| Patents for E21B 28 - Vibration generating arrangements for boreholes or wells, e.g. for stimulating production (888) |
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| 01/15/2009 | WO2009008385A1 Method of underground injection of liquefied carbon dioxide and apparatus therefor |
| 01/14/2009 | CN201180509Y Down-hole energy accumulation type low frequency pressure pulse generator |
| 01/14/2009 | CN201180508Y Negative pressure sand pumping apparatus for oil gas well |
| 01/08/2009 | US20090008082 Sound source for stimulation of oil reservoirs |
| 12/31/2008 | WO2009002204A1 Arrangement for low frequency wave effect on the perforation zone of the well casting pipe |
| 12/31/2008 | WO2009000177A1 Environment-friendly apparatus for inhibiting paraffin and scales and reducing viscosity |
| 12/24/2008 | WO2008127390A3 Piezotube borehole seismic source |
| 12/11/2008 | US20080302528 Borehole Seismic Pulse Generation Using Rapid-Opening Valve |
| 12/10/2008 | EP1999338A1 Wellbore cleaning |
| 11/26/2008 | EP1994255A1 Borehole seismic pulse generation using rapid-opening valve |
| 10/15/2008 | EP1733119B8 Method for intensification of high-viscosity oil production and apparatus for its implementation |
| 10/08/2008 | CN101283159A Drill string suspension |
| 09/30/2008 | CA2417431C Fracturing different levels within a completion interval of a well |
| 09/23/2008 | CA2390277C Method and apparatus for seismic stimulation of fluid-bearing formations |
| 08/19/2008 | US7413010 Remediation of subterranean formations using vibrational waves and consolidating agents |
| 07/31/2008 | US20080182699 Transmission System for Pump Drive |
| 07/17/2008 | WO2008083471A1 Methods and apparatus for enhanced oil recovery |
| 07/17/2008 | CA2674903A1 Methods and apparatus for enhanced oil recovery |
| 07/15/2008 | CA2588235C Electroacoustic method and device for stimulation of mass transfer processes for enhanced well recovery |
| 07/03/2008 | US20080156483 Oil recovery enhancement method |
| 07/02/2008 | EP1937929A1 Drill string suspension |
| 06/19/2008 | US20080142226 Liquid carbon dioxide cleaning of wellbores and near-wellbore areas using high precision stimulation |
| 06/17/2008 | CA2553071C Method for intensification of high-viscosity oil production and apparatus for its implementation |
| 05/21/2008 | EP1733119B1 Method for intensification of high-viscosity oil production and apparatus for its implementation |
| 05/14/2008 | EP1350006B1 Method and apparatus for treating a wellbore with vibratory waves to remove particles therefrom |
| 05/08/2008 | WO2008054255A1 Plant for producing an action on a bottomhole zone |
| 05/06/2008 | US7367392 Wellbore apparatus with sliding shields |
| 04/30/2008 | EP1915509A1 Pulse width modulated downhole flow control |
| 04/22/2008 | US7360596 Method and device for intensifying the permeability of ground layers close to bore holes and filter bodies and filter layers in wells and other production wells |
| 04/15/2008 | US7357197 Method and apparatus for monitoring the condition of a downhole drill bit, and communicating the condition to the surface |
| 04/10/2008 | WO2008041856A1 Offshore power plant |
| 04/10/2008 | US20080083530 Frac head including a mixing chamber |
| 04/10/2008 | CA2662534A1 Offshore power plant |
| 04/02/2008 | CN101155972A Sound source for stimulation of oil reservoirs |
| 04/01/2008 | US7350567 Increasing media permeability with acoustic vibrations |
| 03/27/2008 | US20080073076 Reduction of expansion force via resonant vibration of a swage |
| 03/20/2008 | US20080066917 Annular fracturing combo service tool |
| 03/04/2008 | US7337844 Perforating and fracturing |
| 02/20/2008 | CN201024944Y Super vibration blockage release and oil increase device |
| 02/14/2008 | US20080035329 Interconnect rod for sucker rod string |
| 01/15/2008 | US7318471 System and method for monitoring and removing blockage in a downhole oil and gas recovery operation |
| 01/03/2008 | DE19944032B4 Vorrichtung und Verfahren zur Erzeugung seismischer Schwingungen Apparatus and method for generating seismic vibrations |
| 12/19/2007 | CN200992971Y Pressure pulse blockage removal controller |
| 12/18/2007 | CA2436966C Method and apparatus for treating a wellbore with vibratory waves to remove particles therefrom |
| 11/28/2007 | EP1859124A1 Sound source for stimulation of oil reservoirs |
| 11/14/2007 | CN200975230Y Waterpower pulse vibration cementing guide shoe |
| 11/08/2007 | US20070256828 Method and apparatus for reducing a skin effect in a downhole environment |
| 10/11/2007 | WO2007113477A1 Wellbore cleaning |
