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7631692 |
Settable compositions comprising a natural pozzolan and associated methods
An embodiment of a method of cementing comprises: introducing a cement composition into a subterranean formation, wherein the cement composition comprises cement kiln dust, a natural pozzolan, and...
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7588081 |
Method of modifying permeability between injection and production wells
The invention provides a method of treating a subterranean formation penetrated by at least one injection well and at least one production well, the method comprising the steps of a) analyzing the...
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7575053 |
Low temperature monitoring system for subsurface barriers
A system for monitoring temperature of a subsurface low temperature zone is described. The system includes a plurality of freeze wells configured to form the low temperature zone, one or more...
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7527094 |
Double barrier system for an in situ conversion process
A barrier system for a subsurface treatment area is described. The barrier system includes a first barrier formed around at least a portion of the subsurface treatment area. The first barrier is...
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7516785 |
Method of developing subsurface freeze zone
A method for lowering the temperature of a portion of a subsurface formation is provided. Preferably, the formation is an oil shale formation. The method includes the step of injecting a cooling...
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7402204 |
Flexible cementing compositions and methods for high-temperature wells
A well cementing composition comprises an hydraulic cement and flexible, acrylonitrile-butadiene copolymer particulate material. A method of cementing a well comprises mixing the composition with...
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7401646 |
Methods for reverse-circulation cementing in subterranean formations
Methods and systems for reverse-circulation cementing in subterranean formations are provided. An example of a method is a method of cementing casing in a subterranean well bore, comprising...
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7387159 |
Blending system for solid/fluids mixtures
The disclosure concerns a method and a system for monitoring the composition of a cement slurry or wellbore service fluid, the method and system including one or more feeder units for solid...
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7343974 |
Method and apparatus for performing chemical treatments of exposed geological formations
A method for strengthening a wellbore with an exposed geological formation, the method including: determining or estimating material properties of the exposed geological formation; determining...
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7303008 |
Methods and systems for reverse-circulation cementing in subterranean formations
Methods and systems for reverse-circulation cementing in subterranean formations are provided. An example of a method is a method of cementing casing in a subterranean well bore, comprising...
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7281576 |
Apparatus and methods for sealing voids in a subterranean formation
Downhole tools that include an outer tubing disposed around an inner tubing for placement of a sealant mixture into a void in a subterranean formation and associated methods of use are provided....
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7128142 |
Apparatus and methods for improved fluid displacement in subterranean formations
Apparatus and methods for determining suitable displacement fluids for use in subterranean cementing operations, and methods of cementing that use such displacement fluids, are provided. Examples...
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7128149 |
Apparatus and methods for improved fluid displacement in subterranean formations
Apparatus and methods for determining suitable displacement fluids for use in subterranean cementing operations, and methods of cementing that use such displacement fluids, are provided. Examples...
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7128148 |
Well treatment fluid and methods for blocking permeability of a subterranean zone
The present invention provides a method and treatment fluid for blocking the permeability of an elevated-temperature zone in a reservoir of a subterranean formation penetrated by a wellbore, the...
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7096944 |
Well fluids and methods of use in subterranean formations
The present invention relates to improved well fluids that include hollow particles, and to methods of using such improved well fluids in subterranean cementing operations. The present invention...
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7066256 |
Apparatus and method of detecting interfaces between well fluids
An apparatus for use in circulating cement in a casing in a wellbore is described having a first component such as a sensor disposed on the casing and a second component such as a detectable device...
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7013971 |
Reverse circulation cementing process
A method of cementing a casing in a wellbore with a tool having a plurality of holes therethrough connected at a lower end of the casing. The total cross-sectional area of the holes is preferably...
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6994164 |
Method for enhancing the stability of a water sensitive, reactive subterranean formation
The current invention provides a method for enhancing the formation stability of water sensitive, reactive formations penetrated by a wellbore. The method of the current invention provides an...
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6994167 |
Method and system for cement lining a wellbore
The invention describes a method of cement lining a wellbore to enable a fixed sensor internal of the lining to sense characteristics of the external formations surrounding the wellbore using, at...
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6802373 |
Apparatus and method of detecting interfaces between well fluids
An apparatus for use in circulating cement in a casing in a wellbore is described having a first component such as a sensor disposed on the casing and a second component such as a detectable device...
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6802375 |
Method for plugging a well with a resin
A method for carrying out well construction, repair and abandonment operations, the method involves introducing a resin into a well and curing the same to form a seal, plug or connection, wherein...
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6693554 |
Casing mounted sensors, actuators and generators
A casing sensor and methods for sensing using a casing sensor are disclosed. The casing sensor includes a casing shoe and a sensor coupled to the casing shoe. A casing data relay includes a...
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6675895 |
Well cementing
The combination of the cement contamination laboratory measurements and the field log measurement allows to perform the evaluation of cement placement and quality related to the designed percentage...
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6668923 |
Positive indication system for well annulus cement displacement
An annulus collar around a well production tube is cast in cement by a procedure that axially delineates the collar between two expandable well packers in the production tube string. Between the...
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6634425 |
Instrumented cementing plug and system
A system for cementing a tubular member in a well bore includes a cementing plug. The cementing plug includes at least one sensor. The system transmits a value measured by the sensor to a surface...
