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)
08/2000
08/29/2000US6109305 Double walled pipe, jacking method and pipe end structure of leading pipe
08/24/2000DE19906687A1 Drill has gear housing, drive motor, inner and outer pipe, gears, hollow shafts, and intermediate flanges
08/23/2000EP1029151A1 Method and device for crushing rock
08/23/2000EP0904478B1 Drilling apparatus
08/23/2000CN1264452A Directional drilling apparatus
08/23/2000CN1263977A Rotation steerable drilling system using sliding sleeve
08/22/2000US6106200 Process and device for simultaneously drilling and lining a hole
08/22/2000US6105675 Downhole window milling apparatus and method for using the same
08/18/2000CA2299108A1 Method and apparatus for jet drilling drainholes from wells
08/17/2000WO2000047861A2 Hydraulic underreamer and sections for use therein
08/17/2000WO2000047860A2 Directional drilling apparatus
08/17/2000WO2000047826A1 Short aggregate pier techniques
08/17/2000CA2359642A1 Short aggregate pier techniques
08/16/2000EP1028226A2 Method and device for constructing an underground tunnel
08/16/2000EP1027519A1 Apparatus for directional drilling
08/15/2000US6102137 Apparatus and method for forming ducts and passageways
08/15/2000US6102123 One trip milling system
08/15/2000US6102119 Method for installing tubular members axially into an over-pressured region of the earth
08/15/2000CA2154135C Downhole sub for directional drilling
08/10/2000DE19904864A1 Earth boring apparatus has hose for compressed air feed to impact piston moving backwards and forwards with support corset locating on hose wall
08/09/2000EP1025336A1 Method and apparatus for attaching a casing to a drill bit in overburden drilling equipment
08/09/2000EP1025334A2 Directional drilling tool
08/09/2000EP1025333A4 Single riser with two wellheads
08/09/2000EP1025333A1 Single riser with two wellheads
08/09/2000CN2391001Y Whipstock for horizontal well drilling
08/08/2000US6098708 Apparatus for pulling a pipe into an earth bore
08/02/2000EP1024245A2 Controllable stabiliser
08/01/2000US6095263 Drill rig operator cab viewport
08/01/2000US6095248 Method and apparatus for remote control of a tubing exit sleeve
07/2000
07/29/2000CA2297595A1 Flexible swage
07/25/2000US6092610 Actively controlled rotary steerable system and method for drilling wells
07/25/2000US6092601 Apparatus for completing a subterranean well and associated methods of using same
07/25/2000US6092593 Apparatus and methods for deploying tools in multilateral wells
07/25/2000US6092553 Method of installing re-placement pipe
07/25/2000CA2248563C Feed shell positioning mechanism
07/21/2000CA2297136A1 One-trip window milling apparatus & method with measurement-while-drilling
07/20/2000WO2000042288A1 Method and apparatus for forcing an object through the sidewall of a borehole
07/20/2000WO2000042287A1 Automated bore planning method and apparatus for horizontal directional drilling
07/20/2000WO2000003600A3 Improved tubing handling for subsea oilfield tubing operations
07/20/2000DE19901536A1 Trench free parallel pipe laying method for defined horizontal or vertical spacing, involves execution of pilot hole along line and creation of two subterranean tunnels by two boring machines from exit to entry
07/20/2000CA2361240A1 Automated bore planning method and apparatus for horizontal directional drilling
07/19/2000EP1020615A2 Feeding method for laying underground pipes and pipe for carrying out this method
07/19/2000CN2388337Y Radial horizontal drilling steering device
07/19/2000CN1260857A Earth formation surveying device
07/18/2000US6089332 Steerable rotary drilling systems
07/18/2000US6089320 Apparatus and method for lateral wellbore completion
07/18/2000US6089319 Whipstock
07/12/2000CN1054416C Omnibearing hydraulic jumbolter
07/11/2000US6086050 Apparatus for pulling a traction cable through an underground pipe
