Patents by Inventor Alexander Telfer
Alexander Telfer 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: 20160265296Abstract: A system and method for milling a casing in a wellbore wherein an upper milling portion of a milling system engages a track of a lower guide system of the milling system in order to orient the upper milling portion. The upper milling portion moves along a track from a first position to a second position, where the the upper milling portion is securedly affixed to the lower guide portion. A traveling guide arm is used to move the milling portion along a travel path. A piston on the traveling guide arm is disposed between first and second fluid chambers, with a throughbore in the piston forming a fluid path between the two chambers. An adjustable valve in the throughbore is controlled by a proximity sensor to alter the flow of fluid between the chambers. The sensor monitors the distance between a fixed and moving point of the milling system.Type: ApplicationFiled: December 31, 2013Publication date: September 15, 2016Inventors: Andrew S. Gendre, Stuart Alexander Telfer
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Publication number: 20160145956Abstract: A method includes conveying a whipstock and a latch anchor into a parent wellbore, the latch anchor being attached to the whipstock at a releasable connection and the parent wellbore being lined with casing that includes a latch coupling. The latch anchor is secured to the latch coupling and the whipstock is then separated from the latch anchor at the releasable connection and thereby exposing a portion of the releasable connection. The whipstock is then removed from the parent wellbore and a completion deflector is subsequently conveyed into the parent wellbore in combination with lateral tubing (with or without a multilateral junction positioned thereabove), and the completion deflector is attached to the latch coupling at the releasable connection. The lateral tubing (with or without multilateral junction positioned thereabove) is then installed to correct depth.Type: ApplicationFiled: May 7, 2015Publication date: May 26, 2016Applicant: Halliburton Energy Services, Inc.Inventors: Espen Dahl, Stuart Alexander Telfer, Peder Bru, Frode Lindland
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Patent number: 9140081Abstract: A system for circumferentially aligning a downhole latch subsystem in a wellbore. The system includes an outer tool assembly including a latch coupling having a latch profile and a slot subassembly having an axially extending slot profile. An inner tool assembly is positionable within the outer tool assembly. The inner tool assembly includes a latch assembly having a plurality of latch keys and an orienting subassembly having a plurality orienting keys. In operation, after axial alignment of the orienting subassembly with the slot subassembly, rotation of the orienting subassembly causes operable engagement of at least one orienting key with the slot profile and, thereafter, axial alignment of the latch assembly with the latch coupling causes operable engagement of the latch keys with the latch profile.Type: GrantFiled: February 1, 2014Date of Patent: September 22, 2015Assignee: Halliburton Energy Services, Inc.Inventors: Stuart Alexander Telfer, Espen Dahl, David Joe Steele, Lester Barett Dupler
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Publication number: 20140144617Abstract: A system for circumferentially aligning a downhole latch subsystem in a wellbore. The system includes an outer tool assembly including a latch coupling having a latch profile and a slot subassembly having an axially extending slot profile. An inner tool assembly is positionable within the outer tool assembly. The inner tool assembly includes a latch assembly having a plurality of latch keys and an orienting subassembly having a plurality orienting keys. In operation, after axial alignment of the orienting subassembly with the slot subassembly, rotation of the orienting subassembly causes operable engagement of at least one orienting key with the slot profile and, thereafter, axial alignment of the latch assembly with the latch coupling causes operable engagement of the latch keys with the latch profile.Type: ApplicationFiled: February 1, 2014Publication date: May 29, 2014Applicant: Halliburton Energy Services, Inc.Inventors: Stuart Alexander Telfer, Espen Dahl, David Joe Steele, Lester Barett Dupler
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Patent number: 8678097Abstract: A system for circumferentially aligning a downhole latch subsystem in a wellbore. The system includes an outer tool assembly including a latch coupling having a latch profile and a slot subassembly having an axially extending slot profile. An inner tool assembly is positionable within the outer tool assembly. The inner tool assembly includes a latch assembly having a plurality of latch keys and an orienting subassembly having a plurality orienting keys. In operation, after axial alignment of the orienting subassembly with the slot subassembly, rotation of the orienting subassembly causes operable engagement of at least one orienting key with the slot profile and, thereafter, axial alignment of the latch assembly with the latch coupling causes operable engagement of the latch keys with the latch profile.Type: GrantFiled: July 18, 2013Date of Patent: March 25, 2014Assignee: Halliburton Energy Services, Inc.Inventors: Stuart Alexander Telfer, Espen Dahl, David Joe Steele, Lester Barett Dupler
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Patent number: 8505621Abstract: Assemblies can be disposed in a subterranean bore. An assembly can include a recessed portion in an inner wall and another recessed portion in an outer wall. The recessed portions can each be configured to have a cross-sectional thickness that is less than at least another part of the assembly. The assembly can provide a seal between an inner region defined by the assembly and an environment exterior to the assembly prior to a window being created in the recessed portion in the outer wall through which a branch wellbore can be formed. The recessed portion in the inner wall can guide a cutting tool toward the recessed portion in the outer wall.Type: GrantFiled: March 30, 2010Date of Patent: August 13, 2013Assignee: Halliburton Energy Services, Inc.Inventors: Stuart Alexander Telfer, Dan Parnell Saurer
