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 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
Patents for E21B 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (64,186)
12/1998
12/23/1998EP0824628B1 Connector assembly for an expandable slotted pipe
12/23/1998EP0662997B1 Method for stabilising crude oils at the outlet of a well, and device therefor
12/23/1998CN2301533Y Sand control device
12/23/1998CN1202966A Automatic well test system and method of operating the same
12/23/1998CN1202922A Cleaning compositions for oil and gas well, lines, casings, formations and equipment and its methods of use
12/22/1998US5851389 Apparatus for removing a contaminant from a fluid stream
12/22/1998US5850875 Method of positioning a screen within a subterranean well
12/22/1998CA2095937C Sealing assembly for rotary oil pumps and method of using same
12/18/1998CA2208197A1 Method and apparatus for subterranean thermal conditioning
12/17/1998WO1998057032A1 A method and a system for improving the utilization of oil deposits from an underwater well at low reservoir pressure
12/17/1998WO1998057031A1 System for drilling and completing multilateral wells
12/17/1998WO1998057030A1 Control and monitoring system for chemical treatment of an oilfield well
12/17/1998WO1998056497A1 Fluids containing viscoelastic surfactant and methods for using the same
12/17/1998WO1998056466A1 A method and system for treating biodegradable waste material through aerobic degradation
12/17/1998DE19729809C1 Vorrichtung und Verfahren zum Herstellen von Bohrlochverzweigungen Apparatus and method for producing borehole branches
12/16/1998EP0884451A2 Cable anchor assembly
12/16/1998EP0884117A2 Device for removing gases from a landfill
12/16/1998EP0883732A2 Downhole flow stimulation in a natural gas well
12/16/1998EP0739290B1 A vessel for production and/or loading/unloading and transport of hydrocarbons from offshore fields, and/or for carrying out well operations
12/16/1998CN2300724Y Gas liquid separator for oil pumping well
12/16/1998CN2300723Y Water-filling oil pipe slow releasing device
12/16/1998CN2300437Y Electric dewatering device for crude oil
12/15/1998US5849188 Wire mesh filter
12/15/1998US5848645 Method for fracturing and gravel-packing a well
12/15/1998US5848641 Well pump puller
12/10/1998WO1998055208A1 Process for generating power including a combustion process
12/09/1998EP0882869A2 Method of perforating a well casing and downhole tool hanger
12/09/1998EP0882868A2 Method of suspending an ESP within a wellbore
12/09/1998EP0882171A2 Downhole apparatus
12/09/1998EP0644979B1 Method and apparatus for inspecting subsurface environments
12/09/1998CN2299939Y Floating underground negative-pressure generator
12/09/1998CN1041058C Stable emlsion of viscous crude hydrocarbon in aqueous buffer and preparation method
12/08/1998US5846432 Method for lifting oil-based liquid
12/08/1998US5845712 Method of producing fluid from a formation
12/08/1998US5845710 Methods of completing a subterranean well
12/08/1998US5845709 Recirculating pump for electrical submersible pump system
12/08/1998CA2126422C Consolidatable particulate material and well treatment method
12/03/1998WO1998054441A2 Method and apparatus for multi-phase separation
12/03/1998DE19715278A1 Deep hole tube pump gear unit for moving crude oil
12/02/1998EP0881357A2 Method for controlling the development of an oil or gas reservoir
12/02/1998EP0881355A2 System for deploying an electrical submersible pump within a wellbore
12/02/1998EP0881354A2 Method and apparatus for cementing a well
12/02/1998EP0706427B1 In-situ remediation of contaminated heterogeneous soils
12/02/1998CN2299152Y Reducing sleeve obtaining appts.
12/02/1998CN2299151Y Reducing sleeve continuous pipe oil obtaining appts.
