| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 166250140 | Of cementing or plugging technique | 19 |
| 20080196889 | Reverse Circulation Cementing Valve - A method for reverse cementing may include providing a valve having a sliding sleeve, an outer sleeve situated about at least a portion of the sliding sleeve and connected to a casing string, and a spring configured to position the valve in an open position. The method may also include: running the casing string and valve into a well bore while the valve is in an open position; reverse cementing, while the valve is in an open position; and closing the valve after reverse cementing by allowing the valve to contact the well bore. | 08-21-2008 |
| 20090145602 | Cement compositions comprising crystalline organic materials and methods of using same - A method of servicing a wellbore comprising placing a composition comprising cement, water, and a heat sink material into a wellbore, and allowing the composition to set, wherein at least a portion of the heat sink material undergoes a phase transition by absorbing at least a portion of the heat released upon hydration of the cement. A method of completing a wellbore, comprising forming a wellbore in a subterranean formation comprising permafrost, gas hydrates, or both, preparing a cement composition comprising cement, water, and a heat sink material, placing the cement composition into an annulus formed between a casing and the wellbore, and allowing the composition to set, wherein at least a portion of the heat sink material undergoes a phase transition by absorbing at least a portion of the heat released upon hydration of the cement, thereby reducing an amount of heat transferred from the annular cement to the surrounding permafrost and/or gas hydrates. | 06-11-2009 |
| 20090250209 | METHOD AND TOOL FOR EVALUATING FLUID DYNAMIC PROPERTIES OF A CEMENT ANNULUS SURROUNDING A CASING - The permeability of the cement annulus surrounding a casing is measured by locating a tool inside the casing, placing a probe of the tool in hydraulic contact with the cement annulus, measuring the change of pressure in the probe over time, where the change in pressure over time is a function of among other things, the initial probe pressure, the formation pressure, and the permeability, and using the measured change over time to determine an estimated permeability. By drilling into the cement and making additional measurements of the change of pressure in the probe over time, a radial profile of the cement permeability can be generated. | 10-08-2009 |
| 20100212892 | Methods of formulating a cement composition - A method of cementing a wellbore in a subterranean formation comprising formulating a non-Portland base cement composition that may be suitable for long-term zonal isolation, preparing the non-Portland base cement composition, determining a density of the non-Portland base cement composition and adjusting the density as needed to within an optimized density range to form a first optimized cement composition, determining the percentage of tensile strength relative to compressive strength of the cement composition, and placing the optimized cement composition in the wellbore. | 08-26-2010 |
| 20110061863 | FLUID MONITORING AND FLOW CHARACTERIZATION - A wireline logging tool and method for fluid monitoring and flow characterization in individual zones of controlled salinity is disclosed. The tool and method advantageously facilitate zone-specific testing. Sets of packers are used to create hydraulically distinct zones proximate to the tool. Coiled tubing and isolation valves are used to selectively introduce and remove an electrically conductive fluid such as brine to and from a selected zone. Individual sensors are disposed near each zone to make zone-specific measurements while fluid properties are changed, e.g. while salinity is changed to cause salinity fronts in the formation. | 03-17-2011 |
| 20120000650 | METHODS AND APPARATUS FOR IMPROVED CEMENT PLUG PLACEMENT - A method and apparatus for making real-time measurements of downhole properties during cement plug placement. A wired placement conduit ( | 01-05-2012 |
| 20140034301 | Cementing Plug Tracking Using Distributed Strain Sensing - Various systems and methods for cementing plug tracking using distributed strain sensing include a downhole cementing apparatus that includes a distributed strain sensor with an optical cable and a first downhole cementing plug coupled to a fixed point on the optical cable. The apparatus further includes a second downhole cementing plug slidably coupled to the optical cable between the first downhole cementing plug and a sensing end of the optical cable. The second downhole cementing plug causes a detectable feature in a strain profile along the optical cable's length that indicates a position of the second downhole cementing plug. | 02-06-2014 |
