Class 166/901 - WELLS IN FROZEN TERRAIN

Subclass of Class 166 - Wells
Definition: Subject matter specialized to well operations in locations
No. of patents: 35
Last issue date: 01/29/2008

Number	Title	Issue Date
7322415	Subterranean electro-thermal heating system and method A subterranean electro-thermal heating system including one or more heater cable sections extending through one or more heat target regions of a subterranean environment and one or more cold lead sections coupled to the heater cable section(s) and extending through ...	01/29/2008
7316275	Well treating compositions containing water superabsorbent material and method of using the same A well treating composition containing a polysaccharide-based water-superabsorbent material has particularly applicability as a thermal insulating, fracturing or acid stimulation fluid. The water-superabsorbent material is capable of absorbing, at a minimum, its own...	01/08/2008
7306039	Methods of using crosslinkable compositions A thermal insulating packer fluid contains water and/or brine, a crosslinkable viscosifying polymer, a crosslinking agent and an optional set retarder. The composition is capable of inhibiting unwanted heat loss from production tubing or uncontrolled heat transfer t...	12/11/2007
7219733	Zeolite compositions for lowering maximum cementing temperature Zeolite compositions having a low maximum setting temperature for use in permafrost and waterwell applications are provided. ...	05/22/2007
7219735	Packer fluid A packer fluid is provided for use with a wellbore fluid in an annulus or casing bore, having an aqueous portion which contains additives for preventing corrosion, microbiological activity, salt and scale deposition, and an environmentally-acceptable capping fluid w...	05/22/2007
6955220	Process of well cementing in cold environment The present invention provides improved well cementing methods for use in cold environment, where the circulating temperature of the cement is typically within the range of 5 to 20° C. The improved well cementing methods include forming compositions that are essent...	10/18/2005
6953091	Cementing compositions including a dispersant agent for cementing operation in oil wells The invention concerns a cementing composition for cold zones cementing operations in an oil well or analogous, said composition comprising a aqueous fluid base, solid particles including cement particles, and a dispersing agent in solution in the aqueous fluid base...	10/11/2005
6776227	Wellhead heating apparatus and method Apparatus and method for heating and preventing freeze-off of wellhead equipment utilize radiant heat from a flameless heater to heat fluid in a heat exchanger, such as a tank or finned radiator. A pump is used to circulate the heated fluid through a conduit loop de...	08/17/2004
6328110	Process for destroying a rigid thermal insulator positioned in a confined space Process for destroying a rigid thermal insulator obtained in particular by a process of the sol-gel type and positioned in a confined space, the process comprising the stage of introducing a dissolving liquid into the confined space in order to convert th...	12/11/2001
6283215	Process for thermal insulation of production tubings placed in a well by means of a non-rigid foam and a system for working a fluid producing well A process for insulating a tubing string placed in a pipe and through which a fluid circulates, the insulant being a non-rigid foam produced from a liquid solution and placed in the annular space defined by the outside of the tubing string and the walls o...	09/04/2001
6260615	Method and apparatus for de-icing oilwells A power cable for an ESP is used also for heating well bores in cold climates. An electrical switch is located within a wellbore at a selected location in the power cable. The electrical switch is provided to selectively short out the conductors within th...	07/17/2001
6032732	Well head heating system The present invention relates to a system for heating the well head assembly of a conventional oil well pumper. The system functions by routing a portion of the engine coolant from the pumper engine to a heat tracing loop. This loop enables a portion of t...	03/07/2000
6009940	Production in frigid environments A method and apparatus for producing (e.g. heavy oil) through a wellbore which passes through a permafrost layer. To maintain an acceptable flow temperature inside the production tubing, a heating element (e.g. electrical power cable having its leads shor...	01/04/2000
5248005	Self-propelled drilling module There is provided a portable drilling module that is preferably mounted onto a self-propelled carrier. Winterizing panels enclose equipment mounted aboard the module and provide an environmentally sheltered space for workmen. In particular, the panels ful...	09/28/1993
5125857	Harness method for use in cold weather oil field operations and apparatus A method and apparatus is presented for facilitating the installation of electrical cables in sub-zero temperatures by heating the cables to make them more flexible and easier to work with. The cables and the workers thereon are sheltered from the element...	06/30/1992
4574884	Drainhole and downhole hot fluid generation oil recovery method Viscous oil is recovered by a process that increases sweep efficiency and heat and fuel utilization and that reduces well and compression requirements and costs. Initially, fluid pressure communication is created between two horizontal drainhole wells in ...	03/11/1986
4528104	Oil based packer fluids An oil base packer fluid for use in completing oil and gas wells comprising: (a) a liquid oleaginous medium; (b) an organophilic clay comprising the reaction product of an organic onium compound and a smectite clay; (c) a polar dispersant for said clay; and (d...	07/09/1985
