With Override Zone, Diverting, Or Path Blocking Operation Patents (Class 166/272.5)
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Patent number: 12252645Abstract: The patent application discloses a plug useable for isolating sections of a wellbore. The in-situ dissolvable plug comprises a cylindrical body having a backup piece at least at one end of the cylindrical body, a tube and a cylindrical body. The tube may extend through the cylindrical body and backup piece. The cylindrical body may be made of dissolvable material comprising an external surface, and an inner bore surface formed around the tube. The cylindrical body is soft, moldable, and expandable vertical to the tube to form an in-situ plug at downhole.Type: GrantFiled: July 26, 2023Date of Patent: March 18, 2025Assignees: CNPC USA CORPORATION, BEIJING HUAMEI, INC., CHINA NATIONAL PETROLEUM CORPORATIONInventors: Lei Zhao, Jiaxiang (Jason) Ren, Jianpeng Yue, Peng Cheng
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Patent number: 11719081Abstract: Disclosed is a method for performing integral plugging control on water invasion and steam channeling of an edge-bottom water heavy oil reservoir. The method for performing integral plugging control on water invasion and steam channeling of an edge-bottom water heavy oil reservoir comprises the following steps: (1) selecting an oil reservoir; (2) arranging a huff-puff well; (3) performing steam huff-puff development; and (4) performing integral plugging control. An integral plugging control technology is used for the method, a high-strength nitrogen foam system is injected by means of well rows at different positions in the oil reservoir, and effective plugging walls are formed at different positions from the edge-bottom water to reduce water invasion and steam channeling.Type: GrantFiled: April 30, 2020Date of Patent: August 8, 2023Assignee: CHINA UNIVERSITY OF PETROLEUMInventors: Teng Lu, Zhaomin Li, Binfei Li, Songyan Li
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Patent number: 11578254Abstract: Recovering heavy oil from a subterraneous formation penetrated by at least one injection well and one production well, by injecting into the injection well a mixture of steam and an alkyl alkoxylated carboxylate salt, increasing the apparent viscosity of the steam while at the same time lowering the steam mobility, and recovering oil from the subterranean formation.Type: GrantFiled: March 15, 2019Date of Patent: February 14, 2023Assignee: Sasol Chemicals GmbHInventors: Thu Nguyen, Renke Rommerskirchen, Jorge Fernandez
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Patent number: 8616278Abstract: Certain viscous oil reservoirs are too deep to be commercially mined but lack an adequate top seal to employ in situ recovery methods such as SAGD. Without an adequate top seal, gases from the reservoir can rise into overlying aquifers and potentially to the surface. While ice-like hydrates would not normally form above the oil reservoir during in situ recovery, an additive can be added to promote hydrate formation. In this way, a hydrate barrier can be formed to act as a top seal to contain these gases.Type: GrantFiled: May 2, 2011Date of Patent: December 31, 2013Assignee: ExxonMobil Upstream Research CompanyInventors: Thomas J. Boone, Mori Y. Kwan
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Patent number: 8602099Abstract: The present invention relates to a process for the production of mineral oil from mineral oil deposits with large temperature gradients, in which, for increasing the mineral oil yield, highly permeable regions of the mineral oil formation are blocked by injecting formulations which, after being forced into the deposit, form highly viscous gels under the influence of the deposit temperature. A plurality of portions of the formulation which in each case can form gels at different temperatures and therefore result in very complete blocking of highly permeable regions of the formation are used.Type: GrantFiled: October 20, 2010Date of Patent: December 10, 2013Assignees: Wintershall Holding GmbH, Institute of Petroleum Chemistry of the Siberian Branch of the Russian AcademyInventors: Vladimir Stehle, Konrad Siemer, Volker Riha, Dmitry Kuznetsov, Liubov Altunina, Vladimir A. Kuvshinov
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Patent number: 8056627Abstract: A borehole system having a permeability controlled flow profile including a tubular string; one or more permeability control devices disposed in the string; and the plurality of permeability control devices being selected to produce particular pressure drops for fluid entering or exiting various discrete locations along the string and method.Type: GrantFiled: June 2, 2009Date of Patent: November 15, 2011Assignee: Baker Hughes IncorporatedInventors: Michael H. Johnson, Namhyo Kim
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Patent number: 7814968Abstract: A hydrocarbon production apparatus comprises an injection well, perforated casing, hydrocarbon viscosity reducing fluid injection tubing, a first wellbore restrictor, and a production well. The injection well is bored above the production well within a hydrocarbon reservoir below a ground surface. The injection well comprises a heel end and a toe end. The perforated casing is positioned along a length of the injection well. The hydrocarbon viscosity reducing fluid injection tubing is disposed within the injection well and has a hydrocarbon viscosity reducing fluid injection end. The first wellbore restrictor is transversely disposed within the perforated casing to control hydrocarbon viscosity reducing fluid flow along the injection well, the first wellbore restrictor being spaced closer to the toe end of the injection well than the hydrocarbon viscosity reducing fluid injection end of the hydrocarbon viscosity reducing fluid injection tubing is to the toe end.Type: GrantFiled: August 26, 2008Date of Patent: October 19, 2010Inventor: Dustin Bizon
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Patent number: 7621326Abstract: Recovery of viscous hydrocarbon by hot fluid injection from subterranean formations is assisted by using a specially designed and under-reamed vertical well to form a central production cavity; combined with a plurality of specially perforated horizontal wells drilled from the surface down to the producing formation, and then drilled laterally to intersect and be operatively connected to the central production well cavity. These continuous horizontal uniwells™ behave as single wells with two wellheads, each with multiple injection-production perforation pairs, between which the controlled flow of hot oil via a specialized annular communication zone. The production process is controlled by modulating the hot oil flow where the wellbore fluids act as a hydraulic “P-trap” seal limiting steam bypass. The hot displaced oil is allowed to drain from the lateral horizontal wells in to the central collection cavity.Type: GrantFiled: April 13, 2006Date of Patent: November 24, 2009Inventor: Henry B Crichlow
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Patent number: 6679326Abstract: The invention comprises a high pressure fluid barrier forming an enclosure boundary with respect to overburden and floor strata separated by one or more production strata containing desirable fluidizable deposits and/or potential reaction materials. A centrally located Super Daisy Shaft delivers a highest pressure fluid to the enclosure boundary by way of envelope conduits extending laterally horizontal and/or downward from the Super Daisy Shaft (or a trench from which such conduits may also extend) into the production strata.Type: GrantFiled: January 15, 2002Date of Patent: January 20, 2004Inventor: Bohdan Zakiewicz