Patents for E21B 41 - Equipment or details not covered by groups (7,984) |
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07/23/1991 | US5034929 Means for varying MWD tool operating modes from the surface |
07/23/1991 | US5033545 Conduit of well cleaning and pumping device and method of use thereof |
07/23/1991 | CA1286601C Wellbore cleanout apparatus and method |
07/20/1991 | WO1991011270A1 Cleaning device |
07/20/1991 | CA2074247A1 Cleaning device |
07/16/1991 | US5032042 Method and apparatus for eliminating non-naturally occurring subsurface, liquid toxic contaminants from soil |
07/03/1991 | EP0435430A1 Method of and apparatus for protecting downhole equipment |
07/02/1991 | CA1285472C Method and system for maintenance and servicing of subsea wells |
07/02/1991 | CA1285471C Well testing apparatus and methods |
06/30/1991 | CA2027967A1 Method of and apparatus for protecting downhole equipment |
06/26/1991 | EP0292508B1 Corrosion inhibiting composition for zinc halide-based clear, high density fluids |
06/25/1991 | US5026219 Portable wellhead and welder protector system |
06/23/1991 | CA2032055A1 Oil tool and method for controlling paraffin deposits in flow lines and downhole strings |
06/19/1991 | EP0432787A1 Process for removing water soluble organic compounds from produced water |
06/18/1991 | US5024271 Permanent-magnet wax-proof device |
06/13/1991 | WO1991008376A1 Method for plugging well walls |
06/13/1991 | WO1991008275A1 Process for recovery and treatment of a diverse waste stream |
06/13/1991 | WO1991008274A1 Process for recovery and treatment of hazardous and non-hazardous components from a waste stream |
06/12/1991 | CN1052151A 17 alkenyl imidazoline corrosion inhibitor for oil field |
06/11/1991 | US5022787 Method of returning geothermal gases to the underground |
06/04/1991 | US5020595 Carbon dioxide-steam co-injection tertiary oil recovery process |
05/30/1991 | WO1991007616A1 A hose and cable conveyor |
05/30/1991 | WO1991007569A1 Method for finishing a well |
05/22/1991 | CN1051607A Method of well completion |
05/16/1991 | DE3844689C2 Cleaning contaminated ground in successive vertical operations |
05/15/1991 | EP0427371A1 Method of well completion |
05/14/1991 | US5014780 Long distance section mill for pipe in a borehole |
05/08/1991 | EP0426477A2 Burner nozzle |
05/08/1991 | EP0426123A2 Module to deal with, extend and repair undersea lines, worked by remotely operated vehicle |
05/07/1991 | US5012868 Corrosion inhibition method and apparatus for downhole electrical heating in mineral fluid wells |
05/07/1991 | CA1283849C Downhole gaseous liquid flow agitator |
05/02/1991 | CA2028967A1 Burner nozzle |
04/30/1991 | US5010966 Drilling method |
04/16/1991 | US5008664 Apparatus for inductively coupling signals between a downhole sensor and the surface |
04/16/1991 | US5007769 Method and device for attaching a removable guide post |
04/09/1991 | US5005650 Multi-purpose well head equipment |
04/02/1991 | US5004051 Method and means for cleansing and storing drill cuttings from drilling operations in the sea bottom |
03/26/1991 | US5002129 Suitable for sub-sea oil or gas installation |
03/21/1991 | WO1991003280A1 Apparatus for removing volatile contaminants from soil |
03/19/1991 | US5000649 Electromechanical manipulator assembly |
03/19/1991 | CA1281807C Method and device of positioning an element using ultrasound sensors |
03/19/1991 | CA1281637C Apparatus for dispensing chemicals into oil and gas wells |
03/13/1991 | EP0417009A1 Device and installation for the cleaning of drains especially in an oil production well |
02/26/1991 | US4995460 Method and apparatus for disposing of water at gas wells |
02/07/1991 | WO1991001481A1 Monitoring and control of oil/gas fields |
02/05/1991 | US4990233 Method for retarding mineral buildup in downhole pumps |
02/05/1991 | US4989522 Separation, combustion using plasma arc |
02/02/1991 | CA2016265A1 Means for varying mwd tool operating modes from the surface |
01/23/1991 | EP0409446A1 Tool actuator |
01/22/1991 | US4986301 Sub-sea valve actuator |
01/22/1991 | CA1279259C Load carrying and hydraulic fluid transmission connecting device |
