| Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780) |
|---|
| 01/31/2012 | US8105984 Reduced abrasion drilling fluid |
| 01/31/2012 | US8104501 Fluid handling system |
| 01/31/2012 | CA2503516C Method and system for circulating fluid in a well system |
| 01/26/2012 | WO2012010480A2 Drill pipe |
| 01/26/2012 | WO2012010061A1 Method for circulatory use of foam in foam drilling by means of low-carbon alcohol |
| 01/26/2012 | CA2805848A1 Drill pipe |
| 01/25/2012 | EP2408992A2 Method and device for drilling shafts in ground layers consisting of rock, clay and/or related materials |
| 01/25/2012 | CN202125267U Concentrated medicine supply device for environment-friendly waste drilling mud processing equipment |
| 01/25/2012 | CN202125266U Windproof drilling fluid material feeding device |
| 01/25/2012 | CN202125265U Dedusting device |
| 01/25/2012 | CN202125247U Fully-electric composite continuous pipe drilling device |
| 01/25/2012 | CN102330545A Oil well sand prevention method for heavy oil reservoir |
| 01/25/2012 | CN102330542A Water tap device for oil rig |
| 01/25/2012 | CN102330536A Lifting type diving rotary drilling rig with turbine pump |
| 01/24/2012 | US8101555 Spotting fluids containing syrups |
| 01/24/2012 | US8100198 Cuttings treatment and reuse |
| 01/24/2012 | US8100184 Collection and lift modules for use in a wellbore |
| 01/24/2012 | US8100174 Drill fluid collecting device and method of use |
| 01/24/2012 | CA2727814C System and method for automated application of inoculants onto forage material |
| 01/24/2012 | CA2423762C Cement shoe assembly for monobore well |
| 01/23/2012 | CA2747042A1 Apparatus and method for abrasive perforating and cleanout using a multi-cycle open/close valve |
| 01/19/2012 | WO2012008844A1 Sieve device for untreated drilling mud and a method of using same |
| 01/19/2012 | WO2011146549A9 Method for drilling through nuisance hydrocarbon formations |
| 01/19/2012 | WO2011146169A3 System and method for regulating pressure within a well annulus |
| 01/19/2012 | WO2011106514A3 Cleaning apparatus and method for a material dryer |
| 01/19/2012 | US20120013335 Method of adjusting properties of drilling fluids and apparatus for use in such methods |
| 01/19/2012 | CA2804972A1 Sieve device for untreated drilling mud and a method of using same |
| 01/18/2012 | CN202119483U Contactless mud flow sensor for oilfield |
| 01/18/2012 | CN202117648U One-level two-segment insert-seal injection-divided tubular pile capable of backwashing wells |
| 01/18/2012 | CN202117647U Anti-flow-splitting bridge type eccentric water distributor for well cleanup |
| 01/18/2012 | CN202117598U Foam generating device for oil field |
| 01/18/2012 | CN202117597U Dust collecting device of down-the-hole drill |
| 01/18/2012 | CN202117596U Submersible pump type well drilling machine |
| 01/18/2012 | CN202117555U Hammer head rotation mechanism |
| 01/18/2012 | CN102322232A Borehole sand-washing string and sand-washing method |
| 01/18/2012 | CN102116140B Construction method for enhancing extraction effect of ground coal bed gas |
| 01/17/2012 | US8096371 Method and apparatus for disposal of cuttings |
| 01/12/2012 | WO2012006457A1 Circulation sub and method for using same |
| 01/12/2012 | WO2012006344A2 Dual-flow valve and swivel |
| 01/12/2012 | CA2804936A1 Circulation sub and method for using same |
| 01/12/2012 | CA2804400A1 Dual-flow valve and swivel |
| 01/11/2012 | EP2404030A2 Wellbore strengthening material recovery |
| 01/11/2012 | CN202108486U Two-stage three-section inserting, sealing and dispersing tubular column capable of backwashing well |
| 01/11/2012 | CN202108438U Oil well cleanup switching device |
| 01/11/2012 | CN202108437U Bypass valve of screw drill capable of memorizing working time |
| 01/11/2012 | CN202108436U Hydraulic auto-rotation jet head for washing well |
| 01/11/2012 | CN202108414U High-pressure post-positioned water swivel |
| 01/11/2012 | CN202108413U Crushing mechanism |
| 01/11/2012 | CN202105746U Nozzle for cleaning an oil and water well |
| 01/11/2012 | CN102312659A Pollution-free well workover process for oil field |
| 01/10/2012 | US8091653 Methods of formulating weighting agents using processed waste waters |
