| Patents for E21B 49 - Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells (11,875) |
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| 03/19/2008 | CN101144805A Drilling fluid high-temperature high pressure multifunctional dynamic evaluation tester |
| 03/18/2008 | US7346460 Downhole PV tests for bubble point pressure |
| 03/18/2008 | US7343984 Core sample collector equipped with sterilizing agent-applying mechanism and method of taking core sample |
| 03/18/2008 | US7343983 Method and apparatus for isolating and testing zones during reverse circulation drilling |
| 03/18/2008 | US7343974 Method and apparatus for performing chemical treatments of exposed geological formations |
| 03/18/2008 | CA2752135A1 Method of retreiving a mobilty enhanced formation fluid sample |
| 03/18/2008 | CA2382438C System for enhancing fluid flow in a well |
| 03/13/2008 | US20080060815 Wellhead seal unit |
| 03/13/2008 | US20080060802 System for reducing adhesion and cohesion between non metallic bailers and side wall of wells |
| 03/12/2008 | EP1898046A2 Method for measuring formation properties |
| 03/12/2008 | CN101139927A High-density sampling point storing flow gage measuring inside oil conduit |
| 03/12/2008 | CN100374879C Method for determining sonde error for an induction or propagation tool with transverse or triaxial arrays |
| 03/11/2008 | US7343275 Method for modelling the production of hydrocarbons by a subsurface deposit which are subject to depletion |
| 03/11/2008 | CA2488475C Downhole fluid pumping apparatus and method |
| 03/11/2008 | CA2462307C Methods for determining characteristics of earth formations |
| 03/06/2008 | WO2008000932A3 Optimized method for storing heat energy in an aquifer |
| 03/06/2008 | US20080053702 Assembly and Method for Determining Thermal Properties of a Formation and Forming a Liner |
| 03/06/2008 | US20080053654 Electro-optic cablehead for oilwell applications |
| 03/06/2008 | US20080053212 Flow Control Valve and Method |
| 03/05/2008 | EP1893845A1 Apparatus, method and system for improved reservoir simulation using an algebraic cascading class linear solver |
| 03/05/2008 | CN201031696Y Down-hole exploding type sampler |
| 03/05/2008 | CN201031695Y Anti-theft enclosed sample valve |
| 03/05/2008 | CN201031694Y Unlocking control device of remote electric control lock |
| 03/05/2008 | CN201031693Y Microresistivity scaning borehole wall image-forming logging tool |
| 03/05/2008 | CN101137844A Downhole uses of piezoelectric motors |
| 03/04/2008 | US7340384 Process for determining the variation in the relative permeability of at least one fluid in a reservoir |
| 03/04/2008 | US7339160 Apparatus and method for analysing downhole water chemistry |
| 03/04/2008 | US7337839 Fluid loss additive for enhanced fracture clean-up |
| 03/04/2008 | US7337660 Method and system for reservoir characterization in connection with drilling operations |
| 02/28/2008 | US20080047751 Downhole tool |
| 02/27/2008 | CN201028992Y Collecting stirrer for oil well oil sample |
| 02/27/2008 | CN201027539Y Fast logging platform of multi-drive multi-test arm |
| 02/27/2008 | CN101131089A Push-pull type multi-arm righting hole diameter micrologging instrument |
| 02/26/2008 | CA2376211C Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 02/21/2008 | WO2007142554A9 Device for testing crude oil and gas |
| 02/21/2008 | US20080041593 Wellbore formation evaluation system and method |
| 02/20/2008 | CN201025030Y Dual pasting force rock density-micro ball combination well tester |
| 02/20/2008 | CN201025029Y Under-well electromagnetic shielding box |
| 02/20/2008 | CN201025028Y A strength tester for visual drilling well liquid sealing film |
| 02/20/2008 | CN201025023Y Short connection node for continuous pipe measurement well instrument |
| 02/20/2008 | CN201024974Y Sealer for cable penetrating under well |
| 02/20/2008 | CN201024950Y Cable cutter for under-well measurement and adjustment instrument |
| 02/20/2008 | CN101126754A Geotechnical engineering original position rotation contact-surveying vehicle |
| 02/20/2008 | CN101126710A Drilling fluid gaseous hydrocarbon component quick non-disperse infrared spectrum determination method |
| 02/20/2008 | CN101126315A Whole pass sampling tester |
| 02/19/2008 | US7331223 Method and apparatus for fast pore pressure measurement during drilling operations |
| 02/19/2008 | CA2454313C Method and apparatus for fast pore pressure measurement during drilling operations |
| 02/14/2008 | WO2007082023A3 Zone isolation assembly array for isolating a plurality of fluid zones in a subsurface well |
| 02/14/2008 | CA2597000A1 Methods and apparatus for analyzing fluid properties of emulsions using fluorescence spectroscopy |
| 02/13/2008 | EP1649140B1 Improved downhole pv tests for bubble point pressure |
