E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor

Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780)
11/2001
11/29/2001	US20010045285 Mudsaver valve with dual snap action
11/28/2001	EP1157189A1 Internal riser rotating control head
11/27/2001	US6322693 Waste processing system and related methods
11/27/2001	US6322489 Restoring high moisture environments; recover drill cuttings, separate drill cutting from drill fluid, mix cutings, position cuttings in high moisture environments
11/27/2001	US6321860 Cuttings injection system and method
11/22/2001	WO2001088327A1 Bypass valve
11/22/2001	WO2001088326A1 Device for sealing a drill hole and for discharging drillings or stripped extraction material
11/21/2001	EP1155216A1 Drilling method
11/21/2001	CN2460721Y Wave-type mud vibrating screen mesh
11/20/2001	USRE37450 Directional multi-blade boring head
11/20/2001	US6318482 Blowout preventer
11/15/2001	WO2001086112A2 Mud bucket seal attachment
11/15/2001	WO2001086110A1 Subsea riser disconnect and method
11/15/2001	US20010040055 Rock drill bit and a check valve therefor
11/15/2001	US20010040052 Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling
11/15/2001	US20010039887 Drilling fluid recovery and cuttings processing system
11/15/2001	DE10115233A1 Horizontal drilling system has mixing unit mounted on running gear with inlet for connection to liquid source, output connector(s) for reversible connection to flushing liquid sink
11/15/2001	CA2408807A1 Subsea riser disconnect and method
11/14/2001	EP1153197A1 Method and apparatus for cleaning drill cuttings
11/14/2001	EP1153196A1 Casing mounted sensors
11/13/2001	US6315813 Method of treating pressurized drilling fluid returns from a well
11/13/2001	US6315495 Portable environmental containment system
11/13/2001	US6315051 Continuous circulation drilling method
11/08/2001	WO2001083936A1 Extracting oil from drill cuttings
11/08/2001	US20010037900 Mud saver kelly valve
11/08/2001	CA2378141A1 Extracting oil from drill cuttings
11/07/2001	EP1151179A1 Removal of oil and chloride from oil contaminated material
11/07/2001	CN1320470A Rotation-type filter method for well-drilling fluid and 4 special devices for implementing it
11/06/2001	US6311791 Hydraulic underreamer and sections for use therein
11/06/2001	US6311790 Removable boring head with tapered shank connector
11/01/2001	WO2001082166A1 Method and system for trade of goods, in particular electricity, water, fuel gas and the like
11/01/2001	WO2001081015A1 Shale shaker screen retainer
11/01/2001	US20010035220 Dual snap action for valves
10/2001
10/31/2001	EP1149979A1 Portable seismic shothole drilling system
10/31/2001	CN2457339Y Switch type water injection mandrel
10/31/2001	CN2457325Y Air type reverse circulation casing drilling tool
10/30/2001	US6308783 Wellbore flow control device
10/30/2001	US6308780 Method for regaining mud circulation in operating well and device for its embodiment
10/29/2001	CA2344796A1 Portable seismic shothole drilling system
10/25/2001	WO2001079653A1 A rock drill bit and a check valve
10/25/2001	WO2001079652A1 Top drive for casing connection
10/25/2001	WO2001079648A2 Methods of drilling a bore hole and dehydrating drilling fluids
10/25/2001	DE10005941A1 Method for producing bore holes for piling has a rock cutting hammer and concrete supply duct incorporated into a multi purpose boring head
10/25/2001	CA2850900A1 Top drive for casing connection
10/25/2001	CA2756624A1 Top drive for casing connection
10/24/2001	EP1147286A1 Slurry treatment
10/24/2001	CN2455929Y Underwell water injection cyclic valve
10/23/2001	US6305469 Method of creating a wellbore
10/23/2001	US6305467 Wireless coiled tubing joint locator
10/18/2001	WO2001076719A2 A screen assembly, a support structure, a method of making same and a vibratory shaker
10/18/2001	US20010031705 Homogenizing drilling fluid which produce a non-clogging homogenized drilling fluid at high throughput, in an open-loop process in efferot to eliminate the clogging within the closed-loop designed drilling fluid system
