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 7 - Special methods or apparatus for drilling
Patents for E21B 7 - Special methods or apparatus for drilling (22,064)
11/2000
11/07/2000US6142245 Extended reach drilling system
11/07/2000US6142236 Method for drilling and completing a subsea well using small diameter riser
11/07/2000US6142235 Bottom-supported guidance device for alignment of multiple wellbores in a single conductor
11/07/2000US6142225 Selective mono bore diverter system
11/02/2000EP1048820A2 Method for exploiting geothermal energy and heat exchanger apparatus therefor
11/02/2000EP1047860A1 Apparatus and method for milling through a whipstock in a wellbore
11/02/2000DE19931839C1 Device for lifting and conveying away waste material from a pipe cutter
11/02/2000DE19923555C1 Directional borehole drilling device uses radially adjustable steering head incorporated in driven drill rod for determining drilling direction
11/02/2000DE10016948A1 Measurement of the deviation of a bore hole from its nominal direction using a probe encapsulated above the bore head with sensors for inclination, depth and compass direction and a memory for recording data as a function of time
10/2000
10/31/2000US6138780 Drag bit with steel shank and tandem gage pads
10/31/2000US6138777 Hydraulic underreamer and sections for use therein
10/31/2000US6138775 Boring machine
10/26/2000WO2000063528A1 Dual diverter and orientation device for multilateral completions and method
10/26/2000WO2000063521A1 Method and apparatus for accurate milling of windows in well casings
10/26/2000WO2000037767A3 Profile formation
10/26/2000DE19917538A1 Horizontal wet drilling tool uses vibration device for periodic impact of drill rod or drill head in longitudinal direction during horizontal displacement
10/26/2000CA2536385A1 Expandable connector for borehole tubes
10/25/2000EP0670008A4 Method and apparatus for setting a whipstock
10/25/2000CN1271056A Expandable sensor device and method
10/24/2000US6135208 Expandable wellbore junction
10/24/2000US6135206 Apparatus for completing a subterranean well and associated methods of using same
10/24/2000CA2180048C Keyless latch for orienting and anchoring downhole tools
10/19/2000WO2000061916A1 Three-dimensional steering tool for controlled downhole extended-reach directional drilling
10/19/2000WO2000061915A1 Method of creating a wellbore in an underground formation
10/19/2000WO2000061907A1 Arrangement in rock drilling apparatus
10/19/2000WO2000061335A1 Post driving and earth boring machine
10/19/2000DE19901001A1 Borehole drilling device has frame supporting rotary drive provided with drill rod magazine for interchangable drill rods handled via transport arm with drill rod release device
10/18/2000EP1045113A1 Deployable sensor apparatus and method
10/18/2000EP1044315A1 Apparatus for facilitating removal of a casing of an overburden drilling equipment from a bore
10/18/2000EP1044314A1 Drilling system including eccentric adjustable diameter blade stabilizer
10/18/2000EP0888489A4 Hydrocarbon recovery method using inverted production wells
10/17/2000CA2272773C Method of drilling boreholes in areas with restricted access
10/12/2000WO2000060210A1 Mounting assembly
10/12/2000DE19941536C1 Assembly to lay a buried pipe without a dug trench has a powered drilling tool with openings for the spoil to pass through into an extraction tube as the pipe in pulled through the ground
10/11/2000EP1042587A4 System for drilling and completing multilateral wells
10/11/2000EP1042587A1 System for drilling and completing multilateral wells
10/11/2000EP0657006B1 Guided mole
10/10/2000US6129160 Torque compensation apparatus for bottomhole assembly
10/10/2000US6129159 Vibratory drill head apparatus
10/05/2000WO2000058599A1 Method of and apparatus for horizontal well drilling
10/05/2000WO2000058597A1 Method for installing a number of risers or tendons and vessel for carrying out said method
10/05/2000WO2000058594A1 Whipstock casing milling system
10/05/2000WO2000047826B1 Short aggregate pier techniques
10/04/2000EP1041240A2 Auger drill
10/04/2000EP1040250A1 System and method for positioning a tool in a wellbore
10/04/2000EP1040231A1 Soil consolidation apparatus, tool and method
