Patents by Inventor Friedhelm Makohl
Friedhelm Makohl 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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Patent number: 7234546Abstract: A method and associated equipment are disclosed which allow drilling at least a portion of a well and subsequently cementing casing in a single trip. The method is particularly suited for deep-water offshore operations where the drill string can be run through a section of casing leaving a bit and an under-reamer extending out below. The casing is equipped with ports through which cement can be pumped as well as an external casing packer to prevent the uncured cement in the annulus from U-tubing. Several casing sections can be run in during drilling and cemented succession using the one trip method.Type: GrantFiled: April 2, 2003Date of Patent: June 26, 2007Assignee: Baker Hughes IncorporatedInventors: Ray P. Vincent, Frank Koehrmann, George E. Givens, Christiaan D. Krauss, Edward T. Wood, Friedhelm Makohl, David B. Haughton
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Patent number: 6850068Abstract: A method and apparatus for obtaining a resistivity measurement of an earth formation surrounding a borehole in an MWD device uses an electrode for injecting current into the earth formation and an electrode for obtaining a responsive signal from the borehole. The electrodes are located on the drill bit arm or blade. Measured resistivity values are obtained at the location of the drill bit. Measurements can be taken in both oil-based mud and water-based mud environments. Maximum or minimum resistivity can be used to best represent the resistivity of the surrounding formation.Type: GrantFiled: June 16, 2003Date of Patent: February 1, 2005Assignee: Baker Hughes IncorporatedInventors: Roland E. Chemali, Paul Pastusek, Friedhelm Makohl, René N. Ritter, Martin Townley Evans, Stanley T. Hewitt
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Publication number: 20040104726Abstract: A method and apparatus for obtaining a resistivity measurement of an earth formation surrounding a borehole in an MWD device uses an electrode for injecting current into the earth formation and an electrode for obtaining a responsive signal from the borehole. The electrodes are located on the drill bit arm or blade. Measured resistivity values are obtained at the location of the drill bit. Measurements can be taken in both oil-based mud and water-based mud environments. Maximum or minimum resistivity can be used to best represent the resistivity of the surrounding formation.Type: ApplicationFiled: June 16, 2003Publication date: June 3, 2004Applicant: Baker Hughes IncorporatedInventors: Roland E. Chemali, Paul Pastusek, Friedhelm Makohl, Rene N. Ritter, Martin Townley Evans, Stanley T. Hewitt
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Publication number: 20040003944Abstract: A method and associated equipment are disclosed which allow drilling at least a portion of a well and subsequently cementing casing in a single trip. The method is particularly suited for deep-water offshore operations where the drill string can be run through a section of casing leaving a bit and an under-reamer extending out below. The casing is equipped with ports through which cement can be pumped as well as an external casing packer to prevent the uncured cement in the annulus from U-tubing. Several casing sections can be run in during drilling and cemented succession using the one trip method.Type: ApplicationFiled: April 2, 2003Publication date: January 8, 2004Inventors: Ray P. Vincent, Frank Koehrmann, George E. Givens, Christiaan D. Krauss, Edward T. Wood, Friedhelm Makohl, David B. Haughton
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Publication number: 20030056991Abstract: The present invention provides apparatus and method for drilling a wellbore wherein a pilot wellbore section is drilled with a bit which section is enlarged by a trailing underreamer to the desired size. One or more steering sections between the underreamer and the drill bit are utilized for maintaining and changing the drilling direction. Each steering section includes a plurality of independently adjustable force application devices on a non-rotating sleeve. If an expandable liner is used, then an expansion device disposed above the underreamer expands the liner during retrieval of the drilling assembly to the surface.Type: ApplicationFiled: July 12, 2002Publication date: March 27, 2003Applicant: Baker Hughes IncorporatedInventors: Detlef Hahn, Friedhelm Makohl
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Patent number: 6419033Abstract: The present invention provides apparatus and method for drilling a wellbore wherein a pilot wellbore section is drilled with a bit which section is enlarged by a trailing underreamer to the desired size. One or more steering sections between the underreamer and the drill bit are utilized for maintaining and changing the drilling direction. Each steering section includes a plurality of independently adjustable force application devices on a non-rotating sleeve. If an expandable liner is used, then an expansion device disposed above the underreamer expands the liner during retrieval of the drilling assembly to the surface.Type: GrantFiled: December 8, 2000Date of Patent: July 16, 2002Assignee: Baker Hughes IncorporatedInventors: Detlef Hahn, Friedhelm Makohl
