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| Number | Title | Issue Date |
| 7044236 | Shot direction indicating device One embodiment of the present invention discloses a shot indication device that indicates the orientation of a downhole tool that is inside of a wellbore at a particular time. The shot indication device can also be used to determine the orientation of a perforating ... | 05/16/2006 |
| 6929063 | Cutting locator tool Disclosed herein is a locator system for a cutting device in combination with a production string. Where the production string has at least one detent along its circumference. The invention also comprises a lock formed to engage the detent, a cutting device, and a b... | 08/16/2005 |
| 6772843 | Sea-floor pressure head assembly A method for eliminating the presence of micro-annuluses associated with a subsea hydrocarbon producing wellbore for accurate gathering of data within the subsea hydrocarbon producing wellbore. The method involves using a sea floor pressure head assembly in conjunct... | 08/10/2004 |
| 6353322 | Method for automatically calibrating resistivity well logs for effects of change in wellbore diameter and circuit drift A method for determining the resistivity of earth formations penetrated by a wellbore. Electrical current is imparted to the wellbore and the earth formations from a first electrode located on a mandrel disposed in the wellbore. The electrical current is ... | 03/05/2002 |
| 6219619 | Inhomogeneous background-based software focusing method for array-type induction logging tools A method of focusing the measurements from an array type induction logging tool using an inhomogeneous background rather than a homogeneous background. A modeled inhomogeneous background response can be separated from the measured response and focused dir... | 04/17/2001 |
| 6218662 | Downhole carbon dioxide gas analyzer A logging tool system for analyzing the carbon dioxide concentration in a fluid sample downhole in a borehole. A chamber is filled with the fluid sample and is closed to isolate the fluid sample from the borehole. The interior chamber volume is expanded t... | 04/17/2001 |
| 6196319 | Hydraulic sand removal tool An apparatus and method for removing sand and other debris from a wellbore. The apparatus is particularly suited for wireline operation, and requires minimal surface equipment. A housing is lowered into the wellbore until the housing is proximate to the s... | 03/06/2001 |
| 6179069 | Breakout control to enhance wellbore stability A method for encouraging breakout formation during the formation of hydrocarbon producing wellbores. Breakouts are encouraged during drilling operations to increase the stability of the formation rock immediately adjacent to the wellbore. The weight of dr... | 01/30/2001 |
| 6116337 | Articulated downhole electrical isolation joint An articulated connector for providing electrical insulation between downhole well equipment such as logging sondes suspended by a wireline. Articulated joints are connected to the well equipment to provide for the desired movement, and the joints are con... | 09/12/2000 |
| 6111409 | Nuclear magnetic reasonance fluid characterization apparatus and method for using with electric wireline formation testing instruments A method for characterizing a fluid sample withdrawn from an earth formation. The method includes performing nuclear magnetic resonant spin echo measurements on the fluid sample at a nuclear magnetic resonant frequency of carbon-13. Amplitudes of the spin... | 08/29/2000 |
| 6108605 | Low distortion digitally controlled transmitter for use in a well logging tool A system and method for controlling the transmitted signal for use in a well logging tool, using an iterative method (preferably the method of steepest descent) such that the transmitted signal more closely resembles a desired waveform.... | 08/22/2000 |
| 6095258 | Pressure actuated safety switch for oil well perforating A perforating gun assembly for perforating wellbores, comprising a shaped charge carrier assembly, a detonating cord for initiation OF shaped charges in the carrier assembly, an initiator attached to the detonating cord for initiating the cord on applicat... | 08/01/2000 |
| 6060885 | Method and apparatus for determining the resistivity and conductivity of geological formations surrounding a borehole A differential array instrument for determining selected parameters of an earth formation surrounding a borehole, including an instrument mandrel carrying a single source electrode for injecting an electrical current of a predetermined value into the form... | 05/09/2000 |
