Borst; Stephen L. - US Patent Attorneys and Agents

Attorney: Borst; Stephen L.

Number of patents: 72
Last date: July 04, 1995

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Number	Title	Issue Date
5429648	Process for inducing porosity in an abrasive article The invention is a process of manufacturing an abrasive article with the steps of forming an abrasive article in the unfired state comprising an abrasive, a vitreous bond and a polymer resin wherein the polymer resin has an elastic modulus greater than ab...	07/04/1995
5224969	Diamond having multiple coatings and methods for their manufacture A diamond element having good bonding properties and a method for fabricating the diamond element in which a diamond substrate is coated by and bonded to a first layer of chromium carbide, a second layer containing titanium, vanadium, zirconium, niobium, ...	07/06/1993
5126207	Diamond having multiple coatings and methods for their manufacture A diamond element having good bonding properties and a method for fabricating the diamond element in which a diamond substrate is coated by and bonded to a first layer of chromium carbide, a second layer containing titanium is bonded to said first layer, ...	06/30/1992
4899682	Catamaran-type semisubmersible drilling vessel for offshore drilling The semisubmersible drilling vessel has two spaced, parallel, horizontal, elongated submersible hulls which support a deck and a deck mounting structure. The deck has a central opening overhanging the space between the two hulls and is surmounted by a der...	02/13/1990
4886129	Well drilling operation control procedure The invention relates to the control of rotary type oil drilling operations. During a drilling test in which the drill string is held against vertical motion at the surface, known as the "drill-off test", an exponential decrease as a function of time, in ...	12/12/1989
4879463	Method and apparatus for subsurface formation evaluation A measurement while drilling nuclear tool adapted to be coupled in the drill string to make formation evaluations and methods of using are described. A neutron source is positioned on the cylindrical axis of the tool while a connected gamma ray source is ...	11/07/1989
4878382	Method of monitoring the drilling operations by analyzing the circulating drilling mud Samples of mud are taken periodically at the surface at one or several locations where the mud does not contain cuttings anymore. The mud samples are analyzed on the rig site to determine the successive values, as a function of time or depth, of a paramet...	11/07/1989
4879654	Drilling fluid A drilling fluid to be circulated through a borehole as it is drilled is produced by mixing solid and liquid drilling fluid components in such proportions that the density of the fluid has a selected value which lies between upper and lower limits (c) cal...	11/07/1989
4876886	Method for detecting drilling events from measurement while drilling sensors Downhole Torque and Rate of Penetration are utilized to develop indications of formations having high porosity or of the development of an undergauge bit. Downhole torque is normalized by dividing it by the product of downhole weight on bit and bit size t...	10/31/1989
4876511	Method and apparatus for testing and calibrating an electromagnetic logging tool A method and apparatus for testing and calibrating an electromagnetic logging tool are described. The tool includes a tansmitting antenna and a receiving antenna. A shielded receiving device is placed around the transmitting antenna and intercepts the tra...	10/24/1989
4867254	Method of controlling fluid influxes in hydrocarbon wells The invention relates to a method of real time control of fluid influxes into an oil well from an underground formation during drilling. The injection pressure pi and return pressure pr and the flow rate Q of the drilling mud circulating ...	09/19/1989
4865393	Method and apparatus for braking a derrick winch The invention relates to the braking, by means of a control lever, of the winch of a derrick equipped with a band brake and located away from the lever. The lever and the band brake are included in a servo-control circuit and connected by an electric tran...	09/12/1989
4856344	Measuring flow in a pipe A gradiomanometer 1 measures the difference in pressure between points 3 and 4 to indicate density and hence proportions of two phases (e.g. liquid and gas), each of known density flowing as indicated by arrow 6. A venturi meter 2 measures the difference ...	08/15/1989
4852665	Method for monitoring the operations of the rotary drilling of a well The invention relates to the monitoring of the drilling operations of a well using a drill bit mounted at the end of a drill string, which can be taken up by the travelling block of a lifting gear installed in a derrick, in order to permit the addition or...	08/01/1989
4852399	Method for determining drilling conditions while drilling Downhole torque and rate of penetration are utilized to develop indications of formations that are porous, argillaceous or tight. This information is useful as an aid in selecting drilling practices and drilling bits. The method separates bit effects from...	08/01/1989
4847815	Sinusoidal pressure pulse generator for measurement while drilling tool A pressure pulse generator which generates relatively sinusoidal pressure pulses in a fluid flowing in a borehole is disclosed. The pressure pulse generator for a MWD tool broadly comprises: a housing adapted to be connected in a tubing string so that flu...	07/11/1989
4843875	Procedure for measuring the rate of penetration of a drill bit The invention relates to a procedure for measuring the rate of penetration VF of a drill bit fixed to the lower end of a drill string lowered into a well. During an initial period, the well is drilled keeping, on average, the value of weight F ...	07/04/1989
4845359	Methods and apparatus for safely handling radioactive sources in measuring-while-drilling tools A method for moving a radioactive source into and out of a well logging tool incorporated in the drill string is disclosed. Prior to moving the source, the logging tool is positioned sufficiently distant from and vertically under the drilling rig floor so...	07/04/1989
4840061	Method of detecting a fluid influx which could lead to a blow-out during the drilling of a borehole This invention is intended for use in the process of drilling an oil well and has to do with a process for the detection of fluid influx which could lead to a blow-out. This process consists of measuring the inlet flow rate A of the drilling mud coming in...	06/20/1989
4833914	Pore pressure formation evaluation while drilling Formation strength and other measurement while drilling parameters are combined in a formation volumetric analysis which produces not only the traditional volumetric components of clay volume, mineral volume, total porosity, and water filled porosity, but...	05/30/1989
