| 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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| 05/06/2009 | CN201232543Y Sand prevention separator |
| 05/06/2009 | CN201232542Y Counterweight isolator and perforation job pipe column with the counterweight isolator |
| 05/06/2009 | CN201232541Y Composite permeable downhole filter for stainless steel |
| 05/06/2009 | CN201232540Y Oil pumping machine downhole energy storage economizer |
| 05/06/2009 | CN201232539Y Wheel shaft pumping unit |
| 05/06/2009 | CN201232538Y Stroke adjustable vertical pumping unit |
| 05/06/2009 | CN201232537Y Long stroke energy-saving oil pumping machine |
| 05/06/2009 | CN201231479Y Balance block adjustable tool for oil pumping machine |
| 05/06/2009 | CN101427006A Process for extracting liquid hydrocarbon from underground reservoir |
| 05/06/2009 | CN101427005A Process for extracting liquid hydrocarbon from underground reservoir |
| 05/06/2009 | CN101427004A Sulfur barrier for use with in situ processes for treating formations |
| 05/06/2009 | CN101424928A Intelligent control method for beam type pumping unit |
| 05/06/2009 | CN101424181A Method and system for determining and penetrating underground coal gasification passage |
| 05/06/2009 | CN101424180A Well treatment using electric submersible pumping system |
| 05/06/2009 | CN101424179A Ultra-deep ultra-thick oil thermal steam-gas (CO2 and N2) well bore viscosity reduction and oil production technology |
| 05/06/2009 | CN101424178A Crank block type pumping unit |
| 05/06/2009 | CN101424173A Piston type thermal extraction casing head |
| 05/06/2009 | CN101424167A Underground travel increasing apparatus for sucker rod |
| 05/06/2009 | CN100485160C Nitrogen foam adjusting-actuating segment plug injection technique |
| 05/05/2009 | US7528095 Removing cuttings from the bit by circulating a drilling fluid containing a polysaccharide and a polyacrylamide homopolymer (molecular weight 20,000 to less than 40,000 daltons) to maintain stability of the fluid at greater than 250 degrees F; formate is not required |
| 05/05/2009 | US7527108 Portable electrocrushing drill |
| 05/05/2009 | US7527102 Methods and compositions for diverting acid fluids in wellbores |
| 05/05/2009 | US7527100 Method and apparatus for cutting and removal of pipe from wells |
| 05/05/2009 | US7527099 System for sealing a space in a wellbore |
| 05/05/2009 | US7527097 Methods for using reversible phase oil-based drilling fluid |
| 05/05/2009 | US7527096 Methods of improving heavy oil production |
| 05/05/2009 | US7527095 Method of creating a zonal isolation in an underground wellbore |
| 05/05/2009 | US7527094 Double barrier system for an in situ conversion process |
| 05/05/2009 | CA2629278C Stuffing box for progressing cavity pump drive |
| 05/05/2009 | CA2468809C Severe dog leg swivel for tubing conveyed perforating |
| 05/05/2009 | CA2389018C Method and system for suppressing and controlling slug flow in a multi-phase fluid stream |
| 05/05/2009 | CA2313324C Surfactant compositions for wellbore operations, method of forming same and methods of using same |
| 04/30/2009 | WO2009055354A2 Water dissolvable released material used as inflow control device |
| 04/30/2009 | WO2009053669A1 Apparatus and method for ratcheting stimulation tool |
| 04/30/2009 | WO2009053343A2 Method of radially expanding a tubular element in a wellbore provided with a control line |
| 04/30/2009 | WO2009053022A2 Method for forming a subsea connection |
| 04/30/2009 | WO2009032937A3 Method and system for increasing production of a reservoir |
| 04/30/2009 | WO2009032217A3 Enzyme enhanced oil/gas recovery (eeor/eegr) using non-gel hydraulic fracturing in hydrocarbon producing wells |
| 04/30/2009 | WO2009026021A3 Diverting agents for water shut off |
| 04/30/2009 | WO2009006326A3 Gravel-packing carrier fluid with internal breaker |
| 04/30/2009 | WO2009001256A3 Methods of producing flow-through passages in casing, and methods of using such casing |
| 04/30/2009 | WO2008151314A8 Interventionless composite packer |
| 04/30/2009 | WO2008051830A3 Moving hydrocarbons through portions of tar sands formations with a fluid |
| 04/30/2009 | WO2008033120A3 Method and apparatus for perforating and isolating perforations in a wellbore |
| 04/30/2009 | WO2007061816A3 Controlling the pressure within an annular volume of a wellbore |
| 04/30/2009 | US20090111715 Method for remediating flow-restricting hydrate deposits in production systems |
| 04/30/2009 | US20090111714 Disperse non-polyalphaolefin drag reducing polymers |
| 04/30/2009 | US20090107686 Setting tool for expandable liner hanger and associated methods |