| 5955884 | Method and apparatus for measuring transient electromagnetic and electrical energy components propagated in an earth formation A single well transient electromagnetic ("TEM") apparatus and method is disclosed. The invention includes a wireline logging tool adapted for disposition in a borehole drilled in earth formations that has mounted thereon an electromagnetic transmitter and... | 09/21/1999 |
| 5883515 | Method of determining formation resistivity utilizing combined measurements of inductive and galvanic logging instruments A method of determining selected parameters of an earth formation surrounding a borehole by first, obtaining at least one induction logging measurement of the selected parameters in a first predetermined volume of the formation surrounding the borehole ha... | 03/16/1999 |
| 5631562 | Time domain electromagnetic well logging sensor including arcuate microwave strip lines An electromagnetic well logging tool for imaging the electrical characteristics of a borehole. A tool inserted into the borehole includes the appropriate mechanical apparatus to align a plurality of transmission lines adjacent to the borehole wall without... | 05/20/1997 |
| 5617927 | Sidewall rotary coring tool A sidewall coring tool for wireline use in an earth bore hole is provided which includes an elongated tool body adapted for suspension within the bore hole by the wireline cable at a selected depth, low speed high torque rotary coring bit apparatus mounte... | 04/08/1997 |
| 5586027 | Method and apparatus for determining flow rates in multi-phase fluid flow mixtures Method and apparatus are disclosed for determining the water cut of an oil-water flow in a wellbore having a known deviation angle less than 90. A first step includes generating a set of predicted response curves where each response curve relates discrete... | 12/17/1996 |
| 5411106 | Method and apparatus for acquiring and identifying multiple sidewall core samples A method and apparatus for acquiring a plurality of sidewall cores from an earth formation intersected by a wellbore while a coring tool is located downhole. A sidewall coring tool is provided having an internal core receptacle for receiving and storing s... | 05/02/1995 |
| 5303775 | Method and apparatus for acquiring and processing subsurface samples of connate fluid A method and apparatus is provided for use in connection with a downhole formation testing instrument for acquisition of a phase intact sample of connate fluid for delivery via a pressure containing sample tank to a laboratory facility. One or more fluid ... | 04/19/1994 |
| 5209304 | Propulsion apparatus for positioning selected tools in tubular members A propulsion apparatus is provided for attachment to a selected tool for propelling and positioning the tool in a tubular member in response to fluid pressure in the tubular member and includes a tubular mandrel terminating in a lower free end, a tubular ... | 05/11/1993 |
| 5182955 | Borehole formation model for testing nuclear logging instruments The borehole formation model is built by stacking in a spaced relationship selected glass plates to simulate the formation. Each glass plate has a circular hole in the center to simulate the oil or gas borehole. The hole can be sized in different sets to ... | 02/02/1993 |
| 5157331 | Enhanced wide aperture groove for antenna of downhole resistivity tool In an electromagnetic propagating antenna circumferential groove disposed in an MWD resistivity tool mandrel and normally sealed with an epoxy resin non-conducting material forming an annular ring disposed in each of the plurality of circumferential groov... | 10/20/1992 |
| 5101104 | Carrier apparatus for radioactive well logging instrument A carrier apparatus for a radioactive well logging instrument is disclosed that includes an elongated generally cylindrical tool body adapted for wireline suspension within a well borehole and mounting an elongated sensor pad assembly carrying a radioacti... | 03/31/1992 |
| 5089989 | Method and apparatus for measuring the quality of a cement to a casing bond A new "radial" cement bond instrument is disclosed for measuring the quality of cement to casing bond. The instrument is capable of measuring the quality of the cement bond both vertically and circumferentially. Four arrays of sectored transmitters and re... | 02/18/1992 |
| 4961343 | Method for determining permeability in hydrocarbon wells During oil and gas well drilling operations, at the wellsite surface the percentage by volume of hydrocarbon gas present in the return drilling fluid is monitored in order to determine the percentage of gas saturation in the formation. Rate of penetration... | 10/09/1990 |
