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| Number | Title | Issue Date |
| 7409774 | Borehole tool A borehole tool, comprises: a tool body; a series of arms connected to the tool body and moveable radially relative thereto; and a series of pads mounted on the arms so as to be pivotable about a radial axis relative to the tool body. By allowing pivoting of the pad... | 08/12/2008 |
| 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 |
| 7301345 | While-drilling methodology for estimating formation pressure based upon streaming potential measurements Logging-while-drilling apparatus and methodologies for measuring streaming potential in an earth formation are provided. The apparatus and methodologies can be utilized to find information relevant to the drilling operations. In particular, since the streaming poten... | 11/27/2007 |
| 7254486 | Method and apparatus for shale bed detection in deviated and horizontal wellbores A relative dip angle of a deviated borehole is determined from natural gamma ray measurements. Dip corrected measurements are processed to determine the thickness of thin beds, and the peak gamma ray response in thin beds. ... | 08/07/2007 |
| 7243718 | Methods for locating formation fractures and monitoring well completion using streaming potential transients information Earth formations are characterized by using an array of electrodes which can measure streaming potentials in the formation, and by interpreting the data obtained by the electrodes. The electrodes are placed on a wireline tool, a LWD tool, or in a fixed manner about ... | 07/17/2007 |
| 7233150 | While-drilling apparatus for measuring streaming potentials and determining earth formation characteristics Earth formations are characterized by using an array of electrodes which can measure streaming potentials in the formation, and by interpreting the data obtained by the electrodes. The electrodes are placed on a wireline tool, a LWD tool, or in a fixed manner about ... | 06/19/2007 |
| 7219541 | Method and apparatus for downhole fluid analysis for reservoir fluid characterization A formation fluid sample is exposed to a rigidly-supported semi-permeable membrane such as silicone rubber to permit diffusion of gases and vapors from the formation fluid into a vacuum chamber, while at the same time, blocking the passage of any liquids. The membra... | 05/22/2007 |
| 7216533 | Methods for using a formation tester A method of testing a downhole formation using a formation tester on a drill string. The formation tester is disposed downhole on a drill string and a formation test is performed by forming a seal between a formation probe assembly and the formation. A drawdown pist... | 05/15/2007 |
| 7204309 | MWD formation tester A formation testing tool is described herein, including a formation probe assembly having an extendable sampling probe surrounded by a cylindrical sleeve. The sleeve is configured to engage a metal skirt having an elastomeric seal pad coupled thereto. The skirt and ... | 04/17/2007 |
| 7198105 | Apparatus and method for controlling the pressure of fluid within a sample chamber A formation testing tool and method for providing pressure controlled sampling is provided. A flow line delivers formation fluid to a sample chamber in the testing tool. A first valve controls the flow of formation fluid from the flow line to the sample chamber. A p... | 04/03/2007 |
| 7195063 | Downhole sampling apparatus and method for using same A method and apparatus for sampling formation fluid includes drawing formation fluid from the subterranean formation into the downhole tool and collecting the formation fluid in a sample chamber. An exit flow line is operatively connected to the sample chamber for s... | 03/27/2007 |
| 7178591 | Apparatus and method for formation evaluation Techniques for reduced contamination formation evaluation are provided. The techniques relate to drawing fluid into a downhole tool positionable in a wellbore penetrating a subterranean formation having a virgin fluid and a contaminated fluid therein. Fluid is drawn... | 02/20/2007 |
| 7168287 | Reference leakage device for leak sniffer detector A reference leakage device for a leak sniffer detector that is equipped with a sniffing tip and a control unit. The reference leakage device includes a gas reservoir and a constriction wherefrom there is released a specific amount of test gas, at least during calibr... | 01/30/2007 |
| 7152466 | Methods and apparatus for rapidly measuring pressure in earth formations Methods and apparatus for rapidly measuring pressure in earth formations are disclosed. According to a first embodiment of the apparatus, a probe is provided with a movable piston having a sensor built into the piston. According to a second embodiment of the apparat... | 12/26/2006 |
| 7150188 | Non-invasive measurement of fluid-pressure diffusivity using electro-osmosis An apparatus for determining fluid-pressure diffusivity in a borehole (12) in a formation (10) includes an electrode (16) and a strain measuring device (18),(20) (or a particle velocity measuring device (18),(20) or a... | 12/19/2006 |
| 7140436 | Apparatus and method for controlling the pressure of fluid within a sample chamber A formation testing tool and method for providing pressure controlled sampling is provided. A flow line delivers formation fluid to a sample chamber in the testing tool. A first valve controls the flow of formation fluid from the flow line to the sample chamber. A p... | 11/28/2006 |
| 7090012 | Method and apparatus for subsurface fluid sampling The apparatuses and methods herein relate to techniques for extracting fluid from a subsurface formation. A downhole sampling tool is provided with a probe having an internal wall capable of selectively diverting virgin fluids into virgin flow channels for sampling,... | 08/15/2006 |
| 7069775 | Borehole caliper tool using ultrasonic transducer A borehole caliper tool includes a tool body, a bow spring flexibly coupled to the tool body, a target coupled to the bow spring, and an ultrasonic transducer coupled to the tool body, wherein in operation the ultrasonic transducer transmits an acoustic pulse to the... | 07/04/2006 |
| 7066019 | Cavity stability prediction method for wellbores A method of predicting the failure of a rock formation surrounding a subterranean cavity, including a measuring set of parameters relating to pressure conditions and stresses in the rock formation surrounding the cavity; using the set of parameters to determine a ro... | 06/27/2006 |
| 7059179 | Multi-probe pressure transient analysis for determination of horizontal permeability, anisotropy and skin in an earth formation The specification discloses a downhole tool that determines hydraulic permeability of a downhole formation taking into account one or both of the dip angle of the borehole relative to the formation, and damage to the borehole wall and invasion of borehole fluid—co... | 06/13/2006 |
