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)
12/1996
12/04/1996EP0745528A2 Universal construction apparatus
12/04/1996EP0745175A1 Process for removing the core of earth from a pipe laid without excavation and scraper for implementing said process
12/03/1996USRE35386 Method for drilling directional wells
12/03/1996US5580188 Method for replacing buried pipe
12/03/1996US5579829 Keyless latch for orienting and anchoring downhole tools
12/03/1996CA2102760C Underground horizontal pipe installation method and apparatus
11/1996
11/28/1996WO1996037678A1 Locating a discrete in-ground boring device
11/28/1996DE19519993A1 Geothermal probe
11/28/1996DE19518820A1 Drill for wide-bore holing in waterbearing ground
11/28/1996DE19518380A1 Drilling core catcher, preventing hazardous release of large core samples
11/27/1996EP0744527A1 Method and apparatus for the transmission of information to a downhole receiver.
11/27/1996EP0744526A1 Method for controlling a drilling tool
11/27/1996CN2241223Y Borehole enlarging machine
11/27/1996CN2241222Y Drill-reaming type window milling bit
11/27/1996CN2241221Y Hydraulic whipstock
11/26/1996US5578769 Methods and apparatus for undisturbed subsurface soil chemistry sampling
11/21/1996WO1996036788A1 Adjustable stabilizer for directional drilling
11/20/1996EP0643794B1 Method of creating a wellbore in an underground formation
11/20/1996CN2240605Y Planetary type large diameter engineering drill
11/20/1996CN1136128A Apparatus and method for combining two sets of drilling tools
11/20/1996CN1136127A Radial drilling and well-building method from the main well
11/20/1996CN1136126A Borehole boring method and machine
11/19/1996US5575743 Method and apparatus for exercising adductor muscles
11/19/1996US5575345 Multi shaft drilling unit
11/19/1996US5575343 Drilling a bore hole having a short radius curved section followed by a straight section
11/13/1996EP0674744B1 Assembly and process for drilling and completing multiple wells
11/12/1996US5573307 Method and apparatus for blasting hard rock
11/12/1996CA2110659C Viscid oil well completion
11/12/1996CA2021773C Shield tunnelling machine
11/06/1996EP0741227A2 Borehole boring method and machine
11/06/1996EP0740756A1 Device for use in replacing sewage piping
11/06/1996EP0740737A1 Method and apparatus for plasma blasting
11/05/1996US5572318 Lead pipe configuration for underground pipe laying
11/05/1996US5570934 Traction boring device using multiple trepans for producing large cuts in concrete works and the like and method of producing cuts
11/05/1996US5570748 Drill bit for geological exploration
11/05/1996US5570747 Drive point device
10/1996
10/31/1996WO1996034225A1 Method and apparatus for removal of utility line and replacement with polyolefin pipe
10/31/1996WO1996034172A1 Method and tool for use in commencing the drilling of a deviated well
10/31/1996DE19608932A1 System for measuring load-deformation characteristics of loose stone and landfill
10/31/1996DE19533765C1 Boring hard rocks e.g. granite by hydrogen and fluorine combustion avoiding pollution
10/30/1996EP0740046A2 Steering device for drilling heads
10/30/1996EP0558567B1 A method for aligning a feeding beam in a rock drilling equipment and a rock drilling equipment and a measuring device
10/24/1996WO1996033337A1 A hydraulic arrangement for turning the actuator of a rock drilling machine
10/24/1996WO1996033335A2 Displaceable working apparatus with extensible boom
10/24/1996CA2217578A1 Displaceable working apparatus with extensible boom
10/23/1996EP0738366A1 Method of creating a borehole in an earth formation
10/23/1996EP0738355A1 Improvements in or relating to apparatus for use in forming piles
10/23/1996CN1133926A Devices and method to stop water inflow to underground pipe laying work area
10/22/1996US5566763 Decentralizing, centralizing, locating and orienting subsystems and methods for subterranean multilateral well drilling and completion
10/22/1996US5566762 Thru tubing tool and method
10/22/1996US5566757 Method and apparatus for setting sidetrack plugs in open or cased well bores
