| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 166250070 | Bottom hole pressure | 32 |
| 20080196888 | RAM BOP POSITION SENSOR - A method to determine movement of a wellhead component includes sensing a relative position of the wellhead component with a magnetostrictive sensor over a selected interval of time. The method includes sending a signal from the magnetostrictive sensor to a data acquisition device and recording the relative position of the wellhead component with the data acquisition device with respect to the selected interval of time. Further, the method includes comparing the recorded position of the wellhead component with operations data to determine if the relative position is desirable. | 08-21-2008 |
| 20080271886 | Downhole Gas Compressor - A method for producing gas from a well with low pressure involves running a bottom hole pressure test to graph a P-Q curve. The operator computes a frictional pressure drop due to friction of the gas flowing through the production tubing to the surface. A packer is set above perforations in the well. A screw pump is selected that has a capacity equal to the sum of the frictional pressure drop plus a desired wellhead pressure. The screw pump has a flow rate capacity determined from the P-Q curve. The operator may vary the frequency of a downhole motor to achieve the desired wellhead pressure. | 11-06-2008 |
| 20090084544 | METHOD AND SYSTEM FOR INTERPRETING SWABBING TESTS USING NONLINEAR REGRESSION - A method for increasing production in a reservoir, comprising performing a swabbing test at a depth in a pipe, wherein the pipe is located in a wellbore and wherein a portion of the wellbore is located inside the reservoir, periodically measuring, during the swabbing test, pressure in the bottom portion of the pipe using the pressure gauge to obtain a plurality of pressure measurements, wherein the pressure gauge is affixed to an inner wall of a bottom portion of the pipe, and determining a plurality of flow rates of fluid flowing from the reservoir through perforations in the wellbore into the pipe using a flow rate equation and the plurality of pressure measurements | 04-02-2009 |
| 20090260806 | Bottomhole tool and a method for enhanced oil production and stabilization of wells with high gas-to-oil ratio - A bottomhole tool and a method for optimizing oil production rate from an oil well with high gas-to-oil ratio and stabilizing thereof in case of occurrence of a gas cone or gas skin conditions are disclosed. The resistance of the adjustable multi-stage flow resistor is determined by a position of a telescoping needle, which in turn is defined by a driving means including a motor and a gearbox. The motor is driven via a cable from a surface by a control means adapted to receive information about the bottomhole parameters from local sensors via a sensor cable. Methodology explaining the principles of maintaining well stability is also disclosed. Automatic adjustment of the bottomhole pressure is maintained over a wide range of operating parameters throughout the life of the well to maximize its oil output. | 10-22-2009 |
| 20100006282 | ASSEMBLY FOR PRESSURE CONTROL WHEN DRILLING AND METHOD TO CONTROL PRESSURE WHEN DRILLING IN A FORMATION WITH UNPREDICTABLE HIGH FORMATION PRESSURE - Assembly for pressure control when drilling underground to locate or produce hydrocarbons; whereby the drilling is done by means of a drill string with fluid circulation down through the drill string and up through an annulus between the drill string and the open hole or casing, as the underground in the open hole may comprise one or both of: areas with formation strength which is unable to withstand the pressure from the fluid circulation without fracturing and areas with formation pressure which cannot be combined with each other or the fluid circulation pressure without the fluid unintentionally leaking in or out from the above-mentioned areas. The assembly is distinguished in that onto the drill string a bottomhole assembly is fitted, comprising: a reversible and expandable packer fitted near to the lower end of the drill string to seal the annulus, controllable from the surface a measuring device for measuring the pressure inside the annulus both above and below the packer, with means to simultaneously transfer the data to the surface, a circulation valve fitted above the packer and controllable from the surface in order to open or close off the communication of fluids between the inside of the drill string and the annulus, a control valve (closing valve) fitted below the circulation valve and controllable from the surface, to open and close off the communication of fluids through the drill string, and a connecting sub located above the packer and controllable from the surface for connecting and un-connecting the drill string. | 01-14-2010 |
| 20100018702 | SYSTEM AND METHOD FOR ROBUSTLY AND ACCURATELY OBTAINING A PORE PRESSURE MEASUREMENT OF A SUBSURFACE FORMATION PENETRATED BY A WELLBORE - Embodiments of the present invention relate to systems and methods for accurately determining a pore pressure of a subsurface formation ( | 01-28-2010 |
