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)
08/2012
08/21/2012US8245785 Method and apparatus for lateral well drilling with biased length adjusting casing cutter
08/21/2012US8245774 Whipstock assembly for forming a window within a wellbore casing
08/21/2012CA2736776C Articulation assembly for moving a drill mast
08/21/2012CA2574249C Flexible directional drilling apparatus and method
08/21/2012CA2531334C Magnetic particle separator for an abrasive jetting system
08/21/2012CA2531328C Tool for excavating an object
08/18/2012CA2768162A1 Non-toxic, shale inhibitive water-based wellbore fluid
08/17/2012CA2854414A1 Low headroom confined space geoexchange drilling system and method
08/17/2012CA2738506A1 Low headroom confined space geoexchange drilling system and method
08/16/2012WO2012107075A1 Method and apparatus for drilling and lining a wellbore
08/16/2012US20120205159 Receiving lateral wellbore and method for implanting same
08/16/2012US20120205157 Tools for use in subterranean boreholes having expandable members and related methods
08/16/2012US20120205156 Methods of using a particle impact drilling system for removing near-borehole damage, milling objects in a wellbore, under reaming, coring perforating, assisting annular flow, and associated methods
08/16/2012US20120205155 Methods of using a particle impact drilling system for removing near-borehole damage, milling objects in a wellbore, under reaming, coring, perforating, assisting annular flow, and associated methods
08/16/2012DE102011004211A1 Bohrstütze für einen Bohrhammer Air leg rock drill for a
08/16/2012CA2825997A1 Method and apparatus for drilling and lining a wellbore
08/15/2012EP2487322A1 Moling apparatus
08/15/2012EP2487321A2 Connector and rod lock for a drilling rod
08/15/2012EP2487320A1 Gimlet
08/15/2012EP2486217A2 Hole opener with hybrid reaming section
08/15/2012CN202381010U Plug-in type expansion head
08/15/2012CN202380990U Pipe shoe self adaptive to stratum environment
08/15/2012CN202380977U Anti-fatigue short joint for gas drilling column
08/15/2012CN202380976U Mechanical automatic-switching type high-pressure water jet slotting drill
08/15/2012CN202380975U Deflecting device for large casing
08/15/2012CN202380974U Vehicle-mounted slant hole drilling machine
08/15/2012CN202380973U March-past concentrated gas-supply well drilling device of mountain drilling machine
08/15/2012CN202380972U Traveling telescopic derrick integrated drill
08/15/2012CN102639793A Tether tracking system and method for mobile machine
08/15/2012CN102635581A Hydraulic control system for ultra-deep radial well operations
08/15/2012CN102635312A Hydraulic telescoping rigid support reaming-while-drilling tool
08/15/2012CN102635311A Orienting device for drilling of radial horizontal well
08/15/2012CN102635310A Downhole casing drilling device of oil well
08/15/2012CN102041967B Recoverable track type deflection guider
08/15/2012CN101871328B Planetary drill bit assembly for balancing reactive torque of drilling equipment in well drilling
08/15/2012CN101294480B Device for drilling miniature borehole on ultra-short radius of coiled tubing
08/14/2012US8244115 Combination flashlight and a device for dispensing a volatile substance
08/14/2012US8240399 Drill bit with an adjustable steering device
08/14/2012US8240388 Submergible oil well sealing device and method for sealing underwater oil wells
08/14/2012US8240387 Casing annulus tester for diagnostics and testing of a wellbore
08/14/2012DE202011100538U1 Bohranlage Drilling rig
08/14/2012CA2539668C Steerable drilling system
08/09/2012WO2012105850A1 Method and device for deploying a cable and an apparatus in the ground
08/09/2012WO2012068119A3 Open-hole logging instrument and method for making ultr-deep magnetic and resistivity measurements
08/09/2012WO2012061465A3 Combination whipstock and completion deflector
08/09/2012US20120199399 Casing rotary steerable system for drilling
08/09/2012US20120199398 Wellbore completion system with reaming tool
08/09/2012US20120199396 Drill rig and associated drill rig traverse system
08/09/2012US20120199395 Cutting elements having a pre-formed fracture plane for use in cutting tools
08/09/2012US20120199366 Actuator and method
08/09/2012US20120199363 Downhole tool actuation