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Patent number: 6390201Abstract: A method of creating a downhole sealing and hanging device comprising the steps of lowering a first tubular in a well bore, then lowering through the first tubular a second tubular with slightly smaller external diameter than the internal diameter of the first tubular, and made of formable steel, in such a way that the upper section of the second tubular remains within the lower section of the first tubular, and finally plastically expanding at least the upper section of the second tubular by application of a radial force to the interior of the upper section of the second tubular thereby creating an interference fit capable of forming a bond and a hydraulic seal between the first and second tubular.Type: GrantFiled: July 5, 2000Date of Patent: May 21, 2002Assignee: Shell Oil CompanyInventors: Robert Joe Coon, Timothy John Frank, Friedhelm Makohl
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Publication number: 20010045300Abstract: This invention provides a bottomhole assembly that contains a thruster for applying an axial force on the drill bit during drilling of the wellbore. The bottomhole assembly includes at least one sensor which provides measurements for determining a parameter of interest relating to the drilling of the wellbore. A power unit supplies power to the thruster to move a member toward the drill bit to apply the force on the drill bit. A processor operatively coupled to the thruster controls the magnitude of the force generated by the thruster in response to one or more parameters interest.Type: ApplicationFiled: March 18, 1999Publication date: November 29, 2001Inventors: ROGER FINCHER, VOLKER KRUEGER, PETER FONTANA, FRIEDHELM MAKOHL
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Patent number: 6196336Abstract: A drilling liner having a core bit at its bottom end is carried along with a pilot bit on an inner bottom hole assembly driven by a downhole mud motor. In one embodiment, the motor is powered by mud carried by an inner string. Alternatively, the inner string may be omitted and the flow of mud through the liner powers the motor: this requires a locking tool for locking the motor assembly to the outer assembly. Once an abnormally (high or low) pressured zone has been traversed, the liner is set as a casing, the inner assembly is pulled out, and drilling may be resumed using a conventional tool. Directional drilling is accomplished by having an MWD device for providing directional information and having directional devices on the inner and outer assembly. These include retractable steering pads. Expandable bits, under-reamers and jetting nozzles may also be used in the drilling process.Type: GrantFiled: December 4, 1998Date of Patent: March 6, 2001Assignee: Baker Hughes IncorporatedInventors: Roger Fincher, Larry Watkins, Friedhelm Makohl, Detlef Hahn
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Patent number: 6032744Abstract: An apparatus for injection of coiled tubing or jointed tubulars into a well bore, using an injector head capable of handling either type of tubular. The injector head and a working platform are mounted on a structure over the well head, with the injector being positioned so as to allow personnel access to the tubing on the working platform without having to relocate the injector head away from the well head location. The injector can be mounted below the working platform, or it can be mounted spaced above the working platform on a vertically movable trolley on a mast. When the injector is mounted below the working platform, the tubulars and any bottom hole assembly are accessible to personnel on top of the working platform, whether coiled tubing or jointed tubulars are being used.Type: GrantFiled: February 25, 1999Date of Patent: March 7, 2000Assignee: Baker Hughes IncorporatedInventors: Philip Burge, Peter Fontana, Glenn Leroux, Friedhelm Makohl
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Patent number: 5890534Abstract: Apparatus for handling pipe, coiled tubing, casing, and conventional tubing in well drilling and servicing operations.Type: GrantFiled: September 25, 1997Date of Patent: April 6, 1999Assignee: Baker Hughes IncorporatedInventors: Philip Burge, Peter Fontana, Friedhelm Makohl
