| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 07/25/2007 | EP1809856A1 Conveyor tube for use in installing or replacing a well tool in a producing well and procedures for use of the same |
| 07/25/2007 | EP1704299B1 Non-threaded expandable pipe connection system |
| 07/25/2007 | EP1438480B1 Method for conditioning wellbore fluids and sucker rod therefor |
| 07/25/2007 | CN2926483Y Branch well coupling device |
| 07/25/2007 | CN2926482Y Well-drilling oil pipe of hydrogen-sulfide-resisting corrosive coating |
| 07/25/2007 | CN2926481Y Multifunctional replaceable drilling rod |
| 07/25/2007 | CN2926474Y Screw driller transmission axis assembly with double-prevention structure |
| 07/25/2007 | CN1328473C Joint for wire pipe and current loop inductive coupler |
| 07/25/2007 | CN101006248A Apparatus and methods for positioning in a borehole |
| 07/25/2007 | CN101006247A A rock drill bit and a thread joint |
| 07/24/2007 | US7248177 Down hole transmission system |
| 07/24/2007 | US7246667 Radial expansion of tubular members |
| 07/24/2007 | CA2420470C Apparatus and method for lining a downhole casing |
| 07/20/2007 | CA2533563A1 Casing centralizer coupling |
| 07/19/2007 | WO2007054353A3 Thread securer |
| 07/19/2007 | US20070163778 Casing Centralizer Coupling |
| 07/19/2007 | US20070163481 Submerged loading system |
| 07/18/2007 | EP1807601A1 System, method, and apparatus for survey tool having roller knuckle joints for use in highly deviated horizontal wells |
| 07/18/2007 | EP1623092B1 Device for rock bolting and for automized rock bolting and rock bolting |
| 07/18/2007 | EP1434924B1 Thread joint |
| 07/18/2007 | CN2923994Y Multifunction oil-increasing device |
| 07/18/2007 | CN2923979Y Continuous lever protector |
| 07/18/2007 | CN2923978Y Underground tool connection separator |
| 07/18/2007 | CN2923977Y Connection hoop of casing-pipe righter |
| 07/18/2007 | CN2923976Y Drill-bar locking-stopping mechanism of rotary-digging drilling machine |
| 07/18/2007 | CN1327104C A cable duct device in a swelling packer |
| 07/18/2007 | CN100999984A Auto-changing oblique contact type sucker rod centering guide |
| 07/18/2007 | CN100999983A Sucker rod hollow guiding device and its mfg. method |
| 07/18/2007 | CN100999982A Connecting hoop presetting sucker rod and mfg. method thereof |
| 07/17/2007 | US7243717 Apparatus in a drill string |
| 07/17/2007 | US7243714 Well provided with flexible production tubing |
| 07/17/2007 | CA2536716C Expanded threaded connection with seal at interface |
| 07/17/2007 | CA2452708C Hydraulic oil well pump drive system |
| 07/17/2007 | CA2387372C Drill string chuck |
| 07/17/2007 | CA2287946C Apparatus for controlling the motion of a string of tubulars in a wellbore |
| 07/17/2007 | CA2257611C System for sealing the intersection between a primary and a branch borehole |
| 07/17/2007 | CA2221789C Connector assembly for an expandable slotted pipe |
| 07/12/2007 | WO2007078233A1 A rock drill tool, a rock drill bit and a production method |
| 07/12/2007 | WO2006020809A3 Expandable tubular member having variable material properties |
| 07/12/2007 | US20070158091 Power hand tool having power transmission clutch |
| 07/12/2007 | US20070158060 System for sealing an annular space in a wellbore |
| 07/12/2007 | US20070157985 Tubing and piping for multiphase flow |
| 07/12/2007 | DE202005021273U1 Bohrwerkzeug und Bohrmaschine Drill and drill |
| 07/11/2007 | EP1588018B1 Data transmission system for a downhole component |
| 07/11/2007 | EP1570151B1 A cable duct device in a swelling packer |
| 07/11/2007 | CN2921263Y Sealer and polish rod axiality protecting apparatus |
| 07/11/2007 | CN2921258Y Roller centering device |
| 07/11/2007 | CN2921257Y Centering guide for wellhole verticality measurement |
