| 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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| 06/21/2012 | US20120152561 Emergency subsea wellhead closure devices |
| 06/21/2012 | US20120152543 One Trip Multiple String Section Milling of Subterranean Tubulars |
| 06/21/2012 | CA2819364A1 Autonomous downhole conveyance system |
| 06/20/2012 | EP2466056A2 Rotatable wireline tool of enhanced hydraulic drive consistency |
| 06/20/2012 | CN202280437U 逆向段铣刀 Reverse segment cutter |
| 06/20/2012 | CN102510969A Device for redirecting the flow of a fluid in a first pipe or tube to at least a second pipe, tube or hose without stopping the flow of the fluid |
| 06/20/2012 | CN102505926A Unfreezing machine for horizontal directional drilling |
| 06/14/2012 | WO2012078304A2 Methods to manufacture downhole tools with finished features as an integral cage |
| 06/14/2012 | US20120145394 Rotatable Wireline Tool of Enhanced Hydraulic Drive Consistency |
| 06/13/2012 | EP2462313A2 Cutter and cutting tool incorporating the same |
| 06/13/2012 | CN202273624U 引鞋头高压玻璃钢油管铣鞋 Cited toe shoes high pressure FRP pipe mill |
| 06/12/2012 | CA2682042C Tubular cutting device |
| 06/07/2012 | US20120138302 Device and method for well stimulation |
| 06/07/2012 | US20120138301 Controllably Installed Multilateral Completions Assembly |
| 06/06/2012 | EP2459840A1 Improvements in or relating to cooling |
| 06/06/2012 | CN202266222U 一种自扶正套管整形工具 A self-righting sleeve shaping tool |
| 06/06/2012 | CN202266221U Salvageable bottom plug combination |
| 06/06/2012 | CN202266220U Ultra-hard inclined plane special for window cutting of sleeve |
| 06/06/2012 | CN202266219U Measurement-while-drilling (MWD) directional rapid window cutting tool |
| 06/06/2012 | CN202266198U Retractable expansion tube connection sealing device |
| 06/06/2012 | CN101210485B Design method of expansion sleeve for oil field |
| 05/31/2012 | WO2012069634A1 Downhole punch component |
| 05/31/2012 | US20120132439 Multifunction downhole release tool mechanism with lost motion |
| 05/30/2012 | EP2458139A1 Downhole valve |
| 05/30/2012 | CN202249880U Pipe shearing device for oil field |
| 05/30/2012 | CN202249879U Double-layer sleeve windowing whipstock |
| 05/30/2012 | CN202249878U Milling shoe with adjustable diversion grooves |
| 05/30/2012 | CN202249877U Ball centralizing type constant pressure milling drilling device |
| 05/30/2012 | CN1946917B Method for processing underground rock stratum |
| 05/30/2012 | CN102482927A 用于密封地下钻孔和执行其它线缆井下旋转操作的装置及方法 Apparatus and method for sealing underground cables underground drilling and perform other operations for rotation |
| 05/30/2012 | CN101649728B Connection structure of I-shaped key expansion tube |
| 05/30/2012 | CN101614118B Clutch unlocking and rotating mechanism of underwater cutting tool |
| 05/29/2012 | US8186425 Sympathetic ignition closed packed propellant gas generator |
| 05/24/2012 | WO2012065259A1 Kobe sub, wellbore tubing string apparatus and method |
| 05/24/2012 | US20120125631 Systems and Methods of Diverting Fluids In A Wellbore Using Destructible Plugs |
| 05/24/2012 | US20120125630 Retrievable swellable packer |
| 05/24/2012 | CA2817777A1 Kobe sub, wellbore tubing string apparatus and method |
| 05/23/2012 | EP2454445A2 Downhole casing cutting tool |
| 05/23/2012 | CN202228030U Combination type well drilling, grinding and milling tool |
| 05/23/2012 | CN102472085A 切削件和包含该切削件的切削工具 Cutting parts and cutting tools include the cutting element |
| 05/17/2012 | US20120118583 Plug and method of unplugging a seat |
| 05/17/2012 | US20120118570 Device for a Downhole Apparatus for Machining of Casings and Also a Method of Depositing Machined Shavings |
| 05/16/2012 | EP2452039A2 Apparatus and methods for sealing subterranean borehole and performing other cable downhole rotary operations |
| 05/16/2012 | CN202220575U Shaft freezing pipe cutter |
| 05/16/2012 | CN102454378A Shear boost triggering and bottle reducing system and method |
| 05/15/2012 | CA2523348C Method of creating a borehole in an earth formation |
| 05/10/2012 | WO2012061096A2 Redundant position reference system for multilateral exit construction and method for use of same |
| 05/10/2012 | WO2012059859A1 Method and apparatus for completion of heavy oil unconsolidated sand reservoirs |
