| Patents for E21B 29 - Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground (5,744) |
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| 04/30/2013 | US8430174 Anhydrous boron-based timed delay plugs |
| 04/30/2013 | US8430173 High strength dissolvable structures for use in a subterranean well |
| 04/27/2013 | CA2791772A1 Aircraft equipped with a buoyancy system for a rotating element |
| 04/25/2013 | WO2013006208A3 Cable compatible rig-less operable annuli engagable system for using and abandoning a subterranean well |
| 04/25/2013 | WO2013003063A3 Milling assembly |
| 04/25/2013 | US20130098690 Repaired wear and buckle resistant drill pipe and related methods |
| 04/24/2013 | CN202900199U Oil layer perforation ground high-pressure injection apparatus |
| 04/24/2013 | CN202900117U Hydraulic bush shaping device |
| 04/24/2013 | CN202900116U Special casing milling head for broken well |
| 04/24/2013 | CN202900051U Double-layer casing window-opening drill bit |
| 04/24/2013 | CN103061700A Casing pipe dislocation horizontal well correction and repair method and dedicated integration tools of casing pipe dislocation horizontal well correction and repair |
| 04/23/2013 | US8424610 Flow control arrangement and method |
| 04/23/2013 | US8424607 System and method for severing a tubular |
| 04/23/2013 | US8424606 Method and apparatus for perforating with reduced debris in wellbore |
| 04/23/2013 | US8424595 Method and apparatus for releasing a coiled tubing internal conduit from a bottom hole assembly |
| 04/23/2013 | CA2626421C System and method for performing multiple downhole operations |
| 04/18/2013 | WO2013055600A1 Arc guiding, gripping and sealing device for magnetically impelled butt welding rig |
| 04/18/2013 | WO2013055598A1 Enhanced magnetically impelled arc butt welding (miab) technology |
| 04/18/2013 | US20130092383 Methods and apparatus for subsea well intervention and subsea wellhead retrieval |
| 04/18/2013 | US20130092378 Selectively fired high pressure high temperature back-off tool |
| 04/17/2013 | EP2580512A2 Device and method for blocking pipelines, especially under the sea |
| 04/11/2013 | WO2013052360A1 Wellbore casing cutting tool |
| 04/11/2013 | WO2013052225A1 Cutting assembly and method of cutting coiled tubing |
| 04/11/2013 | WO2013050978A2 Tubular apparatus for the continuous completion of hydrocarbon wells, and corresponding laying method |
| 04/11/2013 | CA2848184A1 Cutting assembly and method of cutting coiled tubing |
| 04/10/2013 | EP2578798A1 Valve and method of operating a valve |
| 04/10/2013 | EP2576962A2 System and method for severing a tubular |
| 04/10/2013 | EP2576961A2 Tubular severing system and method of using same |
| 04/10/2013 | EP2576960A2 Tubular severing system and method of using same |
| 04/10/2013 | CN202866715U Noise reduction device of oil tube repairing line |
| 04/10/2013 | CN202866714U Sleeve-pipe drift diameter gauge |
| 04/10/2013 | CN202866713U Special sleeve dislocation eccentric correct setting hanger for repairing sleeves of horizontal well |
| 04/10/2013 | CN202866712U Correct setting pipe column and repairing pipe column for horizontal well sleeve dislocation |
| 04/10/2013 | CN202866711U Dislocated sleeve correcting device capable of being pulled up |
| 04/10/2013 | CN202866710U Breaking key tool for keyway formed in petroleum drilling |
| 04/10/2013 | CN202866709U Inner tooth type mill shoe |
| 04/10/2013 | CN101793131B Drilling and grinding tubular column structure of two-stage shunting screw drill |
| 04/09/2013 | US8413727 Dissolvable downhole tool, method of making and using |
| 04/04/2013 | WO2013048371A1 Forming inclusions in selected azimuthal orientations from a casing section |
| 04/04/2013 | US20130081826 In-situ generated buffer system |
| 04/04/2013 | US20130081825 Apparatus and Methods Utilizing Nonexplosive Energetic Materials for Downhole Applications |
| 04/04/2013 | US20130081823 Valve |
| 04/04/2013 | US20130081814 Apparatus and Method for Galvanically Removing From or Depositing Onto a Device a Metallic Material Downhole |
| 04/04/2013 | US20130081803 Centralizing Mechanism Employable with a Downhole Tool |
| 04/04/2013 | CA2847591A1 Forming inclusions in selected azimuthal orientations from a casing section |
| 04/03/2013 | CN202850914U Oceaneering riser guiding shoe |
| 04/03/2013 | CN103015935A Top-down pull rod type expansion pipe structure |
| 04/03/2013 | CN103015934A Connecting rod structure with demountable expansion cone |
