| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
|---|
| 04/21/1992 | US5105894 Method and apparatus for orientating core sample and plug removed from sidewall of a borehole relative to a well and formations penetrated by the borehole |
| 04/21/1992 | US5105883 Casing restriction sub |
| 04/21/1992 | US5105881 Formation squeeze monitor apparatus |
| 04/20/1992 | WO1992007162A1 Motorized swivel provided with a dynamometric measurement unit |
| 04/19/1992 | CA2044934A1 Method for cement evaluation using acoustical logs |
| 04/16/1992 | WO1992006278A1 Transmission of data in boreholes |
| 04/16/1992 | WO1992006277A1 Mirror for producing development image of wall of hole in ground and device for producing image |
| 04/16/1992 | DE4032118A1 Well cleaning device sealed against well shaft wall - has inflatable cuffs or hoses and controls pressure of supplied medium w.r.t. pressure within enclosed chamber |
| 04/15/1992 | EP0480808A2 Depth measuring device with wear resistant guide means |
| 04/14/1992 | US5105085 Fluid analysis system |
| 04/14/1992 | US5103920 Surveying system and method for locating target subterranean bodies |
| 04/14/1992 | US5103919 Method of determining the rotational orientation of a downhole tool |
| 04/14/1992 | CA1298872C Electric logging method |
| 04/14/1992 | CA1298779C Bottom hole shut-in tool |
| 04/10/1992 | CA2053117A1 Technique for reducing whirling of a drill string |
| 04/08/1992 | EP0478798A1 System for controlling direction of underground excavator |
| 04/07/1992 | US5103430 Mud pulse pressure signal generator |
| 04/07/1992 | US5103177 Method and apparatus for determining the azimuth of a borehole by deriving the magnitude of the terrestial magnetic field bze |
| 04/07/1992 | CA1298543C Thermal drainage process for recovering hot water-swollen oil from a thick tar sand |
| 04/07/1992 | CA1298486C Homogenising and metering the flow of a multiphase mixture of fluids |
| 04/02/1992 | WO1992005533A1 Identifying metal articles |
| 03/31/1992 | US5101104 Carrier apparatus for radioactive well logging instrument |
| 03/31/1992 | US5099927 Apparatus for guiding and steering earth boring casing |
| 03/31/1992 | US5099920 Small diameter dual pump pollutant recovery system |
| 03/31/1992 | US5099919 Plug for well logging operations |
| 03/31/1992 | US5099918 Power sources for downhole electrical heating |
| 03/31/1992 | US5099700 Extensometric sensor for measuring the stresses acting on a drilling element and a device for mounting such a sensor |
| 03/24/1992 | US5099115 Tubular members inspection apparatus having an inspection window and means for correllating reflected light to window damage |
| 03/24/1992 | CA1297782C Gravel packing system for a production radial tube |
| 03/19/1992 | WO1992002707A3 A core sampling device with indicator for jammed core |
| 03/18/1992 | EP0475791A2 Apparatus and method for detecting the presence of gas in a borehole flow stream |
| 03/17/1992 | US5096001 MWD tool for deep, small diameter boreholes |
| 03/17/1992 | US5095983 Multiphase production evaluation method using thru-tubing, wireline packoff devices |
| 03/17/1992 | US5095982 Method of characterizing the flowpath for fluid injected into a subterranean formation |
| 03/17/1992 | US5095981 Casing centralizer |
| 03/17/1992 | US5095978 Hydraulically operated permanent type well packer assembly |
| 03/17/1992 | US5095977 Coupon holder for corrosion test downhole in a borehole |
| 03/17/1992 | US5095758 Water cut monitoring means and method |
| 03/17/1992 | CA1297587C Method for determining pore pressure and horizontal effective stress from overburden and effective vertical stress |
| 03/11/1992 | EP0474459A2 Inclinometer |
| 03/11/1992 | EP0474350A1 Control of subterranean fracture orientation |
| 03/11/1992 | CN1015834B Accurate position seismic wave transmission device |
| 03/11/1992 | CA2051008A1 Method and apparatus for measuring horizontal fluid flow in downhole formations using injected radioactive tracer monitoring |
| 03/10/1992 | US5095272 Methods for determining formation dip and strike using high frequency phase shift |
| 03/10/1992 | US5094808 Oxygen activation downhole tool |
| 03/10/1992 | US5094103 Steam quality and flow rate measurement |
| 03/10/1992 | US5094102 Liquid level detection |
| 03/10/1992 | CA1297163C System and method for communicating signals in a cased borehole having tubing |
| 03/08/1992 | CA2050768A1 Inclinometer |
| 03/05/1992 | WO1992004527A1 Method for determining the rotational speed of a drill bit |
