| Patents for E21B 12 - Accessories for drilling tools (993) |
|---|
| 08/08/2012 | CN202370436U Pumping device for removing dregs from bottom of pile foundation hole |
| 08/01/2012 | CN202360033U Rotary digging drill tool capable of automatically discharging slag |
| 08/01/2012 | CN102619472A Backward-flowing prevention air hammer drill for foam drilling |
| 07/25/2012 | CN202348122U Soil cleaning device and drilling machine thereof |
| 07/25/2012 | CN202348121U Drill top sleeve for oil drilling and exploring machinery |
| 07/18/2012 | CN102587834A Drilling tool and piling machinery |
| 07/17/2012 | CA2512540C Wireline stripper for attachment to drill pipe |
| 07/11/2012 | CN202325252U 钻头恒扭矩保护器 Constant torque drill protection |
| 06/28/2012 | WO2012047861A3 Wear-out detection methods for printed circuit board assembly components used in downhole oilfield environments |
| 06/27/2012 | CN101775965B Open-top composite clamp holder |
| 06/21/2012 | US20120152621 Offset Rock Bit With Pull Back Adapter |
| 06/21/2012 | US20120152618 Method and apparatus for detection of drill bit wear |
| 06/21/2012 | US20120152617 Real Time Bit Monitoring |
| 06/13/2012 | CN102493762A Rectangular cast-in-place pile slotting combined drilling rig |
| 06/06/2012 | CN102486083A Well drilling corrector |
| 05/23/2012 | CN202227974U Rotary pit drilling device |
| 05/22/2012 | US8185366 Methods for modeling, displaying, designing, and optimizing fixed cutter bits |
| 05/08/2012 | US8172008 Drilling apparatus with reduced exposure of cutters and methods of drilling |
| 05/08/2012 | CA2618311C Apparatus and method for stabilization of downhole tools |
| 05/02/2012 | CN202209144U Sealing structure for power head of rotary drilling rig |
| 05/02/2012 | CN102434110A High-speed turbine section for turbine drilling tool |
| 04/25/2012 | CN202202815U 螺旋钻杆旋转n个360°自动除泥机械装置 Spiral drill a 360 ° rotation n mechanical device automatically desilter |
| 04/12/2012 | WO2012047861A2 Wear-out detection methods for printed circuit board assembly components used in downhole oilfield environments |
| 04/11/2012 | CN102409968A 横向液压钻孔机 Lateral hydraulic drilling machine |
| 03/28/2012 | CN102392606A Soil cleaning device and drilling machine as well as use method of soil cleaning device |
| 03/21/2012 | EP2431565A1 Hard metal head for a tool for processing solid material |
| 03/16/2012 | CA2714850A1 Weight-on-bit drill sub |
| 03/14/2012 | CN202165018U 一种螺旋钻孔灌注桩机的清土器 Bored machine in a spiral clean earthenware |
| 03/14/2012 | CN102373883A Diving rock inserting drill rig |
| 03/13/2012 | CA2635089C Filtering and detection of telemetry |
| 02/16/2012 | WO2011109075A9 Dual top drive systems and methods |
| 02/08/2012 | CN202140025U 钻机用安全垫叉 Drills, safety mats fork |
| 02/02/2012 | US20120024609 Drilling apparatus with reduced exposure of cutters and methods of drilling |
| 01/18/2012 | CN202116568U Plug-in type sealed drill bushing |
| 01/04/2012 | EP2401466A1 Methods and apparatuses for estimating drill bit condition |
| 01/04/2012 | CN202100204U Anti-leakage orifice support device |
| 01/04/2012 | CN102305023A Automatic mud removal mechanical device with spiral drill rod rotating N 360 degrees |
| 01/03/2012 | CA2466939C An improved transmission sleeve |
| 12/29/2011 | WO2011109075A3 Dual top drive systems and methods |
| 12/28/2011 | CN102296930A 一种带检测金属管道的智能环保挖机钻头 A tape detection of metal pipes intelligent environmental digging machine drill |
| 12/14/2011 | EP2394022A2 Method and apparatus for collecting drill bit performance data |
| 12/14/2011 | CN1214755B 调节钻井参数的方法 Adjust drilling parameters method |
| 12/14/2011 | CN102278070A 钻压稳定器 WOB Stabilizer |
| 12/14/2011 | CA2706803A1 Portable materials handling apparatus |
| 12/08/2011 | WO2011153004A2 Early wear detection |
| 12/01/2011 | US20110290560 Early wear detection |
| 11/30/2011 | CN202055760U 螺旋钻孔机的排土装置 Dump device auger boring machines |
| 11/29/2011 | US8066084 Drilling apparatus with reduced exposure of cutters and methods of drilling |
| 11/22/2011 | CA2582386C A pipe joint lubrication device |
| 11/03/2011 | US20110266054 At-Bit Evaluation of Formation Parameters and Drilling Parameters |
