E21B 37 - Methods or apparatus for cleaning boreholes or wells

Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129)
12/1994
12/08/1994	WO1994028283A1 Tubing unloader apparatus and method
12/08/1994	DE4318759A1 Device for cleaning pipes
12/07/1994	CN2184778Y Well wax scraper and cleaner
12/07/1994	CA2097891A1 Tool method of well clean out
12/06/1994	US5370799 Elevated temperature-pressure flow simulator
11/1994
11/30/1994	CN1026812C Assisting spraying pipe apparatus freely suspended in deep well
11/30/1994	CN1026810C Method and apparatus for removing wax from oil well pipeline
11/29/1994	US5368103 Method of setting a balanced cement plug in a borehole
11/22/1994	US5366016 Use of variable density carrier fluids to improve the efficiency of scale dissolution
11/10/1994	WO1994025731A1 Acidising underground reservoirs
11/10/1994	WO1994025728A1 Method for placement of a scale inhibitor in a formation
11/09/1994	CN2182261Y Mud scraper for drill rod
11/02/1994	CN1026429C Rotary wax scraper
10/1994
10/26/1994	CN2180775Y Gauge for oil pipe through diameter
10/26/1994	CN2180774Y Automatic sand flushing pipe column for oil well
10/19/1994	EP0620356A2 Method and device for the cleaning of wellscreens in wells
10/18/1994	CA2030103C Technique for stimulating long intervals
10/12/1994	EP0618995A1 Use of selected inhibitors against the formation of solid organic-based incrustations from fluid hydrocarbon mixtures
10/04/1994	US5351758 Tubing and profile reaming tool
10/04/1994	US5351756 Contacting in situ with a solution of water, anti-hydrate stabilizers which able to vaporize at low temperature than water, separating the stabilizer from gases by condensation, recycling to reuse
09/1994
09/27/1994	US5350390 Device for removal of intraluminal occlusions
09/21/1994	CN2177800Y Self-climbing well type wax scraper
09/21/1994	CN1092501A Wax removing bullet for oil well
09/20/1994	US5348086 Combination downhole tool
09/16/1994	CA2115623A1 Process for the thermo-chemical dewaxing of hydrocarbon transmission conduits
09/14/1994	CN2177090Y Automatic cleaner for oil sucking well
09/06/1994	US5343953 Through-tubing recirculating tool assembly for well completions
09/06/1994	US5343941 Apparatus for treating oil and gas wells
09/01/1994	DE4243303C1 Process for cleaning a well shaft
08/1994
08/24/1994	EP0457879B1 Device and method for cleaning an underground well
08/23/1994	US5339899 Drilling fluid removal in primary well cementing
08/23/1994	US5339896 Field installable rod guide and method
08/18/1994	WO1994019288A1 Process for preventing deposits in a structure's drainage system
08/18/1994	WO1994018430A1 Application of n,n-dialkylamides to reduce precipitation of asphalt from crude oil
08/18/1994	CA2117911A1 A process for preventing the formation of deposits in a construction drainage system
08/16/1994	US5337819 Washing tool
08/16/1994	CA2070870C Stop for an oil well swabbing device
08/09/1994	US5335723 Combination scratcher-centralizer for wellbore casings
08/03/1994	EP0608238A1 Electro-vac decontamination process
07/1994
07/26/1994	US5332050 Nickel-phosphorous coating to prevent adhesion of particles and fluids
07/26/1994	US5332045 Apparatus and method for placing and for backwashing well filtration devices in uncased well bores
07/19/1994	CA2053334C Process for running scrapers, particularly for subsea petroleum well lines
07/13/1994	CN2171673Y Automatic anti-blockage system without cable for oil extraction
07/13/1994	CN2171672Y Bypass valve
07/12/1994	US5327974 Method and apparatus for removing debris from a wellbore
06/1994
06/23/1994	WO1994013929A1 Method and apparatus for cleaning wellbore perforations
06/21/1994	US5322128 Method of forming well regions
06/07/1994	US5318128 Method and apparatus for cleaning wellbore perforations
05/1994
05/17/1994	US5311955 Installation for cleaning the zone near the drill hole
05/03/1994	US5308660 Adhesion prevention
04/1994
04/27/1994	EP0594479A1 Process to reduce the tendency to agglomerate of hydrates in production effluents
