Class / Patent application number | Description | Number of patent applications / Date published |
166370000 | Including varying downhole pressure | 26 |
20080296026 | Wellbore Collection System - A system, apparatus and method are useful for lifting reservoir fluid in a gas-producing wellbore through the application of a differential between pressure of the gas in the wellbore's gas-production conduit a lower end of which is disposed in reservoir fluid accumulated at a bottom of the wellbore and pressure of the wellbore annulus. The apparatus comprises a collection module disposed in the gas-producing wellbore for collecting by condensation reservoir fluid being lifted as vapor with produced gas in a gas-production conduit disposed in the wellbore, and one or more lift modules for applying the pressure differential to lift the reservoir fluid collected by condensation, and optionally reservoir fluid accumulated at the bottom of the wellbore, within the wellbore. | 12-04-2008 |
20090000790 | Short stroke piston pump - A short stroke piston pump for recovering oil and/or water from marginal stripper wells, tar sands and coal beds includes a motor connected to one end of a drive rod, the motor capable of moving the drive rod in a generally up and down direction. A piston is connected to another end of the drive rod, the piston and drive rod are disposed in a riser pipe, the piston is adapted to transport fluid up the riser pipe as the piston moves up and down in the riser pipe. Additionally, a controller is communicatively connected to the motor, the controller changing speed and direction of the motor in response to a location or status of the drive rod within the riser pipe | 01-01-2009 |
20090008101 | Method of Producing a Low Pressure Well - A method of producing natural gas from a well has a mode that removes liquid collected in the well by injecting gas. The well has a string of tubing with a valve at its lower end that is submerged in the liquid produced by the well. An injection tube extends into the tubing. With the valve open, natural gas from the well flows up the tubing annulus and out the well to a gas pipeline and liquid flows into the tubing as well as into the injection tube. Periodically, an injection gas is injected down the injection tube with the valve closed to prevent the injection gas from flowing into the tubing annulus. This causes liquid collected in the tubing to be pushed to the surface and out of the well. | 01-08-2009 |
20090032264 | SUBSEA PUMPING SYSTEM - A pumping system is disclosed for producing hydrocarbons from a subsea production well with at least one electrical submersible pumping (ESP) hydraulically connected to at least one multiphase pump to boost production fluid flow. | 02-05-2009 |
20090283275 | Flow Control Device Utilizing a Reactive Media - An apparatus for controlling a flow of a fluid into a wellbore tubular includes a flow path associated with a production control device; an occlusion member positioned along the flow path that selectively occludes the flow path, and a reactive media disposed along the flow path that change a pressure differential across at least a portion of the flow path by interacting with a selected fluid. The reactive media may be a water swellable material or an oil swellable material. The reactive media may be selected or formulated to change a parameter related to the flow path. Illustrative parameters include, but are not limited to, (i) permeability, (ii) tortuosity, (iii) turbulence, (iv) viscosity, and (v) cross-sectional flow area. | 11-19-2009 |
20090321081 | Controlled Pressure Equalization of Atmospheric Chambers - Methods and devices for equalizing an atmospheric chamber within a well tool in a controlled manner following the operation of setting the well tool. A packer setting tool is described having a setting mechanism with an atmospheric chamber and an equalization assembly to permit the pressure differential between the atmospheric chamber and the surrounding annulus to be substantially equalized. | 12-31-2009 |
20100051287 | Depressurization system of annuli between casings in producing wells - A depressurization system for the annular spaces ( | 03-04-2010 |
20100132953 | BARRIER FOR INSTRUMENTATION PIPING - A well head barrier assembly ( | 06-03-2010 |
20100252271 | Total in place hydrocarbon recovery by isolated liquid & gas production through expanded volumetric wellbore exposure + - Higher volumetric hydrocarbon exposed original or restored by miscible gas injection, solution gas saturated oil is recovered through enlarged expandable liner, sand screened wellbores by controlled wellbore to formation pressure maintained above recovering oils critical bubble point. Exclusively hydrocarbon formation liquids are differential pressure forced through invention's centralizer held larger O.D. Liquid Displacer into the production tubing, while maintaining gas volume, pressure, and solution gas saturation in the formation, for higher volume flow for total in place oil recovery. Injected downstructure waterdrive pressure WDP into oil or gas formations augments oil and/or gas production and recovery. | 10-07-2010 |