| 7042802 | Determination of stress characteristics of earth formations A method for determining the maximum and minimum horizontal stresses of formations surrounding a borehole includes the following steps: suspending a logging device in the borehole; transmitting sonic energy from the logging device to establish flexural waves in the ... | 05/09/2006 |
| 7036579 | Method for measuring formation properties with a time-limited formation test An apparatus and method for determining at least one downhole formation property is disclosed. The apparatus includes a probe and a pretest piston positionable in fluid communication with the formation, and a series of flowlines pressure gauges, and valves configure... | 05/02/2006 |
| 7007396 | Replacement heart valve sizing device A heart valve sizing system featuring a lumen advanceable in vasculature, an inside caliper device at the distal end of the lumen, and a readout for reading the dimension gauged by the inside caliper device. In the preferred embodiment, the inside caliper device inc... | 03/07/2006 |
| 7000697 | Downhole measurement apparatus and technique A system that is usable with a subterranean well that has a casing includes an apparatus that is associated with production of fluid from the well and is located downhole in the well in a passageway of the casing. The system also includes a sensor that is located do... | 02/21/2006 |
| 6993433 | Modeling gravity and tensor gravity data using poisson's equation for airborne, surface and borehole applications The present invention is a method for determining a parameter of interest of a region of interest of the earth. At least one component of potential fields data is measured at a plurality of locations over a region of interest including a subterranean formation of in... | 01/31/2006 |
| 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 |
| 6978672 | Wireline apparatus for measuring steaming potentials and determining earth formation characteristics Earth formations are characterized by using an array of electrodes which can measure streaming potentials in the formation, and by interpreting the data obtained by the electrodes. The electrodes are placed on a wireline tool, a LWD tool, or in a fixed manner about ... | 12/27/2005 |
| 6964301 | Method and apparatus for subsurface fluid sampling The apparatuses and methods herein relate to techniques for extracting fluid from a subsurface formation. A downhole sampling tool is provided with a probe having an internal wall capable of selectively diverting virgin fluids into virgin flow channels for sampling,... | 11/15/2005 |
| 6910534 | Apparatus for attaching a sensor to a tubing string A method and apparatus, for deploying a sensor attached to tubing in a highly deviated or horizontal wellbore, that are characterized by a stationary attachment system that securely fixes a sensor to a tubing string such that the sensor is coupled to the casing rega... | 06/28/2005 |
| 6877559 | Retrieving a sample of formation fluid in as cased hole A method for retrieving a formation fluid sample through a cased borehole utilizing a sampling tool. Sampling tool straddle packers are set about a first set of perforations and annular fluid is drained from the isolated zone, through a central conduit in the tool a... | 04/12/2005 |
| 6564883 | Rib-mounted logging-while-drilling (LWD) sensors A Logging-while-Drilling method and apparatus for obtaining information about a formation uses a plurality of rib sets with pad-mounted sensor on one or more selectively non-rotating sleeves attached to a rotating housing that is part of a drilling assemb... | 05/20/2003 |
| 6424165 | Electrostatic apparatus for measurement of microfracture strength A new class of materials testing apparatus has been invented. Particularly suited to the measurement of fracture and fatigue properties in the extremely strong materials encountered in microelectromechanical systems, material strains well in excess of 1% ... | 07/23/2002 |
| 6318463 | Slickline fluid indentification tool and method of use Initially, signals relating to well bore fluids that are generated from sensors in presently available down-hole logging tools are analyzed and/or interpreted by an electronic circuit in a well logging tool. The interpretation of these signals can be dire... | 11/20/2001 |
| 6279392 | Method and system for distributed well monitoring A distributed pressure monitoring system is disclosed for monitoring formation pressure along substantial lengths of a casing in a borehole. The monitoring system has a communications line connected to surface facilities on one end which leads down the ca... | 08/28/2001 |
| 6263726 | Sidewall tensiometer and method of determining soil moisture potential in below-grade earthen soil A sidewall tensiometer to in situ determine below-grade soil moisture potential of earthen soil includes, a) a body adapted for insertion into an opening in earthen soil below grade, the body having lateral sidewalls; b) a laterally oriented porous materi... | 07/24/2001 |
| 6260618 | Method for locating placement of a guide stock in a multilateral well A method for locating placement of a guide stock in a multilateral well wherein the guide stock is properly aligned with the lateral borehole. The method employs an impression packer with a scribed reference line to provide information at the surface rega... | 07/17/2001 |
| 6230557 | Formation pressure measurement while drilling utilizing a non-rotating sleeve A downhole tool and method are provided for collecting data from a subsurface formation during drilling operations. The tool includes a tubular mandrel adapted for axial connection in a drill string positioned in a wellbore penetrating the subsurface form... | 05/15/2001 |
| 6179058 | Measuring method and system comprising a semi-rigid extension A system for displacing instruments in a pipe including a portion that is greatly inclined to the vertical. The system includes a set of instruments mechanically linked, by means of an extension, to a first end of electrically-powered displacement device.... | 01/30/2001 |
| 6173787 | Method and system intended for measurements in a horizontal pipe A system and method for displacing instruments in a pipe having a portion thereof which is greatly inclined to the vertical. The system comprises in combination: a set of instruments mechanically linked to a first end of an electrically-powered displaceme... | 01/16/2001 |
| 6173804 | System intended for permanent installation of measuring sondes in a pipe by means of a fluid pressure-actuated removable lock A system intended for permanent installation of measuring sondes against the inner wall of a pipe (1) such as a well or a tube. Measuring sondes (7) are respectively associated with coupling devices (2) that are brought to their respective coupling points... | 01/16/2001 |