08/08/2012EP2483522A2 Boring element of a ground boring device
08/08/2012EP2483509A2 Tools for use in drilling or enlarging well bores having expandable structures and methods of making and using such tools
08/08/2012EP2483508A2 Earth-boring tools having expandable members and related methods
08/08/2012EP2483507A2 Earth-boring tools having expandable cutting structures and methods of using such earth-boring tools
08/08/2012EP2483506A2 Earth boring tools having expandable members
08/08/2012CN202370431U Linear drilling device of mine gas drainage drill rod
08/08/2012CN202370430U Mine rig
08/08/2012CN202370429U Excavator provided with rotary drilling rig
08/08/2012CN202370428U Drilling machine
08/08/2012CN102628337A Horizontal submarine polymetallic sulfide deposit area chimney sampling drill
08/08/2012CN102628336A Batter pile construction drilling machine and construction method
08/08/2012CN102627577A Emulaifier based on polyamines and fatty acid/maleic anhydride
08/08/2012CN101900223B Guide, spiral sludge discharge and pipeline jacking paving construction method
08/07/2012US8235147 Apparatus and method for installing ground anchoring systems
08/07/2012US8235146 Actuators, actuatable joints, and methods of directional drilling
08/07/2012US8235145 Gauge pads, cutters, rotary components, and methods for directional drilling
08/07/2012US8235144 Expansion and sensing tool
08/07/2012US8235141 Procedure and device for the optimal, utilization of carbon resources such as oil fields, oil shales, oil sands, coal, and CO2
08/07/2012US8235140 Methods and apparatus for thermal drilling
08/07/2012US8235124 Variable buoyancy subsea running tool
08/07/2012US8235119 Drilling fluid and method for reducing lost circulation
08/07/2012CA2642713C Drilling apparatus and method
08/07/2012CA2623625C Method and rock drilling rig for hole drilling
08/07/2012CA2617178C Ram style tensioner with fixed conductor and floating frame
08/07/2012CA2614459C Impeller arrangement
08/07/2012CA2587834C Tri-stable actuator apparatus and method
08/07/2012CA2544405C System for drilling oil and gas wells using a concentric drill string to deliver a dual density mud
08/06/2012DE202011100196U1 Vorrichtung für Bohrungen im Erdreich Apparatus for drilling holes in the ground
08/02/2012WO2012100283A1 In situ sampling and analysis system for a drill rig and a drill rig incorporating same
08/02/2012WO2012078304A3 Methods to manufacture downhole tools with finished features as an integral cage
08/02/2012WO2012054440A4 Offshore tower for drilling and/or production
08/02/2012US20120193145 Vibrating Downhole Tool
08/02/2012DE102008034083B4 Erdbohrvorrichtung Boring apparatus
08/02/2012CA2824297A1 In situ sampling and analysis system for a drill rig and a drill rig incorporating same
08/01/2012EP2480745A2 A method and apparatus for communicating with a device located in a borehole
08/01/2012EP1815101B1 Methods and apparatus for drilling, completing and configuring u-tube boreholes
08/01/2012CN202360039U Wear-resistant sand-releasing pipe for pneumatic drill
08/01/2012CN202360028U Quick dismounting cover type back-up plate structure of automatic vertical drilling tool
08/01/2012CN202360027U Drilling operation structure for horizontal oil well
08/01/2012CN202360026U Cylindrical integrated hydraulic power source of automatic vertical drilling tool
08/01/2012CN202360025U Full-hydraulic CBM (coal bed methane) truck-mounted drill
08/01/2012CN202360024U Reinforced upper frame longitudinal beam for rotary drilling rigs
08/01/2012CN202360023U Vehicle-mounted type full-hydraulic multifunction deep drilling rig
08/01/2012CN202360022U All-around vehicle-loading moving tray
08/01/2012CN102619552A Directional hydraulic pressing penetration, permeability increase and outburst elimination method of guide groove
08/01/2012CN102619470A Method for controlling transverse vibration of drill string in process of reaming while drilling
08/01/2012CN102619469A Device for hole drilling, seam cutting and pressure relief of coal seam
08/01/2012CN102619468A Injection device for particle impact drilling
08/01/2012CN102619467A Longitudinal beam oil cylinder support for rotary drilling rig
1 ... 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 ... 221