Patents by Inventor Alexei Bolshakov
Alexei Bolshakov has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20060260864Abstract: A plurality of heavy mass irregularities attached to an inner wall of the drill collar attenuate waves traveling through the collar. The plurality of heavy mass irregularities are spaced and sized for the maximum attenuation of acoustic pulses in a predetermined frequency range. The mass irregularities may be rings secured to the inner surface of the collar by neck pieces, extending outwardly from the outer circumference of the ring. The mass irregularities may be made of steel or tungsten and are between six and ten in number. The spacing of the irregularities may lie between twelve and fourteen centimeters. A center pipe may be included to isolate the irregularities from the fluid flow associated with the drilling operation. The pipe may be of a soft material such as rubber to reduce transfer of acoustic noise along the drill string. The irregularities may be in an oil based fluid with the pipe fitting closely in the center of the rings.Type: ApplicationFiled: April 25, 2006Publication date: November 23, 2006Applicant: Baker Hughes IncorporatedInventors: Sergey Egerev, Vladimir Belov, Vladimir Dubinsky, Alexei Bolshakov, Victor Tiutekin, Victor Yushin
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Publication number: 20060198243Abstract: A method and apparatus useful to determine the integrity of a cement bond log disposed in the annular space between a casing and a wellbore. The method and apparatus induce a Lamb wave in the casing and into the wellbore. The Lamb wave attenuates upon passage through the cement bond log. The integrity of the cement bond log can be determined through an analysis and evaluation of the attenuation results.Type: ApplicationFiled: March 2, 2005Publication date: September 7, 2006Inventors: Xiao-Ming Tang, Alexei Bolshakov, Joseph Barolak, Douglas Patterson, Vladimir Dubinsky, Ron Alers, George Alers
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Patent number: 7032707Abstract: A plurality of heavy mass irregularities attached to an inner wall of the drill collar attenuate waves traveling through the collar. The plurality of heavy mass irregularities are spaced and sized for the maximum attenuation of acoustic pulses in a predetermined frequency range. The mass irregularities may be rings secured to the inner surface of the collar by neck pieces, extending outwardly from the outer circumference of the ring. The mass irregularities may be made of steel or tungsten and are between six and ten in number. The spacing of the irregularities may lie between twelve and fourteen centimeters. A center pipe may be included to isolate the irregularities from the fluid flow associated with the drilling operation. The pipe may be of a soft material such as rubber to reduce transfer of acoustic noise along the drill string. The irregularities may be in an oil based fluid with the pipe fitting closely in the center of the rings.Type: GrantFiled: July 1, 2003Date of Patent: April 25, 2006Assignee: Baker Hughes IncorporatedInventors: Sergey Egerev, Vladimir Belov, Vladimir Dubinsky, Alexei Bolshakov, Victor Tiutekin, Victor Yushin
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Patent number: 7028806Abstract: An apparatus for performing acoustic investigations while drilling a borehole in a subsurface geological formation comprises a longitudinally extending assembly conveyed in the borehole on a drilling tubular. The assembly and the drilling tubular have a drilling fluid flowing through a longitudinally extending passage therein. An acoustic transmitter is supported by the assembly. The transmitter generates acoustic signals in the assembly, the borehole and the subsurface formation. An acoustic receiver is spaced apart from the transmitter and receive the acoustic signals. An attenuator is located in the assembly between the acoustic transmitter and the acoustic receiver for attenuating the acoustic signals in the assembly within a predetermined frequency range. The attenuator comprises a tubular element of a composite material having a substantially cylindrical outer surface. The outer surface has a plurality of spaced apart masses having a predetermined spacing, mass and length firmly attached thereto.Type: GrantFiled: July 2, 2004Date of Patent: April 18, 2006Assignee: Baker Hughes IncorporatedInventors: Vladimir Dubinsky, Alexei Bolshakov
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Publication number: 20050205248Abstract: A bond log device comprising a sonde, an acoustic transducer, and an acoustic receiver. The acoustic transducer is comprised of a magnet combined with a coil, where the coil is energizable by an electrical current source. The acoustic transducer can also be comprised of an electromagnetic acoustic device. The acoustic transducer is capable of producing various waveforms, including compressional waves, shear waves, transversely polarized shear waves, Rayleigh waves, Lamb waves, and combinations thereof.Type: ApplicationFiled: March 17, 2004Publication date: September 22, 2005Inventors: Joseph Barolak, Alexei Bolshakov, Vladimir Dubinsky, Douglas Patterson