01/16/1991 | EP0290486B1 Corrosion inhibitors for clear, calcium-free high density fluids |
01/15/1991 | CA1279003C Method and an apparatus for maintenance of valves included in subsea production system for oil and gas |
01/15/1991 | CA1279002C Retracting, aligning, and fixing device |
01/12/1991 | CA2018146A1 Carbon dioxide-steam co-injection tertiary oil recovery process |
01/11/1991 | CA2010864A1 Down-hole liquid detecting apparatus |
12/12/1990 | CN2067317U Multipurpose wellhead assembly for cold-transportation ball technology |
12/12/1990 | CN2067316U Rubber crawler workover equipment |
12/11/1990 | CA1277592C Method and system for attaching and removing equipment from a wellhead |
12/11/1990 | CA1277590C Disposal of produced formation fines during oil recovery |
12/05/1990 | EP0401119A1 Method for characterising a primary layer |
12/05/1990 | EP0400137A1 Dual wall well development tool |
12/04/1990 | US4974996 Process and device for the precision positioning of bodies on fixed structures under high depth waters |
12/04/1990 | US4974673 System for the production of crude oil by the injection of treatment fluids |
11/27/1990 | US4973194 Method for burial and isolation of waste sludge |
11/27/1990 | CA1276874C Subsurface device actuators |
11/22/1990 | EP0397772A1 Subsea support arrangement |
11/22/1990 | EP0397771A1 Clamped body replacement tool |
11/20/1990 | US4971160 Perforating and testing apparatus including a microprocessor implemented control system responsive to an output from an inductive coupler or other input stimulus |
11/20/1990 | CA1276624C Devices for drilling branched wells |
11/06/1990 | US4967841 Horizontal well circulation tool |
11/06/1990 | CA1275959C Method and apparatus for treating oil-water-solids sludges and refinery waste streams |
10/31/1990 | CN2064821U Long fluke hydraulic anchor |
10/23/1990 | US4964468 Emulsificaiton |
10/18/1990 | WO1990010139A3 Undersea package and installation system |
10/10/1990 | EP0391885A1 Method of disposing of waste material |
10/03/1990 | EP0309445B1 A securing device |
09/26/1990 | EP0388438A1 Measurement of corrosion with curved ultrasonic transducer; rule-based processing of full echo waveforms; preprocessing and transmitting echo waveform information |
09/25/1990 | US4958683 Method and apparatus for treating wells |
09/25/1990 | CA1274379A1 Corrosion inhibitor for well acidizing treatments |
09/20/1990 | WO1990010778A1 A device for operations under water |
09/19/1990 | EP0387852A1 Corrosion inhibition apparatus for downhole electrical heating |
09/19/1990 | EP0387851A1 Corrosion inhibition method and apparatus for downhole electrical heating in mineral fluid wells |
09/19/1990 | EP0387846A1 Power sources for downhole electrical heating |
09/19/1990 | CN1045447A Sub-sea valve actuator |
09/18/1990 | US4957640 Corrosion prevention with compositions prepared from organic fatty amines and nitrogen-containing aromatic heterocyclic compounds |
09/12/1990 | EP0387205A2 Sub-sea valve assembly |
09/04/1990 | CA1273563A1 Method and device for detecting a fluid flow |
08/31/1990 | CA2009114A1 Process and apparatus for recovering reusable water from waste drilling fluid |
08/29/1990 | EP0384378A1 Method and installation for the continuous disposal and processing of water-based, fluid and solid drilling residues |
08/28/1990 | US4953147 Measurement of corrosion with curved ultrasonic transducer, rule-based processing of full echo waveforms |
08/25/1990 | WO1990010139A2 Undersea package and installation system |
08/23/1990 | WO1990009507A1 Oil removal from hydrocarbon contaminated cuttings |
08/21/1990 | US4949788 Well completions using casing valves |
08/07/1990 | US4945992 Injecting an aqueous solution of chlorine dioxide under pressure into a well |
08/07/1990 | US4945758 Method and apparatus for monitoring the interior surface of a pipeline |
07/24/1990 | US4942929 Disposal and reclamation of drilling wastes |
07/18/1990 | EP0211065B1 Corrosion inhibitor for high density brines |
07/17/1990 | CA1271684A1 Apparatus and method for retarding mineral buildup in downhole pumps |
07/11/1990 | EP0377378A1 Method and apparatus for the remote control of a drill string equipment by information sequences |