| 07/11/2007 | CN2921256Y Vertical rotary falling antisubmerging protective closed door |
| 07/11/2007 | CN1995690A Fiber composite reinforced coupler |
| 07/11/2007 | CN1325751C Underground tubular column centralising device |
| 07/11/2007 | CN1325750C Screw joint for steel pipe |
| 07/11/2007 | CN1325749C Screw joint for steel pipe |
| 07/11/2007 | CN1325748C Screw joint for steel pipe |
| 07/11/2007 | CN1325747C Surface treatment method of internal thread of stainless steel oil pipe collar |
| 07/10/2007 | US7241075 Umbilical anchoring clamp |
| 07/10/2007 | US7240928 Tubing connection arrangement |
| 07/10/2007 | US7240734 System and method for fail-safe disconnect from a subsea well |
| 07/10/2007 | US7240731 Shoe for expandable liner system and method |
| 07/10/2007 | US7240728 Expandable tubulars with a radial passage and wall portions with different wall thicknesses |
| 07/10/2007 | CA2573555A1 Sucker rod connection with improved fatigue resistance, formed by applying diametrical interference to reduce axial interference |
| 07/05/2007 | WO2007075855A2 Concentric coiled tubing annular fracturing string |
| 07/05/2007 | US20070152445 Coupling apparatus |
| 07/05/2007 | US20070151768 Stabilising band for a roller assembly |
| 07/05/2007 | US20070151733 Production of natural gas from hydrates |
| 07/04/2007 | CN2918718Y Branch well location coupler |
| 07/04/2007 | CN2918714Y Float type pumping rod centralizer |
| 07/04/2007 | CN2918713Y Automatic inclined-plane changing contact type pumping rod centralizer |
| 07/04/2007 | CN2918712Y Spherical ball type drilling tool stabilizer |
| 07/04/2007 | CN2918711Y Smooth rod guide cover |
| 07/04/2007 | CN2918710Y Jack catch type pumping rod secund-wear prevention centralizer |
| 07/04/2007 | CN2918709Y Antiseptic secund-wear prevention pump rod joint |
| 07/04/2007 | CN2918708Y Pull-off preventing pumping rod |
| 07/04/2007 | CN1993533A System and methods using fiber optics in coiled tubing |
| 07/03/2007 | US7237809 Coiled tubing connector |
| 07/03/2007 | US7237626 Tool module connector for use in directional drilling |
| 07/03/2007 | US7237617 Disengageable downhole tool |
| 07/03/2007 | US7237613 Underbalanced marine drilling riser |
| 07/03/2007 | US7237607 Tubular stabbing protector and method |
| 07/03/2007 | CA2570700A1 A connector for use in a wellbore |
| 06/30/2007 | CA2570600A1 Downhole thermoelectric power generation |
| 06/28/2007 | WO2007073378A1 Release mechanism for downhole tool |
| 06/28/2007 | WO2007071624A1 External protection for expanding tubular threaded joints |
| 06/28/2007 | US20070144784 Method for drilling and lining a wellbore |
| 06/28/2007 | US20070144783 Rotating Systems Associated with Drill Pipe |
| 06/28/2007 | US20070144782 Apparatus and Method of Controlling Motion and Vibration of an NMR Sensor in a Drilling BHA |
| 06/28/2007 | US20070144753 Transducerized rotary tool |
| 06/28/2007 | CA2633728A1 External protection for expanding tubular threaded joints |
| 06/28/2007 | CA2602305A1 Release mechanism for downhole tool |
| 06/27/2007 | CN2916104Y Hydraulic oil pipe anchoring tools |
| 06/27/2007 | CN2916100Y Anti-slide type sucker rod centralizer |
| 06/27/2007 | CN2916099Y Torsion type universal joint for horizontal well |
| 06/27/2007 | CN2916098Y Self-releasing type liner hanger |
| 06/27/2007 | CN2916097Y Non-angular difference type locator sub |
| 06/27/2007 | CN2916096Y Hydraulic drill-pressure presser |
| 06/27/2007 | CN2916095Y Drill stem for horizontal well workover technology |
| 06/26/2007 | US7234527 System and method for fail-safe disconnect from a subsea well |
| 06/26/2007 | US7234410 Buoyancy control systems for tubes |
| 06/26/2007 | CA2431618C Casing shoe |
| 06/26/2007 | CA2324761C Adjustable sub-tension hanger |