20100288507 | METHOD AND APPARATUS FOR CONTROLLING BOTTOM HOLE PRESSURE IN A SUBTERRANEAN FORMATION DURING RIG PUMP OPERATION - A method for maintaining pressure in a wellbore during drilling operations is disclosed. The method includes the steps of providing fluid from a reservoir through a drill string, circulating the fluid from the drill string to an annulus between the drill string and the wellbore, isolating pressure in the annulus, measuring pressure in the annulus, calculating a set point backpressure, applying back pressure to the annulus based on the set point back pressure, diverting fluid from the annulus to a controllable choke, controllably bleeding off pressurized fluid from the annulus, separating solids from the fluid, and directing the fluid back to the reservoir. An apparatus for maintaining pressure in a wellbore during drilling operations that includes an adjustable choke for controllably bleeding off pressurized fluid from the wellbore annulus, a backpressure pump for applying a calculated set point backpressure, and a processor for controlling the adjustable choke and backpressure pump is also disclosed. | 11-18-2010 |
20110139464 | Surface Gas Evaluation During Controlled Pressure Drilling - A system and method have a choke in fluid communication with a rotating control device. The choke controls flow of drilling mud from the rotating control device to a gas separator during a controlled pressure drilling operation, such as managed pressure drilling (MPD) or underbalanced drilling (UBD). A probe is in fluid communication with the drilling mud between the choke and the gas separator. During operations, the probe evaluates gas in the drilling mud from the well passing from the choke to the gas separator. | 06-16-2011 |
20110214879 | TACTILE PRESSURE SENSING DEVICES AND METHODS FOR USING SAME - A device and related method for conducting a wellbore operation controls a tool by using at least one pressure estimated at a contact between a reaction surface and a contact face associated with the tool. The device may include a contact face and a sensor associated with the contact face. The sensor may be configured to estimate a pressure applied to the contact face. | 09-08-2011 |
20110232914 | METHOD FOR MAINTAINING WELLBORE PRESSURE - A method for maintaining wellbore pressure includes reducing flow rate of a drilling fluid pump fluidly connected to a drill pipe in the wellbore. Flow out of the well is enabled into a first auxiliary line associated with a drilling riser. A seal around the drill pipe is closed. Fluid is pumped down a second auxiliary line at a rate selected to maintain a specific pressure in the wellbore. Drilling fluid flow through the drill pipe is stopped. | 09-29-2011 |
20120085547 | PROCESSES AND SYSTEMS FOR TREATING OIL AND GAS WELLS - Systems and processes are provided for removing fluid from a subterranean well and enhancing the production of oil and/or gas are herein disclosed. In one embodiment, the system includes an injection conduit, an injection valve, a relief valve, a container, a container valve, a return conduit valve, and a return conduit, all arranged within a subterranean well for removing at least one fluid from the well. The removal of at least one fluid from the well is controlled by the flow of gas into the injection conduit. | 04-12-2012 |
20120199362 | METHODS OF MAINTAINING SUFFICIENT HYDROSTATIC PRESSURE IN MULTIPLE INTERVALS OF A WELLBORE IN A SOFT FORMATION - According to an embodiment, a method of maintaining a hydrostatic pressure exerted on a wall of a wellbore in at least a first interval and a second interval of the wellbore, comprises the steps of: flowing a liquid through at least a first pressure regulator and a second pressure regulator, wherein the first pressure regulator is located in the first interval of the wellbore, wherein the second pressure regulator is located in the second interval of the wellbore, and wherein each of the first and second pressure regulators regulates the amount of pressure exerted by the liquid on the wall of the wellbore; and maintaining the amount of pressure for a specific period of time. According to another embodiment, a method of maintaining a hydrostatic pressure in multiple intervals of a soft subterranean formation, comprises the steps of: using a pressure regulator to maintain an amount of pressure exerted by a liquid on the face of the subterranean formation in each of the multiple intervals, wherein the step of using comprises maintaining liquid communication with each of the multiple intervals. According to certain embodiments, the wellbore is part of a soft subterranean formation. | 08-09-2012 |
20120211238 | GAS PRODUCTION USING A PUMP AND DIP TUBE - A pressure control system varies a parameter of a gas flowing out of the well to artificially generate a pressure value at a fluid mover. The fluid mover receives fluid from a conduit such as a dip tube positioned in the well. The system may also include a flow control device controlling a gas flow out of the well and a controller controlling the flow control device using information relating to at least one wellbore parameter. | 08-23-2012 |
20120318523 | CONTROL VALVE ASSEMBLY - In a system for optimizing natural gas production in response to real-time variations in wellbore parameters, a PLC or other wellsite intelligence technology is used to monitor liquid and gas production from the wellbore under friction-loaded conditions. Using baseline production data obtained during production tests, the PLC determines and initiates the appropriate operating mode for the wellbore to optimize a selected production criterion to suit measured wellbore parameters. The operating mode either a continuous clean-out mode, in which gas is continuously injected into the wellbore to control liquid loading, or an intermittent clean-out, in which liquid loading is regulated by intermittent gas injection. In preferred embodiments, the system uses bladder-type control valves having upstream and downstream solenoids, to control production tubing flow rate within a range between upper and lower set points. | 12-20-2012 |