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Publication number: 20050190648Abstract: A method and apparatus useful to determine the integrity of a cement bond log disposed in the annular space between a casing and a wellbore. The method and apparatus produce a transversely polarized shear wave and emit the wave through the casing and into the wellbore. The transversely polarized shear wave attenuates upon passage through the cement bond log. The integrity of the cement bond log can be determined through an analysis and evaluation of the attenuation results.Type: ApplicationFiled: February 26, 2004Publication date: September 1, 2005Inventors: Xiao-Ming Tang, Alexei Bolshakov, Tsili Wang, Douglas Patterson
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Patent number: 6915875Abstract: A plurality of heavy mass irregularities attached to an inner wall of the drill collar attenuate waves traveling through the collar. The plurality of heavy mass irregularities are spaced and sized for the maximum attenuation of acoustic pulses in a predetermined frequency range. The mass irregularities may be rings firmly coupled to the outer surface of the collar. Alternatively, the mass irregularities may be rings firmly coupled to the outer collar surface by neck pieces, extending inwardly from the inner circumference of the ring. The mass irregularities may be made of steel or tungsten. In another preferred embodiment, the mass irregularities are asymmetrically coupled to an outer collar wall for providing preferential directional attenuation.Type: GrantFiled: January 10, 2002Date of Patent: July 12, 2005Assignee: Baker Hughes IncorporatedInventors: Vladimir Dubinsky, Alexei Bolshakov
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Publication number: 20050023074Abstract: An apparatus for performing acoustic investigations while drilling a borehole in a subsurface geological formation comprises a longitudinally extending assembly conveyed in the borehole on a drilling tubular. The assembly and the drilling tubular have a drilling fluid flowing through a longitudinally extending passage in the assembly and the drilling tubular. An acoustic transmitter is supported by the assembly. The transmitter generates acoustic signals in the assembly, the borehole and the subsurface formation. An acoustic receiver is spaced apart from the transmitter and receive the acoustic signals. An attenuator is located in the assembly between the acoustic transmitter and the acoustic receiver for attenuating the acoustic signals in the assembly within a predetermined frequency range. The attenuator comprises a tubular element of a composite material having a substantially cylindrical outer surface.Type: ApplicationFiled: July 2, 2004Publication date: February 3, 2005Applicant: Baker Hughes IncorporatedInventors: Vladimir Dubinsky, Alexei Bolshakov
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Patent number: 6769497Abstract: Determination of the rate of penetration (ROP) of drilling has usually been based upon surface measurements and may not be an accurate representation of the actual ROP. This can cause problems in Logging While Drilling (LWD). Because of the lack of a high-speed surface-to-downhole communication while drilling, a conventional method of measuring ROP at the surface does not provide a solution to this problem. However, the instantaneous ROP can be derived downhole with a certain degree of accuracy by utilizing an accelerometer placed in (or near) the tool to measure acceleration in the axial direction. When three-component accelerometers are used, the method may be used to determine the true vertical depth of the borehole.Type: GrantFiled: June 11, 2002Date of Patent: August 3, 2004Assignee: Baker Hughes IncorporatedInventors: Vladimir Dubinsky, Pushkar N. Jogi, James V. Leggett, III, Douglas J. Patterson, Alexei Bolshakov, Volker Krueger
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Publication number: 20040104068Abstract: A plurality of heavy mass irregularities attached to an inner wall of the drill collar attenuate waves traveling through the collar. The plurality of heavy mass irregularities are spaced and sized for the maximum attenuation of acoustic pulses in a predetermined frequency range. The mass irregularities may be rings secured to the inner surface of the collar by neck pieces, extending outwardly from the outer circumference of the ring. The mass irregularities may be made of steel or tungsten and are between six and ten in number. The spacing of the irregularities may lie between twelve and fourteen centimeters. A center pipe may be included to isolate the irregularities from the fluid flow associated with the drilling operation. The pipe may be of a soft material such as rubber to reduce transfer of acoustic noise along the drill string. The irregularities may be in an oil based fluid with the pipe fitting closely in the center of the rings.Type: ApplicationFiled: July 1, 2003Publication date: June 3, 2004Applicant: Baker Hughes IncorporatedInventors: Sergey Egerev, Vladimir Belov, Vladimir Dubinsky, Alexei Bolshakov, Victor Tiutekin, Victor Yushin
