| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 09/10/1999 | WO1999045237A1 An arrangement for drilling slots |
| 09/10/1999 | WO1999045232A1 A mill and a method for milling |
| 09/09/1999 | DE19808478A1 Service pipeline laying method for gas, water, oil or electrical cable pipes |
| 08/31/1999 | US5945385 Method and composition for reducing torque in downhole drilling |
| 08/31/1999 | US5944123 Hydraulic jetting system |
| 08/31/1999 | US5944121 Apparatus and method for controlling an underground boring machine |
| 08/31/1999 | US5944107 Method and apparatus for establishing branch wells at a node of a parent well |
| 08/31/1999 | US5944105 Of a subterranean zone or formation penetrated by a wellbore |
| 08/31/1999 | US5944103 Retrievable milling guide anchor apparatus and associated methods |
| 08/31/1999 | US5944101 Apparatus for milling a window in well tubular |
| 08/26/1999 | WO1999042696A1 Method and system for drilling and completing underbalanced multilateral wells |
| 08/25/1999 | EP0772724B1 Method for steering a drill bit while drilling a bore hole |
| 08/24/1999 | US5941325 For mounting above a drill bit |
| 08/24/1999 | US5941323 Steerable directional drilling tool |
| 08/24/1999 | US5941322 Directional boring head with blade assembly |
| 08/24/1999 | US5941321 Method and apparatus for drilling a planar curved borehole |
| 08/24/1999 | US5941320 Directional boring machine |
| 08/18/1999 | EP0817901A4 Dual-member pipe joint for a dual member drill string |
| 08/18/1999 | EP0807201B1 Multiple drain drilling and production apparatus |
| 08/17/1999 | US5937958 Drill bits with predictable walk tendencies |
| 08/17/1999 | US5937954 Method for directional drilling |
| 08/17/1999 | US5937952 Feed shell positioning mechanism |
| 08/11/1999 | EP0935049A2 Wellbore apparatus and methods |
| 08/11/1999 | EP0934483A1 Hose supporting arrangement for actuators of rock drill apparatus |
| 08/11/1999 | CN1044632C Method for determining borehole direction |
| 08/10/1999 | US5934394 Drill means |
| 08/10/1999 | US5934392 For mounting above a drill bit |
| 08/10/1999 | US5934391 Sonde housing door hold-down system |
| 08/10/1999 | US5934390 Horizontal drilling for oil recovery |
| 08/10/1999 | US5934383 Steering device for steerable drilling tool |
| 08/10/1999 | CA2150175C Abrasive slurry jetting tool and method |
| 08/05/1999 | WO1999039077A1 Method and apparatus for one-trip insertion and retrieval of a tool and auxiliary device |
| 08/05/1999 | WO1999039074A1 Downhole motor assembly |
| 08/05/1999 | WO1999039073A2 Method and apparatus for running two tubing strings into a well |
| 08/05/1999 | DE19813409A1 Device for coupling rotary table connection of drilling apparatus to tube adapter for producing bore holes |
| 08/05/1999 | CA2260624A1 Lateral wellbore connection |
| 08/04/1999 | CN1044505C Drilling kick-off device and its reinserting device |
| 08/03/1999 | US5931601 For use in excavation of an inclined shaft |
| 08/03/1999 | US5931240 Drill bit concave steering channel for horizontal directional drilling |
| 08/03/1999 | US5931239 Adjustable stabilizer for directional drilling |
| 08/03/1999 | US5931235 Cutter head, boring jig and device and process for sea bottom boring |
| 07/29/1999 | WO1999037878A1 Slimhole drill system |
| 07/29/1999 | DE19802209A1 Expanding drilling head for pipe channels without trench digging |
| 07/27/1999 | US5929758 Method and apparatus for achieving parallel cable boring |
| 07/22/1999 | WO1999036662A1 Apparatus and method for milling through a whipstock in a wellbore |
| 07/22/1999 | DE19801415A1 Process and assembly to replace defective subsoil mains drainage or sewage pipes |
| 07/21/1999 | EP0738355B1 Improvements in or relating to apparatus for use in forming piles |
| 07/20/1999 | US5924500 Steerable boring machine |
| 07/20/1999 | US5924498 To mount above a drill bit at a lower end of a drill pipe for deep drilling |
| 07/15/1999 | WO1999035365A2 Downhole pressure intensifier for jet cutting |