| 20100089570 | METHOD FOR SIGNALLING A DOWNHOLE DEVICE IN A WELL - A method and apparatus for controlling the operation of a well which is not flowing or in which fluid is pumped or injected into the well utilising a downhole located pressure monitoring device which is operative to monitor a characteristic pressure profile of the well, and to respond and generate a triggering output when a significant deviation to the pressure profile is introduced into the well as a control signal to the monitoring device by comparing two separate pressure profiles within a certain time span, the device only generating a triggering output when the same pressure profile is monitored twice within the time span; and an actuator which is initiated into operation to control any required operation of the well when the monitoring device responds to the control signal and generates the triggering output. | 04-15-2010 |
| 20100200223 | METHOD FOR HEATING A HYDROCARBONS RESERVOIR - A method is proposed for heating a hydrocarbons reservoir, comprising
| 08-12-2010 |
| 20110017448 | ZONAL TESTING WITH THE USE OF COILED TUBING - A method and apparatus for measuring formation properties comprising coiled tubing fitted with a bottom hole assembly, wherein said bottom hole assembly comprises means to measure formation fluid properties, means to transmit said formation fluid properties to a surface monitoring system, means to isolate a section of a wellbore, and means to control the flow of fluid entering said coiled tubing. | 01-27-2011 |
| 20110094733 | Apparatus and Methods for Pulse Testing a Formation - Apparatus and methods for measuring properties of formation material and fluid in a borehole wall. In some embodiments, the apparatus includes a cylinder with a drawdown piston slideably disposed therein, a probe assembly and a passageway configured to provide fluid communication between the probe assembly and the cylinder. The probe assembly has a housing, a piston slideably disposed within the housing, the piston having a throughbore and a pad coupled thereto, and a tubular slideably disposed within the throughbore. The drawdown piston is translatable from a first position toward a second position to draw fluid into the probe assembly, the passageway and the cylinder, and translatable from the second position toward the first position to increase pressure of fluid in the passageway. | 04-28-2011 |
| 20110168389 | Surface Controlled Downhole Shut-In Valve - A tool assembly having a downhole shut-in valve, a packer, and one or more ports. The downhole shut-in valve may be configured to selectively permit flow from a conduit to a target zone of a wellbore. The packer may be configured to isolate the target zone of the wellbore. The ports may be between the conduit and the target zone. The downhole shut-in valve may be configured to close in about 5 seconds or less. | 07-14-2011 |
| 20110168390 | DOWNHOLE ELECTRONICS WITH PRESSURE TRANSFER MEDIUM - Disclosed embodiments include apparatus and methods for transferring a pressure to downhole electronics with a pressure transfer medium. An embodiment of the apparatus includes a body supporting a moveable pressure transfer member, a pressure transfer medium contained by the body and the moveable pressure transfer member, and an electronic component disposed in the pressure transfer medium, wherein the pressure transfer member is moveable to transfer a pressure to the pressure transfer medium and the electronic component. Another embodiment of the apparatus includes a moveable enclosure and a non-conductive material, wherein the non-conductive material isolates an electronic component from a downhole fluid and the moveable enclosure is operable to transfer a hydrostatic pressure to the non-conductive material and the electronic component. An embodiment of a method includes transferring a downhole hydrostatic pressure to an electronic component via a flexible package and a pressure transfer medium. | 07-14-2011 |
| 20120097388 | System And Method For Detecting Pressure In A Subterranean Environment - A sensor is configured to sense pressure in an isolated or subterranean environment. The sensor is configured to act as a capacitor with a capacitance that varies as a function of pressure. The sensor has a robust design with minimal moving parts, and in which any parts that do move do not communicate electrically through direct electrical conduction (e.g., through conductive leads). Instead, moving parts that participate in the performance of sensor as a capacitor receive and dispense electrical charge only through a dielectric fluid (e.g., a gas or liquid within the sensor). This may reduce hysterysis, lag, and/or friction with respect to pressure-dependent capacitor designs in which wiring is connected directly to moving parts. | 04-26-2012 |
| 20120103600 | METHOD OF DETERMINATION OF FLUID INFLUX PROFILE AND NEAR-WELLBORE SPACE PARAMETERS - Method for determination of a fluid influx profile and near-wellbore area parameters comprises measuring a first bottomhole pressure and operating a well at a constant production rate. After changing the production rate a second bottomhole pressure is measured together with a fluid influx temperature for each productive layer. Relative production rates and skin factors of the productive layers are calculated from measured fluid influx temperatures and measured first and second bottomhole pressures. | 05-03-2012 |