12/02/1998CN1200786A Method and equipment for treating well stream from offshore oil field
12/02/1998CN1200429A Method for obtg. oil by using alternatively ejecting pump and sucker rod pump one after another
12/01/1998US5844397 Downhole pumping system with variable speed pulse width modulated inverter coupled to electrical motor via non-gap transformer
12/01/1998US5842528 Method of drilling and completing wells
12/01/1998US5842522 Mechanical connection between base pipe and screen and method for use of the same
12/01/1998US5842521 Downhole pressure relief valve for well pump
12/01/1998US5842520 Split stream pumping system for oil production using electric submersible pumps
12/01/1998US5842518 Method for drilling a well in unconsolidated and/or abnormally pressured formations
12/01/1998US5842516 Erosion-resistant inserts for fluid outlets in a well tool and method for installing same
11/1998
11/29/1998CA2239001A1 System for deploying an esp within a wellbore
11/26/1998WO1998053182A1 Sub-sea pumping system and associated method
11/26/1998WO1998053181A1 Oil recovery method using an emulsion
11/26/1998WO1998053174A1 Apparatus and method for drilling and lining a lateral wellbore
11/26/1998WO1998052873A2 In-well air stripping, oxidation, and adsorption
11/25/1998EP0879935A2 Method of controlling fine particulate flowback in subterranean wells
11/25/1998EP0879934A1 System and method for connecting two relatively movable assemblies, especially in underwater installations
11/25/1998EP0879342A1 Wireline/coiled tubing retrievable well pump
11/25/1998EP0835359A4 Spiral or wave strip perforating system
11/24/1998US5839513 Compressor-assisted annular flow
11/24/1998US5839510 Control of particulate flowback in subterranean wells
11/24/1998US5839509 Method and apparatus for gathering liquid sample using a submersible pump
11/20/1998CA2245229A1 Method and apparatus for reducing water in gas producing well
11/19/1998WO1998051949A1 Downhole hydrocarbon pump
11/19/1998WO1998051903A1 A connection device
11/19/1998WO1998035131A3 Tool and method for removing excess cement from the top of a liner after hanging and cementing thereof
11/19/1998DE19720064A1 Demolition triggering device
11/18/1998EP0877895A1 A sub-sea pumping system and an associated method
11/18/1998EP0877854A1 Small hole retrievable perforating system for use during extreme overbalanced perforating
11/18/1998CN2297539Y Swirl jet of perforator using underground high pressure hydraulic action
11/18/1998CN2297538Y Underground high pressure hydraulic perforator
11/18/1998CN2297537Y Sewage return injection device for oil field development
11/18/1998CN2297536Y Underpump rotary stirring emulsifying and viscosity-reducing oil-producing pipe string for high viscous crude
11/18/1998CN1199129A Co-well oil-pumping and water-injecting technological system
11/17/1998US5837925 Shaped charge retainer system
11/17/1998US5837656 Well treatment fluid compatible self-consolidating particles
11/17/1998US5836393 Pulse generator for oil well and method of stimulating the flow of liquid
11/17/1998US5836389 Apparatus and method for increasing production rates of immovable and unswept oil through the use of weak elastic waves
11/17/1998CA2210239C Integral tubing head and rotator
11/12/1998WO1998050681A1 Wellbores utilizing fiber optic-based sensors and operating devices
11/12/1998WO1998050680A2 Monitoring of downhole parameters and tools utilizing fiber optics
11/12/1998WO1998050679A1 Communicating horizontal well network
11/12/1998WO1998050678A1 Perforating apparatus and method
11/12/1998WO1998050677A1 A gas-lift ball control device in gas-lift ball oil recovery and a method of oil recovery
11/12/1998WO1998050592A1 In-situ chemical reactor for recovery of metals or purification of salts
11/12/1998WO1998050179A1 Remediation method
11/12/1998CA2289126A1 In-situ chemical reactor for recovery of metals or purification of salts
11/11/1998CN1198812A Method and apparatus for controlled small-charge blasting of hard rock and concrete by explosive pressurization of the bottom of a drill hole
11/10/1998US5833853 Radial-flow filter and method of manufacture
11/10/1998US5833004 Method of running liners into a wellbore
11/10/1998US5833001 Sealing well casings
11/10/1998US5833000 Control of particulate flowback in subterranean wells
11/10/1998US5832999 Pyrophoric liquid is transported from slug launching chamber into fuel gas stream, flushing chamber with hydrocarbon liquid to remove any pyrophoric liquid
11/10/1998CA2132895C Method of eliminating severe slug in multi-phase flow subsea lines
11/10/1998CA2113223C Multi-layer composite screen
11/05/1998WO1998049424A1 Using equipment in a well system
1 ... 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 ... 642