| 4842093 | Vehicular theft prevention system and method A system and method for preventing unauthorized starting of a motor vehicle. A timing interval of preselected duration is generated only upon detecting positioning of an ignition switch to a first position by means of a proper key inserted into the vehicl... | 06/27/1989 |
| 4839986 | Grafting apparatus A hand-held tool for making grafting-flap cuts in the bark of a tree limb includes an elongated tubular body having an open end for accommodating coaxial insertion of the limb. The end of the body adjacent the open end has a plurality of elongated slots l... | 06/20/1989 |
| 4785758 | Releasable marine anchor Apparatus for releasably mooring a marine vessel. An elongate anchor stem terminates at opposing ends with a swiveling connector assembly adapted for attachment to a boat anchor line and a fluke assembly. The fluke assembly includes a base plate with a pl... | 11/22/1988 |
| 4765182 | System and method for hydrocarbon reserve evaluation During oil and gas well drilling operations, drilling fluid volume circulated per preselected vertical borehole increment drilled is continuously measured as well as the percentage by volume of hydrocarbon gas present in the return fluid. The gas is perio... | 08/23/1988 |
| 4761838 | Contrast-healing water spa system In one exemplar embodiment, a contrast-healing water spa system is disclosed that includes a single monolithically formed tub having two approximately equal-sized chambers that are separated by an integrally formed insulated structural wall that will prov... | 08/09/1988 |
| 4759126 | Knife for de-veining, peeling and butterflying shrimp In one exemplar embodiment, a knife for de-veining, peeling and butterflying shrimp is disclosed having a handle and an elongated arcuate knife blade secured to the handle and extending forwardly thereof, the knife blade having an intermediate toothed bla... | 07/26/1988 |
| 4749124 | Card A card for conveying short messages and information in the nature of a postal card or the like. The card defines a front and back surface suitable for receiving printed material. A crease is formed in the card so as to define a flap rotatable about the cr... | 06/07/1988 |
| 4734241 | Method for protecting a pre-formed projecting appendage during plastic molding Method and apparatus are disclosed for injection molding a generally cylindrical sleeve-like penile prosthesis from a thermoplastic or thermosetting material utilizing a male mold core and a pair of female mold halves in which the molded prosthesis has en... | 03/29/1988 |
| 4705331 | Subsea clamping apparatus A self-actuating clamp for attachment to a structural member in a subsea environment is disclosed. The clamp includes a housing having spaced side members, a transverse compression plate mounted between the members across the top of the housing and extern... | 11/10/1987 |
| 4690135 | Male impotence prosthesis In an external device for receiving and positioning the male penis in a simulation of an erection to overcome impotence, which includes a flexible hollow cylindrical body enclosed at one end and having the other end open for receiving inserting the penis ... | 09/01/1987 |
| 4646683 | Method and apparatus for producing parasitic mites In one exemplar embodiment, method and apparatus are disclosed for producing parasitic mites in quantities sufficient for commercial use as a biological control agent for selected insect pests. A parent stock of the parasitic mites is produced of which th... | 03/03/1987 |
| 4644285 | Method and apparatus for direct measurement of current density In a cathodic protection system for protecting a metal structure in contact with a surrounding electrolytic medium, method and apparatus are provided for directly measuring current density. A small metal sample cathode of a like material as the metal stru... | 02/17/1987 |
| 4623116 | Apparatus for protecting a pre-formed projecting appendage during plastic molding Apparatus are disclosed for injection molding a generally cylindrical sleeve-like penile prosthesis from a thermoplastic or thermosetting material utilizing a male mold core and a pair of female mold halves in which the molded prosthesis has encased in a ... | 11/18/1986 |
| 4571145 | Combination handling and conveying apparatus In one exemplar embodiment, an apparatus for handling and conveying materials is disclosed having a movable chassis, a longitudinally extendable conveyor assembly mounted on the chassis, the conveyor having a projecting loading end capable of limited long... | 02/18/1986 |
