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)
11/2011
11/09/2011	CN202031506U Novel washout valve
11/09/2011	CN202031505U Rotary sand washing device for oil and water well
11/09/2011	CN202031491U Oil well sand flushing tube-rod coupling
11/09/2011	CN202031480U Silt stirrer for non-excavation guide drilling machine
11/03/2011	WO2011136761A1 Wellbore pressure control with segregated fluid columns
11/03/2011	WO2011135178A1 Device for a hydraulic hammer
11/03/2011	WO2011134044A1 System and method for land application of waste fluids
11/03/2011	WO2011091140A3 Ball drop module
11/03/2011	WO2011087673A3 Wireline-adjustable downhole flow control devices and methods for using same
11/03/2011	US20110266065 Device for the quantitative analysis of debris
11/03/2011	US20110265993 Sand decanter
11/03/2011	CA2795910A1 Wellbore pressure control with segregated fluid columns
11/02/2011	EP2382368A1 Method and apparatus for down-the-hole drilling
11/02/2011	CN202023520U Cyclone sand washing device
11/02/2011	CN202023499U Piling machine for holing through rotary pump
11/02/2011	CN102230363A Device and method for drilling and forming hole in coal rock in structural belt
11/01/2011	USRE42877 Methods and apparatus for wellbore construction and completion
11/01/2011	CA2712543C Rotating control device, cool fluid circulation system and methods of operation
11/01/2011	CA2689630C The use of sized barite as a weighting agent for drilling fluids
11/01/2011	CA2671374C Controlling transient pressure conditions in a wellbore
11/01/2011	CA2533953C Fluid treatment process and apparatus
10/2011
10/27/2011	WO2011131948A1 Method and composition for treating fluids before injection into subterranean zones
10/27/2011	WO2011109616A3 Flow control arrangement and method
10/27/2011	WO2011061239A3 Downhole circulation apparatus
10/27/2011	US20110259639 Downhole Axial Flux Generator
10/27/2011	US20110259581 Formation testing
10/26/2011	EP2255059B1 Hydraulic connector apparatuses and methods of use with downhole tubulars
10/26/2011	CN202017606U Novel oil well pump capable of realizing oil extraction and well cleanout simultaneously
10/26/2011	CN202017469U Device for fixing high-pressure fire hose
10/26/2011	CN102226382A Uninterrupted circulating pup joint for petroleum well drilling and continuous slurry circulation method
10/26/2011	CN102226381A Method for treating abandoned drilling fluid of oilfield
10/26/2011	CN101761485B Righting type downhole annular suction turbopump
10/25/2011	US8043998 Method for treating a fractured formation with a non-ionic fluorinated polymeric surfactant
10/20/2011	WO2011130230A1 Transport and analysis device for use in a borehole
10/20/2011	US20110253447 Multiple distributed force measurements
10/20/2011	DE102010015466A1 Earth drilling fixture has drive device and drill pipes, which has connected linkage shots and is formed as hollow for transport of drilling liquid
10/20/2011	CA2794033A1 Methods for treating fibers
10/19/2011	EP2378056A2 Drilling fluid pressure control system for a floating rig
10/19/2011	EP2376739A2 Subsea solids processing apparatuses and methods
10/19/2011	EP2188486B1 Switchable circulating tool
10/19/2011	CN202012315U Dirty oil and sewage recovery device
10/19/2011	CN202012314U Slurry mixing apparatus
10/19/2011	CN202012313U Drilling fluid stirrer
10/19/2011	CN202012312U Desander
10/19/2011	CN202012311U 泥浆过滤器装置 Mud filter means
10/19/2011	CN202012310U Sand discharge board device of vibrating screen
10/19/2011	CN101571114B Reciprocating drilling pump used for conveying drilling fluid with gas
10/18/2011	CA2620649C Automatic downlink system
10/13/2011	WO2011126669A1 Subterranean well valve activated with differential pressure
10/12/2011	EP2374989A1 Mechanical bi-directional isolation valve