| 03/05/1992 | DE4129247A1 Short circuit arc welding system - includes second parallel welding current circuit to help control the arc spread and plasma during the arcing phase |
| 03/05/1992 | DE4128287A1 Sinking borehole with drill string contg. motor for rotary bit - includes equipment for data measurement and transmitting data to surface |
| 03/04/1992 | CN2097902U High-temp. high-efficient sound emission energy transducer |
| 03/04/1992 | CN1015730B Method of computing formation dip and azimuth |
| 03/03/1992 | US5092402 Tubing end locator |
| 03/03/1992 | US5092167 Method for determining liquid recovery during a closed-chamber drill stem test |
| 03/03/1992 | US5092159 Method and apparatus utilizing a single nozzle for effecting measurment of steam characteristics |
| 03/03/1992 | US5092056 Reversed leaf spring energizing system for wellbore caliper arms |
| 03/03/1992 | CA1296707C Method of controlling fluid influxes in hydrocarbon wells |
| 03/03/1992 | CA1296618C Methods for monitoring temperature-vs-depth characteristics in a borehole |
| 03/01/1992 | WO1992004644A1 Method for acoustically transmitting well drilling data |
| 03/01/1992 | CA2072128A1 Method for acoustically transmitting well drilling data |
| 03/01/1992 | CA2048768A1 Borehole televiewer system depth monitoring and recording system |
| 03/01/1992 | CA2024429A1 Borehole deviation monitor |
| 02/26/1992 | EP0471858A1 System for detecting the position of an underground excavator |
| 02/26/1992 | EP0294440B1 Probe and its multidirectional anchoring device in a well |
| 02/26/1992 | CN1059013A Well-head projectile connector used in oil well logging |
| 02/25/1992 | US5091725 Well logging tool and system having a switched mode power amplifier |
| 02/25/1992 | US5091644 Method for analyzing formation data from a formation evaluation MWD logging tool |
| 02/25/1992 | CA1296250C Method and apparatus for dispensing oil well proppant additive |
| 02/20/1992 | WO1992002833A1 A method for deconvolution of non-ideal frequency response of pipe structures to acoustic signals |
| 02/20/1992 | WO1992002707A2 A core sampling device with indicator for jammed core |
| 02/19/1992 | EP0471659A1 Laser alignment system for well equipment |
| 02/18/1992 | US5089989 Method and apparatus for measuring the quality of a cement to a casing bond |
| 02/18/1992 | US5088387 Fluidized bed fluid pressure regulator |
| 02/18/1992 | CA1295952C Steam profile liquid/vapour separator |
| 02/15/1992 | CA2047570A1 Connecting apparatus for logging tools including electrical feedthrough and isolation system with bridle assembly |
| 02/14/1992 | CA2048967A1 Laser alignment system for well equipment |
| 02/11/1992 | US5086645 Multiple caliper arms capable of independent movement |
| 02/11/1992 | CA1295678C Method and apparatus for remote signal entry into measurement while drilling system |
| 02/06/1992 | WO1992002054A1 Piezoelectric transducer for high speed data transmission and method of operation |
| 02/06/1992 | WO1992001955A1 Torsional force transducer and method of operation |
| 02/05/1992 | EP0349610B1 Device for drilling essentially vertical boreholes |
| 02/04/1992 | US5084980 Laser alignment system for well equipment |
| 02/04/1992 | CA1295125C Method and apparatus for measurement of azimuth of a borehole while drilling |
| 01/29/1992 | EP0468891A1 Dynamometric measuring assembly for drill pipe with radio transmission means |
| 01/28/1992 | US5083452 Method for recording multi-phase flows through a transport system |
| 01/28/1992 | CA1295017C Non-contact borehole caliber measurement |
| 01/26/1992 | CA2047587A1 Detecting outflow or inflow of fluid in a wellbore |
| 01/23/1992 | WO1992001140A1 System for supporting drive of excavating type underground digging machine |
| 01/22/1992 | EP0467573A2 Subsurface pressure actuated well apparatus |
| 01/22/1992 | EP0467335A2 Attitude control device and drilling-direction control device |
| 01/22/1992 | EP0466859A1 Pipework for constructing a ground water measuring point. |
| 01/22/1992 | CN2093897U Multi-functional cable cleaner |
| 01/21/1992 | US5083124 Nuclear logging tool electronics including programmable gain amplifier and peak detection circuits |
| 01/21/1992 | CA1294538C Method of logging an inclined wellbore |
| 01/15/1992 | EP0466229A1 Method of and apparatus for detecting an influx into a well while drilling |
| 01/15/1992 | EP0465731A1 Method and apparatus for determining the torque applied to a drillstring at the surface |
| 01/15/1992 | EP0465543A1 Method and apparatus for monitoring well fluid parameters. |
| 01/15/1992 | CN2093238U Shallow, medium and deep investigation lateral viewing resistivity logging apparatus |