10/04/2000CN1269003A Method and apparatus for cleaning public pipeline and then changed with polyolefin pipeline
10/03/2000US6125950 Collared boring bit
10/03/2000US6125949 Method of and apparatus for horizontal well drilling
10/03/2000US6125786 Underground warning system for underground conduits or pipes
09/2000
09/28/2000WO2000057543A1 High frequency switch-mode dc powered computer system
09/28/2000WO2000057018A1 Rotary steerable system for use in drilling deviated wells
09/28/2000CA2367523A1 Rotary steerable system for use in drilling deviated wells
09/27/2000EP1038087A1 Assembly and process for drilling and completing multiple wells
09/27/2000CN1267779A Combined drilling tool and drilling process for coal bed gas well
09/27/2000CN1056906C Method for measuring direction of borehole
09/26/2000US6123150 Branch boreholes
09/21/2000WO2000055469A1 Method and apparatus for underground drilling
09/21/2000WO2000055468A1 Directional drilling system for hard rock
09/21/2000WO2000055467A1 Method and apparatus for directional boring
09/21/2000CA2366115A1 Method and apparatus for directional boring
09/21/2000CA2365874A1 Directional drilling system for hard rock
09/20/2000EP1036914A1 Method for installing a number of risers or tendons and vessel for carrying out said method
09/20/2000CN1267353A Drilling system with means for anchoring in borehole
09/20/2000CN1266940A Rotary steering drilling system using hydraulic servo loop
09/19/2000US6119787 Auger planting tool
09/19/2000CA2184665C Shock tool for use in directional drilling
09/14/2000WO2000053887A2 Wellbore primary barrier and related systems
09/14/2000WO2000053883A1 Moulten bath drilling method
09/14/2000WO2000053882A1 Drill for making wide diameter and high depth holes and method for carrying out said holes
09/14/2000CA2365005A1 Drill for making wide diameter and high depth holes and method for carrying out said holes
09/13/2000EP1034354A1 Mill for use in a wellbore and method of milling
09/12/2000US6116356 Reaming apparatus and method with enhanced stability and transition from pilot hole to enlarged bore diameter
09/12/2000US6116355 Choke device
09/12/2000US6116354 Rotary steerable system for use in drilling deviated wells
09/12/2000US6116353 Method and apparatus for installing a micro-well with a penetrometer
09/11/2000CA2607070A1 Forming a wellbore casing while simultaneously drilling a wellbore
09/11/2000CA2606444A1 Forming a wellbore casing while simultaneously drilling a wellbore
09/11/2000CA2300363A1 Forming a wellbore casing while simultaneously drilling a wellbore
09/08/2000WO2000052294A2 Drill head for directional boring
09/07/2000DE19909836A1 Metallschmelze-Bohrverfahren Molten metal drilling
09/06/2000EP0528801B1 Pipe bursting and replacement apparatus and method
09/05/2000US6112836 Rotary drill bits employing tandem gage pad arrangement
09/05/2000US6112834 Blast hole drill including a slack take-up reel
09/05/2000US6112812 Wellbore milling method
08/2000
08/31/2000WO2000050797A1 Improved eduction process
08/31/2000WO2000050730A1 Device for simultaneously drilling and casing
08/31/2000WO2000050727A1 Horizontal drilling method and apparatus
08/31/2000DE19922813A1 Inserting and removing rod, e.g. in underground pipes, involves joining rod sections together or separating them by rotating about axis essentially perpendicular to axis of rod section
08/31/2000DE19859928C1 Verfahren und Schutzrohr zum Erneuern einer im Erdreich verlegten Rohrleitung Method and ducting for renewing a pipeline laid in the ground
08/31/2000DE10006459A1 Steuerung eines unterirdischen Objekts Control of an underground object
08/29/2000US6109836 Soil consolidation apparatus, tool and method
08/29/2000US6109832 Ram burster and method for installing tubular casing underground
08/29/2000US6109831 Underground boring and pipe installation
08/29/2000US6109828 Horizontal drilling method
08/29/2000US6109372 Rotary steerable well drilling system utilizing hydraulic servo-loop
08/29/2000US6109371 Method and apparatus for steering an earth boring tool
08/29/2000US6109370 System for directional control of drilling
08/29/2000US6109367 Apparatus and method for controlling an underground boring machine
08/29/2000US6109347 One-trip, thru-tubing, window-milling system
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