| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 01/26/1993 | US5182516 Moling system including transmitter-carrying mole for detecting and displaying the roll angle of the mole |
| 01/26/1993 | US5181576 Downhole adjustable stabilizer |
| 01/26/1993 | US5181571 Well casing flotation device and method |
| 01/26/1993 | CA1313127C Method of protecting a permeable formation |
| 01/21/1993 | WO1993001390A1 Device for adjusting the path azimuth of a rotary drilling tool |
| 01/21/1993 | WO1993001364A1 Pile driving machine |
| 01/21/1993 | CA2090676A1 Device for adjusting the path azimuth of a rotary drilling tool |
| 01/20/1993 | EP0524042A1 Apparatus actuated by the hydrostatic pressure of a drilling fluid |
| 01/19/1993 | US5180021 Orientable stabilizer |
| 01/19/1993 | CA1312937C Method of controlling the direction of a drill bit in a borehole |
| 01/19/1993 | CA1312832C Electrical conductor arrangements for pipe system |
| 01/17/1993 | CA2074036A1 Hydraulic actuator using drilling fluid for the control of drill string equipment and method of use |
| 01/13/1993 | EP0522446A2 Method for controlling the direction of an earth drilling apparatus and device for making bore holes |
| 01/12/1993 | US5178223 Device for making a hole in the ground |
| 01/07/1993 | WO1993000286A1 Improvement for a hoisting boom assembly |
| 01/07/1993 | EP0521157A1 Propelling system in small diameter pipe propeller |
| 01/05/1993 | US5176219 Method of sealing holes in the ground |
| 01/05/1993 | US5176211 Apparatus and method for recirculating mud when drilling under an obstacle |
| 01/05/1993 | US5176210 Thermochemical ice melting |
| 12/30/1992 | EP0520909A1 Tunnelling machine having a cutting head, the position of which can be controlled |
| 12/30/1992 | EP0520733A1 Steerable rotary drilling system |
| 12/30/1992 | EP0520578A2 Surface adjustable bent housing |
| 12/30/1992 | CN2126305U Plug-in type eccentric borehole-enlarging drilling device |
| 12/30/1992 | CN1067475A Crawling device |
| 12/29/1992 | US5174686 Pipe-laying apparatus |
| 12/29/1992 | US5174391 Tubular element for use in a rotary drilling assembly and method |
| 12/29/1992 | US5174390 Modular cluster drill apparatus |
| 12/29/1992 | CA1312072C Downhole drilling assembly orienting device |
| 12/28/1992 | CA2072517A1 Surface adjustable bent housing |
| 12/28/1992 | CA2045888A1 Adjustable bent sub |
| 12/28/1992 | CA2045822A1 Hoisting boom assembly |
| 12/27/1992 | CA2072552A1 Adjustable bent sub i |
| 12/23/1992 | WO1992022833A1 Method and apparatus for detecting boundary stratum |
| 12/23/1992 | WO1992022727A1 Method and means for driving pipes into the ground and cartridge used therefor and for subsequent pipe blasting |
| 12/23/1992 | CA2111005A1 Method and means for driving pipes into the ground and cartridge used therefor and for subsequent pipe blasting |
| 12/22/1992 | US5173009 Apparatus for replacing buried pipe |
| 12/22/1992 | US5172771 Reversible impact-operated boring tool |
| 12/17/1992 | DE4132314C1 Vehicle mounted piling drill with mast - on which travels carriage with rotary head and tool duct laterally offset w.r.t.carriage guideway |
| 12/16/1992 | EP0518705A1 Crushing apparatus |
| 12/16/1992 | EP0517731A1 Apparatus and method for building a foundation for uprights or for making passages therethrough. |
| 12/15/1992 | US5171106 Cutting/expanding tool |
| 12/15/1992 | CA1311505C Selectively phased water supply of a cutter head |
| 12/15/1992 | CA1311372C Method and apparatus for controlled directional drilling of boreholes |
| 12/10/1992 | WO1992021853A1 Hole indexing device for rock drilling |
| 12/10/1992 | WO1992021852A1 Method and drilling apparatus for line drilling |
| 12/10/1992 | WO1992021848A1 Method and apparatus for determining path orientation of a passageway |
| 12/10/1992 | WO1992010637A3 Tool for making holes in the ground |
| 12/09/1992 | EP0517603A1 Method for drilling a blind well, in particular of big diameter, and drilling tool for carrying it out |