| 01/10/2012 | CA2723012C Apparatus and method for drilling a wellbore with casing and cementing the casing in the wellbore |
| 01/10/2012 | CA2672669C Methods for producing even wall down-hole power sections |
| 01/05/2012 | WO2011140635A3 Systems and methods for drying drill cuttings |
| 01/05/2012 | US20120000710 System and Method for Soil Saturation and Digging |
| 01/05/2012 | CA2803542A1 Surfactant additives used to retain producibility while drilling |
| 01/04/2012 | CN202100219U Continuous fluid circulating valve |
| 01/04/2012 | CN202100218U Filter capable of preventing blockage of bit nozzle |
| 01/04/2012 | CN102305059A Automatic control system and method of petroleum drilling machine |
| 01/04/2012 | CN102305021A Experimental method for simulating dynamic mechanics characteristic of underground drilling rig of air well drilling |
| 01/04/2012 | CN101363311B Technological process for comprehensive treatment for waste drilling fluid following drill for oil-gas field |
| 01/03/2012 | CA2673849C Drilling components and systems to dynamically control drilling dysfunctions and methods of drilling a well with same |
| 01/03/2012 | CA2580177C Rotating control head radial seal protection and leak detection systems |
| 01/03/2012 | CA2466939C An improved transmission sleeve |
| 01/03/2012 | CA2466538C System for degassing muds and for analysing the gases contained in the muds |
| 12/29/2011 | WO2011161250A2 Fluid partition unit |
| 12/29/2011 | WO2011095600A3 Method of conducting well operations |
| 12/29/2011 | WO2011036556A3 Multiple process service vessel |
| 12/29/2011 | CA2803674A1 Screening methods and apparatus |
| 12/29/2011 | CA2802286A1 Fluid partition unit |
| 12/28/2011 | EP2398997A2 Device for passive pressure sealing |
| 12/28/2011 | CN202090873U 潜孔钻湿式除尘装置 DTH drilling wet dust removal device |
| 12/28/2011 | CN202090872U 打钻孔除尘器 Playing drilling dust |
| 12/28/2011 | CN202090871U Electric drill dust cover |
| 12/28/2011 | CN202090851U 一种泥浆对注接头 One kind of mud on the Notes Connector |
| 12/28/2011 | CN202090830U 带万向铰接副的多功能简易动臂双折液压钻机 Vice versatility with simple universal hinged bi-fold boom hydraulic drill |
| 12/28/2011 | CN102296937A 一种湿式孔口涡流集控尘装置及方法 A wet orifice dust vortex centralized control device and method |
| 12/28/2011 | CN102296933A 微型折叠式自动钻井机 Miniature folding automatic drilling machine |
| 12/28/2011 | CN102296932A 落地式室内天棚混凝土板底钻孔机构 Floor-to-ceiling interior concrete slab bottom drilling agency |
| 12/28/2011 | CN102296929A 非开挖导向钻机用搅泥沙器 Trenchless-oriented drills, stir sediment control |
| 12/28/2011 | CN101265788B 一种y管防污染方法及其装置 One kind of pollution y tube method and device |
| 12/28/2011 | CN101245694B 井下钻井液分离装置 Downhole drilling fluid separation device |
| 12/27/2011 | US8082982 Methods and devices for forming a wellbore with casing |
| 12/25/2011 | CA2708835A1 A system and method for cleaning a bottom-hole formation zone of a wellbore |
| 12/23/2011 | CA2708191A1 Completion technique and treatment of drilled solids |
| 12/22/2011 | WO2011140238A3 Modular bellows with instrumentation umbilical conduit for electrical submersible pump system |
| 12/22/2011 | WO2011057774A3 Integrated choke manifold system for use in a well application |
| 12/22/2011 | US20110308860 Continuous Circulating Sub for Drill Strings |
| 12/21/2011 | EP2396498A1 Autochoke system |
| 12/21/2011 | EP2396279A2 Compact wastewater concentrator using waste heat |
| 12/21/2011 | EP2179124B1 Continuous flow drilling systems and methods |
| 12/21/2011 | CN202081844U 双管冲砂井内换向阀 Valve twin-tube wells washed sand |
| 12/21/2011 | CN202081843U 钻井液泥浆真空加料器 Drilling mud vacuum feeder |
| 12/21/2011 | CN202081821U 全液压一体化多用途切削钻机 Integrated multi-purpose cutting hydraulic rig |
| 12/21/2011 | CN1891971B 可充电动力系统及可充电燃料电池 Rechargeable power systems and rechargeable fuel cell |
| 12/21/2011 | CN102287179A 可洗井存储式井下视像检测装置 Well washable storage downhole video detection device |
| 12/21/2011 | CN102287157A 多功能压井放喷管汇 Multifunction kill put the nozzle sinks |
| 12/21/2011 | CN102287152A 一种旋转喷射清砂方法 A rotating jet sand method |
| 12/20/2011 | CA2546690C Device for removal and filtration of drilling fluid |
| 12/20/2011 | CA2534502C Drilling system and method |