| 10/11/2007 | CA2647494A1 Wellbore cleaning |
| 10/09/2007 | CA2465019C Well tubing/casing vibrator apparatus |
| 10/03/2007 | CN200955366Y Pulse oil-production production-increasing device of strong swabbing following pump |
| 10/02/2007 | US7275600 Apparatus and method for expanding tubular members |
| 09/12/2007 | CN101033684A Mechanical plug-removal oil extraction device |
| 09/07/2007 | WO2007100352A1 Borehole seismic pulse generation using rapid-opening valve |
| 09/07/2007 | CA2621855A1 Borehole seismic pulse generation using rapid-opening valve |
| 09/04/2007 | US7264056 System and method for the mitigation of paraffin wax deposition from crude oil by using ultrasonic waves |
| 09/04/2007 | US7264055 Apparatus and method of applying force to a stuck object in a wellbore |
| 08/29/2007 | EP1825095A1 Vibrational apparatus |
| 08/16/2007 | US20070187112 Running and cementing tubing |
| 08/08/2007 | CN2931762Y New type plug removal device of oil and water well |
| 08/01/2007 | CN2929155Y Artificial earthquake oil increasing car |
| 08/01/2007 | CN2929154Y Block resolving device for oil-gas-water well |
| 07/19/2007 | WO2007081240A1 Method and device for treating bottom-hole zones of oil-and-gas-bearing formations |
| 07/19/2007 | CA2636766A1 Method and device for treating bottom-hole zones of oil-and-gas-bearing formations |
| 07/11/2007 | CN2921275Y Rotary valve type slurry positive pulse generator |
| 07/11/2007 | CN2921261Y Self-excitation vibration deplugging oil-adding device |
| 07/11/2007 | CN1995692A Disk type eddy oscillating viscosity-reduction paraffin control device for use in sucker rod |
| 06/13/2007 | CN2911173Y Ultrasonic visbreaking device |
| 06/06/2007 | EP1232330B1 Method and apparatus for seismic stimulation of fluid-bearing formations |
| 06/06/2007 | CN1975103A Chemical pulse compound unplugging method |
| 06/06/2007 | CN1975099A Mixed-gas water exciting sound wave unplugging device |
| 05/31/2007 | WO2007061333A1 Acoustic downhole device |
| 05/22/2007 | US7219747 Providing a local response to a local condition in an oil well |
| 05/22/2007 | US7219726 Method and apparatus to vibrate a downhole component |
| 05/09/2007 | CN1314880C Method and apparatus for seismic stimulation of fluid-bearing formations |
| 05/08/2007 | US7213650 System and method for scale removal in oil and gas recovery operations |
| 05/08/2007 | US7213641 Fracturing head with replaceable inserts for improved wear resistance and method of refurbishing same |
| 04/25/2007 | CN1312378C Method for generating electric power in or near gas transportation duct and thermoacoustic electric power generator |
| 04/18/2007 | CN2890322Y Downhole low-frequency vibration generator |
| 04/10/2007 | US7201231 Apparatuses and methods for deploying logging tools and signalling in boreholes |
| 04/05/2007 | WO2007037704A1 Drill string suspension |
| 04/05/2007 | CA2623012A1 Drill string suspension |
| 04/04/2007 | CN1940250A Active permanent-magnetic vibrator and block-proof and output-increasing method for oil well |
| 03/28/2007 | CN1936266A Oil-well low-frequency acoustic vibration unblocking and yield-increasing apparatus and method |
| 03/27/2007 | US7195069 Method and apparatus for backing off a tubular member from a wellbore |
| 03/21/2007 | CN1934331A Method for intensification of high-viscosity oil production and apparatus for its implementation |
| 03/07/2007 | CN2876316Y Permanent magnet autonomous vibration deblocking and yield increasing equipment |
| 03/07/2007 | CN2876315Y Oil well low frequency sound wave vibration deblocking and yield increasing equipment |
| 02/28/2007 | CN1920242A Mechanical block-relief oil production device |
| 02/27/2007 | US7182170 Gerotor and bearing system for whirling mass orbital vibrator |
| 02/22/2007 | WO2007021274A1 Pulse width modulated downhole flow control |
| 02/14/2007 | EP1750930A1 Downhole ultrasonic well cleaning device |
| 01/04/2007 | WO2007001187A1 Impact hammer for coiled tubing drilling |
| 12/27/2006 | EP1305503B1 Fracturing different levels within a completion interval of a well |
| 12/20/2006 | EP1733119A1 Method for intensification of high-viscosity oil production and apparatus for its implementation |
| 12/20/2006 | CN2849133Y Servopump pulse resonant unlocking yield increasing device |
| 12/13/2006 | EP1730663A2 Providing a local response to a local condition in an oil well |
| 12/13/2006 | CN2846737Y High density filling vibration device |
| 12/13/2006 | CN1289784C Method and apparatus for increasing liquid hydrocarbon yield |
| 12/07/2006 | US20060272805 Formation and control of gas hydrates |