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)
05/2003
05/02/2003EP1306516A1 Drilling and pressing tool
05/02/2003EP1305499A1 Method and apparatus for placing and interrogating downhole sensors
05/02/2003EP1305498A2 Drilling and lining method using a spoolable tubing
05/02/2003EP1012440B1 Boring device
05/01/2003WO2003036042A1 Method of monitoring a drilling path
05/01/2003WO2003036025A1 System for lining a section of a wellbore
05/01/2003US20030079915 Device for drilling, in particular percussion drilling or rotary percussion drilling, boreholes
05/01/2003US20030079913 Apparatus and method for drilling and reaming a borehole
04/2003
04/30/2003CN1415044A Integrated transmitter surveying while boring (SWB) entrenching powering device for continuation of guided bore hole
04/30/2003CN1414207A Oil field branching well reentry device
04/29/2003US6554368 Method and system for mining hydrocarbon-containing materials
04/29/2003US6554083 Adjustable bent housing sub for a mud motor
04/29/2003US6554082 Apparatus and method for controlling an underground boring machine
04/29/2003US6554063 Apparatus for establishing branch wells from a parent well
04/29/2003US6554062 Anchor apparatus and method
04/24/2003WO2003033952A1 Method and apparatus for installing a pipe
04/24/2003WO2003033874A1 Rock drilling apparatus and rock breaking machine
04/24/2003WO2003033873A1 Method and arrangement of controlling of percussive drilling based on the stress level determined from the measured feed rate
04/24/2003WO2003033863A1 Early hydrocarbon production system
04/24/2003WO2003033859A1 Methods and apparatus to control downhole tools
04/24/2003US20030077124 Rock drilling rig
04/24/2003US20030075361 Well system
04/24/2003US20030075334 Wellbore liner system
04/24/2003US20030075319 Auto-extending/retracting electrically isolated conductors in a segmented drill string
04/24/2003US20030074809 Nozzle mount for soft excavation
04/24/2003CA2643187A1 Methods and apparatus to control downhole tools
04/23/2003EP0920567B1 Rock drilling rig
04/23/2003EP0842345B1 Drilling method and casing shoe
04/23/2003CN2546612Y Underground pupa moving drilling machine
04/23/2003CN1413286A Subsea well intervention vessel
04/23/2003CN1413285A Three dimensional steerable system
04/22/2003US6552548 Detecting underground objects
04/22/2003US6550818 Bent sub assembly for directional drilling
04/22/2003US6550553 Boring apparatus
04/22/2003US6550551 Apparatus to actuate a downhole tool
04/22/2003US6550550 Downhole drilling apparatus
04/22/2003US6550548 Rotary steering tool system for directional drilling
04/22/2003CA2090351C Methods and apparatus for removing debris from a well bore
04/17/2003WO2003031767A1 Wellbore recovery operation
04/17/2003WO2003031764A1 Multi-functional drilling vehicle
04/17/2003WO2003031762A1 Method of forming a trenchless flowline
04/17/2003WO2002055792A9 Method and apparatus for vibratory kinetic energy generation and application thereof
04/17/2003US20030070845 Earth boring bit
04/17/2003US20030070844 Calculating directional drilling tool face offsets
04/17/2003US20030070842 Methods and apparatus to control downhole tools
04/17/2003US20030070841 Shallow depth, coiled tubing horizontal drilling system
04/17/2003US20030070840 Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications
04/17/2003US20030070801 Small tubular window system
04/17/2003DE20218713U1 Device for permitting exchange of electrical conductors in the earth has bore head to displace earth around conductor
04/17/2003DE10205124C1 Extraction machine, for digging out hard rock e.g. platinum ore, has an eccentric shaft through a sleeve supported in a housing, as the drive for a cycloid gear to power the cutters
04/16/2003EP1302622A2 Fulcrum bearing assembly and bearing pre-load assembly for a steerable rotary drilling device