| 20140076549 | Systems and Methods for In Situ Monitoring of Cement Slurry Locations and Setting Processes Thereof - Optical analysis systems may be useful in monitoring fluids relating to cementing operations in or near real-time, e.g., for location and/or the status of a cement setting process. For example, method may involve containing a cement slurry within a flow path, the cement slurry having a chemical reaction occurring therein; and optically interacting the cement slurry with an integrated computational element, thereby generating an output signal corresponding to a characteristic of the chemical reaction. | 03-20-2014 |
| 20140076550 | Systems and Methods for Detecting Microannulus Formation and Remediation - Optical analysis systems may be useful in detecting microannulus formation in a wellbore casing and remediating a microannulus. In some instances, a system may include a cement sheath disposed about and in contact with at least a portion of an exterior surface of a casing; and at least one optical computing device arranged coupled to the casing, the at least one optical computing device having at least one integrated computational element configured to optically interact with a material of interest and thereby generate optically interacted light, and at least one detector arranged to receive the optically interacted light and generate an output signal corresponding to a characteristic of the material of interest, the material of interest comprising at least one selected from the group consisting of the cement sheath, a displacement composition disposed between the cement sheath and the exterior surface of the casing, and any combination thereof. | 03-20-2014 |
| 20140202690 | METHOD AND APPARATUS FOR CHARACTERIZING FLUID CHANNELING THROUGH A CEMENT FORMATION INTERFACE OF A SUBTERRANIAN WELLBORE - Disclosed is an apparatus and method for testing a cemented bonding with the formation under wellbore pressure conditions. The apparatus comprises a pressure chamber containing a core of formation material. The cement material to be tested is allowed to set or bond to one side of the core while formation fluids under wellbore pressure conditions are present on the other side. Leakage of formation fluids is measured to evaluate the quality of the interface between the cement and formation materials. | 07-24-2014 |
| 20140262248 | SAND PRODUCTION CONTROL THROUGH THE USE OF MAGNETIC FORCES - A method for preventing the production and formation of loose sand particles during production of a production fluid includes converting in the production zone both a loose sand particle into a magnetized loose sand particle and a cemented sand particle into a magnetized cemented sand particle. The method includes introducing a magnetic source into a wellbore. The method includes operating the magnetic source such that a continuous magnetic field is generated and the continuous repulsive magnetic force is less than the mean cementation strength. The method includes producing the production fluid from the production zone to the wellbore at a production rate. The method includes maintaining the magnetic source and the production rate of the hydrocarbon fluid such that within the distance from the magnetic source the production fluid drag force is less than or equal to the continuous repulsive magnetic force. | 09-18-2014 |
| 20140284052 | Compositions and Methods for Servicing Subterranean Wells - Cement compositions comprising an inorganic cement, water, polymer particles and a water immiscible fluid are useful for reducing the torque necessary to rotate casing during a cementing operation. Such casing movement promotes efficient removal of drilling fluid from the annulus between the casing and the formation or the casing and another casing string. The compositions are particularly useful for cementing operations involving deviated and horizontal wells. | 09-25-2014 |
| 20140318771 | Formation Pressure Sensing System - A method of installing a pressure transducer in a borehole to measure the fluid prepare of a geological formation The pressure transducer is installed into the borehole at a desired, depth, and then the borehole is filled with a cement grout. The fluid connection between the pressure transducer and the formation is opened by pumping a fluid through tubing to displace the cement grout. A process of hydrofracture can be employed to provide a communication path of fluid between the formation, and the pressure transducer surrounded by the fractured grout. In one embodiment of the invention, a pressure transducer is cemented into the borehole along with a check and pressure relief valve. In another embodiment the pressure transducer is installed in the tubing at a subsequent stage. | 10-30-2014 |
