Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 41 - Equipment or details not covered by groups
Patents for E21B 41 - Equipment or details not covered by groups (7,984)
06/1990
06/30/1990CA2006938A1 Drill string equipment information sequence remote control method and device
06/28/1990WO1990007048A1 Dual wall well development tool
06/14/1990CA2005605A1 Dual wall well development tool
05/1990
05/29/1990US4928763 Method of treating a permeable formation
05/29/1990US4928760 Downhole coupon holder
05/29/1990CA1269613A1 Downhole corrosion coupon holder
05/22/1990US4927295 Retrievable guide post system
05/08/1990US4923010 Mud solids immune clean fluid compensating system
05/01/1990US4921044 Well injection systems
04/1990
04/24/1990US4919204 Apparatus and methods for cleaning a well
04/24/1990US4919201 Corrosion inhibition apparatus for downhole electrical heating
04/19/1990WO1990004083A1 Coupling arrangement for components in subsea structures and a remotely operated tool unit for handling such components
04/14/1990CA2000517A1 Interface arrangement
04/12/1990DE3903302C1 Drilling appliance
04/10/1990US4915168 Multiple well tool control systems in a multi-valve well testing system
04/05/1990WO1990003490A1 Lubricating arrangement for subsea valves
04/03/1990US4913590 Mono-atmospheric chamber
04/03/1990US4913585 Method of treating solids containing waste fluid
04/03/1990US4913245 Wellbore drilling cuttings treatment
04/03/1990US4913239 Submersible well pump and well completion system
04/03/1990US4913236 Corrosion resistance by forming alkaline component in vapor phase
03/1990
03/21/1990EP0359427A1 Method for monitoring and controlling scale formation in a well
03/20/1990US4909325 Horizontal well turbulizer and method
03/14/1990EP0357854A1 Retrievable guide post system
03/07/1990EP0357180A1 Subsea guidebase
02/1990
02/27/1990US4903769 Method of controlling permeability damage of hydrocarbon formations during steam injection using bicarbonate ions and sources of ammonia
02/20/1990US4902981 Well casing potential measurement tool with compensated DC errors
02/13/1990US4899821 Method and apparatus for servicing well casing and the like
01/1990
01/30/1990US4896726 Slip stream device
01/30/1990US4896722 Multiple well tool control systems in a multi-valve well testing system having automatic control modes
01/25/1990WO1990000491A1 Anchoring device
01/23/1990US4895710 High pressure, oil wells
01/16/1990US4893677 Guidelineless reentry system with retracting rollers
01/09/1990US4893286 System and method for preprocessing and transmitting echo waveform information
01/09/1990CA1264288A1 Production riser footing, and method for its activation
12/1989
12/26/1989US4889193 Rotary drill guard assembly and method
11/1989
11/29/1989EP0344060A2 Well tool control system and method
11/21/1989US4881850 Subsea guidebase
11/21/1989US4881473 Method and apparatus for treating oil-water-solids sludges and refinery waste streams
11/14/1989US4880468 Waste solidification composition and methods
11/07/1989US4878783 Hydraulic stab connector with angular freedom
11/07/1989US4878694 Method and device for the remote positioning of an elbow coupling
11/02/1989DE3812206A1 Apparatus for cleaning wells
10/1989
10/31/1989US4878053 Actuation method
10/25/1989EP0338832A1 Method and apparatus for retrieving a running tool/guideframe assembly
10/24/1989CA1262454A1 Deep-borehole drilling device
10/17/1989US4875031 Vapor monitoring system
10/10/1989US4872519 Drill string drill collars
10/04/1989EP0335162A2 Method and device for decontaminating soil layers
10/04/1989EP0334944A1 Apparatus and method for removing and recovering oil and/or other oil-based drilling mud additives from drill cuttings
10/04/1989CN2045423U Reusing oil drainer for oil pipe
10/03/1989US4871848 Oil, gas wells corrosion inhibitors
10/03/1989US4871024 Acid soluble copper metal salt intensifier, corrosion inhibitor
09/1989
09/26/1989US4869555 Apparatus for recovery of sulfur
09/26/1989CA1261734A1 Method and apparatus for placing cement plugs in wells
09/26/1989CA1261608A1 Water-based metal-containing organic phosphate compositions
09/19/1989US4867605 Method and apparatus for retrieving a running tool/guideframe assembly
09/19/1989US4867240 Method and apparatus for molding underground diaphragms
09/19/1989CA1259502A1 Devices for imparting rotary motion
09/13/1989EP0331842A1 Process and apparatus for recovery of oil
09/12/1989US4865490 Portable wellhead and welder protector system
09/05/1989US4862958 Coil tubing fluid power actuating tool
08/1989
08/29/1989US4860681 Apparatus for carrying out operations under water
08/23/1989EP0329262A2 Adjustable stabiliser for use in drilling string
08/22/1989US4858694 Heave compensated stabbing and landing tool
08/16/1989CN2042879U Clip-spring drip
08/15/1989US4857728 Method and apparatus for reducing radioactive hazards in well boreholes
08/15/1989US4856595 Well tool control system and method
08/15/1989US4856584 Method for monitoring and controlling scale formation in a well
08/10/1989WO1989007191A1 Clamped body replacement tool
08/10/1989WO1989007070A1 Subsea support arrangement
08/10/1989DE3901920A1 Apparatus for high-pressure injection
08/01/1989US4852667 Pressure relief process for well-drilling
07/1989
07/19/1989EP0324217A1 Safety system and method
07/05/1989EP0322958A2 Method and appararus for producing viscous crudes
07/04/1989US4845628 Method for optimization of drilling costs
07/04/1989US4844839 In situ treatment and analysis of wastes
07/04/1989US4844807 Insitu hazardous waste treating apparatus and method of using same
07/04/1989US4844162 Apparatus and method for treating geothermal steam which contains hydrogen sulfide
06/1989
06/28/1989CN2040140U Braking device of oil driller
06/27/1989US4842074 Gas storage well safety system and method
06/27/1989US4842056 Injecting aqueous solution of metal compound and reducing agent; corrosion resistance
06/13/1989US4839873 Subsea acoustic relocation system
06/13/1989US4839870 Pressure pulse generator system for measuring while drilling
06/13/1989US4839154 Mixing a surfactant in the solution and reacting with oxidizing agent
06/13/1989US4839022 Method and apparatus for treating oil-water-solids sludges and refinery waste streams
06/06/1989USH635 Injection mandrel
06/06/1989US4836302 Apparatus and method for removing and recovering oil and/or other oil-based drilling mud additives from drill cuttings
06/06/1989CA1255109A1 Offshore drilling and/or production system
05/1989
05/23/1989US4832127 Method and apparatus for producing viscous crudes
05/18/1989WO1989004497A1 Measurement of corrosion with curved ultrasonic transducer; rule-based processing of full echo waveforms; preprocessing and transmitting echo waveform information
05/16/1989US4830119 Top head drive cooling system
05/16/1989US4830112 Method and apparatus for treating wellbores
05/09/1989US4828035 Subsea guidepost latch mechanism and method for using
05/09/1989US4828030 Viscous oil recovery by removing fines
05/09/1989CA1253795A1 Method and apparatus for treating down hole equipment from corrosion in production well
05/02/1989US4825747 Method and device for detecting a fluid flow rate
04/1989
04/25/1989US4823879 Guidelineless reentry system with nonrotating funnel
04/25/1989US4823878 Guidelineless reentry system with fixed rollers
04/25/1989US4823826 Process and apparatus for introducing aqueous chloride dioxide into high pressure water injection wells
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