluid containment and recovery apparatus |
06/11/1992 | WO1992009379A1 Plant for treating drill cuttings |
06/10/1992 | EP0489447A1 A method for the esimation of pore pressure within a subterranean formation |
06/09/1992 | US5119891 Adaptor for drilling strings with controllable air passage |
06/03/1992 | EP0488666A1 Mixing method and mixing apparatus |
06/02/1992 | US5117923 Hydraulic jackhammer |
05/29/1992 | WO1992009380A1 Method for treating drill cuttings during oil and gas drilling |
05/26/1992 | US5115875 Hammer drills for making boreholes |
05/26/1992 | US5115871 Method for the estimation of pore pressure within a subterranean formation |
05/20/1992 | EP0486449A1 Drill string component |
05/19/1992 | US5114598 Method of making drilling fluid containing asphaltite in a dispersed state |
05/19/1992 | US5114597 Method of making a drilling fluid containing carbon black in a dispersed state |
05/19/1992 | US5113951 Apparatus for driving a drilling or percussion tool |
05/19/1992 | CA1301147C Apparatus for controlling the operation of a downhole tool |
05/13/1992 | CN2104287U Automatic ration make-up liquid unit in mine |
05/12/1992 | US5111892 Imbalance compensated drill bit with hydrostatic bearing |
05/06/1992 | CN2103632U Double-impeller type drilling liquid stirrer |
05/05/1992 | US5110457 Screening larger particles, separation of remainder in cyclone |
05/05/1992 | US5109934 Mobile drilling rig for closely spaced well centers |
05/05/1992 | US5109933 Drill cuttings disposal method and system |
04/30/1992 | WO1992006802A1 A method of disposing of drilling wastes |
04/30/1992 | CA2094255A1 Method of disposing of drilling wastes |
04/29/1992 | EP0482930A2 Mixing apparatus |
04/29/1992 | EP0482892A1 Apparatus for preventing separation of a down-hole motor from a drill string |
04/28/1992 | US5108226 Technique for disposal of drilling wastes |
04/28/1992 | US5107933 Hydraulic drilling outfit |
04/28/1992 | US5107874 Apparatus for cleaning particulate solids |
04/27/1992 | CA2053683A1 Apparatus for preventing separation of a down-hole motor from a drill string |
04/25/1992 | CA2053845A1 Mixing apparatus |
04/22/1992 | EP0481545A1 Drill head |