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 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780)
01/2003
01/09/2003US20030006202 Method for handling, processing and disposing of drill cuttings
01/09/2003US20030006201 Separating drill cuttings from drilling mud, transporting cuttings to compactor, compacting, filling storage bags with compacted bodies, delivering to storage location
01/09/2003US20030006043 Internal blow-out preventer change-out tool
01/08/2003CN1389538A Method for fracturing rock-layer underground
01/07/2003US6503337 Removal of oil and chloride from oil contaminated material
01/02/2003US20030000740 Subsea well intervention vessel
01/02/2003US20030000704 Method and apparatus for displacing drilling fluids with completion and workover fluids, and for cleaning tubular members
01/02/2003EP1268032A2 A screen assembly, a support structure, a method of making same and a vibratory shaker
01/02/2003EP1169406A4 Method of releasing stuck pipe or tools and spotting fluids therefor
01/02/2003EP1161511A4 Aphron-containing oil base fluids and method of drilling a well therewith
01/02/2003EP1131533A4 Tubular filling system
12/2002
12/31/2002US6499546 Buffered well fluids
12/31/2002US6499540 Method for detecting a leak in a drill string valve
12/27/2002WO2002102922A1 Shale hydration inhibition agent and method of use
12/26/2002US20020195253 Method and apparatus for open hole gravel packing
12/24/2002US6497295 Torque limiting tool
12/24/2002US6497291 Float valve assembly and method
12/24/2002US6497290 Method and apparatus using coiled-in-coiled tubing
12/19/2002WO2002101191A2 Packing assembly for rotary drilling swivels
12/19/2002US20020189814 Automatic tubing filler
12/19/2002US20020189139 Vacuum boring and mud recovery system
12/17/2002US6494264 Wellbore flow control device
12/11/2002EP1264073A1 Downhole surge pressure reduction and filtering apparatus
12/11/2002EP1264072A1 Method and arrangement for reducing dust-related problems in rock drilling
12/11/2002EP1264069A2 Wellbore circulation system, kelly bushing, kelly and tong
12/11/2002EP1064451B1 Pressure actuated downhole tool
12/10/2002US6491421 Fluid mixing system
12/04/2002EP1214496A4 Electrical surface activated downhole circulating sub
12/03/2002US6488094 Method and apparatus for shutting off upward flow from a conduit
12/03/2002US6488092 By-pass valve
12/03/2002US6488085 Method and apparatus for well logging and well control
11/2002
11/28/2002US20020175111 Vibratory separator
11/28/2002US20020174988 Fill up tool and mud saver for top drives
11/27/2002EP1260744A1 Valve for enabling the controls of a fluid-operated actuator
11/27/2002EP1260671A1 Check valve for rig top drive
11/26/2002US6484823 Rock drill bit and a check valve therefor
11/26/2002US6484816 Method and system for controlling well bore pressure
11/26/2002US6484800 Downhole flow control devices
11/24/2002CA2387195A1 Fill up tool and mud saver for top drives
11/21/2002WO2002093094A1 Process and means for drying of sticky materials
11/21/2002WO2002092187A1 Process and arrangement for separating oil from oil containing materials
11/21/2002WO2002064942A3 Downhole packer
11/21/2002WO2002064699A3 Oleaginous drilling fluid, method of use and bio-remediation of the same to produce a useful soil amendments
11/21/2002US20020170749 Method of dynamically controlling bottom hole circulation pressure in a wellbore
11/20/2002CN2521377Y Anti pollution continuous flushing sand tubular column
11/20/2002CN2521376Y 水龙头大钩 Faucet hook
11/19/2002US6482866 Viscoelastic surfactant fluids and related methods of use
11/19/2002US6481511 Rotary drill bit
11/19/2002US6481501 Method and apparatus for drilling and completing a well
11/19/2002CA2257377C Core machine
11/14/2002WO2002068793A8 Ball activated tool for use in downhole drilling