| 05/10/2012 | WO2012036854A3 Debris chamber with helical flow path for enhanced subterranean debris removal |
| 05/10/2012 | US20120111217 Explosive well tool firing head |
| 05/10/2012 | CA2812352A1 Redundant position reference system for multilateral exit construction and method for use of same |
| 05/10/2012 | CA2795641A1 Method and apparatus for completion of heavy oil unconsolidated sand reservoirs |
| 05/09/2012 | EP2450525A2 Earth boring drill bits with casing component drill out capability, cutting elements for same, and methods of use |
| 05/09/2012 | EP2449206A2 Wellbore laser operations |
| 05/09/2012 | CN202215177U Supplementing reinforcing tool for horizontal well sleeve |
| 05/09/2012 | CN202215176U Novel dismountable and replaceable compound windowing milling wimble |
| 05/09/2012 | CN202215175U Explosive cutting pup joint |
| 05/09/2012 | CN102444389A Freezing pipe cutter of shaft and construction method thereof |
| 05/03/2012 | US20120103629 Shear boost triggering and bottle reducing system and method |
| 05/02/2012 | EP2447465A2 System and method for opening a window in a casing string for multilateral wellbore construction |
| 05/02/2012 | EP2446111A2 Method for providing a temporary barrier in a flow pathway |
| 05/02/2012 | EP2446106A2 Apparatus and methods for forming and using subterranean salt cavern |
| 05/02/2012 | CN202209157U Reinforcing device for expansion pipe |
| 04/29/2012 | CA2755542A1 System and method for opening a window in a casing string for multilateral wellbore construction |
| 04/26/2012 | WO2012054445A2 Expandable casing patch |
| 04/26/2012 | US20120097391 Expandable casing patch |
| 04/26/2012 | US20120097390 System for remediating a wellbore annulus |
| 04/26/2012 | CA2810098A1 Expandable casing patch |
| 04/18/2012 | CN202194607U 套管整形滚珠辊 Casing plastic balls roll |
| 04/18/2012 | CN202194606U 一种套管补贴加固管定位机构 One kind of subsidy reinforced tubular sleeve positioning mechanism |
| 04/18/2012 | CN202194605U 一种套管补贴加固丢手装置 One kind of subsidy reinforced casing means throwing hand |
| 04/18/2012 | CN202194604U 一种回接套管组合钻塞工具 One kind of combination drills tieback casing plug tool |
| 04/18/2012 | CN102418489A 用于油气井套管整形的矫形机 For oil and gas well casing orthopedic shaping machine |
| 04/18/2012 | CN102418478A Hollow whipstock for windowing and side drilling of branched well |
| 04/17/2012 | CA2645803C Mechanical expansion system |
| 04/17/2012 | CA2467899C Thread integrity feature for expandable connections |
| 04/12/2012 | WO2012048157A2 Magnetic leak management apparatus and methods |
| 04/12/2012 | WO2012047604A1 Pump down swage expansion method |
| 04/12/2012 | WO2012047406A1 Subterranean cutting tool structure tailored to intended use |
| 04/12/2012 | WO2012047111A1 Cable cutting device |
| 04/12/2012 | CA2808129A1 Subterranean cutting tool structure tailored to intended use |
| 04/11/2012 | CN202187736U 磨鞋 Wear shoes |
| 04/05/2012 | WO2011163097A3 Apparatus and method for containing oil from a deep water oil well |
| 04/05/2012 | WO2011159420A3 Power supply system and method with remote variable frequency drive (vfd) |
| 04/03/2012 | US8146682 Apparatus and methods of milling a restricted casing shoe |
| 04/03/2012 | CA2425036C Sealed multilateral junction system |
| 03/29/2012 | WO2012040467A2 Wellbore tubular cutter |
| 03/29/2012 | US20120073816 Blowout preventer blade assembly and method of using same |
| 03/29/2012 | US20120073815 Blowout preventer blade assembly and method of using same |
| 03/29/2012 | CA2812148A1 Wellbore tubular cutter |
| 03/28/2012 | CN202176294U 一种可回收式液压底部锚 A recyclable hydraulic bottom anchor |
| 03/28/2012 | CN102395749A Device for a downhole apparatus for machining of casings and also a method of depositing machined shavings |
| 03/22/2012 | WO2012037248A2 Casing friendly, shearable hardbands and systems and methods for shearing same |
| 03/22/2012 | WO2012037130A1 Pump down liner expansion method |
| 03/22/2012 | WO2012036854A2 Debris chamber with helical flow path for enhanced subterranean debris removal |
| 03/22/2012 | US20120067596 Retrievable bridge plug |
| 03/22/2012 | US20120067578 Wellbore tubular cutter |
| 03/22/2012 | CA2811514A1 Casing friendly, shearable hardbands and systems and methods for shearing same |
| 03/21/2012 | CN101566052B Pipe expander for spherical corrugated pipe |
| 03/20/2012 | CA2749593C Monobore construction with dual expanders |