| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
|---|
| 02/06/2002 | EP0996806A4 Method and apparatus for moving a piston |
| 02/05/2002 | US6343657 Method of injecting tubing down pipelines |
| 01/31/2002 | US20020011360 Drill hammer assembly |
| 01/31/2002 | US20020011357 Fluid drilling system with drill string and retro jets |
| 01/31/2002 | US20020011355 Method and apparatus for directional boring under mixed conditions |
| 01/31/2002 | DE10034742A1 Werkzeug mit zugeordnetem Schlagwerkzeug Tool with an associated impact tool |
| 01/30/2002 | CN2474722Y Intelligent electric energy saving device of pumping unit |
| 01/30/2002 | CN1333112A Cutter with impact tool |
| 01/24/2002 | WO2002006624A1 Ram drill |
| 01/24/2002 | US20020007971 Electro-hydraulically controlled tractor |
| 01/24/2002 | US20020007970 Well system |
| 01/24/2002 | DE10034471A1 Rammbohrgerät Ram boring machine |
| 01/23/2002 | EP1174225A1 Percussion tool |
| 01/16/2002 | EP1171946A1 High frequency switch-mode dc powered computer system |
| 01/16/2002 | EP1171250A1 Portable torque tester for downhole motors |
| 01/10/2002 | WO2002002903A1 Milling of casing using coiled tubing |
| 01/09/2002 | CN1077666C Guided drilling system with shock absorber |
| 01/08/2002 | US6336502 Slow rotating tool with gear reducer |
| 01/03/2002 | WO2002001036A1 Drilling turbine |
| 01/03/2002 | WO2001044615A3 Composite stator for drilling motors and method of constructing same |
| 01/02/2002 | EP1165929A1 Method and apparatus for directional boring |
| 01/02/2002 | EP0901561B1 A hydraulic device to be connected in a pipe string |
| 12/27/2001 | WO2001098626A1 System for creating a conduit in a borehole formed in an earth formation |
| 12/27/2001 | WO2001098619A2 Drive system |
| 12/27/2001 | US20010055537 Downhole roller vane motor and roller vane pump |
| 12/27/2001 | US20010054515 Downhole apparatus |
| 12/27/2001 | CA2411241A1 System for creating a conduit in a borehole formed in an earth formation |
| 12/20/2001 | US20010052427 Three dimensional steerable system |
| 12/19/2001 | EP1163423A1 Core barrel |
| 12/09/2001 | CA2710783A1 Pump drive head with stuffing box |
| 12/06/2001 | US20010047887 Drill head for directional boring |
| 12/04/2001 | CA2009733C Device in impact machines |
| 11/29/2001 | WO2001090527A1 Hydraulic in-the-hole percussion rock drill |
| 11/29/2001 | US20010045304 Drilling apparatus |
| 11/29/2001 | US20010045302 Flexible hose with thrusters for horizontal well drilling |
| 11/28/2001 | EP1157187A1 Moulten bath drilling method |
| 11/22/2001 | WO2000056478A9 Portable torque tester for downhole motors |
| 11/22/2001 | US20010043838 Skate apparatus for injecting tubing down pipelines |
| 11/21/2001 | EP1155216A1 Drilling method |
| 11/17/2001 | CA2308679A1 Drilling tool |
| 11/15/2001 | WO2001086109A1 Drill bit mounting for a downhole drilling machine |
| 11/13/2001 | US6315498 Thruster pig apparatus for injecting tubing down pipelines |
| 11/13/2001 | US6315063 Reciprocating rotary drilling motor |
| 11/08/2001 | WO2001083937A1 Borehole retention assembly |
| 11/08/2001 | WO2001083931A1 Down hole hammer having a top sub |
| 11/08/2001 | WO1999066171A3 Method and system for moving equipment into and through an oil and/or gas production well |
| 11/08/2001 | EP1144801A3 Method and system for moving equipment into and through an oil and/or gas production well |
| 11/07/2001 | EP1151177A1 Downhole tractor |
| 11/01/2001 | WO2001081704A1 Backreaming tool |
| 11/01/2001 | CA2407042A1 Backreaming tool |
| 10/31/2001 | EP1149224A1 Thrust bearing for downhole tool |
| 10/23/2001 | US6307757 High frequency switch-mode DC powered computer system |
| 10/23/2001 | US6305469 Method of creating a wellbore |