10/12/2011	CN202007638U Special treatment device for waste drilling fluid rubber crushing and mixing
10/12/2011	CN1922383B System, tank and output unit for transporting untreated drill cuttings
10/12/2011	CN102216565A An injection, sealing valving and passageway system
10/12/2011	CN102216556A Boat installation frame for transportation tanks
10/11/2011	US8033338 Wellbore continuous circulation systems and method
10/11/2011	CA2539266C Managed pressure drilling
10/11/2011	CA2465011C Underbalanced well completion
10/06/2011	WO2011123617A2 Improved mud saver valve and method of operation of same
10/06/2011	WO2011123438A1 Method for maintaining wellbore pressure
10/06/2011	WO2011121314A1 Reconditioning and reuse of wellbore servicing fluids
10/06/2011	WO2011092213A3 Online measuring assembly of the rheological properties of a drilling fluid and associated measuring method
10/06/2011	US20110240371 Drilling Station
10/06/2011	US20110240300 mud saver valve and method of operation of same
10/06/2011	CA2794755A1 Method for maintaining wellbore pressure
10/06/2011	CA2793937A1 Reconditioning and reuse of wellbore servicing fluids
10/05/2011	EP2371924A1 Methods for increase gas production and load recovery
10/05/2011	EP2370662A1 Mechanical bi-directional isolation valve
10/05/2011	EP2370660A1 Method and apparatus for down-the-hole drilling
10/05/2011	EP1766181B1 System for conveying drill cuttings
10/05/2011	CN202000958U Compression washable well packer
10/05/2011	CN202000934U Anti-surge laser liquid level monitor
10/05/2011	CN202000933U Constant pressure metering well cleaning device for water injection well in oil field
10/05/2011	CN202000932U Programmable logic controller (PLC)-based dust collector control system
10/05/2011	CN202000931U Flushing water direct supply joint for anchor rod drilling machine
10/05/2011	CN202000892U Multi-functional deep-water undersea pump drilling system
10/05/2011	CN101440694B Casing tool capable of being pressed and circulated
10/05/2011	CN101035961B Sleeve arrangement
10/04/2011	USRE42772 Large particulate removal system
10/04/2011	US8030389 Includes viscosifier system comprised of clay and free radical copolymer having sulfonate moiety; maintains homogeneous when exposed to water and temperature differentials; arctic geothermal well bore drilling
10/04/2011	CA2542964C Instrumented internal blowout preventer valve for measuring drill string drilling parameters
09/2011
09/29/2011	WO2011119728A2 System, assembly and method for port control
09/29/2011	WO2011119448A2 Remotely operated isolation valve
09/29/2011	WO2011119170A1 Control system and interface a tunneling apparatus
09/29/2011	WO2011119157A1 Electrically operated isolation valve
09/29/2011	WO2011117562A1 A tile and a method and an apparatus for making a tile
09/29/2011	WO2011044260A3 Method for hydrocarbon removal and recovery from drill cuttings
09/29/2011	US20110232919 Top drive casing system
09/29/2011	CA2794331A1 Mechanical counter
09/29/2011	CA2794329A1 Downhole actuating apparatus
09/29/2011	CA2794111A1 System, assembly and method for port control
09/28/2011	EP2368009A2 Method for determining formation integrity and optimum drilling parameters during drilling
09/28/2011	EP2368008A2 Methods and apparatuses for mixing drilling fluids
09/28/2011	CN201991478U 一种组合式采油树 A modular Christmas tree
09/28/2011	CN201991471U 熔化焊接阀体 Melting welded body
09/28/2011	CN201991470U 脉冲射流消泡装置 Pulse jet defoaming device
09/28/2011	CN201991469U 车载钻井液固控系统 Car drilling fluid solid control system
09/28/2011	CN1961133B Case of downhole tool with aperture
09/28/2011	CN101316680B Core drilling device and water collecting device for core drilling device
09/27/2011	US8026198 Shale hydration inhibition agent(s) and method of use
09/27/2011	US8025152 Sieve apparatus and method for use of same

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