04/16/2003EP0958446B1 Method and device for driving bore-holes, specially for prospection and extraction drillings
04/16/2003EP0874946B1 Arrangement for leading flexible elements to a rock drill, and a hose reel structure
04/16/2003CN2545352Y Rotary guide for drilling
04/16/2003CN2545351Y Counterclockwise drilling tool assembly
04/15/2003US6547006 Wellbore liner system
04/10/2003WO2003029603A1 Wellbore system for simultaneous drilling and production
04/10/2003US20030066686 Interconnected, rolling rig and oilfield building(s)
04/10/2003US20030066685 Steering apparatus
04/10/2003US20030066684 Enlargement drilling system
04/10/2003US20030066650 Drilling system and method for controlling equivalent circulating density during drilling of wellbores
04/10/2003US20030066470 Method for installing a number of risers or tendons and vessel for carrying out said method
04/10/2003DE10155105C1 Earth drill with pipe line installer has frame supporting hollow drill shaft with flushing pipes
04/09/2003EP1300543A1 Underreamer drilling system
04/09/2003EP0993539B1 Apparatus for and a method of drilling a lateral borehole
04/09/2003EP0828914B1 Adjustable stabilizer for directional drilling
04/09/2003CN2544085Y Downhole large diameter reamer
04/09/2003CN1408983A Method and equipment for solving air screw rod drill tool runaway problem
04/08/2003US6544308 High volume density polycrystalline diamond with working surfaces depleted of catalyzing material
04/08/2003US6543554 Adjustable housing for a mud motor
04/08/2003US6543553 Apparatus for use in drilling oil and gas production wells or water injection wells
04/08/2003US6543552 Method and apparatus for drilling and lining a wellbore
04/08/2003US6543550 Long range electronic guidance system for locating a discrete in-ground boring device
04/08/2003US6543536 Well reference apparatus and method
04/03/2003WO2003027714A1 Common interface architecture for horizontal directional drilling machines and walk-over guidance systems
04/03/2003US20030063013 Common interface architecture for horizontal directional drilling machines and walk-over guidance systems
04/03/2003US20030062198 Method and system for hydraulic friction controlled drilling and completing geopressured wells utilizing concentric drill strings
04/02/2003EP1297241A1 Method for drilling and casing a wellbore with a pump down cement float
04/02/2003EP0960261B1 Tool and method for drilling a lateral well
04/02/2003EP0960260B1 Tool for making an opening in a tubular in a wellbore
04/02/2003CN2542817Y Drill unit for cluster well
04/02/2003CN1407208A Modulated rotary guide offset devices
04/01/2003US6540443 Apparatus for and a method of boring the ground
03/2003
03/27/2003WO2003025337A1 Striking train for a ground-boring machine
03/27/2003WO2003025336A1 Active controlled bottomhole pressure system & method
03/27/2003WO2003025329A1 Directional drilling mechanical motor
03/27/2003WO2003025328A1 Steerable underreaming bottom hole assembly and method
03/27/2003WO2003025327A1 Percussion drilling head
03/27/2003US20030058125 Reservoir management system and method
03/27/2003US20030056991 Apparatus and method for simultaneous drilling and casing wellbores
03/27/2003US20030056985 Oscillating shear valve for mud pulse telemetry
03/27/2003US20030056983 Underground drilling device and method employing down-hole radar
03/27/2003US20030056963 Apparatus for controlling a downhole drilling motor assembly
03/27/2003CA2357999A1 Apparatus for controlling a downhole drilling motor assembly
03/26/2003EP1296018A2 Lining a lateral wellbore
03/26/2003EP1295011A2 Apparatus and method to complete a multilateral junction
03/26/2003EP1295005A1 Milling of casing using coiled tubing
03/26/2003CN1405429A High-pressure rotary jet rock-breaking drilling method
03/25/2003US6536993 Pile and method for installing same
03/25/2003US6536541 Boring unit for pile foundations
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