| 02/13/2008 | CN101122994A Pipe inspection maintenance and fee determination method |
| 02/13/2008 | CN101122231A Mud compensation device of supersonic imaging logger |
| 02/13/2008 | CN101122229A Non-metal composite material insulator and metal bonding method dedicated for petrol logging instrument |
| 02/12/2008 | US7328610 Method for measuring formation properties with a formation tester |
| 02/12/2008 | CA2461933C Determining fluid properties from fluid analyzer |
| 02/11/2008 | CA2653580A1 Device for quantifying the content of at least one gaseous constituent contained in a gaseous sample from a fluid, related assembly and process |
| 02/06/2008 | EP1884620A1 Method of quantifying the formation and retention of hydrocarbons in source rock |
| 02/06/2008 | CN101118215A Non-dispersed infra-red spectrometry method suitable for wide environmental temperature range |
| 02/06/2008 | CN101118201A Rarefaction sludge sampler |
| 02/06/2008 | CN100366863C Downhole sampling apparatus and method |
| 02/05/2008 | US7325628 Anchor for vehicle, vehicle and anchor in combination, and method of using the anchor |
| 02/05/2008 | US7325597 Safety valve apparatus for downhole pressure transmission systems |
| 01/31/2008 | WO2008012806A1 Liquid purge valve |
| 01/31/2008 | CA2657215A1 Liquid purge valve |
| 01/30/2008 | CN201013369Y Cover-rotary type crude oil sampling barrel |
| 01/30/2008 | CN201013368Y Polymer injection well mouth pressure-relieving sampling device |
| 01/30/2008 | CN201013367Y Oil well sampling detecting valve |
| 01/30/2008 | CN201013366Y Down-hole instrument open-and-shut controller |
| 01/30/2008 | CN201013365Y Diameter variable focusing screening core column employed for resistivity logging |
| 01/30/2008 | CN201013364Y Transformer box of petroleum logging device |
| 01/30/2008 | CN201013363Y Double-chamber releaser |
| 01/30/2008 | CN201013356Y Petroleum logging device aluminum alloy framework upper connector |
| 01/30/2008 | CN201013353Y Counter electrode testing case |
| 01/30/2008 | CN201013309Y Down-hole piezo-electric control switch for water finding and blocking of oil layer |
| 01/30/2008 | CN101113674A Drilling stress meter for one-hole multiple measuring points |
| 01/30/2008 | CN101113672A Formation testing tools bidirectional and variable direction delay device |
| 01/30/2008 | CN100365439C Apparatus and methods for determining isotropic and anisotropic formation resistivity in the presence of invasion |
| 01/29/2008 | US7324929 Method and system for simulating a hydrocarbon-bearing formation |
| 01/29/2008 | CA2284639C Subsurface measurement apparatus, system, and process for improved well drilling, control, and production |
| 01/26/2008 | CA2594623A1 Method for analyzing data having shared and distinct properties |
| 01/24/2008 | WO2008011189A1 Packer variable volume excluder and sampling method therefor |
| 01/24/2008 | WO2008010174A2 Dust particle catcher for a drilling apparatus |
| 01/23/2008 | CN101109739A Bearing strength experiment instrument of high-temperature high-pressure mud cake plugging |
| 01/23/2008 | CN101109281A High-temperature high-pressure clay cake interface agglutination simulating-estimating device |
| 01/17/2008 | WO2008006851A1 Method for describing relations in systems on the basis of an algebraic model |
| 01/16/2008 | EP1877646A1 Methods and apparatus of downhole fluid analysis |
| 01/16/2008 | EP1716314B1 Smooth draw-down for formation pressure testing |
| 01/16/2008 | CN201007208Y Well head anti-freeze and anti-theft sampling apparatus |
| 01/16/2008 | CN201007207Y Gas preprocess device and negative pressure valve structure alarm thereof |
| 01/16/2008 | CN201007206Y Standing layered on-site sampling apparatus |
| 01/15/2008 | US7318343 System for detecting gas in a wellbore during drilling |
| 01/15/2008 | CA2541408C Method and system for logging while casing |
| 01/15/2008 | CA2484688C Downhole sampling apparatus and method for using same |
| 01/15/2008 | CA2447317C Method and apparatus for downhole fluid characterization using flexural mechanical resonators |
| 01/15/2008 | CA2364271C Hydraulic strain sensor |
| 01/15/2008 | CA2187432C Production wells having permanent downhole formation evaluation sensors |
| 01/10/2008 | WO2007078214A3 Cable downhole gas chromatograph and a downhole gas chromatography method |
| 01/09/2008 | EP1875043A1 Method and sample removal device for obtaining a water and/or oil and/or gas and or solids-containing sample medium from a borehole |
| 01/09/2008 | EP1875036A1 Device for extracting at least one type of gas contained in a drilling mud, an analysis arrangement and a related extraction method |
| 01/08/2008 | US7317989 Method and apparatus for chemometric estimations of fluid density, viscosity, dielectric constant, and resistivity from mechanical resonator data |