| 07/14/1999 | EP0928877A2 Apparatus and methods for deploying tools in multilateral wells |
| 07/14/1999 | EP0928353A1 A method in piling tubular bases, a combined drilling and piling rig, as well as use of the drill hammer of said rig |
| 07/13/1999 | US5921476 Method and apparatus for conditioning fluid flow |
| 07/13/1999 | US5921337 Slope working machinery |
| 07/13/1999 | US5921332 For drilling a hole |
| 07/13/1999 | US5921328 Soil sampler |
| 07/09/1999 | CA2258379A1 Apparatus and methods for deploying tools in multilateral wells |
| 07/08/1999 | WO1999034087A1 Apparatus for facilitating removal of a casing of an overburden drilling equipment from a bore |
| 07/08/1999 | WO1999034085A1 Combined rotation drill |
| 07/08/1999 | WO1999023345A3 Mill for use in a wellbore and method of milling |
| 07/08/1999 | CA2318500A1 Apparatus for facilitating removal of a casing of an overburden drilling equipment from a bore |
| 07/07/1999 | EP0927811A1 System for sealing the intersection between a primary and a branch borehole |
| 07/07/1999 | EP0811106B1 Method of inserting a pipe into the ground |
| 07/06/1999 | US5918675 Apparatus for creating two wells in a single conductor |
| 06/30/1999 | EP0906487A4 A system for directional control of drilling |
| 06/30/1999 | CN1221468A Hydraulic device to be connected in pipe string |
| 06/29/1999 | US5915883 Submersible drive unit for use with underwater pile drivers and work units |
| 06/29/1999 | US5915485 Ski post hole auger bit |
| 06/29/1999 | US5915474 Multiple drain drilling and production apparatus |
| 06/24/1999 | WO1999031348A1 System and method for positioning a tool in a wellbore |
| 06/24/1999 | WO1999019596A3 Directional drilling tool |
| 06/22/1999 | CA2064429C Sealing device for expansion joints cut in dams |
| 06/17/1999 | WO1999029997A1 Apparatus for drilling lateral drainholes from a wellbore |
| 06/17/1999 | CA2256102A1 Downhole tool actuator |
| 06/15/1999 | US5911284 Downhole mud motor |
| 06/15/1999 | US5911283 For coupling a drive to an output |
| 06/15/1999 | US5911275 Apparatus for milling a well casing |
| 06/15/1999 | CA2183675C Trenchless pipeline installation method with pilot hole corrective alignment |
| 06/10/1999 | WO1999028686A1 Inverted cone cutter attachment for ice auger |
| 06/10/1999 | WO1999028587A1 Drilling system including eccentric adjustable diameter blade stabilizer |
| 06/10/1999 | DE19748580C1 Combination geotechnical depth probe with detachable probe head |
| 06/09/1999 | EP0921270A1 Underground augering machine by electrical crushing, excavator, and its excavating method |
| 06/09/1999 | EP0920567A1 Rock drilling rig |
| 06/09/1999 | EP0668977B1 Soil displacement hammer for replacing underground pipes |
| 06/09/1999 | EP0663040B1 Method for forming a window in a subsurface well conduit |
| 06/09/1999 | CN2323126Y Strong hole enlarger |
| 06/08/1999 | US5909770 Retrievable whipstock |
| 06/08/1999 | CA2180047C Internal pressure sleeve for use with easily drillable exit ports |
| 06/03/1999 | WO1999027192A1 Soil consolidation apparatus, tool and method |
| 06/02/1999 | CN2321936Y All intelligent multi-function hydraulic extruding-expading device |
| 05/26/1999 | EP0836667A4 Locating a discrete in-ground boring device |
| 05/26/1999 | CN2320783Y Nipple joint capable of reducing bottom-hole pressure difference |
| 05/26/1999 | CN1217416A Drilling system |
| 05/20/1999 | WO1999024694A1 Method and device for crushing rock, manipulator to be used in such a device, assembly of a housing and a wire conductor placed therein, and assembly of a housing and a means placed therein |
| 05/20/1999 | WO1999024689A1 Assembly and process for drilling and completing multiple wells |
| 05/20/1999 | WO1999024688A2 Adjustable stabilizer for directional drilling |
| 05/20/1999 | CA2221671A1 Vertical positioning system for drilling boreholes |
| 05/19/1999 | EP0916014A1 Apparatus and method for milling a hole in casing |
| 05/19/1999 | EP0764234B1 Whipstock assembly |
| 05/19/1999 | CN2319561Y Master machine of submersible drilling rig |