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)
03/2003
03/25/2003US6536539 Shallow depth, coiled tubing horizontal drilling system
03/25/2003US6536525 Methods and apparatus for forming a lateral wellbore
03/25/2003CA2235196C Method for taking a soil sample from a horizontal borehole
03/20/2003WO2002053866A3 Device and method for changing lines
03/20/2003WO2002025061A9 Apparatus for drilling large bore holes in rock and soil
03/20/2003US20030052529 Arrangement for determining position of unmanned mining vehicles
03/20/2003US20030051919 Three-dimensional steering tool for controlled downhole extended-reach directional drilling
03/20/2003US20030051916 Method of drilling, analyzing and stabilizing a terrestrial or other planetary subsurface formation
03/20/2003US20030051889 Control system for a percussion drive
03/20/2003US20030051888 Hydraulic drilling rig
03/20/2003US20030051880 Method and apparatus for drilling a plurality of offshore underwater wells
03/20/2003US20030051878 Horizontal spool tree wellhead system and method
03/20/2003DE20215147U1 Pilot hole cutter for small bore tunnel has hydraulic jet cutting head
03/19/2003EP1293641A1 Apparatus for setting a sidetrack plug in a well bore
03/19/2003EP1292757A1 System for creating a conduit in a borehole formed in an earth formation
03/19/2003EP1099072B1 Method and device for laying an underground duct made of a plastic material
03/18/2003US6533052 Drill bit for impact-assisted directional boring
03/18/2003US6533048 Earth boring bit
03/18/2003US6533045 Portable drilling rig
03/18/2003US6533040 Multi-function apparatus for adding a branch well sealed liner and connector to an existing cased well at low cost
03/13/2003WO2003021073A2 Method and apparatus for replacement of underground pipe
03/13/2003US20030047622 Cavitating jet
03/13/2003US20030047359 Drilling tool for producing geotechnical bores
03/13/2003US20030047334 Rock drilling rig
03/13/2003CA2458923A1 Method and apparatus for replacement of underground pipe
03/12/2003EP1291488A1 Drilling apparatus for making geotechnical boreholes
03/12/2003CN2539831Y Telescopic three-section derrick for truck-mounted drilling and repairing equipment
03/12/2003CN1401880A Drill bit advancing direction predicting method, controlling method and controlling system for horizontal well
03/12/2003CN1401878A Automatic perpendicular drilling tool
03/11/2003US6530439 Flexible hose with thrusters for horizontal well drilling
03/11/2003US6530154 Method to detect deviations from a wellplan while drilling in the presence of magnetic interference
03/06/2003WO2003018953A1 Orienting whipstock seat, and method for seating a whipstock
03/06/2003WO2002099241A3 Method and apparatus for determining drilling paths to directional targets
03/06/2003WO2002068797B1 Oscillating shear valve for mud pulse telemetry
03/06/2003WO2002052121A3 Flightless rock auger for use with pressure drills with quick attachment and method of use
03/06/2003US20030044238 Method and apparatus for replacement of underground pipe
03/06/2003US20030044237 Trenchless water pipe replacement device and method
03/06/2003US20030042024 Methods and associated apparatus for drilling and completing a wellbore junction
03/05/2003EP1287228A1 Wellbore liner system
03/05/2003CN2538851Y Device for forming special shaped pile by drilling high-pressure jetting reaming and pressure concreting
03/05/2003CN1400377A Method for defining serious sand sedimentation section in drilling process and its equipment
03/04/2003US6527512 Mud motor
03/04/2003US6527063 Directional boring device
03/04/2003US6527049 Apparatus and method for isolating a section of tubing
03/04/2003US6526818 Seabed analysis
02/2003
02/27/2003WO2003016671A2 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles
02/27/2003WO2003006778A8 Drilling system and method for controlling equivalent circulating density during drilling of wellbores
02/27/2003US20030038526 Method and system for mining hydrocarbon-containing materials
02/27/2003US20030037940 Excavation apparatus