03/1994
03/30/1994	CN2160014Y Block releasing type sand flushing pen tip
03/29/1994	US5297631 Method and apparatus for downhole oil well production stimulation
03/16/1994	CN2158914Y High-pressure ringlike spraying-nozzle well-cleaning apparatus
02/1994
02/22/1994	US5288411 Using polyacrylates and phosphonolated amines dispersants
02/22/1994	US5287923 Sand control installation for deep open hole wells
02/15/1994	US5285847 For agitating sand and gravel particles within well shafts
02/09/1994	CN2155428Y Thermodynamic valve
02/01/1994	US5282509 Method for cleaning cement plug from wellbore liner
01/1994
01/26/1994	CN2154346Y Special callipers for cleaning oil tube with thermal current
01/25/1994	US5282263 Method of stumulating oil wells by pumped solvent heated in situ to reduce wax obstructions
01/25/1994	US5280825 Device and installation for the cleaning of drains, particularly in a petroleum production well
01/18/1994	CA1326208C Swabbing mandrel
01/12/1994	CN2152903Y Flexible wax scraper for oil pipe
01/11/1994	CA1325969C Conduit or well cleaning and pumping device and method of use thereof
12/1993
12/29/1993	EP0469133B1 Device for delivering corrosion or deposition inhibiting agents into a well by means of an auxiliary delivery tube
12/29/1993	CN1023337C Automatic oil well wax cleaning aparatus
12/22/1993	CN2150329Y Wax-scraping righting device for oil-pumping well
12/09/1993	WO1993024199A1 Method for removing alkaline sulfate scale
12/07/1993	US5268108 Control of scale deposition in geothermal operations
12/07/1993	US5267616 Process for running scrapers, particularly for subsea petroleum well lines
11/1993
11/24/1993	EP0571257A1 Process for the treatment and the transport of natural gas coming from a well
11/24/1993	CN2147343Y Electromagnet vibration device for oil well extracting
11/23/1993	USRE34451 Perforating gun with auger
11/18/1993	EP0569484A1 Well cleanout using caustic alkyl polyglycoside compositions.
11/17/1993	CN2146566Y Hot cleaning paraffin temp-control packer
11/11/1993	WO1993022537A1 Microencapsulated oil field chemicals and process for their use
11/10/1993	CN1078289A Controllable working state variable electric wax-cleaning winch
11/03/1993	EP0568292A1 Reamer
10/1993
10/27/1993	CN2144709Y Cartridge container core type strong magnetic device for preventing deposition of paraffin
10/20/1993	CN1077514A Dewaxing method for oil well pipe and its equipment
10/12/1993	US5251697 Adding to said water non-compressible solids
09/1993
09/29/1993	EP0562301A1 Configuration method for water wells
09/28/1993	US5247994 Heating to remove solid wax deposits
09/21/1993	US5246074 Slip stream device with adjustable choke, and method of choking a fluid flow path
09/16/1993	WO1993018321A1 Oil well plunger
09/15/1993	CN2142141Y Drip adapted for thermic drilling
09/08/1993	CN1076002A Oil well paraffin cleaning agent
09/02/1993	WO1993016833A1 Broaching tool for tubing
08/1993
08/25/1993	CA2090193A1 Method for removing zinc sulfide and lead sulfide scale deposits
08/24/1993	US5238061 Gas operated
08/17/1993	US5236036 Device for delivering corrosion or deposition inhibiting agents into a well by means of an auxiliary delivery tube
08/05/1993	WO1993015305A1 Pressurized chemical injection system
07/1993
07/28/1993	CN2139116Y Permanent-magnet fluid magnetizer
07/27/1993	US5230388 Method and apparatus for cleaning a bore hole using a rotary pump
07/21/1993	CN1021661C Stabilized sulfur dissolving compositions
07/20/1993	US5228508 Perforation cleaning tools
07/20/1993	CA1320502C Polyalkyleneoxyamine catalysts for dialkyl disulfides and/or polysulfides used in dissolving sulfur
07/13/1993	CA1320126C Method and apparatus for operating a well to remove production limiting or flow restrictive material
07/08/1993	WO1993013294A1 Use of selected inhibitors against the formation of solid organic-based incrustations from fluid hydrocarbon mixtures

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