| 20120103601 | METHOD OF DETERMINATION OF FLUID INFLUX PROFILE AND NEAR-WELLBORE SPACE PARAMETERS - Method for determination of a fluid influx profile and near-wellbore area parameters comprises measuring a first bottomhole pressure and after operating a well at a constant production rate changing the production rate and measuring a second bottomhole pressure. A wellbore fluid temperature over an upper boundary of a lowest productive layer and wellbore fluid temperatures above and below other productive layers are measured and relative production rates and skin factors of the productive layers are calculated from measured wellbore fluid temperatures and measured first and second bottomhole pressures. | 05-03-2012 |
| 20120145383 | PRESSURE MEASUREMENT IN HIGHLY DEVIATED WELLS - A pressure measurement system for use with a subterranean well can include a chamber positioned in the well, the chamber having an upper portion and a lower portion as positioned in the well, and a device which, in response to gravity acting on the device, selects the upper portion of the chamber for communication with a line extending to a remote location. A method of measuring pressure in a well can include introducing a chamber into the well, then selecting a vertically upper portion of the chamber, and establishing communication between the upper portion of the chamber and a line extending to a remote location. | 06-14-2012 |
| 20120181021 | ROTATIONAL TEST VALVE WITH TENSION RESET - According to one embodiment, a rotationally activated downhole well valve for connection in a tubing string is disclosed that can be repeatedly opened and closed selectively to place the tubing string in communication with the annulus. The valve is moved between the closed position and the open position by rotating the string in the first direction. In another embodiment, the valve is opened and closed by rotating the string in the first direction and is reset in the closed position by lifting and lowering the tubing string. | 07-19-2012 |
| 20120227961 | METHOD FOR AUTOMATIC PRESSURE CONTROL DURING DRILLING INCLUDING CORRECTION FOR DRILL STRING MOVEMENT - A method for determining annulus/wellbore fluid pressure, which is corrected for movement of a pipe string into or out of a wellbore, includes determining an initial annulus fluid pressure in the wellbore. Determining the initial annulus fluid pressure may include measuring a fluid flow rate into the wellbore and/or measuring a fluid pressure in the annulus proximate the surface. A rate of movement of a pipe string into or out of the wellbore is also determined. The initial annulus fluid pressure is adjusted to a corrected annulus fluid pressure by an amount which is a function of the rate of motion of the pipe string, a surface area of the outer wall of the pipe string and a surface area of the inner wall of the wellbore. | 09-13-2012 |
| 20130068451 | Tools and Methods for Use in Completion of a Wellbore - A ported tubular is provided for use in casing a wellbore, to permit selective access to the adjacent formation during completion operations. A system and method for completing a wellbore using the ported tubular are also provided. Ports within the wellbore casing may be opened, isolated, or otherwise accessed to deliver treatment to the formation through the ports, using a tool assembly deployed on tubing or wireline. | 03-21-2013 |
| 20140054029 | PRESSURE MEASUREMENT IN HIGHLY DEVIATED WELLS - A pressure measurement system for use with a subterranean well can include a chamber positioned in the well, the chamber having an upper portion and a lower portion as positioned in the well, and a device which, in response to gravity acting on the device, selects the upper portion of the chamber for communication with a line extending to a remote location. A method of measuring pressure in a well can include introducing a chamber into the well, then selecting a vertically upper portion of the chamber, and establishing communication between the upper portion of the chamber and a line extending to a remote location. | 02-27-2014 |
| 20140174729 | METHOD FOR DETERMINING PARAMETERS OF A BOTTOMHOLE AND A NEAR-BOTTOMHOLE ZONE OF A WELLBORE - Whiles moving a pipe string in a wellbore during tripping operations, pressure and temperature are measured. Based on the measured pressure and temperature, such parameters of a bottomhole and a near-bottomhole zone of the wellbore are calculated as skin factor, permeability, reservoir thickness, bottomhole pressure, and outflow or inflow from/to the zone under consideration. | 06-26-2014 |
| 20140182845 | TIMELINE FROM SLUMBER TO COLLECTION OF RFID TAGS IN A WELL ENVIRONMENT - Sensor assemblies are deployed in a borehole for a well, such as an oil well or other hydrocarbon recovery well. The sensor assemblies are coupled to a casing string (e.g., the exterior of the casing), and may detect RFID tags or other properties of material (e.g., fluids) in an annulus surrounding the casing string. Limited battery power for the sensor assemblies and for assemblies for communicating sensed data may be a concern, and the sensor assemblies and communication assemblies may therefore operate in different modes of varying power consumption. In certain modes, sensing operations are curtailed (or expanded) depending on particular requirements. In one case, sensor operation is expanded during active portions of a cementing operation, and curtailed prior to and thereafter. Different triggering events may cause the sensor assembly to operate in different modes at different sensing frequencies. | 07-03-2014 |