02/27/2003US20030037930 Orienting whipstock seat, and method for seating a whipstock
02/27/2003US20030037640 Polycrystalline diamond partially depleted of catalyzing material
02/27/2003CA2454865A1 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles
02/26/2003EP0934483B1 Hose supporting arrangement for actuators of rock drill apparatus
02/26/2003EP0792407B1 Single-wire guidance system for drilling boreholes
02/26/2003EP0646213B2 Process and tool for laying underground collector mains for liquids and gases
02/25/2003US6524031 Device and method for trenchless replacement of underground pipe
02/25/2003US6523624 Sectional drive system
02/25/2003US6523623 Method and apparatus for determining drilling paths to directional targets
02/25/2003CA2238782C Method and apparatus for radially drilling through well casing and formation
02/20/2003WO2002070857B1 Improved mud motor
02/20/2003US20030035958 Polycrystalline diamond partially depleted of catalyzing material
02/20/2003US20030035957 Polycrystalline diamond partially depleted of catalyzing material
02/20/2003US20030034182 Polycrystalline diamond partially depleted of catalyzing material
02/20/2003US20030034178 Drilling direction control device
02/20/2003US20030034177 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles
02/20/2003US20030034156 Multi-function apparatus for adding a branch well sealed liner and connector to an existing cased well at low cost
02/18/2003CA2250769C Downhole electrode for well guidance system
02/13/2003WO2003012248A2 Pipe feed
02/13/2003WO2002044508A3 Pneumatic rock-boring device and method for horizontal drilling using compressed air and drilling medium
02/13/2003US20030029620 Foundation for suction in installation of conductor casing
02/12/2003EP1210497A4 Bit connector
02/12/2003EP1088151B1 Downhole milling device
02/12/2003EP1070194B1 A mill and a method for milling
02/12/2003CN2535541Y Inclined-drill-bit type rotary-guiding tool
02/12/2003CN1396344A Apparatus for squeezing earth to enlarge hole and its technology
02/11/2003US6517291 Riser tensioning construction
02/11/2003US6516902 Directional drilling system
02/11/2003US6516901 Adjustable orienting sub
02/11/2003US6516900 Apparatus for directional drilling
02/11/2003US6516899 Method and apparatus for directional boring under mixed conditions
02/06/2003WO2003010414A1 Expander for expanding a tubular element
02/06/2003WO2003010409A1 Drilling tool
02/06/2003US20030024742 Steerable downhole tools
02/06/2003US20030024741 Drill bit and method for directional drilling in cobble formations
02/06/2003US20030024739 Method and apparatus for directional boring under mixed conditions
02/06/2003US20030024738 Method and apparatus for determining drilling paths to directional targets
02/06/2003US20030024708 Structral support
02/06/2003DE10164648C1 Computer-controlled melting probe for detecting different measurement parameters in an area of ice has a melting head, a vertical control tube and sensors with very small recording areas for obtaining good local definition
02/05/2003EP1076754B1 Pneumatic submersible boring tool
02/05/2003CN1395022A Ground remote control adjustable bent sub
02/04/2003USRE37975 Directional boring head with blade assembly
02/04/2003US6513606 Self-controlled directional drilling systems and methods
01/2003
01/30/2003WO2003008755A2 Wear resistant tubular connection
01/30/2003WO2003008754A1 Steerable rotary drill bit assembly with pilot bit
01/30/2003US20030021995 Applying an aqueous slurry comprising lithium silicate, sodium silicate, potassium silicate, zirconia powder, a fibrous agent, and a magnetic powder to a surface, drying, heat curing
01/30/2003US20030019638 Procedures and equipment for profiling and jointing of pipes
01/30/2003US20030019637 Method for preparing casing for use in a wellbore
01/29/2003EP1279793A1 Drill head
01/29/2003EP1278932A1 Apparatus and methods for forming a lateral wellbore
01/28/2003US6510907 Abrasive jet drilling assembly
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