4522258	Unitized well testing apparatus for use in hostile environments A modular well testing unit for use in hostile environments provides a plurality of modular sections providing upon assembly an enclosed structure for housing the components of the well testing unit, each of the modular sections being self-supporting and ...	06/11/1985
4444263	Permanent thermal packer method A permanent thermal packer is disclosed for sealing the annulus between an injection tubing string and a well casing. The packer is thermal cement and is placed from within the injection tubing string to seal a substantial portion of the annulus above the...	04/24/1984
4413679	Wellbore cathodic protection A method for the cathodic protection of metal conduit in a wellbore in permafrost wherein a predetermined electric current is impressed between said conduit and an anode, the improvement comprising setting said anode in the permafrost away from the wellbo...	11/08/1983
4348056	Method for above-ground leaching of metal bearing ores at below-freezing temperatures Disclosed is a method permitting above-ground heap leaching of metal bearing ores in below-freezing temperatures by utilizing one or more insulating layers deposited on the principal ore body to be leached. One of said layers is an insulating ore layer co...	09/07/1982
4258791	Thermal insulation method A method of insulating a well bore with a pumpable, oil base packer fluid which gels to a thick grease-like consistency at elevated temperatures, the packer fluid comprising a liquid oleaginous phase, an aqueous phase, an oleophilic polymer such as a copo...	03/31/1981
4202413	Well cementing process using presheared water swellable clays A method of preparing and using a cement slurry having water swellable clays therein as extenders for the cement is described, which method enhances the effectiveness of the water swellable clays by preshearing aqueous suspensions thereof prior to mixing ...	05/13/1980
4176720	Well cementing in permafrost A process for cementing a string of pipe in the permafrost region of a borehole of a well wherein aqueous drilling fluid actually used in drilling the wellbore in the permafrost region of a wellbore is employed. The drilling fluid contains or is adjusted ...	12/04/1979
4125289	Method for in situ minefields A circulation tubing string is disposed about the lixiviant return tubing string in the production hole of an in situ minefield. The circulation string extends from the surface to a point near a packer which defines the top of the leaching interval. A flu...	11/14/1978
4077472	Well flow control system and method A well system and method for completing petroleum oil and gas wells having special application to extreme environmental settings such as platform, sub sea, and floating vessel operations, and wells in frozen regions such as the Arctic, and the like. The i...	03/07/1978
4036285	Arrangement to control heat flow between a member and its environment An arrangement of insulating, thermal absorbing and/or dissipating elements controlling heat flow between a member and its environment. In certain permafrost environments, for example, one or more elements of the system can include a heat sink and/or a th...	07/19/1977
3995695	Method for completing a well in a permafrost zone In a method for completing a well in a permafrost zone wherein an at least partially freezable liquid may be left in at least one annulus of the well in the permafrost zone, the method of washing the freezable liquid from the at least one annulus using fr...	12/07/1976
3990502	Arrangement to control heat flow between a member and its environment An arrangement of insulating, thermal absorbing and/or dissipating elements controlling heat flow between a member and its environment. In certain permafrost environments, for example, one or more elements of the system can include a heat sink and/or a th...	11/09/1976
3986781	Structure for protecting and insulating frozen substrates and method for producing such structures An insulating and protective structure for frozen substrates wherein a hydrophobic or water impermeable base layer is applied first to the substrate and successive layers of a polyurethane foam or similar synthetic plastic foam material are foamed in plac...	10/19/1976
3973626	Well completion in permafrost A method for displacing a freezable liquid from a permafrost zone in a wellbore and replacing the displaced freezable liquid with an essentially nonfreezable liquid, wherein the nonfreezable liquid is introduced into the wellbore and displaced freezable l...	08/10/1976
3971441	Well completion in permafrost A method for completing a well whose wellbore passes through a permafrost zone, the wellbore having at least one annulus in the permafrost zone, the annulus initially containing a freezable liquid. In the method openable and closable apertures are dispose...	07/27/1976
3968999	Method of making available fuels from arctic environments A method of making available economical fuels from arctic environments without melting the permafrost along a transportation right of way characterized by preparing a liquid fuel having a viscosity below 2 centipoises at 32°F; cooling and transporting th...	07/13/1976
3948313	Arrangement to control heat flow between a member and its environment An arrangement of insulating, thermal absorbing and/or dissipating elements controlling heat flow between a member and its environment. In certain permafrost environments, for example, one or more elements of the system can include a heat sink and/or a th...	04/06/1976
3937282	Method for cementing wells in low temperature formations The present invention relates to a composition and method for cementing pipe and casing in wells in low temperature earth formations and relates more particularly to the cementing of casing oil and gas wells drilled through permafrost formations....	02/10/1976

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Class 166/901 - WELLS IN FROZEN TERRAIN