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6581688 |
Method of packing extended reach horizontal wells
The present invention provides a method for efficiently packing proppant in an extended reach, horizontal, open hole annulus. For a given set of fixed parameters, such as the wellbore size, screen...
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6554065 |
Memory gravel pack imaging apparatus and method
The present invention provides apparatus and method for evaluating the integrity of gravel packing. A screen is disposed in an annulus between the wellbore and a production tubing. A tubing, such...
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6497282 |
Method of monitoring the diameter of columns made by injection
The invention relates to a method of monitoring the diameter of columns made in the ground by jet grouting. In the method, a measuring instrument is provided which is constituted by a tubular...
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6454001 |
Method and apparatus for plugging wells
A method and apparatus for plugging a well. The apparatus includes a well barrier which may be connected to a pipe string and lowered into a well to a selected plug location. The barrier is held in...
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6408943 |
Method and apparatus for placing and interrogating downhole sensors
A method and system is shown to passively monitor cement integrity within a wellbore. Different types of sensors (pressure, temperature, resistivity, rock property, formation property etc.) are...
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6401814 |
Method of locating a cementing plug in a subterranean wall
A method is provided which, in an embodiment described herein, permits a location and/or displacement of a cementing plug to be determined during a cementing operation. In this embodiment, one or...
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6302205 |
Method for locating a drill bit when drilling out cementing equipment from a wellbore
A method for locating a drill bit when drilling out cementing equipment from a casing of a wellbore. A first step involves placing in the casing of the wellbore at the time of placing cementing...
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6296057 |
Method of maintaining the integrity of a seal-forming sheath, in particular a well cementing sheath
A method of maintaining the integrity of a sheath, in particular a cementing sheath in a well consists in calculating or estimating variations in well pressure and/or in well temperature and/or in...
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6279392 |
Method and system for distributed well monitoring
A distributed pressure monitoring system is disclosed for monitoring formation pressure along substantial lengths of a casing in a borehole. The monitoring system has a communications line...
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6268406 |
Well cementing methods using compositions containing liquid polymeric additives
Methods of cementing subterranean zones penetrated by a well bores are provided. In accordance with the methods, a cement composition is prepared comprised of a hydraulic cement, sufficient water...
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H001932 |
Wettability and fluid displacement in a well
An inverter fluid that intermixes with a non-aqueous (e.g., oil) external/aqueous internal fluid to cause external/internal inversion is designed. This includes testing a selected inverter fluid...
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6125935 |
Method for monitoring well cementing operations
A method for monitoring a cementing operation is disclosed for predicting whether an effective formation-to-casing seal has been formed across an annulus of a well. In this method a distributed...
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6053245 |
Method for monitoring the setting of well cement
An improved method of monitoring the setting of a settable liquid-containing material is provided. The compressibility of one or more fluids including the settable material is monitored at periodic...
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5829523 |
Primary well cementing methods and apparatus
The present invention provides improved primary well cementing methods and apparatus. The methods basically comprise the steps of releasing a displacement plug into the casing to be cemented and...
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5437329 |
Method and apparatus for activation of furnace slag base cement
The invention provides for metering the pumping rate of BFS/mud mixtures pumped to the cementing head on a rig for sealing off the formation from the casing. Since BFS/mud mixtures require an...
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5425421 |
Method for sealing unwanted fractures in fluid-producing earth formations
Hydraulic fractures which extend between a hydrocarbon fluid producing zone of an earth formation and a water-producing zone are sealed with respect to the water-producing zone by simultaneously...
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5370181 |
Anti gas-migration cementing
A casing or liner in a wellbore penetrating a zone having high formation gas pressure is cemented with a cementitious slurry comprising blast furnace slag. In one embodiment the cementitious slurry...
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5355951 |
Method of evaluating oil or gas well fluid process
A method of evaluating a slurry mixing and placing process, such as a cementing process, for an oil or gas well comprises identifying and measuring specific subprocesses and parameters thereof,...
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5348093 |
Cementing systems for oil wells
A process for determining suitable parameters of temperature and/or pressure to use in a cementing operation in a wellbore to obtain a positive seal of cement in an annulus between a liner and a...
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5339899 |
Drilling fluid removal in primary well cementing
The present invention relates to methods of ensuring the maximum removal of drilling fluid from a well bore including gelled drilling fluid and filter cake deposited on the walls of the well bore...
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5327969 |
Method of preventing gas migration during primary well cementing
The present invention provides a method of preventing gas migration during primary well cementing. The method basically comprises the steps of displacing a cement slurry into the annulus between a...
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5188176 |
Cement slurries for diviated wells
What is disclosed is a method of cementing in which a plurality of cement slurries are employed in a well penetrating subterranean formations and having a deviated section of more than 55 degrees...
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5003502 |
Digital filter for random variable
A digital filter for use with a randomly generated variable, such as in a radioactive densometer, is provided and includes a microprocessor and timing clock for sampling the random variable over a...
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4607694 |
Well plug quality testing
A method is described for testing the quality of cement slurry installed in a borehole to form a plug. The density of the cement, when relatively pure, is compared with the density after the slurry...
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4571993 |
Cementing system including real time display
For use with a cement supply, cement pump and a cement delivery system for cementing a well, an indicator including a real time display system is set forth in the preferred and illustrated...
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