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)
12/2003
12/11/2003US20030226692 Leading body for ground drilling and ground drilling machine
12/11/2003US20030226691 Ground drilling machine
12/10/2003CN2591211Y Jet-flow hole-digging driller
12/10/2003CN2591210Y Light earthquake drilling machine
12/10/2003CN2591209Y Double-drive twisting mechanism for eccentric heel pipe drilling device
12/10/2003CN2591104Y Sleeve attaching rotary digging soil sampler
12/09/2003US6659203 Lockable motor assembly for use in a well bore
12/09/2003US6659202 Steerable fluid hammer
12/09/2003US6659201 Method and apparatus for directional actuation
12/09/2003US6659200 Actuator assembly and method for actuating downhole assembly
12/09/2003US6659182 Retrievable suction embedment chamber assembly
12/09/2003CA2207648C Method and apparatus for drilling with high-pressure, reduced solid content liquid
12/09/2003CA2197960C Method and apparatus for changing bits while drilling with a flexible shaft
12/04/2003WO2003100205A1 Method and dual reamer apparatus for forming bored hole
12/04/2003US20030221870 Earth loop heat exchange methods and systems
12/04/2003US20030221867 Method and apparatus for moving a mass
12/03/2003EP1366268A1 Jet cutting device with deflector
12/03/2003EP1366267A1 Rock drilling rig provided with a sound dampening casing
12/03/2003EP1117901B1 Method for controlling a horizontal drilling machine
12/02/2003US6655476 Earth boring bit
12/02/2003US6655474 Drill for making wide diameter and high depth holes and method for carrying out said holes
12/02/2003US6655460 Methods and apparatus to control downhole tools
12/02/2003CA2238628C Combination milling tool and drill bit
12/02/2003CA2231922C Downhole sub with kick pad for directional drilling
12/02/2003CA2142113C Method for completing multi-lateral wells and maintaining selective re-entry into laterals
12/02/2003CA2075900C Down-the-hole drill tool for drilling in advance of a casing tube
12/02/2003CA2036883C Drill head with integral impact hammers
11/2003
11/27/2003WO2003097989A1 Closed loop drilling assembly with electronics outside a non-rotating sleeve
11/27/2003WO2003097945A1 A device producing hammering
11/27/2003WO2003042486A3 Collapsible expansion cone
11/27/2003WO2003038227A3 Filter train for underground collecting mains and method for introducing said filter train into predetermined layers of soil
11/27/2003US20030217865 Bore lining and drilling
11/27/2003US20030217842 Method and system for accessing a subterranean zone from a limited surface area
11/26/2003CN2588038Y Enlarging bit for small borehole
11/26/2003CN1458383A Multifunctional drill machine and its construction method
11/25/2003US6652195 Method and apparatus for forming piles in place
11/25/2003US6652190 Method to install underground pipe casing
11/25/2003US6651754 Apparatus for moving earth boring machines
11/25/2003CA2225207C Single trip whipstock assembly
11/20/2003WO2003095791A1 Multilateral well drilling and reentry system and method
11/20/2003WO2003095787A2 Method and system for building modular structures from which oil and gas wells are drilled
11/20/2003WO2003095786A2 Method of and system for building structures and drilling oil and gas wells in arctic, inaccessible or environmentally sensitive locations
11/20/2003WO2002055331A3 Sectional drive system
11/20/2003US20030213599 Whipstock collet latch
11/20/2003US20030213590 Method and device for perforating a portion of casing in a reservoir
11/19/2003EP1362159A1 Shoe with earth formation disiplacing structure
11/19/2003EP1362158A1 Method and apparatus for operations in underground/subsea oil and gas wells
11/19/2003EP1153194B1 Automated bore planning method and apparatus for horizontal directional drilling
11/18/2003US6648081 Subsea wellbore drilling system for reducing bottom hole pressure
11/18/2003US6648069 Well reference apparatus and method
11/18/2003US6648068 One-trip milling system