| 20140367094 | Method and Apparatus for Testing a Tubular Annular Seal - The present invention provides an apparatus and method for testing a wellbore, and to an apparatus and method to efficiently and effectively test the annular seal of a tubular string positioned within a wellbore. More specifically, the cement seal between a casing string and a wellbore is tested to assure there is no contamination of groundwater or between different geologic formations. An additional aspect of the present invention is to provide a testing assembly comprising a frangible body and a tool body, the tool body providing a passageway to the annular seal when the frangible body is drilled out. In one particular embodiment, the frangible body initially forms an encapsulated bore that aligns with the passageway. | 12-18-2014 |
| 20150034311 | Apparatus And Method Of Concentric Cement Bonding Operations Before And After Cementation - Method and apparatus for deploying at least one repeatable signal to empirically measure cement bonding before and after operating a tool string assembly comprising a selectively arrangeable tool assembly of a downhole drive tool usable for operating a downhole placement tool with shaft and axial displacement member extendable and retractable therefrom to radially deploy and operate at least one conduit and downhole coupling tool for placing cement and at least one inner conduit proximally concentrically within a surrounding bore, wherein said drive coupling tool is further usable for transmitting or receiving, through a conductance well element into a memory tool, to measure cement bonding about said surrounding bore before and after concentrically cleaning and coupling cement to at least one conduit and surrounding bore. | 02-05-2015 |
| 20150315898 | SYSTEMS AND METHODS FOR MONITORING AND VALIDATING CEMENTING OPERATIONS USING CONNECTION FLOW MONITOR (CFM) SYSTEMS - A fluid monitoring system comprises a data acquisition and control interface and one or more fluid measurement devices communicatively coupled to the data acquisition and control interface. The one or more fluid measurement devices are configured to detect amounts of fluids pumped into or exiting the well bore during cementing. The data acquisition and control interface receives a first set of data comprising calculated volumes and/or pressures of a flow of one or more fluids exiting a model well bore over a predetermined period of time based in part on a heat of reaction produced by the curing of a cement composition, and a second set of data comprising volumes and/or pressures of a flow of one or more fluids pumped into or exiting the well bore from the one or more fluid measurement devices. The data acquisition and control interface uses the first and second sets of data received to determine one or more characteristics of the cement composition. | 11-05-2015 |
| 20150361782 | A METHOD OF PRESSURE TESTING A PLUGGED WELL - A method of plugging a well extending into a hydrocarbon bearing formation facilitates temporary or permanent abandonment of the well. The method includes forming two or more plugs within the well, the plugs being formed at longitudinally spaced apart locations whilst providing a fluid communication path from a region above the topmost plug to the or each space between adjacent plugs. This configuration facilitates pressure testing of one or more of the plugs by conducting fluid through said path. | 12-17-2015 |
| 20160102523 | CEMENTING METHOD ALLOWING INITIAL LINER TOP PRESSURE INTEGRITY CONFIRMATION - Cementing takes place after a hanger and seal are set to first insure the pressure integrity of the connection between the string to be cemented and the existing tubular. Cementing top down or bottom up is envisioned with either displaced fluid returning toward the surface in a crossover tool or with the displaced fluid squeezed into the formation. A work string manipulates the crossover for reversing out after cementing. For running in a valve assembly is held open to permit circulation. Work string manipulation allows at least one valve that keeps the cement in the annulus to close and at least one other valve to close that keeps the reverse fluid from leaving the cemented tubular to allow such flow to return to the crossover and out to the surface. Valve release can be done with a pressure responsive sleeve instead of a stinger on the running string. | 04-14-2016 |
| 20160145995 | MANAGED PRESSURE CEMENTING - A method of cementing a tubular string in a wellbore includes: deploying the tubular string into the wellbore; pumping cement slurry into the tubular string; launching a cementing plug after pumping the cement slurry; propelling the cementing plug through the tubular string, thereby pumping the cement slurry through the tubular string and into an annulus formed between the tubular string and the wellbore; and controlling flow of fluid displaced from the wellbore by the cement slurry to control pressure of the annulus. | 05-26-2016 |