| 12/09/1992 | EP0516998A1 Ductile cast iron driving tube |
| 12/08/1992 | US5169264 Propulsion process of buried pipe |
| 12/08/1992 | US5168943 Adjustable bent sub |
| 12/08/1992 | US5168941 Drilling tool for sinking wells in underground rock formations |
| 12/08/1992 | US5168940 Profile melting-drill process and device |
| 12/08/1992 | US5168939 Electromagnetically accelerated impact oil well drill |
| 12/08/1992 | US5168765 Water sampler |
| 12/02/1992 | EP0516599A1 Device in hammer machines |
| 12/02/1992 | EP0515508A1 Pipe alignment device |
| 12/02/1992 | CN2123598U Waist drum stabilizer |
| 11/26/1992 | WO1992014905A3 Device for the precise directional control of capping bores |
| 11/26/1992 | DE4217293A1 Laying drainage and sewage pipes without excavating - using water-jet mounted at front of pipe string which removes spoil internally as pipe driven through soil |
| 11/26/1992 | DE4116771A1 Boring through ground from starting pit for laying pipes and cables without digging trenches - has rod assembly that includes quick action bayonet couplings and locking devices |
| 11/25/1992 | EP0514657A1 Angled sidewall coring assembly and method of operation |
| 11/25/1992 | CN1066457A Multifunctional well-drilling liquid treating agent and preparation method thereof |
| 11/24/1992 | US5165491 Method of horizontal drilling |
| 11/24/1992 | US5165490 Boring tool having electromagnetic wave generation capability |
| 11/24/1992 | US5165438 Fluidic oscillator |
| 11/21/1992 | CA2065141A1 Angled sidewall coring assembly and method of operation |
| 11/17/1992 | US5163522 Angled sidewall coring assembly and method of operation |
| 11/17/1992 | US5163521 System for drilling deviated boreholes |
| 11/17/1992 | US5163520 Apparatus and method for steering a pipe jacking head |
| 11/12/1992 | WO1992019837A2 Earth borer |
| 11/12/1992 | DE4114666A1 Pipe-laying device to replace old pipes - has guide head and basket with rotatable drilling head breaking up old pipe and enlarging pipe trench |
| 11/11/1992 | EP0512331A1 Device for cleaning the well-bore-surrounding-zone |
| 11/11/1992 | EP0512330A1 Drill bit |
| 11/11/1992 | EP0512329A2 Core bit with hydrodynamic core destruction |
| 11/11/1992 | CN1019038B Method of and arrangement for drilling hole in rock |
| 11/04/1992 | EP0511298A1 Drilling tool for percussive and rotary drilling. |
| 11/04/1992 | EP0418402A4 Device for making holes in the ground |
| 11/03/1992 | US5159891 Adjustable boat mooring system for a flexibly-supported tension leg platform |
| 10/30/1992 | CA2064395A1 Extendable/erectable arm assembly |
| 10/29/1992 | WO1992018705A1 Maintenance and extraction of poles |
| 10/29/1992 | DE4113422A1 Erdbohrgeraet Earth drilling |
| 10/27/1992 | WO1992019836A1 Engine for performing subsea operations and devices driven by such an engine |
| 10/27/1992 | US5158146 Mobile foxhole excavator |
| 10/27/1992 | CA2109107A1 Machine for subsea operations |
| 10/27/1992 | CA2041310A1 Hinged removable collar for oil drilling apparatus |
| 10/24/1992 | CA2054141A1 Earth duct tunnel enlargement apparatus and method |
| 10/21/1992 | EP0340280A4 Self-propelled subsoil penetrating tool system |
| 10/21/1992 | CN2119490U Down-hole rolling rig |
| 10/20/1992 | US5156222 Directional drilling tool apparatus and method |
| 10/15/1992 | WO1992017724A1 Device for trench-free replacement of underground pipelines |
| 10/15/1992 | WO1992017678A1 Method of hole drilling |
| 10/13/1992 | WO1992018740A1 Oil, gas or geothermal drilling apparatus |
| 10/13/1992 | US5154347 Ultrasonically generated cavitating or interrupted jet |
| 10/13/1992 | US5154243 Bent sub |
| 10/13/1992 | US5154231 Whipstock assembly with hydraulically set anchor |
| 10/07/1992 | EP0507610A1 Uphole hammer |
| 10/07/1992 | EP0506689A1 Drilling tool for widening a bore well. |
| 10/06/1992 | US5152639 Tubular footing form for building foundation piles of concrete |
| 10/06/1992 | US5152638 Process and apparatus for excavating tunnels |