| Patents for E21B 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (64,186) |
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| 07/25/2007 | CN2926581Y Bidirectionally balanced walking beam style double donkey oil sucker with normal cranks for double wells |
| 07/25/2007 | CN2926580Y Multi-stage sandproof oil pump |
| 07/25/2007 | CN2926579Y Long-stroke intelligent adhesive-tape oil-pumping unit |
| 07/25/2007 | CN2926578Y Gap oil pump |
| 07/25/2007 | CN2926500Y Low-shearing controller |
| 07/25/2007 | CN2926499Y Accounting automatically-replaceable nozzle water distributor |
| 07/25/2007 | CN2926498Y Partial-pressure water filler of injection focusing system |
| 07/25/2007 | CN2926497Y Coupling injector of gas driving well |
| 07/25/2007 | CN2926496Y Ground sand filter of oil water well |
| 07/25/2007 | CN2926495Y Sandproofing pipe with cleaning and wax-removing functions for oil well |
| 07/25/2007 | CN2926494Y Sand-proofing sieve tube of laminated stainless steel metal mesh cloth |
| 07/25/2007 | CN2926493Y Single-crank and low-stroke economical pumping unit without beam |
| 07/25/2007 | CN2926492Y Monitor of pumping well against pump-out |
| 07/25/2007 | CN2926491Y Double-well large-wheeled oil-well pump |
| 07/25/2007 | CN1328474C Expander for expanding tubular element |
| 07/25/2007 | CN101004171A Straight oil pumping unit of direct current of hidden oil |
| 07/25/2007 | CN101004133A Sound wave shock and pulse combustion type pressing crack apparatus |
| 07/25/2007 | CN101004132A Exploitation technique for disgorging thick oil by pouring air to assistant steam |
| 07/25/2007 | CN101004131A Pumping unit with long stroke |
| 07/24/2007 | US7248969 Waterflood control system for maximizing total oil recovery |
| 07/24/2007 | US7248178 RF communication with downhole equipment |
| 07/24/2007 | US7246667 Radial expansion of tubular members |
| 07/24/2007 | US7246662 Systems and methods for controlling flow control devices |
| 07/24/2007 | US7246660 Borehole discontinuities for enhanced power generation |
| 07/24/2007 | US7246659 Damping fluid pressure waves in a subterranean well |
| 07/24/2007 | US7246548 Well perforating gun |
| 07/24/2007 | CA2483023C Method and system for accessing subterranean deposits from the surface |
| 07/24/2007 | CA2420470C Apparatus and method for lining a downhole casing |
| 07/24/2007 | CA2367583C Downhole separator for use in a subterranean well and method |
| 07/24/2007 | CA2288784C Monitoring of downhole parameters and tools utilizing fiber optics |
| 07/24/2007 | CA2271531C Methods of stimulating and producing multiple stratified reservoirs |
| 07/19/2007 | WO2007082225A2 Apparatus and method for selective actuation of downhole tools |
| 07/19/2007 | WO2007082109A2 Interference-seal plunger for an artificial lift system |
| 07/19/2007 | WO2007082023A2 Zone isolation assembly array for isolating a plurality of fluid zones in a subsurface well |
| 07/19/2007 | WO2007082006A2 Apparatus for treating fluid streams |
| 07/19/2007 | WO2007081577A2 Method to detect low salinity injection water encroachment into oil formations |
| 07/19/2007 | WO2007081240A1 Method and device for treating bottom-hole zones of oil-and-gas-bearing formations |
| 07/19/2007 | WO2007053190A3 Low debris perforating gun system for oriented perforating |
| 07/19/2007 | US20070167333 Spray dried emulsifier compositions, methods for their preparation, and their use in oil-based drilling fluid compositions |
| 07/19/2007 | US20070167332 Quaternary ammonium salts as thickening agents for aqueous systems |
| 07/19/2007 | US20070167331 Method of consolidating an underground formation |
| 07/19/2007 | US20070163786 Expansion pig |
| 07/19/2007 | US20070163785 Expandable tubular |
| 07/19/2007 | US20070163781 Multi-zone, single trip well completion system and methods of use |
| 07/19/2007 | US20070163780 Method and system for monitoring the incursion of particulate material into a well casing within hydrocarbon bearing formations including gas hydrates |
| 07/19/2007 | US20070163779 Compositions containing a buffer and a peroxide or peracid useful for treating wells |
| 07/19/2007 | DE19781780B4 Unterwasser-Verbindung Underwater Connection |
| 07/19/2007 | CA2637186A1 Interference-seal plunger for an artificial lift system |
| 07/19/2007 | CA2636766A1 Method and device for treating bottom-hole zones of oil-and-gas-bearing formations |
