| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
|---|
| 09/09/2004 | US20040173381 Three-dimensional steering tool for controlled downhole extended-reach directional drilling |
| 09/09/2004 | DE10297180T5 Verfahren und Vorrichtung zum Ersetzen von unterirdischen Rohren Method and apparatus for replacing underground pipes |
| 09/02/2004 | WO2004074637A2 Sleeve piston fluid motor |
| 09/02/2004 | WO2004073929A2 Percussion tool and method |
| 09/02/2004 | US20040168829 Subsea controlled milling |
| 09/02/2004 | US20040168828 Tractor with improved valve system |
| 09/01/2004 | EP1451437A1 Fluid distributor device for down-hole-drills |
| 09/01/2004 | CN2637699Y Sand-proof antiblock screw stem drilling apparatus |
| 08/26/2004 | WO2004072437A1 Downhole tool |
| 08/26/2004 | WO2004072433A2 Downhole tractor with improved valve system |
| 08/26/2004 | CA2515482A1 Tractor with improved valve system |
| 08/26/2004 | CA2514534A1 A downhole tool with an axial drive unit |
| 08/25/2004 | EP0897453B1 Hammer device |
| 08/24/2004 | US6779598 Swivel and eccentric weight to orient a roller sub |
| 08/19/2004 | WO2004051004A3 Method and apparatus for sub-sea pile-driving |
| 08/19/2004 | WO2003067018A3 Well system |
| 08/19/2004 | US20040159464 Percussion tool and method |
| 08/19/2004 | US20040159428 Acoustical telemetry |
| 08/18/2004 | EP1386386B1 Downhole torque-generating and generator combination apparatus |
| 08/12/2004 | WO2004046505A3 Bottomhole assembly |
| 08/12/2004 | US20040154809 Method and apparatus for operations in underground/subsea oil and gas wells |
| 08/12/2004 | US20040154808 Tubing expansion |
| 08/12/2004 | CA2418717A1 Apparatus for controlling a downhole drilling motor assembly |
| 08/11/2004 | CN2632286Y 螺杆钻具 Screw drill |
| 08/05/2004 | WO2004053935A3 High power umbilicals for electric flowline immersion heating of produced hydrocarbons |
| 07/29/2004 | US20040144570 Downhole torque-generating and generator combination apparatus |
| 07/29/2004 | US20040144566 Boring apparatus |
| 07/29/2004 | US20040144548 Tractor with improved valve system |
| 07/22/2004 | WO2004061260A1 A rock drilling arrangement |
| 07/22/2004 | US20040140726 Downhole torque generator |
| 07/22/2004 | US20040140131 Downhole tool |
| 07/21/2004 | EP1438477A1 Down-the-hole drill hammer |
| 07/21/2004 | EP1171946A4 High frequency switch-mode dc powered computer system |
| 07/20/2004 | US6763899 Deformable blades for downhole applications in a wellbore |
| 07/15/2004 | US20040134662 High power umbilicals for electric flowline immersion heating of produced hydrocarbons |
| 07/14/2004 | EP1436482A2 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles |
| 07/13/2004 | US6761574 Coiled tubing connector |
| 07/13/2004 | US6761507 Method and apparatus for replacement of underground pipe |
| 07/13/2004 | US6761231 Rotary driven drilling hammer |
| 07/08/2004 | US20040129457 Torque absorber for downhole drill motor |
| 07/07/2004 | EP1198655B1 Continuous wellbore drilling system with stationary sensor measurements |
| 07/07/2004 | CN1510244A Method for shielding submersible drilling machine sealing element and air shielded submersible drilling machine |
| 07/06/2004 | US6758279 Puller-thruster downhole tool |
| 07/01/2004 | US20040124015 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 06/30/2004 | EP1434063A2 Drill string telemetry system and method |
| 06/29/2004 | US6755248 One trip through tubing window milling apparatus and method |
| 06/24/2004 | WO2004053935A2 High power umbilicals for electric flowline immersion heating of produced hydrocarbons |
| 06/24/2004 | WO2004020826A3 Gerotor mechanism |
| 06/24/2004 | WO2003048501A3 Downhole assembly releasable connection |