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Patent number: 6615949Abstract: A plurality of heavy mass irregularities attached to an inner wall of the drill collar attenuate waves traveling through the collar. The plurality of heavy mass irregularities are spaced and sized for the maximum attenuation of acoustic pulses in a predetermined frequency range. The mass irregularities may be rings secured to the inner surface of the collar by neck pieces, extending outwardly from the outer circumference of the ring. The mass irregularities may be made of steel or tungsten and are between six and ten in number. The spacing of the irregularities may lie between twelve and fourteen centimeters. A center pipe may be included to isolate the irregularities from the fluid flow associated with the drilling operation. The pipe may be of a soft material such as rubber to reduce transfer of acoustic noise along the drill string. The irregularities may be in an oil based fluid with the pipe fitting closely in the center of the rings.Type: GrantFiled: May 31, 2000Date of Patent: September 9, 2003Assignee: Baker Hughes IncorporatedInventors: Sergey Egerev, Vladimir Belov, Vladimir Dubinsky, Alexei Bolshakov, Victor Tiutekin, Victor Yushin
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Publication number: 20020195276Abstract: Determination of the rate of penetration (ROP) of drilling has usually been based upon surface measurements and may not be an accurate representation of the actual ROP. This can cause problems in Logging While Drilling (LWD). Because of the lack of a high-speed surface-to-downhole communication while drilling, a conventional method of measuring ROP at the surface does not provide a solution to this problem. However, the instantaneous ROP can be derived downhole with a certain degree of accuracy by utilizing an accelerometer placed in (or near) the tool to measure acceleration in the axial direction. When three-component accelerometers are used, the method may be used to determine the true vertical depth of the borehole.Type: ApplicationFiled: June 11, 2002Publication date: December 26, 2002Applicant: Baker Hughes, Inc.Inventors: Vladimir Dubinsky, Pushkar N. Jogi, James V. Leggett, Douglas J. Patterson, Alexei Bolshakov, Volker Krueger
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Publication number: 20020157895Abstract: A plurality of heavy mass irregularities attached to an inner wall of the drill collar attenuate waves traveling through the collar. The plurality of heavy mass irregularities are spaced and sized for the maximum attenuation of acoustic pulses in a predetermined frequency range. The mass irregularities may be rings firmly coupled to the outer surface of the collar. Alternatively, the mass irregularities may be rings firmly coupled to the outer collar surface by neck pieces, extending inwardly from the inner circumference of the ring. The mass irregularities may be made of steel or tungsten. In another preferred embodiment, the mass irregularities are asymmetrically coupled to an outer collar wall for providing preferential directional attenuation.Type: ApplicationFiled: January 10, 2002Publication date: October 31, 2002Applicant: Baker Hughes IncorporatedInventors: Vladimir Dubinsky, Alexei Bolshakov
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Patent number: 6023443Abstract: The present invention provides a system for drilling boreholes having a downhole subassembly which contains an acoustic measurement-while-drilling system. It uses the acoustic velocity through the formations surrounding the borehole and an acoustic transmitter and a set of receivers for determining the bed boundaries surrounding the borehole formation. Semblance of the data is determined in a slowness/intercept-time domain. Coherence and semblance filtering methods are used to differentiate between reflection signals and noise. The position and orientation of the bed boundary relative to the tool are determined. A further processing step uses the relative position and orientation determined for a number of tool positions to further discriminate against noise and obtain an absolute position and depth of the bed boundaries.Type: GrantFiled: July 8, 1998Date of Patent: February 8, 2000Assignee: Baker Hughes IncorporatedInventors: Vladimir Dubinsky, Alexei Bolshakov, James V. Leggett, III