Patents
Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780)
11/1992
11/03/1992CA1309707C Drilling process and device for substerranean study and exploration
11/03/1992CA1309652C Subterranean well casing float tool
10/1992
10/29/1992WO1992018750A1 Seabed gas collection and monitoring device
10/29/1992WO1992016712A3 Masonry coring system
10/21/1992CN2119496U Circulation type filtrate loss instrument for drilling fluid
10/21/1992CN1018749B Method of managing prodn. well
10/20/1992US5156686 Treating with carboxylic acid, conversion to water soluble salt, removing entrained oil in aqueous phase
10/20/1992CA1309085C Diverter apparatus
10/20/1992CA1308897C Acidized fracturing fluids containing high molecular weight poly(vinylamines) for enhanced oil recovery
10/20/1992CA1308896C Compositions containing high molecular weight poly(vinylamines) for enhanced oil recovery
10/14/1992EP0274523B1 Organophilic polyphenolic acid adducts
10/14/1992CN2118811U Treating device for oil field well washing acidifying waste liquid
10/13/1992US5154244 Transmission sleeve for a down hole hammer
10/13/1992US5154078 Kick detection during drilling
10/11/1992CA2065663A1 Suction valve for high pressure slurry pump
10/06/1992US5152554 For connecting to a cylindrical member
10/01/1992WO1992016717A1 Gravel pack well completions with auger-liner
10/01/1992WO1992016712A2 Masonry coring system
09/1992
09/30/1992CN2117461U Drilling fluid reheological properties monitor
09/30/1992CN2117460U Accumulative throttle water distributor
09/30/1992CN2117459U Magnetic tube magnetizer for drilling mud
09/30/1992CN2117458U Impeller of drilling fluid mill
09/29/1992US5150756 Well completion apparatus
09/29/1992CA1308093C Earth boring apparatus with control valve
09/23/1992CN2116772U Centrifuge arranger for drilling fluid epuration
09/22/1992US5148880 Apparatus for drilling a horizontal controlled borehole in the earth
09/16/1992EP0502938A1 Drilling bit irrigated by a fluid distributed by a fluidic oscillator.
09/16/1992EP0502882A1 Method and apparatus for cleaning drill cuttings
09/16/1992CN2116079U Centrifuge ratary drum for purification of drilling fluids
09/16/1992CN1018271B Multiple functional treatment agent for well drill liquid and its preparing method
09/09/1992EP0502218A1 Apparatus for producing stabilizing mixture
09/08/1992US5145005 Casing shut-in valve system
09/02/1992CN1018076B Drill pipes and castings utilizing multi-conduit tubulars
09/01/1992US5143162 Device for removing debris from a drillhole
08/1992
08/25/1992US5141051 Electrical wet connect and check valve for a drill string
08/19/1992CN2113335U Ground water distributor for water filling well
08/18/1992US5140527 Method for the determination of the ionic content of drilling mud
08/18/1992US5139096 Pneumatic percussion hammers
08/18/1992US5139095 Method for removing debris from a drillhole
08/18/1992US5139089 Well cleanout tool and method
08/12/1992EP0498128A1 Method for determining fluid influx or loss in drilling from floating rigs
08/12/1992CN2112682U Oil removing contact air float reacting room
08/05/1992EP0496850A1 Drill cuttings disposal method and system.
08/05/1992CN1063331A Heated scrubing valve
08/04/1992US5135053 Treatment of well tubulars with gelatin
07/1992
07/29/1992EP0496481A2 Soft excavator
07/25/1992WO1992013168A1 Flow pulsing apparatus for drill string
07/25/1992CA2101329A1 Flow pulsing apparatus for drill string
07/21/1992US5132025 Oil well drilling mud and brine recycling system
07/21/1992US5131692 Pipe connector with threaded seal in nonthreaded cavity
07/21/1992CA1305469C Method and apparatus for deepwater drilling
07/18/1992CA2059599A1 Light weight piston
07/15/1992CN2110079U Double-valve leakage apparatus
07/15/1992CN2110078U Dashed deep well pump leakage apparatus
07/14/1992US5130950 Ultrasonic measurement apparatus
07/14/1992US5129469 Drill cuttings disposal method and system
07/14/1992US5129468 Method and apparatus for separating drilling and production fluids
07/07/1992US5128866 Pore pressure prediction method
07/07/1992US5128046 Chelation, coagulation, water pollution control
07/07/1992CA1304674C Device for borehole hydraulic mining
07/01/1992EP0492996A1 Method and apparatus for perforating a well
07/01/1992EP0491841A1 Pore pressure prediction method
06/1992
06/30/1992US5126051 Enzymatic decomposition of drilling mud
06/30/1992US5125692 Dry pneumatic system for hard rock shaft drilling
06/30/1992US5125464 Drilling device for the study and exploitation of the subsoil
06/24/1992CN2108169U Wellhead filter for water flooding in oil field
06/24/1992CN2108168U Special track drilling fluid shaker
06/23/1992US5123783 Method of reusing slurry
06/19/1992WO1992011486A1 Coupling apparatus
06/17/1992CN1061981A Suspending medium for water soluble polymer
06/16/1992US5121794 Waste fluid containment and recovery apparatus
06/11/1992WO1992009379A1 Plant for treating drill cuttings
06/10/1992EP0489447A1 A method for the esimation of pore pressure within a subterranean formation
06/09/1992US5119891 Adaptor for drilling strings with controllable air passage
06/03/1992EP0488666A1 Mixing method and mixing apparatus
06/02/1992US5117923 Hydraulic jackhammer
05/1992
05/29/1992WO1992009380A1 Method for treating drill cuttings during oil and gas drilling
05/26/1992US5115875 Hammer drills for making boreholes
05/26/1992US5115871 Method for the estimation of pore pressure within a subterranean formation
05/20/1992EP0486449A1 Drill string component
05/19/1992US5114598 Method of making drilling fluid containing asphaltite in a dispersed state
05/19/1992US5114597 Method of making a drilling fluid containing carbon black in a dispersed state
05/19/1992US5113951 Apparatus for driving a drilling or percussion tool
05/19/1992CA1301147C Apparatus for controlling the operation of a downhole tool
05/13/1992CN2104287U Automatic ration make-up liquid unit in mine
05/12/1992US5111892 Imbalance compensated drill bit with hydrostatic bearing
05/06/1992CN2103632U Double-impeller type drilling liquid stirrer
05/05/1992US5110457 Screening larger particles, separation of remainder in cyclone
05/05/1992US5109934 Mobile drilling rig for closely spaced well centers
05/05/1992US5109933 Drill cuttings disposal method and system
04/1992
04/30/1992WO1992006802A1 A method of disposing of drilling wastes
04/30/1992CA2094255A1 Method of disposing of drilling wastes
04/29/1992EP0482930A2 Mixing apparatus
04/29/1992EP0482892A1 Apparatus for preventing separation of a down-hole motor from a drill string
04/28/1992US5108226 Technique for disposal of drilling wastes
04/28/1992US5107933 Hydraulic drilling outfit
04/28/1992US5107874 Apparatus for cleaning particulate solids
04/27/1992CA2053683A1 Apparatus for preventing separation of a down-hole motor from a drill string
04/25/1992CA2053845A1 Mixing apparatus
04/22/1992EP0481545A1 Drill head