| 11/02/2011 | CN102230043A Plug-in-type sealing drill bushing |
| 10/26/2011 | CN202017457U Block removing device for oil well drilling tool water hole |
| 10/13/2011 | WO2011123935A1 Apparatus and method for stripping solids and fluids from a string used in drilling or servicing wells |
| 10/12/2011 | CN202007630U Resistance-reducing and torsion-reducing device |
| 10/05/2011 | EP1340069B1 Spectral power ratio method and system for detecting drill bit failure and signaling surface operator |
| 10/05/2011 | CN202000905U Non-contact drill stem desilter |
| 10/05/2011 | CN202000895U Blade jam release safety structure for hydraulic reamer |
| 09/14/2011 | CN201972607U 用于水钻的可调节肩托 For rhinestone adjustable shoulder rest |
| 08/30/2011 | US8006781 Method of monitoring wear of rock bit cutters |
| 08/30/2011 | CA2657211C Downhole abrading tools having a hydrostatic chamber and uses therfor |
| 08/25/2011 | US20110206492 Downhole tool protector apparatus and method |
| 08/18/2011 | US20110198131 Core barrel assemblies with braking devices |
| 08/17/2011 | EP2356306A1 Real time dull grading |
| 08/17/2011 | CN201934029U 钻具减摩防粘减磨工具 Drill friction release by grinding tool |
| 08/10/2011 | EP2352896A2 Method of monitoring wear of rock bit cutters |
| 08/10/2011 | CN201924835U 抗冲击螺杆钻具 Shock screw drill |
| 08/09/2011 | CA2586609C Generating a geometric database of coiled tubing for use in designing service of the coiled tubing |
| 08/04/2011 | WO2011091500A1 Bearing assembly |
| 08/04/2011 | US20110186284 Shock Reduction Tool for a Downhole Electronics Package |
| 08/04/2011 | CA2779159A1 Bearing assembly |
| 08/03/2011 | EP2350422A1 Downhole tool protector apparatus and method |
| 08/03/2011 | CN201915846U 一种钻头加速器 A drill Accelerator |
| 07/13/2011 | CN201896584U Well drilling corrector |
| 07/12/2011 | CA2620905C Method and apparatus for determining destructive torque on a drilling assembly |
| 06/29/2011 | CN201883942U Double-loop-type anti-falling device of air hammer drill bit |
| 06/29/2011 | CN201883937U Sand-preventive and deviation-preventive screw drilling rig |
| 06/22/2011 | CN201874474U Anti-falling device under novel torsional-impact drilling tool |
| 06/22/2011 | CN201874448U Torsional impact transmission device |
| 06/22/2011 | CA2725976A1 Analyzing toolface velocity to detect detrimental vibration during drilling |
| 06/01/2011 | CN201851019U Anti-run drill |
| 05/19/2011 | US20110114392 Drilling apparatus with reduced exposure of cutters and methods of drilling |
| 05/18/2011 | CN201835754U Impact drill bit falling prevention device for gas drilling |
| 05/18/2011 | CN102061888A Impact-resistant screw drill tool |
| 05/11/2011 | CN201828928U Oil field managed object based on identification system with two-dimensional code technology |
| 04/27/2011 | CN201810207U Rotary excavation drilling machine and rotary excavation drilling tool thereof |
| 04/13/2011 | CN201794520U Soil removing device of spiral drill rod |
| 04/13/2011 | CN201794519U Damage-resistant driller |
| 04/06/2011 | CN201786267U Drill cover of rotary drill |
| 04/05/2011 | CA2610957C Method and apparatus for collecting drill bit performance data |
| 03/24/2011 | WO2010091239A4 Method and apparatus for collecting drill bit performance data |
| 03/23/2011 | CN201771432U Bore hole cleaner |
| 03/16/2011 | EP2295705A2 Abrasion detecting apparatus detecting abrasion of component of cutter head and tunnel boring machine including abrasion detecting apparatus |
| 02/24/2011 | WO2011020196A1 An apparatus and method for containing fluid or gas released from a pipe |
| 02/24/2011 | WO2010129526A3 Methods and apparatuses for measuring drill bit conditions |
| 02/16/2011 | CN201747281U Improved grease filling device |
| 02/10/2011 | US20110030983 Power tool |
| 02/09/2011 | CN201738817U Sash weight machine for clamped and buried drilling tools |
| 02/09/2011 | CN101970786A Method and separation conduit for handling lubricant mist, and rock drilling rig |
| 01/27/2011 | WO2010091239A3 Method and apparatus for collecting drill bit performance data |
| 01/20/2011 | CA2820193A1 Downhole casing cutting tool |