11/13/2003WO2003093625A2 Underwater drilling rig
11/13/2003WO2003071084A3 System for forming a window and drilling a sidetrack wellbore
11/13/2003WO2003060284A3 Dual-member pipe driven power generator
11/13/2003US20030209363 Method of and system for building structures and drilling oil and gas wells in arctic, inaccessible or environmentally sensitive locations
11/12/2003EP1361333A2 Earth drilling device
11/12/2003EP1114237B1 Through-tubing retrievable whipstock system
11/12/2003EP1009912B1 Method of controlling rock drilling
11/12/2003CN1455074A Position-shifting diameter-changing stabilizer
11/11/2003US6644887 Device for connecting a towed pipe to a towing apparatus
11/11/2003US6644423 Wireline system for multiple direct push tool usage
11/11/2003CA2235204C Soil sampler for taking multiple soil samples from horizontal boreholes
11/06/2003WO2003091532A1 Drilling device for earth drill
11/06/2003WO2002042605A9 Method of and system for controlling directional drilling
11/06/2003US20030205410 Remote control for a drilling machine
11/06/2003US20030205409 Apparatus and method for maintaining control of a drilling machine
11/06/2003US20030205395 Hydraulic arm and attachments for tractors
11/06/2003US20030205374 One trip through tubing window milling apparatus and method
11/05/2003EP1038087B1 Assembly and process for drilling and completing multiple wells
11/05/2003EP1027519A4 Apparatus for directional drilling
11/05/2003EP0843774B1 Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting
11/05/2003CN2584796Y Chassis for mountnig dill rig, workover rig on truck
11/05/2003CN1453450A No-opencut directionally-drilling and pipe-laying rig capable of being used horizontally and obliquely
11/04/2003US6640910 Long gauge roller vane drilling motor
11/04/2003US6640909 Steerable rotary drilling device
11/04/2003US6640903 Forming a wellbore casing while simultaneously drilling a wellbore
11/04/2003CA2307514C Piston actuator assembly for an orienting device
11/04/2003CA2285194C Window assembly for multiple wellbore completions
10/2003
10/30/2003WO2003089756A1 Methods for increasing production from a wellbore
10/30/2003WO2003050376A3 Burst qam downhole telemetry system
10/30/2003WO2003038231A3 Drilling vehicle with support bearing
10/29/2003EP1357252A1 Method and apparatus for installing a duct around an existing longitudinal member
10/29/2003EP1356224A1 Bundle of pipes and method for parallel arrangement of pipes according to a bore and swivel method
10/29/2003CN2583345Y Crawler-type spinning hole drilling machine with upright column capable of rising and falling
10/29/2003CN1451839A Hydraulic drill bit capable of remote controlling drilling, slotting and deflection correction
10/29/2003CN1125915C High pressure water jet controllable spin drill bit unit
10/28/2003US6637525 Ground drilling machine and rod exchanger utilized therefor
10/23/2003WO2003087525A1 A one trip drilling and casing cementing method
10/23/2003WO2003087524A1 Whipstock assembly and method of manufacture
10/23/2003WO2003087522A2 Nozzle for jet drilling and associated method
10/23/2003WO2003086042A2 Method of cleaning hole diggers and spot cultivators and hole digger cleaning device
10/23/2003US20030198518 Method and apparatus for installing a duct around a longitunal member present at the stretch of installation
10/23/2003US20030197509 Bore location system
10/23/2003US20030196819 Orienting whipstock seat, and method for seating a whipstock
10/23/2003US20030196817 Methods for increasing production from a wellbore
10/23/2003US20030196807 One trip through tubing window milling apparatus and method
10/22/2003EP1354124A1 Method and system for enhanced access to a subterranean zone
10/22/2003EP1354121A1 Method and device for boring holes in the floor or in rock
10/22/2003EP1354120A1 Directional drilling apparatus
10/22/2003EP1354118A2 Backreamer
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