10/17/1996WO1996032565A1 Method and apparatus for drilling multiple offshore wells from within a single conductor string
10/16/1996EP0737783A2 A casing for use in excavation of a borehole
10/16/1996EP0737268A1 Control device for drilling a bore hole
10/15/1996US5564503 Methods and systems for subterranean multilateral well drilling and completion
10/10/1996WO1996031679A1 A surface controlled wellbore directional steering tool
10/10/1996DE19512123A1 Boring system for underground pipeline
10/10/1996DE19512109A1 Drilling rig mounted on tractor unit with compact drive head arrangement
10/08/1996US5562169 Sonic Drilling method and apparatus
10/03/1996WO1996030690A1 Process and device for pulling a pipe laid or to be laid in the ground
10/03/1996WO1996030623A1 Milling tool, whipstock, milling system and method of forming a window in the wall of a tubular
10/03/1996WO1996030622A1 Whipstock
10/03/1996WO1996030619A1 Pressure converter (b)
10/03/1996WO1996030618A1 Pressure converter (a)
10/03/1996WO1996030617A1 A method and a device for directional drilling
10/03/1996WO1996030616A1 Device for controlling the drilling direction of drill bit
10/03/1996WO1996030161A1 Gate driver
10/03/1996CA2480707A1 Hydrocarbon production using multilateral well bores
10/03/1996CA2480703A1 Hydrocarbon production using multilateral well bores
10/03/1996CA2216916A1 Pressure converter (b)
10/03/1996CA2216784A1 A method and a device for directional drilling
10/03/1996CA2216556A1 Pressure converter (a)
10/03/1996CA2215169A1 Process and device for pulling a pipe laid or to be laid in the ground
10/02/1996EP0735303A1 Process for laying underground pipes between control chambers
10/02/1996EP0735236A1 Assembly and process for drilling and completing multiple wells
10/02/1996EP0735231A2 Device for driving pipes, for enlarging pilot boreholes or for replacement of buried pipelines
10/02/1996DE19524389C1 Self-propelled vertical and horizontal drilling equipment
10/02/1996DE19513181A1 Verfahren und Vorrichtung zum Ziehen eines im Erdreich verlegten oder zu verlegenden Rohres Method and device for pulling a laid in the ground or pipe to be laid
10/02/1996DE19512070A1 Mobile drilling rig with interconnecting drive heads
10/01/1996US5560435 Method and apparatus for drilling multiple offshore wells from within a single conductor string
10/01/1996CA2035702C Ultrasonically generated cavitating or interrupted jet
09/1996
09/26/1996WO1996029535A1 Corrosion protection for steel pipes
09/26/1996WO1996029505A1 Tunnel excavator
09/26/1996WO1996029503A1 An arrangement in a feed beam of a rock drill
09/26/1996DE19530718C1 Boring device and method for producing concrete post in bore hole
09/25/1996EP0733775A2 Method and apparatus for setting a sidetrack plug in a well bore
09/25/1996EP0572475B1 Drill head with integral impact hammers
09/25/1996EP0327598B1 Fusion-drilling process
09/25/1996CA2164773A1 Whipstock and starter mill
09/24/1996US5558169 Truck mounted work implement
09/19/1996WO1996028635A1 Improved casing shoe
09/19/1996WO1996028631A1 Traction boring device using multiple trepans for producing large cuts in concrete works and the like and method of producing cuts
09/19/1996WO1996028630A1 Hydraulic tubing machine as an attachment for a mobile rotary boring installation
09/19/1996DE19529617C1 Rotary drilling bucket with cylindrical steel container
09/19/1996DE19509782A1 Korrosionsschutz für Stahlrohre Corrosion protection for steel tubes
09/19/1996DE19509379A1 Hydraulische Verrohrungsmaschine als Anbaugerät für eine mobile Drehbohranlage Hydraulic piping machine as attachment for a mobile drilling rig
09/19/1996DE19504484C1 Equipment for removing earth around buried cables or empty pipes
09/18/1996CN2235497Y Device for forcing casing into borehole for quick drilling
09/17/1996US5555947 Mole launcher and a method of operating a mole launcher
09/17/1996US5555946 Method and tool for use in commmencing the drilling of a deviated well
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