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Patent number: 5875850Abstract: An apparatus for injection of coiled tubing or jointed tubulars into a well bore, using an injector head capable of handling either type of tubular. The injector head and a working platform are mounted on a structure over the well head, with the injector being positioned so as to allow personnel access to the tubing on the working platform without having to relocate the injector head away from the well head location. The injector can be mounted below the working platform, or it can be mounted spaced above the working platform on a vertically movable trolley on a mast. When the injector is mounted below the working platform, the tubulars and any bottom hole assembly are accessible to personnel on top of the working platform, whether coiled tubing or jointed tubulars are being used.Type: GrantFiled: August 22, 1997Date of Patent: March 2, 1999Assignee: Baker Hughes IncorporatedInventors: Philip Burge, Peter Fontana, Glenn Leroux, Friedhelm Makohl
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Patent number: 5845708Abstract: Apparatus for handling pipe, coiled tubing, casing and conventional tubing in well drilling and servicing operations.Type: GrantFiled: March 26, 1997Date of Patent: December 8, 1998Assignee: Baker Hughes IncorporatedInventors: Philip Burge, Friedhelm Makohl, Peter Fontana
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Patent number: 5823267Abstract: An apparatus for injection of coiled tubing or jointed tubulars into a well bore, using an injector head capable of handling either type of tubular. The injector head and a working platform are mounted on a structure over the well head, with the injector being positioned so as to allow personnel access to the tubing on the working platform without having to relocate the injector head away from the well head location. The injector can be mounted below the working platform, or it can be mounted spaced above the working platform on a vertically movable trolley on a mast. When the injector is mounted below the working platform, the tubulars and any bottom hole assembly are accessible to personnel on top of the working platform, whether coiled tubing or jointed tubulars are being used.Type: GrantFiled: August 22, 1997Date of Patent: October 20, 1998Assignee: Baker Hughes IncorporatedInventors: Philip Burge, Peter Fontana, Glenn Leroux, Friedhelm Makohl
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Patent number: 5738173Abstract: An apparatus for injection of coiled tubing or jointed tubulars into a well bore, using an injector head capable of handling either type of tubular. The injector head and a working platform are mounted on a structure over the well head, with the injector being positioned so as to allow personnel access to the tubing on the working platform without having to relocate the injector head away from the well head location. The injector can be mounted below the working platform, or it can be mounted spaced above the working platform on a vertically movable trolley on a mast. When the injector is mounted below the working platform, the tubulars and any bottom hole assembly are accessible to personnel on top of the working platform, whether coiled tubing or jointed tubulars are being used.Type: GrantFiled: February 13, 1996Date of Patent: April 14, 1998Assignee: Baker Hughes IncorporatedInventors: Philip Burge, Peter Fontana, Glenn Leroux, Friedhelm Makohl
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Patent number: 5205364Abstract: The present invention is a drilling tool including a telescoping assembly for transmitting hydraulic force to the drill bit at the bottom of the tool. The internal hydraulic characteristics of the tool may be varied to vary the force through extension and retraction of the telescoping assembly.Type: GrantFiled: July 30, 1991Date of Patent: April 27, 1993Inventors: Rainer Juergens, Friedhelm Makohl
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Patent number: 4773489Abstract: A core drilling tool for bore-holes includes a stem for connection to the string and an outer rotating tube for rotating a drill bit mounted thereon. A core tube is mounted in a central passage by a latch means to remove the core tube and/or replace it. The outer tube is rotated by a downhole motor such as a Moineau type motor. The diameter of the central passage through the stator is equal to the maximum diameter of the core tube plus the eccentricity of the stator to permit passage of the core tube into and out of the tool. Thus coring can be achieved without tripping the tool. Various details of the structure are described.Type: GrantFiled: April 15, 1987Date of Patent: September 27, 1988Assignee: Eastman Christensen CompanyInventor: Friedhelm Makohl
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Patent number: 4485880Abstract: A direct drive for deep-well drill bits on the Moineau displacement principle is provided with locking means detents (10, 11) which are disposed downstream of the working chambers (4) of rotor (3) and stator (2). Actuation of the locking means is effected by coupling throw-in members (13) introduced through the flushing passage from above. Passage through the working chambers and into the locking means detents groove (16, 20, 21) is rendered possible for the throw-in members on relative rotation of rotor and stator.Type: GrantFiled: August 1, 1983Date of Patent: December 4, 1984Assignee: Norton Christensen, Inc.Inventor: Friedhelm Makohl