4819730	Development drilling system A floating drilling platform having dual work stations is disclosed for performing deep sea drilling and/or hydrocarbon production operations. The structure of the platform is designed to accommodate replaceable modules which facilitate the installation a...	04/11/1989
4814609	Methods and apparatus for safely measuring downhole conditions and formation characteristics while drilling a borehole A borehole logging apparatus for performing radiation based measurements has a tubular body for movement through a borehole. The tubular body includes an upwardly opening passage and an interior chamber for accommodating the positioning and lengthwise ins...	03/21/1989
4807469	Monitoring drilling mud circulation For monitoring drilling mud circulation there is incorporated in the supply mud a known amount or concentration of at least one tracer ion which is substantially non-interactive with the other mud components and with the strata drilled, and the return or ...	02/28/1989
4773263	Method of analyzing vibrations from a drilling bit in a borehole Information on tooth wear is obtained from the frequency distribution spectrum of a vibrational quantity influenced by the impact of cutter teeth on the bottom of a bore. For example, spectra may be obtained from the product of signals indicative of torqu...	09/27/1988
4760735	Method and apparatus for investigating drag and torque loss in the drilling process Drilling conditions are analyzed by, for example, measuring the torque applied at the surface to the drill string and the effective torque acting on the drill bit. The applied torque and effective torque are compared to determine torque loss. Likewise, ap...	08/02/1988
4754641	Method and apparatus for measurement of fluid flow in a drilling rig return line An improved method and apparatus is disclosed for use in a return line system of a drilling rig to determine a volumetric fluid flow rate and, therefore, to aid in detecting a kick in a well. The apparatus comprises an ultrasonic level sensor, an ultrason...	07/05/1988
4703460	Method and apparatus for acoustic dipole direct shear wave well logging The shear velocity of a formation traversed by a fluid-filled open or cased borehole is obtained directly. Waveforms are obtained from a dipole acoustic investigation of the formation relative to a common location in the borehole. In this investigation, t...	10/27/1987
4698792	Method and apparatus for acoustic dipole shear wave well logging The shear velocity of a formation traversed by a fluid-filled borehole is determined in the presence of a significant flexural mode arrival. A plurality of waveforms are obtained from a dipole acoustic investigation of the formation relative to a common l...	10/06/1987
4692707	Method and apparatus for measuring the earth formation resistivity of a plurality of radial regions around a borehole A wall engaging pad for well logging comprises a face portion of electrically conductive material within which are disposed three or more current electrodes. The survey current emitted from the current electrodes is differently focussed. A suitable curren...	09/08/1987
4686364	In situ determination of total carbon and evaluation of source rock therefrom A method for determining in situ the carbon content of a source rock comprises determining the carbon/oxygen elemental ratio of the formation via inelastic gamma spectroscopy, determining the porosity of the formation, obtaining the oxygen contents and de...	08/11/1987
4607352	Method and apparatus for obtaining a display of a characteristic of the periphery of a well The apparatus and method of the present invention pertain to visual presentation systems employing scan lines, wherein each scan line is divisible into sets of points respectively corresponding to locations at which well measurements are made. The resulti...	08/19/1986
4598366	Diffraction tomography systems and methods with arbitrary source and detector array surfaces Diffraction tomography systems and methods are disclosed for the reconstruction of physical properties of two and three-dimensional objects from information collected by detectors located along an arbitrary surface in space. The sources of energy investig...	07/01/1986
4594662	Diffraction tomography systems and methods with fixed detector arrays Diffraction tomography systems and methods are disclosed for the reconstruction of physical properties of two- and three-dimensional objects from information collected by detector arrays which are fixed in space. Improved preprocessing procedures and an o...	06/10/1986
4586382	Surface acoustic wave sensors Pressure sensing diaphragms comprise a cylindrical or spherical crystalline member in which an internal cylindrical or spherical chamber is provided. In the internally loaded embodiments, a fluid is introduced into the chamber and the pressure exerted by ...	05/06/1986
4562540	Diffraction tomography system and methods Diffraction tomography systems and methods are disclosed for the reconstruction of physical properties of two and three-dimensional objects from information collected in one or more diffraction tomographic procedures. A diffraction tomographic system is c...	12/31/1985
4543648	Shot to shot processing for measuring a characteristic of earth formations from inside a borehole A method and apparatus for measuring an earth formation characteristic from inside a borehole penetrating earth formations is described. A tool carrying a sonic transmitter and an array of receivers is moved along the borehole and waveform signals from th...	09/24/1985
4535632	Surface acoustic wave sensors Pressure sensing diaphragms comprise a cylindrical or spherical crystalline member in which an internal cylindrical or spherical chamber is provided. In the internally loaded embodiments, a fluid is introduced into the chamber and the pressure exerted by ...	08/20/1985
4535631	Surface acoustic wave sensors Pressure sensing diaphragms comprise a cylindrical or spherical crystalline member in which an internal cylindrical or spherical chamber is provided. In the internally loaded embodiments, a fluid is introduced into the chamber and the pressure exerted by ...	08/20/1985
4534223	Surface acoustic wave sensors Pressure sensing diaphragms comprise a cylindrical or spherical crystalline member in which an internal cylindrical or spherical chamber is provided. In the internally loaded embodiments, a fluid is introduced into the chamber and the pressure exerted by ...	08/13/1985
4507554	Method and apparatus for determining borehole and formation constituents A method and apparatus for determining the contents of a borehole traversing a subterranean formation is provided. In the method, a well-logging sonde is used to bombard the contents of a borehole and the formation with fast neutrons. An early capture spe...	03/26/1985

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Attorney: Borst; Stephen L.