Patents by Inventor Donald Perkins
Donald Perkins 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: 9593546Abstract: Well tools including valves operable by low electrical input. One well tool includes a valve which controls fluid communication between pressure regions in a well, the valve including a rotatable member which is biased to rotate, and a brake or clutch which prevents rotation of the member. Another valve includes a barrier which separates reactants, with the valve being operable in response to the barrier being opened and the reactants thereby reacting with each other. Yet another valve includes a barrier which separates the pressure regions, and a control circuit which heats the barrier to a weakened state. Another valve includes a member displaceable between open and closed positions, a restraining device which resists displacement of the member, and a control device which degrades or deactivates the restraining device and thereby permits the member to displace between its open and closed positions, in response to receipt of a predetermined signal.Type: GrantFiled: June 6, 2012Date of Patent: March 14, 2017Assignee: Halliburton Energy Services, Inc.Inventors: Adam D. Wright, Michael L. Fripp, Kevin D. Fink, Donald Perkins, Jimmie R. Williamson, Mark D. Kalman
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Patent number: 8997881Abstract: A method of supporting a pressure bearing wall against a pressure differential applied across the wall can include positioning a support structure proximate the pressure bearing wall, the support structure having a support surface formed thereon, and the support surface contacting the pressure bearing wall and supporting the wall against the pressure differential. A pressure bearing housing assembly can include a pressure bearing wall and a support structure which supports the pressure bearing wall against a pressure differential applied across the wall. A well system can comprise a well tool including a pressure bearing housing assembly exposed to pressure in a wellbore, whereby a pressure differential is applied across a pressure bearing wall of the housing assembly, the pressure bearing wall being supported against the pressure differential by a support structure.Type: GrantFiled: October 13, 2010Date of Patent: April 7, 2015Assignee: Halliburton Energy Services, Inc.Inventors: Paul D. Ringgenberg, Adam H. Martin, Donald Perkins
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Publication number: 20120241143Abstract: Well tools including valves operable by low electrical input. One well tool includes a valve which controls fluid communication between pressure regions in a well, the valve including a rotatable member which is biased to rotate, and a brake or clutch which prevents rotation of the member. Another valve includes a barrier which separates reactants, with the valve being operable in response to the barrier being opened and the reactants thereby reacting with each other. Yet another valve includes a barrier which separates the pressure regions, and a control circuit which heats the barrier to a weakened state. Another valve includes a member displaceable between open and closed positions, a restraining device which resists displacement of the member, and a control device which degrades or deactivates the restraining device and thereby permits the member to displace between its open and closed positions, in response to receipt of a predetermined signal.Type: ApplicationFiled: June 6, 2012Publication date: September 27, 2012Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Adam D. Wright, Michael L. Fripp, Kevin D. Fink, Donald Perkins, Jimmie R. Williamson, Mark D. Kalman
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Patent number: 8235103Abstract: Well tools including valves operable by low electrical input. One well tool includes a valve which controls fluid communication between pressure regions in a well, the valve including a rotatable member which is biased to rotate, and a brake or clutch which prevents rotation of the member. Another valve includes a barrier which separates reactants, with the valve being operable in response to the barrier being opened and the reactants thereby reacting with each other. Yet another valve includes a barrier which separates the pressure regions, and a control circuit which heats the barrier to a weakened state. Another valve includes a member displaceable between open and closed positions, a restraining device which resists displacement of the member, and a control device which degrades or deactivates the restraining device and thereby permits the member to displace between its open and closed positions, in response to receipt of a predetermined signal.Type: GrantFiled: January 14, 2009Date of Patent: August 7, 2012Assignee: Halliburton Energy Services, Inc.Inventors: Adam D. Wright, Michael L. Fripp, Kevin D. Fink, Donald Perkins, Jimmie R. Williamson, Mark D. Kalman
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Publication number: 20120090854Abstract: A method of supporting a pressure bearing wall against a pressure differential applied across the wall can include positioning a support structure proximate the pressure bearing wall, the support structure having a support surface formed thereon, and the support surface contacting the pressure bearing wall and supporting the wall against the pressure differential. A pressure bearing housing assembly can include a pressure bearing wall and a support structure which supports the pressure bearing wall against a pressure differential applied across the wall. A well system can comprise a well tool including a pressure bearing housing assembly exposed to pressure in a wellbore, whereby a pressure differential is applied across a pressure bearing wall of the housing assembly, the pressure bearing wall being supported against the pressure differential by a support structure.Type: ApplicationFiled: October 13, 2010Publication date: April 19, 2012Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Paul D. RINGGENBERG, Adam H. MARTIN, Donald PERKINS