| 04/30/2009 | US20090107681 Polymer contains one or more hydrophobic block; surfactant has a hydrophilic-lipophilic balance of less than 12; inorganic salt, preferably NaCl; useful for the recovery of crude oil from a subterranean formation |
| 04/30/2009 | US20090107680 Apparatus and method for ratcheting stimulation tool |
| 04/30/2009 | US20090107678 Chemically Enhanced Stimulation of Oil/Gas Formations |
| 04/30/2009 | US20090107674 Method of Treating Subterranean Formations Using Mixed Density Proppants or Sequential Proppant Stages |
| 04/30/2009 | US20090107673 Nano-Sized Particle-Coated Proppants for Formation Fines Fixation in Proppant Packs |
| 04/30/2009 | US20090107672 Method of Treating a Formation Using Deformable Proppants |
| 04/30/2009 | US20090107671 Stimulation Method |
| 04/30/2009 | CA2780762A1 Setting tool for expandable liner hanger and associated methods |
| 04/30/2009 | CA2701909A1 Apparatus and method for ratcheting stimulation tool |
| 04/29/2009 | EP2053245A1 A surface motor direct-drive sucker-rod screw pump device |
| 04/29/2009 | EP2053196A1 System and method for controlling the pressure in a wellbore |
| 04/29/2009 | EP2052442A2 Connector arrangement with penetrator in a submersible electrical assembly |
| 04/29/2009 | EP2052128A2 Autonomous inflow restrictors for use in a subterranean well |
| 04/29/2009 | CN201228545Y Compensating mechanism for connection of thermal wellhead and ground pipeline |
| 04/29/2009 | CN201228544Y Double heat insulating and subdividing gas injection telescoping device |
| 04/29/2009 | CN201228543Y Single current sand control device |
| 04/29/2009 | CN201228542Y Non-beam cylinder belt type oil pumping machine |
| 04/29/2009 | CN201228541Y Crane type double wells electric-controlled oil pumping machine |
| 04/29/2009 | CN201228540Y Hanging type beam balancing energy-saving oil pump |
| 04/29/2009 | CN201228539Y recovery system for well head oil gas |
| 04/29/2009 | CN201228538Y Non-rod pumping unit |
| 04/29/2009 | CN201228537Y Check valve of water injection well distributor |
| 04/29/2009 | CN201228534Y High-strength sealing and steam injecting packer |
| 04/29/2009 | CN201228533Y Acidizing packer |
| 04/29/2009 | CN201228524Y Integral downhole process pipe column for separate layer testing and water shut off for pumping well |
| 04/29/2009 | CN101421488A Kerogen extraction from subterranean oil shale resources |
| 04/29/2009 | CN101421487A Gravel pack crossover tool with single position multi-function capability |
| 04/29/2009 | CN101421486A Wellbore method and apparatus for sand and inflow control during well operations |
| 04/29/2009 | CN101418681A Once tubular column process for combination oil production by multiple fracturing for oil gas well |
| 04/29/2009 | CN101418680A Gas lift unblocking technology by chemical method |
| 04/29/2009 | CN101418679A Method for pumping coalbed gas by heating coal bed |
| 04/29/2009 | CN100482998C Reinforced tubular threaded joint for improved sealing after plastic expansion |
| 04/29/2009 | CN100482918C Method and device for acid exciting of underwell structure layer |
| 04/28/2009 | US7523785 System for injecting a substance into an annular space |
| 04/28/2009 | US7523783 Internal shock absorber plunger |
| 04/28/2009 | CA2583629C Method and apparatus for pumping wells with a sealing fluid displacement device |
| 04/28/2009 | CA2513736C Extended particle size distribution ceramic fracturing proppant |
| 04/28/2009 | CA2462412C Pressure-actuated perforation with continuous removal of debris |
| 04/28/2009 | CA2459324C Acid gas disposal method |
| 04/28/2009 | CA2445067C Method and apparatus for removing fluids from drill cuttings |
| 04/28/2009 | CA2401791C Wireless power and communications cross-bar switch |
| 04/28/2009 | CA2336439C Stimulating fluid production from unconsolidated formations |
| 04/25/2009 | CA2641332A1 Stimulation method |
| 04/23/2009 | WO2009052149A2 Permeable medium flow control devices for use in hydrocarbon production |
| 04/23/2009 | WO2009052114A2 Water sensing adaptable inflow control device using a powered system |
| 04/23/2009 | WO2009052112A2 Water dissolvable materials for activating in-flow control devices that control flow of subsurface fluids |
| 04/23/2009 | WO2009052103A2 Water sensing devices and methods utilizing same to control flow of subsurface fluids |
| 04/23/2009 | WO2009052096A2 Water sensing adaptable in-flow control device and method of use |
| 04/23/2009 | WO2009052091A2 Water control device using electromagnetics |
| 04/23/2009 | WO2009052076A2 Water absorbing materials used as an in-flow control device |
| 04/23/2009 | WO2009052051A2 Downhole tubular sealing system |
| 04/23/2009 | WO2009052047A1 Three-phase heaters with common overburden sections for heating subsurface formations |