Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 31 - Fishing for or freeing objects in boreholes or wells
Patents for E21B 31 - Fishing for or freeing objects in boreholes or wells (3,788)
06/2014
06/04/2014CN203626679U 一种应用于大位移井的喷射型通井工具 Applied to reach wells through injection wells type tool
06/04/2014CN203626678U 一种用于水平井钻铣打捞的机械式轴向钻压控制工具 Mechanical axial horizontal well drilling and milling for salvage WOB control tools
06/04/2014CN203626656U 一种正循环多喷嘴负压发生器 A positive cycle of multi-nozzle vacuum generator
06/04/2014CN103835677A Two-stage sealing bumping-pressure salvageable well completion device for horizontal well
06/03/2014US8739888 Mechanically actuated casing drive system tool
05/2014
05/28/2014CN103821473A 一种钻孔孔底落物打捞器 Litter for a drilled hole bottom fisher
05/28/2014CN103821472A 膨胀管用可捞底堵及打捞工具 Expansion works can block bottom fishing and fishing tools
05/22/2014WO2014078685A1 Fishing guide for directing a skewed fish in a wellbore
05/22/2014WO2014077697A1 Petroleum well imaging tool for a well object of unknown shape
05/22/2014US20140138969 Fishing Guide for Directing a Skewed Fish in a Wellbore
05/21/2014CN203603869U 一种可打捞球座的多级投球压裂滑套 One kind can salvage tee multistage fracturing pitching sleeve
05/21/2014CN203603832U 采油井坐封过电缆封隔器的堵塞器 Production wells over cable packer packer plugging device
05/21/2014CN203603815U 一种通刮一体化井下工具 One kind of scraping through the integration of downhole tools
05/15/2014WO2014074754A2 External catch fishing tool
05/14/2014CN203594433U 分段压裂地面捕球装置 Staged fracturing the ground to catch the ball means
05/14/2014CN203594396U 一种六摄像头的气井内落井钢球专用捕捞装置 Wells within a six-camera special fishing devices fall into a ball
05/14/2014CN203594395U 一种自带摄像头的气井电缆专用打捞装置 One kind of comes with the camera wells and cable salvage equipment
05/14/2014CN103790539A 一种水力正压冲击解堵工艺 One kind of positive impact of hydraulic plugging process
05/14/2014CN103790538A 深水井下用钻具通径装置 Sham downhole drill diameter by means
05/13/2014US8720540 Magnetic key for operating a multi-position downhole tool
05/07/2014CN203584355U 一种油水井液压倒扣打捞器 An oil wells, hydraulic flip fisher
05/07/2014CN203584354U 可控提放打捞矛 Controllable put up spear
05/07/2014CN203584353U 机电一体化井下打捞释放装置 Mechatronics underground salvage release device
05/07/2014CN203584352U 一种一次全井钻柱通径规 A once-all-well drill string diameter Regulation
05/07/2014CN203584350U 一种反循环套铣筒 An anti-cylinder cycle Washover
05/07/2014CN103775017A 一种断杆的打捞方法及所用的侧捞器 A broken rod fishing methods and devices used for fishing side
05/07/2014CN103775016A 一种带台阶落鱼的打捞方法及所用的打捞筒 Salvage method and stepped off the fish used overshot
04/2014
04/30/2014CN203570249U External hook for drilling
04/30/2014CN203570248U Overshot capable of quitting
04/30/2014CN203570247U Hollow milling shoe with built-in sloping grain spiral grooves
04/30/2014CN203570246U Multilevel guiding tube guiding shoe connector
04/30/2014CN103758479A Overshot with slots for salvaging sucker rods
04/30/2014CN103758478A Wellbore sundry fishing anchor
04/29/2014US8708038 Pipe grapple
04/23/2014CN203559852U Fishing spearhead structure for fishing device
04/23/2014CN203559851U Connecting sleeve fixing structure of fisher
04/23/2014CN203559850U Jam releasing device for oilfield downhole drilling
04/23/2014CN203559849U Split type ball catcher for descaling balls for water injecting pipelines
04/23/2014CN203559848U Novel clamping-removing pipe structure
04/23/2014CN103742102A Preset packer and packing and fishing tool
04/23/2014CN103742095A Cylinder type gas well ground pipeline ball precipitator
04/17/2014WO2014058423A1 Fishing tool for drill pipe
04/17/2014WO2014058326A1 Downhole magnet, downhole magnetic jetting tool and method of attachment of magnet pieces to the tool body
04/16/2014CN203547631U Oil field underground salvager
04/16/2014CN203547630U Oil field underground salvager
