| Patents for E21B 31 - Fishing for or freeing objects in boreholes or wells (3,788) |
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| 03/05/2015 | US20150060046 Tools and methods useful with wellbore reverse circulation |
| 03/03/2015 | US8967246 Downhole actuator |
| 03/03/2015 | US8967241 Junk basket with self clean assembly and methods of using same |
| 02/25/2015 | EP2840226A2 Signal operated tools for milling, drilling, and/or fishing operations |
| 02/19/2015 | US20150047854 Electrical bulkhead connector |
| 02/19/2015 | US20150047845 Method for Removal of Casings in an Underground Well |
| 02/19/2015 | US20150047838 Technique and apparatus to form a downhole fluid barrier |
| 02/17/2015 | US8955590 Overshot device |
| 02/17/2015 | CA2722612C Signal operated tools for milling, drilling, and/or fishing operations |
| 02/12/2015 | WO2015020748A2 Automatic driller |
| 02/12/2015 | US20150041137 Automatic driller |
| 02/12/2015 | US20150041124 Automatic packer |
| 02/11/2015 | CN104343436A 一种通井洗井水泥胶结固井质量测井一体化装置及方法 One kind of flushing through well cementing quality cement bond logging integrated device and method |
| 02/11/2015 | CN104343406A 水平定向钻抢险装置及其应用方法 Horizontal directional drilling equipment and its application method and rescue |
| 02/10/2015 | US8950477 Hydraulic jar |
| 02/05/2015 | WO2015017698A1 Clutch apparatus and method for resisting torque |
| 02/05/2015 | US20150034321 Downhole Spear Having Mechanical Release Mechanism for Use in Wellbores and Methods of Using Same |
| 02/04/2015 | CN204140049U 可自主控制式电子熔断释放装置 Can independently control the electronic fuse release device |
| 02/04/2015 | CN204140011U 可退式倒扣捞筒 Releasing tube upside down fishing |
| 02/04/2015 | CN104329041A 一种脱扣震击解卡方法 One kind of trip Shock stuck methods |
| 02/04/2015 | CN104329040A 起长井段射孔枪工艺及专用装置 Nagai segment from gun technology and special equipment |
| 02/04/2015 | CN102747973B 井下钻孔取芯机 Underground core drilling machine |
| 01/28/2015 | CN204126591U 带压作业尾管循环封堵成套装置 Pressure job blocking circulation tailpipes complete unit |
| 01/28/2015 | CN204126587U 一种凿岩台车取杆器 One kind of drill rig is to take pole |
| 01/28/2015 | CN204126586U 偏磨鱼顶外捞打捞筒 Partial top outer wear fish fishing overshot |
| 01/28/2015 | CN204126585U 一种卡簧式小件落物打捞筒 Small pieces of one kind of retainer litter overshot |
| 01/28/2015 | CN204126584U 油水井维修打捞作业装置 Oil wells repair equipment salvage operations |
| 01/28/2015 | CN204126583U 一种强磁打捞器 One kind of magnetic fisher |
| 01/28/2015 | CN104314503A 一种连续油管落鱼专用打捞筒 A continuous tubing off the fish special overshot |
| 01/28/2015 | CN104314502A 井下试井作业电子压力计悬挂器打捞器 Downhole well testing electronic pressure gauge hanger fisher |
| 01/28/2015 | CN104314501A 一种滑块式捞筒 A slider in style fishing barrel |
| 01/28/2015 | CN104314500A 井下钻具解卡装置及井下钻具解卡方法 Downhole drilling equipment and downhole drill stuck stuck methods |
| 01/28/2015 | CN104314494A 用于筛管或尾管的悬挂器 For screen or tail pipe hanger |
| 01/28/2015 | CN104310124A 卷绳器、石油仪器打捞系统及石油仪器吊装系统 Volume rope, oil equipment and oil equipment salvage systems Lifting systems |
| 01/27/2015 | CA2662762C Method of and system for determining the free point in a drill pipe |
| 01/21/2015 | CN204113177U 液压可退式倒扣打捞器 Hydraulic Releasing Flip fisher |
| 01/21/2015 | CN204113176U 一种煤层气井打捞工具 One kind of fishing tools CBM wells |
| 01/21/2015 | CN204113175U 一种组合式打捞筒 A modular overshot |
| 01/21/2015 | CN204113174U 一种一次投球即可实现多级、连续震击的震击器 A once-pitching to achieve multi-level, continuous Shock jar |
| 01/21/2015 | CN204113173U 一种半剖式强磁打捞器 A semi-cross-type magnetic fisher |
| 01/21/2015 | CN204113172U 可旋转式连续油管用井下作业打捞工具 Rotatable with coiled tubing downhole fishing tool operations |
| 01/21/2015 | CN204113169U 磨铣打捞器 Milling fisher |
| 01/21/2015 | CN204113164U 一种斜井投送支撑装置及气举阀井下投捞器 One kind of inclined to support the delivery device and downhole gas lift valve and pulling devices |
| 01/21/2015 | CN104295258A 新型通井刮壁一体作业通井规及作业管柱 The new wells scraper pass through one job well regulated and work string |
| 01/21/2015 | CN104295257A 一种机械解堵抽油管柱 A mechanical plugging pumping string |
| 01/21/2015 | CN102661145B 一种不起钻可更换式电磁波无线随钻测量系统 One kind of electromagnetic waves can not afford to drill replaceable wireless MWD system |
| 01/14/2015 | EP2823133A1 Method for removal of casings in an underground well |
| 01/14/2015 | CN204098838U 一种套铣打捞一体化修井工具 One kind Washover salvage workover tools integration |