11/14/2002US20020166665 Zero drill completion and production system
11/13/2002EP1256691A2 Fill-up and circulation tool with torque assembly
11/13/2002CN1094170C 钻井泥浆及钻屑的处理装置 Drilling mud and drill cuttings treatment device
11/07/2002WO2002088522A1 Method, system and tool for reservoir evaluation and well testing during drilling operations
11/07/2002WO2002088514A1 Automatic tubing filler
11/07/2002WO2002088513A1 Flow control apparatus for use in a wellbore
11/07/2002WO2002088506A2 Apparatus and method for treatment of waste products
11/07/2002WO2002042647A3 Hydraulic drill string accumulator
11/07/2002CA2448404A1 Method, system and tool for reservoir evaluation and well testing during drilling operations
11/06/2002EP0995011B1 Improved method and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing
11/05/2002US6474422 Method for controlling a well in a subsea mudlift drilling system
11/05/2002US6474418 Wellbore fluid recovery system and method
10/2002
10/31/2002WO2002086280A1 Method of recycling water contaminated oil based drilling fluid
10/31/2002US20020157838 Continuous circulation drilling method
10/31/2002US20020157837 Flow control apparatus for use in a wellbore
10/29/2002US6472068 Glass rupture disk
10/29/2002US6470980 Self-excited drill bit sub
10/29/2002US6470978 Fluid drilling system with drill string and retro jets
10/29/2002US6470975 Internal riser rotating control head
10/29/2002CA2071683C Apparatus and facilities for cleaning drains, especially in an oil well
10/24/2002WO2002084067A1 Method of dynamically controlling bottom hole circulation pressure in a wellbore
10/24/2002WO2002083264A1 Method and apparatus for analyzing casing wear and retrieval of metallic fragments
10/24/2002WO2002046565A3 Speed governor
10/24/2002WO2002034358A3 A screen for a shale shaker
10/24/2002US20020154028 Casing mounted sensors, actuators and generators
10/24/2002US20020154027 Casing mounted sensors, actuators and generators
10/24/2002US20020153311 Absorbent materials and production thereof
10/24/2002US20020153138 Downhole cementing system
10/23/2002EP1084325B1 Arrangement for the removal of cuttings and gas arising from drilling operations
10/23/2002EP0841982B1 Improvements in or relating to ultrasonic processors
10/23/2002CN2517858Y Polymodel current appts.
10/22/2002US6467558 Multiple air hammer apparatus and excavating direction correcting method therefor
10/22/2002US6467546 Drop ball sub and system of use
10/17/2002WO2002081856A1 Method for drilling and drilling apparatus
10/17/2002WO2002081593A1 Humic mineral ameliorant, method for the production thereof and method for rehabilitating rugged soils and lands
10/17/2002WO2002046564A3 Boring apparatus
10/17/2002US20020149501 Casing mounted sensors, actuators and generators
10/17/2002US20020149500 Casing mounted sensors, actuators and generators
10/17/2002US20020149499 Casing mounted sensors, actuators and generators
10/17/2002US20020148645 Stalled motor by-pass valve
10/17/2002US20020148615 PDF valve
10/17/2002US20020148614 PDF valve
10/16/2002CN2516753Y Differential mechanism of drilling fluid centrifuge
10/16/2002CN2516687Y Puddle mixer for preventing drilling rock-fragment forming talus deposite
10/16/2002CN2516686Y 深井冲砂工具 Deep red sand tool
10/10/2002WO2002078866A1 A screen assembly for a vibratory separator
10/10/2002US20020147113 Ground raw base material that is compressed into a higher density pellet that is used an additive for lost circulation, seepage control, fluid loss and control of lubricity, viscosity and rheology in drilling
10/10/2002US20020144717 Critical and supercritical cleaning of hydrocarbon-containing materials
10/10/2002US20020144545 Method and apparatus for analyzing casing wear and retrieval of metallic fragments
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