04/16/2014CN203547629U Hydraulic assisting fishing tool
04/16/2014CN203547628U Tool for fishing cables in slim-hole well
04/16/2014CN102587860B Removable anti-blocking safety valve and special fishing tool for same
04/16/2014CA2830333A1 Tong bearing
04/15/2014US8695696 Jar with improved valve
04/10/2014WO2013102110A3 Internal pipe gripping tool
04/09/2014EP2715045A2 Tubular coupling device
04/09/2014CN203531819U Rotary fishing spear for downhole cable
04/09/2014CN203531818U Underground deblocking device
04/09/2014CN103711439A Quick coupler capable of preventing separation
04/08/2014US8689889 Downhole magnet tool and method of assembly
04/08/2014US8689878 Junk basket with self clean assembly and methods of using same
04/08/2014CA2767086C Hydraulic jar
04/03/2014WO2013117998A3 Compact fishing apparatus
04/02/2014CN203515431U Withdrawable fishing spear
04/02/2014CN203515430U Internal falling object fisher for short pipe
04/02/2014CN203515429U Novel oilfield fishing device for downhole fallen objects
04/02/2014CN203515428U Salvage spear
04/02/2014CN203515427U Retractable tubular dropping object fishing device for downhole operation
04/02/2014CN203515426U Retreated spiral slip bypass fishing device
04/02/2014CN203515425U Elastic jaw-type anti-falling device
04/02/2014CN203515424U Barefoot well jam release fishing tool
04/02/2014CN203515423U Electromagnetic type fishing device for well mouth falling objects
04/02/2014CN203515422U Small-caliber device for salvaging slag in drill hole
04/02/2014CN203515376U Hooking and dragging device for oil sucking rod
04/02/2014CN103696722A Small hole spring-shaped slip returnable fishing spear
04/02/2014CN103696721A Bottom boulder grab and rotary drilling rig
04/02/2014CN103696720A Composite unblocking method
04/02/2014CN103696719A Small-caliber drilling slag salvaging device
04/02/2014CN102373894B Feeding and refloating integrated type plunger tool and working method thereof
03/2014
03/26/2014CN203499613U Unconventional tube type fallen object fishing spear
03/26/2014CN203499612U Fishing spear special for packer
03/26/2014CN103670318A Central hole fishing system of whipstock
03/26/2014CN103670317A Simulation pipe string rigidity pigging method
03/20/2014WO2014042797A1 Retrievable connector for composite material sucker rod
03/19/2014CN203488135U Oil well displacing mud well dredging device
03/19/2014CN101988377B Energy storage type salvageable underground hydraulic impulse tool
03/18/2014US8672025 Downhole debris removal tool
03/13/2014WO2013085822A3 Resonant extractor system and method
03/13/2014US20140070558 Stretchable Elastomeric Tubular Gripping Device
03/13/2014US20140069649 Assembly and method for wide catch overshot
03/12/2014CN203476273U Fisher for wire-line coring drill bit
03/12/2014CN203476272U Hydraulic jet flow continuous vibration unfreezing device
03/12/2014CN203476271U Ground hydraulic drilling jar for deep well and extra-deep well
03/12/2014CN203476270U Cable fishing device of oil well
03/12/2014CN203476264U Recoverable drill-down blocking device in oil and gas field
03/12/2014CN102016224B Tubular running tool and methods of use
03/12/2014CN101545362B Latchable carrier assembly for pipe conveyed well logging
03/05/2014CN203463058U Branch well drifting tool
03/05/2014CN103615006A Plugging tool for high-pressure jet grouting method pile bottom slag discharging construction
03/05/2014CN101775977B Dual-tube injection well safety production string
02/2014
02/27/2014WO2014031116A1 Freeing pipe stuck in a subterranean well
02/27/2014US20140054090 Mechanical force generator for a downhole excitation apparatus
02/26/2014CN203452709U Flexible cable salvaging spear suitable for wellbore trajectory with small curvature radius
02/26/2014CN203452708U Catching device for objects falling into well
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