| 10/23/2001 | CA2178527C Boring ram |
| 10/18/2001 | WO2001077482A1 Flexible hose with thrusters for horizontal well drilling |
| 10/18/2001 | WO2001038689A8 Device for manipulating a tool in a well tubular |
| 10/18/2001 | US20010030045 Assembly and floatation method for drilling drivepipe |
| 10/17/2001 | EP1144801A2 Method and system for moving equipment into and through an oil and/or gas production well |
| 10/17/2001 | EP1144795A1 Downhole mud motor transmission |
| 10/16/2001 | US6302666 Downhole roller vane motor |
| 10/04/2001 | EP1138870A1 Drill hammer assembly |
| 10/02/2001 | US6296066 Well system |
| 09/27/2001 | WO2001071150A1 'down-the-hole' hammer with variable pressure chamber |
| 09/27/2001 | CA2342140A1 Drill hammer assembly |
| 09/25/2001 | US6293358 Machine operating according to the Moineau-Principle for the use in deep drilling |
| 09/25/2001 | US6293357 Hydraulic in-the-hole percussion rock drill |
| 09/20/2001 | US20010022241 Bottomhole assembly and methods of use |
| 09/20/2001 | US20010022240 Downhole hammer-type core barrel and method of using same |
| 09/18/2001 | US6290424 Segmented ring mounting for a fluid-operated percussion drill tool |
| 09/18/2001 | CA2214741C Tractor for remote movement and pressurization of a rock drill |
| 09/13/2001 | WO2001066900A2 Method and apparatus for directional boring under mixed conditions |
| 09/11/2001 | US6286614 Motion compensator for drilling from a floater |
| 09/11/2001 | US6286592 Puller-thruster downhole tool |
| 09/04/2001 | US6283229 Impact device for directional boring |
| 08/28/2001 | US6279670 Downhole flow pulsing apparatus |
| 08/28/2001 | US6279667 Rotating push rod boring system |
| 08/23/2001 | DE10106942A1 Pneumatisches Bodenstechwerkzeug mit beweglichem Meißelkopf Pneumatic floor grooving tool with movable cutter head |
| 08/16/2001 | WO2001059247A1 Percussive down-the-hole rock drilling hammer and piston therefor |
| 08/16/2001 | EP1124037A1 Drilling device |
| 08/14/2001 | US6273201 Pneumatic ground piercing tool with movable chisel head |
| 08/14/2001 | US6273189 Downhole tractor |
| 08/09/2001 | DE10005475A1 Drilling device; has inner rod, hollow outer rod and rotation device to rotate both rods, which drives drive wheel of outer rod and drive wheel of inner rod |
| 08/07/2001 | US6269889 Ground piercing tool with plastic body |
| 07/31/2001 | CA2056043C Flow restrictor for mud lubricated earth drilling motors |
| 07/25/2001 | EP1117893A1 Lubricant circulation system for downhole bearing assembly |
| 07/25/2001 | CN1305562A Downhole milling device |
| 07/25/2001 | CN1305046A Multiple air hammer device and trenching direction correcting method |
| 07/24/2001 | CA2255179C Drilling motor drill bit reaming stabilizer |
| 07/17/2001 | US6260617 Skate apparatus for injecting tubing down pipelines |
| 07/12/2001 | WO2001049964A1 Long gauge roller vane drilling motor |
| 07/12/2001 | CA2396532A1 Long gauge roller vane drilling motor |
| 07/11/2001 | EP1005602B1 Drilling system with means for anchoring in the borehole |
| 07/05/2001 | US20010006120 Multiple air hammer apparatus and excavating direction correcting method therefor |
| 06/28/2001 | WO2001046549A1 Three dimensional steerable system |
| 06/26/2001 | US6250806 Downhole oil-sealed bearing pack assembly |
| 06/21/2001 | WO2001044615A2 Composite stator for drilling motors and method of constructing same |
| 06/21/2001 | US20010004020 Ram device |
| 06/20/2001 | CN1299915A Automatically controlled rotation-controllable drilling system and drilling method |
| 06/13/2001 | EP1106777A1 Method and apparatus for steering a directional drilling tool |
| 06/13/2001 | EP1105616A1 Drilling turbine |