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Publication number: 20100175867Abstract: Well tools including valves operable by low electrical input. One well tool includes a valve which controls fluid communication between pressure regions in a well, the valve including a rotatable member which is biased to rotate, and a brake or clutch which prevents rotation of the member. Another valve includes a barrier which separates reactants, with the valve being operable in response to the barrier being opened and the reactants thereby reacting with each other. Yet another valve includes a barrier which separates the pressure regions, and a control circuit which heats the barrier to a weakened state. Another valve includes a member displaceable between open and closed positions, a restraining device which resists displacement of the member, and a control device which degrades or deactivates the restraining device and thereby permits the member to displace between its open and closed positions, in response to receipt of a predetermined signal.Type: ApplicationFiled: January 14, 2009Publication date: July 15, 2010Applicant: HALLIBURTON ENERGY SERVICES, INC.Inventors: Adam D. Wright, Michael L. Fripp, Kevin D. Fink, Donald Perkins, Jimmie R. Williamson, Mark D. Kalman
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Publication number: 20090298849Abstract: Compositions, methods, uses and assemblages for the preferential induction of cell division cycle arrest and/or apoptosis, in a first population of cells compared to a second population of cells employ either: (i) an opioid or opioid-like agent and an NF-?B activating agent, which agents are other than the opioid-like agent trans-U50488 in combination with an NF-?B activating agent selected from etoposide and nocodazole; (ii) a ligand for a sigma receptor, or (iii) an opioid or opioid-like agent wherein the cells of the first population are other than tumour cells.Type: ApplicationFiled: July 6, 2009Publication date: December 3, 2009Inventors: Barbara Ann Spruce, Neil Donald Perkins, Jayne Samson, Niall McTavish
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Patent number: 7572762Abstract: Compositions, methods, uses and assemblages for the preferential induction of cell division cycle arrest and/or apoptosis, in a first population of cells compared to a second population of cells employ either: (i) an opioid or opioid-like agent and an NF-?B activating agent, which agents are other than the opioid-like agent trans-U50488 in combination with an NF-?B activating agent selected from etoposide and nocodazole; (ii) a ligand for a sigma receptor, or (iii) an opioid or opioid-like agent wherein the cells of the first population are other than tumor cells.Type: GrantFiled: June 29, 1999Date of Patent: August 11, 2009Assignee: University of DundeeInventors: Barbara Ann Spruce, Neil Donald Perkins, Jayne Samson, Niall McTavish
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Publication number: 20070255885Abstract: System and method for switching logic in a Universal Serial Bus hub. The USB hub may include upstream logic and downstream logic for sending and receiving information from a host controller and a USB device respectively. The USB hub may include a plurality of ports operable to couple to a plurality of devices, including a first port coupled to the upstream logic and a second port coupled to the downstream logic. The USB hub may also include switching logic operable to switch the upstream and the downstream logic with respect to the first port and the second port respectively. The switching logic may switch the upstream and downstream logic by decoupling the first port from the upstream logic, decoupling the second port from the downstream logic, and coupling the second port to the upstream logic. Additionally, the first port may be coupled to the downstream logic.Type: ApplicationFiled: April 27, 2006Publication date: November 1, 2007Inventors: Mark Bohm, Donald Perkins, Carl Crawford
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Publication number: 20070068262Abstract: A fiber optic differential pressure sensor. In a described embodiment, a differential pressure sensor system for use in a subterranean well includes a fluid property sensing housing having a flow passage formed therethrough. A differential pressure sensor has an optical fiber extending in a wall having a first side and a second side, each of the first and second sides being exposed to pressure in the flow passage.Type: ApplicationFiled: November 9, 2006Publication date: March 29, 2007Inventors: Neal Skinner, John Dennis, Donald Perkins
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Publication number: 20050274194Abstract: A fiber optic differential pressure sensor. In a described embodiment, a differential pressure sensor system for use in a subterranean well includes a fluid property sensing housing having a flow passage formed therethrough. A differential pressure sensor has an optical fiber extending in a wall having a first side and a second side, each of the first and second sides being exposed to pressure in the flow passage.Type: ApplicationFiled: June 15, 2004Publication date: December 15, 2005Inventors: Neal Skinner, John Dennis, Donald Perkins
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Patent number: D250023Type: GrantFiled: January 21, 1977Date of Patent: October 24, 1978Assignee: American Telecommunications Corp.Inventors: George Donald Perkins, Donald Albert Winton