| 07/18/2007 | EP1808570A1 System for drilling the ground to obtain circulation of fluid in a plant for exploitation of geothermal energy |
| 07/18/2007 | EP1807605A2 Methods for producing fluids from acidized and consolidated portions of subterranean formations |
| 07/18/2007 | EP1807604A2 Production of free gas by gas hydrate conversion |
| 07/18/2007 | EP1537291B1 Drilling method |
| 07/18/2007 | EP1527234B1 Method and device for soil analysis |
| 07/18/2007 | EP1448923B1 Subsea connection apparatus |
| 07/18/2007 | CN2924006Y Integrated formation-testing pipe string of cross-packer back-perforating, detecting and discharging liquid |
| 07/18/2007 | CN2924005Y Perforating, detecting, acidating and liquid-discharging integrated testing pipe string |
| 07/18/2007 | CN2923998Y Separated layer polymer-injection distributor |
| 07/18/2007 | CN2923997Y Cocentric tube gas-lifting operation tube |
| 07/18/2007 | CN2923996Y Inlaid filtering assembly capable of changing filtering net |
| 07/18/2007 | CN2923995Y Labyrinth-type limited casing tube of resetting by touch and go |
| 07/18/2007 | CN2923994Y Multifunction oil-increasing device |
| 07/18/2007 | CN2923993Y Steam-filling-well underground steam non-return device |
| 07/18/2007 | CN2923981Y Portable polish-rod clamp operation protector |
| 07/18/2007 | CN1327108C Downhole separator and method |
| 07/18/2007 | CN1327107C Breaking method and device for underground well structure layer |
| 07/18/2007 | CN1327106C Chemical regulator for stratified waterflooding in water injection well and stratified water amount regulating construction method |
| 07/18/2007 | CN1327105C Zonal water injection contanst flow packer |
| 07/18/2007 | CN100999992A Method for transferring steam driven at thickened oil steam taking-in and sending-out later period post |
| 07/18/2007 | CN100999991A Pressure pluse water injucting apparatus for oil well |
| 07/18/2007 | CN100999990A Low permeating oil layer vertical crack directional perforating crushing method |
| 07/18/2007 | CN100999989A High pressure water jet-flow deep penetrating perforating and its auxiliary crushing method and apparatus |
| 07/18/2007 | CN100999988A Composite cylinder type pulsing decelerating energy-saving oil pumping machine |
| 07/18/2007 | CN100999985A Sucker rod rope suspension apparatus |
| 07/18/2007 | CA2533625A1 Method of operation of nuclear reactor |
| 07/17/2007 | US7243742 Drill pipe screen |
| 07/17/2007 | US7243741 Separation of evolved gases from drilling fluids in a drilling operation |
| 07/17/2007 | US7243738 Multi seam coal bed/methane dewatering and depressurizing production system |
| 07/17/2007 | US7243732 Zonal isolation using elastic memory foam |
| 07/17/2007 | US7243731 Apparatus for radially expanding tubular members including a segmented expansion cone |
| 07/17/2007 | US7243730 Well production optimizing system |
| 07/17/2007 | US7243727 Isolation assembly for coiled tubing |
| 07/17/2007 | US7243726 Enhancing a flow through a well pump |
| 07/17/2007 | US7243725 Surge chamber assembly and method for perforating in dynamic underbalanced conditions |
| 07/17/2007 | US7243724 Apparatus and method for treating an interval of a wellbore |
| 07/17/2007 | US7243723 System and method for fracturing and gravel packing a borehole |
| 07/17/2007 | US7243722 Expander device |
| 07/17/2007 | US7243721 Methods and apparatus for heating oil production reservoirs |
| 07/17/2007 | US7243720 Inhibiting breakthrough of driving fluid via a permeable geological layer into an oil production well |
| 07/17/2007 | US7243717 Apparatus in a drill string |
| 07/17/2007 | US7243716 Heated windable rigid duct for transporting fluids, particularly hydrocarbons |
| 07/17/2007 | US7243715 Mesh screen apparatus and method of manufacture |
| 07/17/2007 | US7243714 Well provided with flexible production tubing |
| 07/17/2007 | CA2536716C Expanded threaded connection with seal at interface |
| 07/17/2007 | CA2526227C Expandable connector for borehole tubes |
| 07/17/2007 | CA2358071C Method for removing condensables from a natural gas stream, at a wellhead, downstream of the wellhead choke |
| 07/17/2007 | CA2300555C Under-balanced drilling separation apparatus and methods |
| 07/17/2007 | CA2257611C System for sealing the intersection between a primary and a branch borehole |
| 07/17/2007 | CA2221789C Connector assembly for an expandable slotted pipe |
| 07/13/2007 | CA2570250A1 Flow control system for use in a well |