| 20140196893 | Equipment and Methods for Deploying Line in a Wellbore - Many wellbore service operations involve placing a line in the wellbore. The line may be used to transmit power to downhole tools, convey signals from downhole-measurement instruments, or both. A problem associated with such operations involves drag forces experienced by the line as process fluids flow through the well, particularly the interior of a tubular body such as casing. The drag forces may cause the line to fail. Magnetizing the line solves this problem. During deployment, the line will migrate and become attached to the casing. Drag forces are significantly reduced because the line is no longer surrounded by moving fluid. | 07-17-2014 |
| 20140290940 | Systems and Methods for the Evaluation of Passive Pressure Containment Barriers - Systems and methods for the advance, real-time and/or post-event evaluation of inaccessible passive pressure containment barriers using an iterative process. | 10-02-2014 |
| 20140290941 | Sample Capture Prioritization - A method for determining formation fluid sample quality includes analyzing sample capture data to identify distinguishing features indicative of whether a successful sample capture has occurred within a downhole tool. The method further includes prioritizing, based on the analysis, the sample capture data for transmission to a surface system. | 10-02-2014 |
| 20140318768 | PUMP FOR CONTROLLING THE FLOW OF WELL BORE RETURNS - An apparatus and method to control and exert a predetermined force back on the wellbore thereby controlling the hydrostatic force on the formation surrounding the well-bore, the inflow of fluids from the surrounding formation and the drilling circulating medium. The apparatus comprises and the method utilizes a pump having at least one pair of intermeshing and opposite-handed helical screws disposed within a chamber for restricting the flow of well bore returns. The speed of the pump may be varied to selectively restrict the flow of well bore returns from the well bore. | 10-30-2014 |
| 20140367093 | Combined Anti-Rotation Apparatus and Pressure Test Tool - A down-hole tool for pressure testing production tubing within a borehole of a well returning the well to production, includes an anti-rotational device comprising a tubular housing having a first end, a second end, an outer surface, and at least one anti-rotational wing disposed on the outer surface of the tubular housing, radially extendable to engage a radial surface of the borehole to anchor the production tubing thereto; a valve for controlling the flow of down-hole fluids within the production tubing, the valve comprising a first valve member fixedly positioned within the tubular housing of the anti-rotational device and a second valve member positionable between a closed position and an open position; and a reactivation device comprising means for axially engaging an axial surface of the borehole, the reactivation device affixed to the first end of the tubular housing, wherein the production tubing may be pressure tested when the valve is in the closed position. | 12-18-2014 |
| 20160003003 | TOOLS AND METHODS FOR USE IN COMPLETION OF A WELLBORE - A ported tubular is provided for use in casing a wellbore, to permit selective access to the adjacent formation during completion operations. A system and method for completing a wellbore using the ported tubular are also provided. Ports within the wellbore casing may be opened, isolated, or otherwise accessed to deliver treatment to the formation through the ports, using a tool assembly deployed on tubing or wireline. | 01-07-2016 |
| 20160061003 | Optimum Flow Control Valve Setting System And Procedure - A technique facilitates selection of optimum flow control valve settings to improve a desired objective function in a multizone well having zonal isolation. A network of flow control valves is provided in a completion network disposed along isolated well zones of at least one lateral bore of the multizone well. Data is acquired from downhole in the multizone well and processed on processor system modules which may be used in selected combinations. Examples of such modules comprise completion network modules, deconvolution modules, optimization modules, and/or inflow-outflow modules. The modules are designed to process the collected data in a manner which facilitates adjustment of the flow control valve settings in the network of flow control valves to improve the desired objective function. | 03-03-2016 |
| 20160177693 | COMPOSITIONS AND METHODS OF IMPROVING HYDRAULIC FRACTURE NETWORK | 06-23-2016 |
| 20160186041 | CONFORMANCE CONTROL IN ENHANCED OIL RECOVERY - The present invention relates to an improved method of enhancing oil recovery by use of conformance control. More particularly, the method of conformance control involves the provision of a plugging material which is designed to be formed within an area of high-permeability in preference to an area of low permeability in order that subsequent water, gas or chemical flooding can enhance oil recovery from the area/region of low permeability. | 06-30-2016 |
| 20170234121 | SYSTEMS AND METHODS FOR TRANSIENT-PRESSURE TESTING OF WATER INJECTION WELLS TO DETERMINE RESERVOIR DAMAGES | 08-17-2017 |