07/11/2000US6085851 Multi-activity offshore exploration and/or development drill method and apparatus
07/06/2000WO2000039412A2 A casing for noise attenuation in a rock drilling rig and an arrangement in conjunction with a rock drilling rig
07/06/2000DE19920395C1 Equipment for widening earth holes and/or for destruction of pipe conduits laid in earth together with laying new pipe conduits
07/06/2000DE19860259A1 Advance feed pipe conduit
07/06/2000DE19859367A1 Cavity drilling machine, for sinking bores or laying pipes in soil, has articulated part, fixed compressed gas line and rotatable cover secured to housing
07/05/2000EP1015728A1 Bottomhole assembly orienting sub
07/05/2000CN2386177Y Cable side-enter device for directional drilling measuring
07/05/2000CN1259188A An erectable arm assembly for use in boreholes
07/04/2000US6082472 Earth displacement drill
07/04/2000US6082471 Horizontal boring apparatus used to install a pipeline
07/04/2000US6082470 Directional drilling system and apparatus
07/04/2000US6082469 Doweling hole drilling machine
07/04/2000US6082453 Orientation device, particularly for drilling tool or a well equipment
07/04/2000CA2142001C Mixed well stream drive drainage process
06/2000
06/29/2000WO2000037772A1 Tubing anchor
06/29/2000WO2000037771A1 Drilling method
06/29/2000WO2000037768A1 Method and apparatus for expanding a liner patch
06/29/2000WO2000037767A2 Profile formation
06/29/2000WO2000037766A2 Procedures and equipment for profiling and jointing of pipes
06/29/2000WO2000037764A2 Improved steerable drilling system and method
06/29/2000CA2686423A1 Method and apparatus for drilling and lining a wellbore
06/29/2000CA2646563A1 Tubing anchor
06/28/2000EP1013874A2 Device and method for the replacement of tubes
06/28/2000EP1012440A1 Boring device
06/28/2000EP1012436A1 Drilling tool for down-the-hole drilling, reamer means and body element for use in the tool
06/27/2000US6079506 Boring tool control using remote locator
06/27/2000US6079504 Underground mining drill rig with safety interlock
06/27/2000US6079495 Method for establishing branch wells at a node of a parent well
06/27/2000CA2195002C Method for steering a drill bit while drilling a bore hole
06/27/2000CA2006939C Controlled path drill tool equipped with a variable geometry stabilizer and utilisation of said tool
06/22/2000WO2000036265A1 Stabilized downhole drilling motor
06/22/2000WO2000036263A1 Downhole mud motor transmission
06/21/2000EP1010854A1 Drilling machine
06/21/2000EP1010816A1 Mobile work apparatus
06/21/2000EP1009912A1 Method of controlling rock drilling
06/21/2000EP0815344B1 Whipstock
06/20/2000US6076618 Rock drilling tool with radially extendable two-piece reamer
06/20/2000US6076617 Auger apparatus
06/20/2000US6076615 Multi-linked working boom for working machine
06/20/2000US6076606 Through-tubing retrievable whipstock system
06/20/2000US6076602 Apparatus for completing a subterranean well and associated methods of using same
06/18/2000CA2686627A1 Electrically sequenced tractor
06/15/2000WO2000034623A1 Method and rock drilling apparatus for controlling rock drilling
06/15/2000WO2000034617A1 Method for correcting positioning errors in rock drilling, and a rock drilling equipment
06/15/2000WO2000034616A1 Apparatus for directional drilling
06/15/2000DE19919555C1 Extraction of geothermal energy from blind bores involves closed circuit feed of heat transmission medium with first chamber in heat exchanger tube for feed of cold fluid
06/14/2000EP1008717A1 Rotary steerable well drilling system utilizing sliding sleeve
06/13/2000US6074153 Drill rods feeding device
06/13/2000US6073708 Downhole mud pressure intensifier
06/13/2000US6073707 Downhole sub with kick pad for directional drilling
06/13/2000US6073697 Lateral wellbore junction having displaceable casing blocking member
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