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Patent number: 8215400Abstract: A system for opening a window in a casing string (42) positioned in a wellbore (32). The system includes a hydraulic pressure intensifier (116) having a housing and a piston assembly with a differential piston area. The piston assembly is longitudinally shiftable relative to the housing and is initially secured relative thereto to prevent longitudinal movement therebetween. An anchor assembly (114) is operable to longitudinally secure the hydraulic pressure intensifier (116) within the casing string (42). A window opening tool (118) operably associated with the hydraulic pressure intensifier (116) is operably engagable with the casing string (42) such that when the anchor assembly (114) is longitudinally secured within the casing string (42) and the piston assembly is unsecured relative to the housing under hydrostatic pressure, longitudinal movement of the piston assembly transmits a force to the window opening tool (118), thereby opening the window in the casing string (42).Type: GrantFiled: October 29, 2010Date of Patent: July 10, 2012Assignee: Halliburton Energy Services, Inc.Inventors: Thomas Owen Roane, Stuart Alexander Telfer
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Publication number: 20120103612Abstract: A system for opening a window in a casing string (42) positioned in a wellbore (32). The system includes a hydraulic pressure intensifier (116) having a housing and a piston assembly with a differential piston area. The piston assembly is longitudinally shiftable relative to the housing and is initially secured relative thereto to prevent longitudinal movement therebetween. An anchor assembly (114) is operable to longitudinally secure the hydraulic pressure intensifier (116) within the casing string (42). A window opening tool (118) operably associated with the hydraulic pressure intensifier (116) is operably engagable with the casing string (42) such that when the anchor assembly (114) is longitudinally secured within the casing string (42) and the piston assembly is unsecured relative to the housing under hydrostatic pressure, longitudinal movement of the piston assembly transmits a force to the window opening tool (118), thereby opening the window in the casing string (42).Type: ApplicationFiled: October 29, 2010Publication date: May 3, 2012Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Thomas Owen Roane, Stuart Alexander Telfer
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Publication number: 20110240282Abstract: Assemblies that can be disposed in a subterranean bore are described. An assembly can include a recessed portion in an inner wall and another recessed portion in an outer wall. The recessed portions can each be configured to have a cross-sectional thickness that is less than at least another part of the assembly. The assembly can provide a seal between an inner region defined by the assembly and an environment exterior to the assembly prior to a window being created in the recessed portion in the outer wall through which a branch wellbore can be formed. The recessed portion in the inner wall can guide a cutting tool toward the recessed portion in the outer wall.Type: ApplicationFiled: March 30, 2010Publication date: October 6, 2011Inventors: Stuart Alexander Telfer, Dan Parnell Saurer
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Patent number: 4890484Abstract: The determination of total suspended solids (non-filterable residue) in water and waste water is automated to operate without operator intervention. Volatile total suspended solids can also be determined.Type: GrantFiled: January 28, 1988Date of Patent: January 2, 1990Assignee: Shell Oil CompanyInventors: Alexander Telfer, Joseph C. Raia
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Patent number: 4870278Abstract: The range of a neutron backscatter fluid level detector is extended to provide essentially continuous level indication by interpolating neutron backscatter counts of neutrons supplied from a plurality of sources at various heights.Type: GrantFiled: June 8, 1988Date of Patent: September 26, 1989Assignee: Shell Oil CompanyInventors: Anthony M. Leonardi-Cattolica, Dale H. McMillan, Alexander Telfer
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Patent number: 4829837Abstract: Robotic liquid separation operates independently of liquid volume, viscosity, or optical characteristics, by sensing changes in the dielectric constant of the liquid as it is being drawn through a cannula. The cannula has electrodes which form a sensing capacitor for detecting the changes in the liquid dielectric constant as the liquid is drawn therethrough.Type: GrantFiled: January 28, 1988Date of Patent: May 16, 1989Assignee: Shell Oil CompanyInventor: Alexander Telfer
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Patent number: 4820425Abstract: A capacitance liquid sensor for a filtration station for a robotic liquid analyzer detects conclusion of the fluid filtration step by return of the capacitance in the station to its original value.Type: GrantFiled: January 28, 1988Date of Patent: April 11, 1989Assignee: Shell Oil CompanyInventor: Alexander Telfer
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Patent number: 4358682Abstract: A fixed neutron backscatter level detector for hydrogen containing liquids or solids. The detector comprises a source of fast neutrons and a thermal neutron detector disposed to measure thermal neutrons that are backscattered by the liquids or solids.Type: GrantFiled: July 7, 1980Date of Patent: November 9, 1982Assignee: Shell Oil CompanyInventors: Alexander Telfer, Dale H. McMillan
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Patent number: 4216376Abstract: An apparatus for measuring the level of a low mass element material in an enclosed vessel. The apparatus comprises a long probe having a source of fast neutrons and a detector of slow neutrons mounted at one end. The length of the probe ensures the safety of the operator and means are provided for remotely depositing the source in a shielded vessel so that it may be safely transported.Type: GrantFiled: June 22, 1978Date of Patent: August 5, 1980Assignee: Shell Oil CompanyInventors: Leonard H. Griffin, Richard H. Hunt, Alexander Telfer