| 04/03/2013 | CN101538991B Electromagnetic method pipe fitting shaping technique |
| 03/27/2013 | CN202832328U Hydraulic anchor capable of being closed mechanically and for fixing tubular columns in oil wells and water wells |
| 03/27/2013 | CN102146779B Underground locating and angle-fixing drilling and windowing tool for horizontal well |
| 03/27/2013 | CN101778994B Method of lining a well or a pipe using an inflatable bladder |
| 03/26/2013 | US8403049 Methods and devices for one trip plugging and perforating of oil and gas wells |
| 03/26/2013 | US8403048 Slickline run hydraulic motor driven tubing cutter |
| 03/26/2013 | US8403037 Dissolvable tool and method |
| 03/20/2013 | EP2569510A2 Undersea leak remediation device and method |
| 03/20/2013 | CN202810743U Oil well casing reshaper |
| 03/20/2013 | CN202810742U Slide valve device of oil well casing subsidy machine |
| 03/20/2013 | CN202810741U Tool using cable to convey explosive fuel |
| 03/20/2013 | CN202810740U 偏心辊子整形器 Eccentric roller shaper |
| 03/20/2013 | CN202810739U Self-positioning well wall tapper of casing pipe |
| 03/20/2013 | CN102985637A Tubular severing system and method of using same |
| 03/20/2013 | CN102080512B Multiposition one-way bypass connection structure for deep-water abandoned well cutting device |
| 03/20/2013 | CN102080511B Deepwater abandoned well cutting device having cementing plug and operation method of cementing plug thereof |
| 03/19/2013 | US8397826 Pump down liner expansion method |
| 03/19/2013 | US8397814 Perforating string with bending shock de-coupler |
| 03/14/2013 | WO2013036133A1 Method and device for producing an opening from a motherbore and into a formation |
| 03/14/2013 | WO2013022691A3 Multilateral location and orientation assembly |
| 03/14/2013 | WO2012161910A3 Window joint for lateral wellbore construction and method for opening same |
| 03/14/2013 | US20130062063 Completing a multi-stage well |
| 03/13/2013 | CN202788710U Integral drifting tool |
| 03/13/2013 | CN202788709U Sealing and stringing device for sleeve of oil-water well |
| 03/13/2013 | CN202788708U Repairing device for sleeve of oil well |
| 03/13/2013 | CN202788707U Plug drilling auxiliary tool for downhole operation |
| 03/13/2013 | CN102966323A Combined reducing expansion cone of expansion pipe |
| 03/12/2013 | US8393392 Method and apparatus for perforating multiple wellbore intervals |
| 03/07/2013 | US20130058732 Device for remote-controlled, submarine machining unit |
| 03/07/2013 | US20130056219 Subsea test tree control system |
| 03/06/2013 | CN202767927U Hydraulic watermelon peel bushing reshaping device of down hole |
| 03/06/2013 | CN202767926U Down hole hydraulic device of drilling cement plug |
| 03/06/2013 | CN202767925U Cut-off and leak-repairing device of air-bag-type pipeline |
| 03/06/2013 | CN202767923U Circulating anti-blocking tool used for oil-water well pulling-out casing |
| 03/06/2013 | CN101988375B Intelligent tractor hoist of deep well in oil field |
| 02/28/2013 | WO2013028946A1 Hydraulic stabilizer for use with a downhole casing cutter |
| 02/28/2013 | WO2011146219A3 Cutting dart and method of using the cutting dart |
| 02/28/2013 | US20130048306 Apparatus and method for penetrating cement surrounding a tubular |
| 02/28/2013 | US20130048305 Degradable slip element |
| 02/28/2013 | US20130048287 Hydraulic stabilizer for use with a downhole casing cutter |
| 02/28/2013 | US20130048268 Multi-position Mechanical Spear for Multiple Tension Cuts with Releasable Locking Feature |
| 02/28/2013 | DE102012208792A1 Verfahren zur Ausdehnung eines integrierten kontinuierlichen Liners Process for the expansion of an integrated continuous liner |
| 02/27/2013 | EP2561172A2 Method for forming slots in a wellbore casing |
| 02/27/2013 | CN202755936U Waterpower cutting knife assembly with mechanical cutting knife correction structure |
| 02/27/2013 | CN102943628A Double-layered casing windowing drillbit |
| 02/26/2013 | US8381818 Apparatus for, and method of, landing items at a well location |
| 02/26/2013 | CA2684983C One trip milling system |
| 02/21/2013 | WO2012158370A4 Tubular cutting with debris filtration |
| 02/20/2013 | CN202745804U Outer channeling groove lugging device of oil-water well sleeve |
| 02/20/2013 | CN202745780U Cutting device of deepwater turbine abandoned well |
| 02/20/2013 | CN102937009A Top pressure bearing expansion pipe construction operation method |
| 02/20/2013 | CN102937008A Top multistage pressure-bearing expansion pipe expansion construction device |