| 06/24/2004 | US20040119607 Drill string telemetry system and method |
| 06/24/2004 | US20040118611 Drilling a borehole |
| 06/24/2004 | US20040118565 Bi-directional thruster pig apparatus and method of utilizing same |
| 06/23/2004 | EP1430199A1 An inverted motor for drilling |
| 06/22/2004 | US6752222 Downhole percussion drills |
| 06/17/2004 | WO2004051004A2 Method and apparatus for sub-sea pile-driving |
| 06/17/2004 | US20040112646 Steel; rotation drilling; in situ cementing casing |
| 06/17/2004 | US20040112638 Percussion drill head |
| 06/09/2004 | CN1502782A Transmission shaft with metal rubber thrust bearing and rolling bearnig for downhole power drill |
| 06/09/2004 | CN1502781A Storage lubricant compensated rubber sealed transmission shaft with cylinder roller thrust bearing |
| 06/09/2004 | CN1502780A Intermediate spindle section with diamond thrust beaving for turbodrill |
| 06/08/2004 | US6745854 Electrically sequenced tractor |
| 06/08/2004 | US6745836 Down hole motor assembly and associated method for providing radial energy |
| 06/03/2004 | WO2004046505A2 Bottomhole assembly |
| 06/03/2004 | WO2003076763A9 Method and apparatus for one trip tubular expansion |
| 06/02/2004 | EP1423582A1 Assembly for drilling low pressure formation |
| 06/01/2004 | US6742609 Rotational impact drill assembly |
| 06/01/2004 | US6742605 Percussion tool for generic downhole fluid motors |
| 05/27/2004 | WO2003027433A9 An inverted motor for drilling |
| 05/26/2004 | EP1350002B1 Device for anchoring a drill string in a borehole |
| 05/25/2004 | CA2179893C Control device for drilling a bore hole |
| 05/18/2004 | US6736223 Thrust control apparatus |
| 05/13/2004 | US20040089480 Downhole motor locking assembly and method |
| 05/13/2004 | US20040089478 Lockable motor assembly for use in a well bore |
| 05/13/2004 | US20040089473 Backreaming tool |
| 05/13/2004 | US20040089461 Downhole percussion drilling apparatus |
| 05/12/2004 | CN2615320Y Well dynamic drilling rig drive shaft with diamond thrust bearing |
| 05/06/2004 | US20040085790 Autobias driving a high frequency power system |
| 05/06/2004 | US20040084219 Three-dimensional steering tool for controlled downhole extended-reach directional drilling |
| 05/06/2004 | EP1415064A1 Drilling apparatus |
| 05/06/2004 | EP1181432B1 Method of creating a wellbore |
| 05/06/2004 | EP1163423B1 Core barrel |
| 05/04/2004 | US6729413 Power tool with battery pack ejector |
| 04/28/2004 | EP1412607A1 Downhole motor lock-up tool |
| 04/22/2004 | WO2004013449A3 Device for advancing drillings in the ground |
| 04/22/2004 | WO2003016671A3 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles |
| 04/20/2004 | US6722453 Stabilized downhole drilling motor |
| 04/20/2004 | US6722441 Threaded apparatus for selectively translating rotary expander tool downhole |
| 04/15/2004 | WO2004031530A1 A down-the hole hammer |
| 04/15/2004 | US20040072064 Power tool with battery pack ejector |
| 04/15/2004 | US20040069533 Pneumatic rock-boring device and method for starting such a device |
| 04/15/2004 | US20040069501 Apparatus and methods for drilling with casing |
| 04/15/2004 | CA2500949A1 A down-the hole hammer |
| 04/14/2004 | EP1038086B1 Percussive tool |
| 04/13/2004 | US6719071 Apparatus and methods for drilling |
| 04/07/2004 | CN1487168A Drilling bit percussion apparatus for drill |
| 04/06/2004 | US6715962 Assembly and floatation method for drilling drivepipe |
| 04/06/2004 | US6715566 Balance structure for rotating member |
| 04/06/2004 | US6715559 Gripper assembly for downhole tractors |
| 04/01/2004 | WO2003027433A8 An inverted motor for drilling |
| 04/01/2004 | US20040060740 Pneumatic rock-boring device and method for horizontal drilling using compressed air and drilling medium |