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)
11/1998
11/04/1998EP0581838B1 Engine for performing subsea operations and use of it in a core sampler
11/03/1998US5831185 Method and apparatus for collecting samples of earth materials
11/03/1998US5829531 Mechanical set anchor with slips pocket
11/03/1998US5829518 Mill guide and anchor assembly for subterranean well casings
11/03/1998CA2151215C Whipstock and staged sidetrack mill
11/03/1998CA2145284C Drilling apparatus
11/02/1998CA2236490A1 Device for widening an earth borehole
10/1998
10/29/1998WO1998048141A1 Downhole apparatus
10/29/1998DE19817000A1 Underground pipeline with external lubricant feed to reduce friction with ground
10/28/1998EP0874128A2 Rotary drill bit having movable formation-engaging members
10/28/1998EP0874126A1 Method and device for drilling by use of simultaneous percussion and rotation
10/28/1998EP0873465A1 Trenchless underground boring system with boring tool location
10/28/1998CN1197175A Replacing construction method and appts. for pipe
10/28/1998CN1197151A Boring pile shaping method and its appts.
10/27/1998US5826651 Wellbore single trip milling
10/22/1998WO1998046854A1 Side pocket mandrel for a measuring instrument
10/22/1998WO1998046833A1 Position penetrated anchor system
10/22/1998DE19729882C1 Drilling for cast-in-situ pile
10/21/1998EP0872679A1 Method for replacement of existing pipes and devices for carrying out the method
10/21/1998EP0872626A2 Method and apparatus for locating indexing systems in a cased well and conducting multilateral branch operations
10/21/1998EP0839297A4 Method for replacing buried pipe
10/21/1998EP0765430A4 Soil sampler
10/21/1998EP0760895B1 Lateral drilling method
10/15/1998WO1998045571A1 Window assembly for multiple wellbore completions
10/15/1998WO1998045570A1 Method and apparatus for deploying a well tool into a lateral wellbore
10/15/1998WO1998045568A2 Whipstock and installing and retrieving tools
10/14/1998EP0870971A1 Cable pulling device for a pipe laid in the ground
10/14/1998EP0870151A1 Method and apparatus for removal of utility line and replacement with polyolefin pipe
10/14/1998EP0870092A1 Method and apparatus for forming piles in-situ
10/13/1998US5819859 Apparatus and method for detecting an underground structure
10/11/1998CA2234745A1 Underground mining drill rig
10/11/1998CA2234288A1 Device for pulling a pull wire in an underground conduit
10/08/1998DE19713737A1 Method of discharging earth's core from pipe
10/07/1998EP0869308A2 Device for pulling a pipe into a borehole
10/07/1998CN1195065A Method and apparatus for drilling and re-entering multiple lateral branches in well
10/06/1998US5816745 Apparatus for replacing old underground pipes
10/06/1998US5816345 Bore hole support system
10/06/1998US5816324 Whipstock accelerator ramp
10/01/1998WO1998042944A1 Apparatus and a method for drilling boreholes
10/01/1998WO1998032951A3 Method and device for driving bore-holes, especially in the sea bed, using a guide tip
10/01/1998WO1998026151A3 Method and device for driving bore holes, specially exploring and extraction drillings in the sea bottom
10/01/1998CA2255750A1 Apparatus and a method for drilling boreholes
09/1998
09/30/1998EP0866910A1 Apparatus and method for forming a window or an outline thereof in the casing of a cased wellbore
09/30/1998CN1194679A Multi-activity offshore exploration and/or development drilling method and apparatus
09/29/1998USRE35912 Method of installing lean-to well protector
09/29/1998US5813484 Casing tube with casing shoe
09/29/1998US5813482 Earth boring system and apparatus
09/29/1998US5813481 System for in situ replacement of cutting means for a ground drill
09/29/1998US5813465 Apparatus for completing a subterranean well and associated methods of using same
09/24/1998DE19711190A1 Method for installing underground pipes in accordance with wash boring technique
09/23/1998EP0865561A1 Reaming apparatus with enhanced stability and transition from pilot hole to enlarged bore diameter
09/22/1998US5812068 Drilling system with downhole apparatus for determining parameters of interest and for adjusting drilling direction in response thereto
09/22/1998US5810101 Horizontal drilling machine
09/22/1998US5810086 Single riser with two wellheads
09/16/1998EP0864727A2 Method and device for taking samples of soil
09/15/1998US5806616 Arrangement in a rock drilling equipment
09/15/1998US5806614 Apparatus and method for drilling lateral wells
09/15/1998US5806600 Whipstock system
09/15/1998US5806596 One-trip whipstock setting and squeezing method
09/15/1998US5806595 Wellbore milling system and method
09/15/1998CA2115682C Spiral flights for improved soil mixing and efficient boring for use on multi-shaft auger soil mixing apparatus
09/11/1998WO1998039550A1 Structure for the production of oil and/or gas at sea
09/11/1998WO1998031915A3 Apparatus for directing and steering the foremost part of a drillpipe at drillings
09/09/1998CN1192796A Adjustable stablizer for directional drilling
09/08/1998US5803666 Support system for supporting a horizontal bore hole
09/08/1998US5803550 Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting
09/08/1998US5803189 Directional boring machine
09/08/1998US5803185 Steerable rotary drilling systems and method of operating such systems
09/08/1998US5803176 Sidetracking operations
09/02/1998EP0861967A2 Mobile working apparatus
09/02/1998EP0861966A2 Apparatus and method for forming ducts and passageways
09/02/1998CN2289873Y Set type reciprocating water injection pump head
09/01/1998US5800096 Subsurface barrier wall and method of installation
09/01/1998US5799740 Directional boring head with blade assembly
09/01/1998US5799738 Doweling hole drilling machine
09/01/1998CA2129835C Template and process for drillng and completing multiple wells
08/1998
08/27/1998WO1998037301A1 Subsurface probe system for chemical and mineral exploration
08/27/1998WO1998037300A1 Bottomhole assembly and methods of use
08/27/1998WO1998022689A3 Whipstock
08/27/1998DE19756421A1 Trench-less pipeline laying method
08/27/1998CA2578726A1 Bottom hole assembly and methods of use
08/27/1998CA2253227A1 Subsurface probe system for chemical and mineral exploration
08/26/1998EP0860638A1 Device and process of laying ceramic tubes without excavation
08/26/1998CN1191587A Method and apparatus for blasting hard rock
08/26/1998CN1191586A Apparatus and process for drilling and completing multiple wells
08/25/1998US5797705 Method for manufacturing a tubular foundation in the ground
08/25/1998US5797465 Multi-shaft drilling unit
08/25/1998CA2068005C Drilling apparatus
08/20/1998DE19705566A1 Pipe laying equipment for replacing steel pipelines with plastic, avoiding trenching
08/19/1998EP0859124A2 Method and apparatus for completing wells with lateral branches
08/19/1998EP0859122A2 Method and apparatus for completing wells with lateral branches
08/19/1998EP0859120A2 Method and apparatus for completing wells with lateral branches
08/19/1998EP0859119A2 Template and process for drilling and completing multiple wells
08/18/1998US5796174 Device for controlling breaker in construction vehicles
08/18/1998US5795991 Drilling apparatus
08/18/1998US5794729 Coker unit drilling equipment
08/18/1998US5794719 Ground boring apparatus
08/18/1998US5794716 Vibratory systems for driving elongate members into the earth in inaccessible areas
08/18/1998US5794696 From a well borehole
08/13/1998DE19704263C1 Earth drilling machine
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