20130062070 | System and Method of Liquefying a Heavy Oil Formation for Enhanced Hydrocarbon Production - A system and method of liquefying a heavy oil formation to enhance oil production in a well, by inducing shear stress reversal within the formation by a plurality of expanding/contracting bladders in contact with the formation. The induced liquefaction enables formation materials and fluids to flow into the well and thus initiate and propagate the CHOPS (Cold Heavy Oil Production System) process, and thereby enhancing the hydrocarbon production of the well. | 03-14-2013 |
20130105172 | PRESSURE CYCLE INDEPENDENT INDEXER AND METHODS | 05-02-2013 |
20130105173 | DISCHARGE PRESSURE ACTUATED PUMP | 05-02-2013 |
20130277063 | SYSTEM AND METHOD OF IMPROVED FLUID PRODUCTION FROM GASEOUS WELLS - A system and method are provided for improving hydrocarbon production from gaseous wells, and in particular improving hydrocarbon production using pumping systems employing artificial lifts. The pumping system of the well is controlled so as to cyclically decrease and increase gas pressure in the casing annulus, thus cyclically decreasing PBHP in response to the decrease in the casing annulus pressure and permitting the PBHP to increase in response to the increase in casing annulus pressure. Production of fluid from the reservoir is therefore increased during the cyclical decrease in casing annulus pressure, and production of fluid from the downhole pump is increased during the cyclical increase in casing annulus pressure. In addition, gas interference due to production of foam in the casing surrounding a downhole pump can be mitigated by forcing liquid from the foam during the period of increased casing annulus pressure. | 10-24-2013 |
20140116718 | SINGLE PACKER WITH A SEALING LAYER SHAPE ENHANCED FOR FLUID PERFORMANCE - A system and/or a method collects formation fluids using a single packer with expansion rings and/or an irregular sealing layer. The packer may have an expansion ring extending around an outer circumference. The expansion ring may seal a portion of a wellbore to sample fluid from a formation. An irregular sealing layer may facilitate leaking between drains of the packer. The irregular sealing layer may have grooves through which fluid may flow. The irregular sealing layer may be composed of fibers and/or plastic. | 05-01-2014 |
20140246205 | Apparatus for Downhole Water Production Control in an Oil Well - This invention relates to controlling production fluids downhole in an oil well. More specifically, this invention relates to control of water and pressure downhole. Provided are apparatus for controlling production fluids and pressures and methods of using the apparatus to control production fluids and pressures. | 09-04-2014 |
20150034328 | GROUNDWATER REMEDIATION APPARATUS AND METHOD - A well pipe provides for air sparging and soil vapor extraction for groundwater remediation at a single point of entry. An elongated well pipe is provided with a plurality of openings at an upper section and a lower section of the pipe and a packer member for separating the two sections. A conduit for delivering compressed air passes through the packer member into the lower section of the well tube for providing air sparging below the water table level in the ground and a vacuum source is connected to an upper end of the well pipe for drawing vapors from the vadose region in the ground into the pipe through the openings in the upper section of the well tube for transport on to a remediation destination. The conduit is adapted for delivery of remedial enhancing amendments into the surrounding ground through the lower section of the well pipe to further treat the contamination below the ground surface. | 02-05-2015 |
20150060083 | Systems and Methods for Artificial Lift Via a Downhole Piezoelectric Pump - Systems and methods for artificial lift via a downhole piezoelectric pump are disclosed herein. The methods include methods of removing a wellbore liquid from a wellbore that extends within a subterranean formation and/or methods of locating the downhole piezoelectric pump within the wellbore. The systems include hydrocarbon wells that include the wellbore, a casing, the downhole piezoelectric pump, and a liquid discharge conduit and the systems may be utilized with and/or configured to perform the methods. | 03-05-2015 |
20150068761 | Subterranean Storage Assemblies and Methods for Storing Fluids in a Subterranean Room - Subterranean hydrocarbon recovery systems are provided with the systems including a plurality of conduit sections in fluid communication with at least some of which being aligned in parallel along at least one axis of each section. The recovery systems can also include a well head within a subterranean space with at least one of the sections being in fluid communication with the well head. Subterranean hydrocarbons systems are also provided that can include a plurality of conduit sections arranged in rows and columns. | 03-12-2015 |