| 01/14/2015 | CN204098837U 捞管 Fishing tube |
| 01/14/2015 | CN204098836U 可变单流道铣捞管柱 Single Channel Variable column milling fishing |
| 01/14/2015 | CN204098835U 一种打捞井下落鱼的工具 One kind of fish salvage wells whereabouts tools |
| 01/14/2015 | CN204098829U 一种偏心配水器堵塞器投捞工具 One kind of eccentric water clogged filter and pulling tool |
| 01/07/2015 | EP2820234A2 Holding clamp consisting of a device for locking and/or unlocking a tool head, such as a core bit |
| 01/07/2015 | CN204082069U 外钩式绳类打捞装置 Outside hook rope salvage device |
| 01/07/2015 | CN204082068U 油田作业打捞清砂装置 Oilfield operations equipment salvage sand |
| 01/07/2015 | CN204082067U 一种管柱解卡装置 One kind of string solution card device |
| 01/07/2015 | CN204082066U 煤层气井尾管打捞合并作业特种工具 CBM wells tailpipe salvage special tools merge jobs |
| 01/07/2015 | CN204080811U 一种移动式拔管机 A mobile extubation |
| 01/07/2015 | CN104265225A 应用于绳索取心钻进的打捞锚及打捞法 Applied to the rope coring drilling anchors and salvage salvage law |
| 01/07/2015 | CN104265224A 一种油井卡钻物体定向爆燃冲击破坏分离的快速解卡装置 One kind of object oriented oil sticking deflagration impact damage stuck fast separation device |
| 01/07/2015 | CN104265223A 一种机械解堵装置 A mechanical plugging device |
| 01/07/2015 | CN102459805B 打捞筒设备 Overshot equipment |
| 01/01/2015 | US20150000896 Debris Chamber with Helical Flow Path for Enhanced Subterranean Debris Removal |
| 01/01/2015 | US20150000892 Downhole-Adjusting Impact Apparatus and Methods |
| 12/31/2014 | CN204060599U 裸眼井井下作业打捞装置 Openhole Downhole salvage device |
| 12/31/2014 | CN204060598U 井内异物夹取装置 Wells foreign body gripping means |
| 12/31/2014 | CN204060597U 绳套式钻具打捞器 Rope-type drill fisher |
| 12/31/2014 | CN204060596U 一种井下解卡液压增力器 A downhole hydraulic stuck energizer |
| 12/24/2014 | CN204040976U 一种油井打捞装置 One kind of oil salvage device |
| 12/24/2014 | CN204040975U 改进的公锥 Improved public cone |
| 12/24/2014 | CN204040974U 断杆振荡式多级打捞筒 Off lever oscillation multistage overshot |
| 12/24/2014 | CN204040973U 一种油管组合打捞筒 One kind of combination tubing overshot |
| 12/24/2014 | CN204040972U 一种油气水井打捞器 One kind of oil and gas wells fisher |
| 12/24/2014 | CN204040971U 一种旁通式防沉砂捕球器 One kind of bypass-type anti-grit catching the ball is |
| 12/24/2014 | CN204040970U 通井规 Well pass regulation |
| 12/24/2014 | CN204040941U 打捞套管专用扶正工具 Salvage special casing centralizer tool |
| 12/24/2014 | CN104234654A 一种井下液压震击解卡装置 A downhole hydraulic shock solution card device |
| 12/24/2014 | CN104234653A 一种水井捕捞装置 Well one kind of fishing equipment |
| 12/23/2014 | US8915298 Slickline or wireline run hydraulic motor driven mill |
| 12/17/2014 | CN204024562U 采油井用打捞装置 Production wells with salvage equipment |
| 12/17/2014 | CN204024561U 油井作业井下打捞装置 Downhole oil well operations salvage device |
| 12/17/2014 | CN204024560U 一种滑动式测斜仪测头打捞装置 A sliding inclinometer probe salvage device |
| 12/17/2014 | CN204024559U 油井采油打捞装置 Oil wells salvage device |
| 12/17/2014 | CN204024558U 压裂井口捕球器 Fracturing wellhead is catching the ball |
| 12/17/2014 | CN204024557U 侧开式强磁打捞器 Side opening magnetic fisher |
| 12/17/2014 | CN204024556U 绳类通井规 Rope through well regulated |
| 12/17/2014 | CN204024555U 自动泄压式液压打捞装置 Auto salvage hydraulic pressure relief device |
| 12/17/2014 | CN204024553U 采油通井捞砂装置 Oil through wells bailing device |
| 12/11/2014 | US20140360724 Wireline Hydraulic Driven Mill Bottom Hole Assemblies and Methods of Using Same |
| 12/10/2014 | CN204002670U 一种新型勘探测井用非连续性可重复使用打捞矛 A new exploration well logging discontinuity reusable spear |
| 12/10/2014 | CN204002669U 套管对扣打捞器 Casing buckle fisher |
| 12/10/2014 | CN204002668U 井下轻落物捞获辅助工具 Underground light litter salvaged aids |
| 12/10/2014 | CN204002659U 一种多功能桥塞投送器 A multifunctional bridge plug delivery device |
| 12/10/2014 | CN104196482A 一种打捞煤层气井双抽油杆等高事故头工艺 An accident salvage craft CBM wells double sucker head high |
| 12/10/2014 | CN104196481A 一种水平井倒扣解卡方法 A horizontal well stuck upside down method |
| 12/04/2014 | US20140352976 Method And An Apparatus For Retrieving A Tubing From A Well |
| 11/25/2014 | US8893791 Multi-position mechanical spear for multiple tension cuts with releasable locking feature |
| 11/11/2014 | US8881835 Manipulator tool and tool catcher useful with wellbore reverse circulation |
| 10/28/2014 | US8869896 Multi-position mechanical spear for multiple tension cuts while removing cuttings |
| 10/23/2014 | US20140311757 Pulling tool |