Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7337068 | Global classification of sonic logs A method of determining the sonic slowness of a formation traversed by a borehole comprising generating tracks from sonic waveform peaks received at a plurality of depths wherein the peaks that are not classified prior to tracking is set forth. A method for generati... | 02/26/2008 |
| 7336562 | Sonic logging tool including receiver and spacer structure A formation logging tool having a substantially continuous central mandrel with regularly spaced mass blocks disposed thereon, at least some of the mass blocks carrying sensors such as receivers. By adopting this structure, the tool can be made to behave as a mass-s... | 02/26/2008 |
| 7336356 | Method and apparatus for downhole spectral analysis of fluids A downhole fluid analysis system comprises an input light signal that is directed through a fluid sample housed in a sample cell. The input light signal may originate from a plurality of light sources. A light signal output from the sample cell is then routed to two... | 02/26/2008 |
| 7334661 | Acoustic logging tool sleeve An acoustic logging tool sleeve with a preferably discontinuous, alternating structure that is acoustically opaque in some zones, and acoustically transparent in others. The sleeve may be modular, with several stages connected together. The multiple stages provide a... | 02/26/2008 |
| 7334483 | Thermal compensation of pressure measurements Methods and systems for thermal compensation of pressure measurements by a pressure gauge. Errors in pressure values are reduced by utilizing a predetermined correlation between the error in pressure measurements, due to temperature gradient in a pressure gauge, and... | 02/26/2008 |
| 7331386 | Anchor arm for seismic logging tool A borehole seismic acquisition tool configured for release from a stuck position within a borehole having a tool body with at least one sensor package, an anchoring arm, and anchoring arm linkage adapted to connect the anchoring arm to the tool body. The anchoring a... | 02/19/2008 |
| 7321123 | Method and apparatus for radiation detection in a high temperature environment A radiation detector operating at high temperatures is shown comprising a LuAP scintillating material for producing light when excited by incident radiation, a photocathode, and an electron multiplier. The photocathode is deposited directly onto the surface of the s... | 01/22/2008 |
| 7317990 | Distributed processing system for subsurface operations A method for distributed processing in a subsurface environment includes running a local program on a local computation unit, wherein the local program is configured to call a remote procedure to be executed by a remote computation unit, wherein the local computatio... | 01/08/2008 |
| 7305306 | System and methods of deriving fluid properties of downhole fluids and uncertainty thereof Methods and systems are provided for downhole analysis of formation fluids by deriving fluid properties and associated uncertainty in the predicted fluid properties based on downhole data, and generating answer products of interest based on differences in the fluid ... | 12/04/2007 |
| 7281578 | Apparatus and methods for positioning in a borehole A borehole tool positioning and measuring apparatus and its methods of use are provided. The apparatus and method can be used to centralize a logging tool in a wellbore, or position a logging tool at a desired relative alignment relative to the wellbore perimeter su... | 10/16/2007 |
| 7251566 | Pump off measurements for quality control and wellbore stability prediction A method for obtaining high-quality well logging data acquired during a drilling operation includes acquiring well logging data during a pump-off period when a mud pump is turned off; and extracting a subset of data from the acquired well logging data, wherein the s... | 07/31/2007 |
| 7225662 | Geophone calibration technique Various techniques are described which may be used to facilitate and improve seismic exploration activities. For example, one aspect of the present invention is directed to a technique for enabling in-situ measurement of geophone response parameters. Another aspect ... | 06/05/2007 |
| 7216737 | Acoustic isolator between downhole transmitters and receivers Apparatus and methods for acoustically isolating logging tool receiver and transmitter sections. One or more modular isolators is arranged between the receiver and transmitter sections. The modular isolators comprise a high tensile strength while also providing for ... | 05/15/2007 |
| 7207397 | Multi-pole transmitter source Methods and apparatus facilitating logging-while-drilling (LWD) using a multi-pole acoustic transmitter source. The multi-pole transmitter source enables measurement of formation velocities, including shear wave velocities through formations that are slower than vel... | 04/24/2007 |
| 7193525 | Methods and apparatus for downhole inter-tool communication A method and apparatus for communicating between downhole tools without the necessity of routing the communication through a surface module. Communications sent by downhole tools are examined and extracted downhole. If the communications are intended for other downh... | 03/20/2007 |
| 7187620 | Method and apparatus for borehole sensing The present invention provides an apparatus and method for sensing subsurface data. One embodiment of the invention comprises a shuttle attached to a conveyance where the conveyance and shuttle are adapted to be spooled downhole into a borehole for sensing seismic d... | 03/06/2007 |
| 7171851 | Temperature compensated strain measurement The present invention provides methods and apparatus for measuring subterranean strain. The methods and apparatus use fluid expansion principles to compensate for temperature variations and increase the accuracy of the strain measurements. The methods and apparatus ... | 02/06/2007 |
| 7107153 | Data compression methods and systems The present invention is directed to methods and systems for taking measurements relating to subterranean formations. The methods and systems effectively compress data and thus facilitate more efficient data transmission. The methods and systems are capable of autom... | 09/12/2006 |
| 7099235 | Geophone and method of manufacturing a geophone A vibration transducer such as a geophone, comprising a central pole piece (110) with a magnet (112) and coil (118) concentrically arranged around it. The position of the magnet (112) is fixed relative to the pole piece (110) and t... | 08/29/2006 |
| 7085194 | Methods and systems for calibrating acoustic receivers A method and system for calibrating acoustic receivers (112). The method and system facilitate calibrating the acoustic receivers (112) while they are mounted to a downhole acoustic tool (102). Calibrating the acoustic receivers (112) in ... | 08/01/2006 |
| 6981550 | Sonde A sonde and an apparatus for the deployment thereof against a well casing is described, the sonde comprising a resilient C-shaped member (22) and at least one sensor (23). ... | 01/03/2006 |
| 6965849 | Method of designing geophysical surveys A method for the design of VSP surveys for the purpose of imaging a reef in the formations surrounding the well in question. The basic steps include: building a geophysical model; defining receiver locations in the... | 11/15/2005 |