10/17/2001	EP1144804A1 Method for detecting inflow of fluid in a well while drilling and implementing device
10/17/2001	EP1144800A1 Method and device for adjusting at a set value the bore fluid level in the riser
10/17/2001	EP1144540A1 Removal of h 2?s in drilling mud
10/16/2001	US6302276 Screen support strip for use in vibratory screening apparatus
10/16/2001	US6302216 Flow control and isolation in a wellbore
10/16/2001	US6302205 Method for locating a drill bit when drilling out cementing equipment from a wellbore
10/16/2001	US6302201 Method and apparatus for washing subsea drilling rig equipment and retrieving wear bushings
10/16/2001	US6302199 Mechanism for dropping a plurality of balls into tubulars used in drilling, completion and workover of oil, gas and geothermal wells
10/16/2001	CA2175859C Dehydration of drilling fluids
10/11/2001	WO2001075343A1 Dual snap action for valves
10/11/2001	WO2001075266A1 Mudsaver valve with dual snap action
10/11/2001	WO2001074967A1 Methods for reducing lost circulation in wellbores
10/11/2001	US20010027880 Aphron-containing well drilling and servicing fluids
10/11/2001	CA2408182A1 Mudsaver valve with dual snap action
10/10/2001	EP1141514A2 Pipe assembly with a plurality of outlets for use in a wellbore and method for running such a pipe assembly
10/10/2001	EP1141513A1 Apparatus and method for facilitating the connection of tubulars using a top drive
10/10/2001	EP1141512A1 An apparatus and method for facilitating the connection of tubulars using a top drive
10/10/2001	EP1140379A1 Screen assembly for use in a vibratory shaker
10/10/2001	CN2453118Y Device for random control of drill liquid injection
10/10/2001	CN2453117Y Plate like mud vibration sieve screen
10/10/2001	CN2453116Y Drilling liquid vibration sieve
10/09/2001	US6298919 Downhole hydraulic path selection
10/04/2001	US20010027168 Method and apparatus for homogenizing drilling fluid in an open-loop process
10/04/2001	EP1138740A1 Organophilic clay additives and oil well drilling fluids with less temperature dependent rheological properties containing said additives
10/04/2001	EP1114116A4 Aphron-containing well drilling and servicing fluids of enhanced stability
10/04/2001	EP0620892B1 Case cementing method and system
10/03/2001	CN2451721Y Automatic device for flushing borehole
10/02/2001	US6296056 Subsurface measurement apparatus, system, and process for improved well drilling, control, and production
10/02/2001	US6296055 Combination retrievable drilling fluid filter and wiper
10/02/2001	CA2229881C Down hole mud circulation system
09/2001
09/27/2001	US20010023765 Lubricator for underbalanced drilling
09/27/2001	US20010023764 Lubricator for underbalanced drilling
09/26/2001	EP0832344A4 Down hole hammer assembly
09/26/2001	CN2450374Y Strong sand washing device
09/25/2001	US6293342 Bypass valve closing means
09/20/2001	WO2001069036A1 Downhole surge pressure reduction and filtering apparatus
09/20/2001	WO2001069034A2 Wellbore circulation system, kelly bushing, kelly and tong
09/20/2001	WO2001068300A1 Concrete drilling system and related methods
09/20/2001	US20010022241 Bottomhole assembly and methods of use
09/20/2001	CA2401675A1 Concrete drilling system and related methods
09/19/2001	EP0904479B1 Multi-cycle circulating sub
09/19/2001	CN2448912Y Composite cylinder type screen cloth structure for drilling mud
09/18/2001	US6290068 Shaker screens and methods of use
09/18/2001	US6289998 Downhole tool including pressure intensifier for drilling wellbores
09/18/2001	US6289987 Integral blade downhole wash tool
09/18/2001	US6289911 Mud saver kelly valve
09/13/2001	WO2001067068A2 Apparatus and method for continuous measurement of drilling fluid properties
09/13/2001	WO2001066912A1 Method and apparatus enhanced acoustic mud pulse telemetry
09/13/2001	WO2001066911A1 Method and apparatus for enhanced acoustic mud pulse telemetry during underbalanced drilling

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