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| Number | Title | Issue Date |
| 8162065 | System and method for controlling liquid removal operations in a gas-producing well A system for operating downhole equipment in a well includes a drive shaft extending from a surface of the well to a downhole location. A motor is positioned at the surface and is operably connected to the drive shaft to selectively rotate the drive shaft. A lift sy... | 04/24/2012 |
| 8033337 | Plugging a mined-through well A system and method of plugging a well bore includes intersecting a portion of a well with a subterranean cavern. A portion of the well may be isolated to prevent accumulation of reservoir fluids in the subterranean cavern by, for example, inserting a packer in the ... | 10/11/2011 |
| 7987913 | Electrical submersible pump with equally loaded thrust bearings and method of pumping subterranean fluid A rotary pump having thrust bearings includes a system for equalizing the loading on the thrust bearings. The thrust bearings are each supported on pistons that are in fluid communication with a hydraulic circuit. The hydraulic circuit has substantially the same pre... | 08/02/2011 |
| 7971649 | Flow control system having an isolation device for preventing gas interference during downhole liquid removal operations A flow control system includes a pump positioned in a wellbore to remove liquid from the wellbore. An isolation device is positioned in communication with the wellbore to substantially prevent gas flow at the pump during removal of the liquid. ... | 07/05/2011 |
| 7874368 | Insertable progressive cavity pump systems and methods of pumping a fluid with same A progressive cavity pump system. In an embodiment, the system comprises a tubing string disposed within a borehole. The tubing string including a seating nipple disposed at a predetermined depth in the tubing string. In addition, the system comprises a stator posit... | 01/25/2011 |
| RE42030 | Critical velocity reduction in a gas well Disclosed herein is a system for enhancing the recovery of gas in a perforated interval of a gas well. The system features a tubing string having a dead string attached for reducing the flow area of the annulus in the perforated interval, thereby reducing the critic... | 01/18/2011 |
| 7857060 | System, method and apparatus for concentric tubing deployed, artificial lift allowing gas venting from below packers An artificial lift deployed on concentric tubing allows gas to be vented from below packers in a well. A central flow path is used for the fluid production from the artificial lift system, while an outer concentric tubing allows for the venting and production of gas... | 12/28/2010 |
| 7789158 | Flow control system having a downhole check valve selectively operable from a surface of a well A flow control system includes a pump positioned in a well to remove liquid from the well. A check valve is positioned in the well and includes an open position and a closed position. The check valve in the open position allows gas from a producing formation of the ... | 09/07/2010 |
| 7789157 | System and method for controlling liquid removal operations in a gas-producing well A system for operating downhole equipment in a well includes a drive shaft extending from a surface of the well to a downhole location. A motor is positioned at the surface and is operably connected to the drive shaft to selectively rotate the drive shaft. A lift sy... | 09/07/2010 |
| 7784548 | Smart compressed chamber well optimization system A system for extracting a gas and a liquid from a well broadly includes tubing strings that collect well liquid and a gas lift system that removes the collected liquid. A standing valve connects the strings and permits liquid to enter the strings from the subsurface... | 08/31/2010 |
| 7762341 | 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 t... | 07/27/2010 |
| 7753127 | 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... | 07/13/2010 |
| 7753128 | Method and system for well production Disclosed herein are methods for preparing a wellbore for production or injection. The methods may include the steps of positioning a completion longer than 300m comprising an inflow control device (ICD) having radial flow paths in the wellbore adjacent to a filterc... | 07/13/2010 |
| 7610964 | Positive displacement pump A submersible pumping system for use downhole that includes a housing containing an expandable fluid, that when expanded pushes a piston that in turn pumps wellbore fluid to the surface. The expandable fluid can be a silicon based heat transfer fluid with a coeffici... | 11/03/2009 |
| 7516797 | Method for operating a well jet device in the conditions of a formation hydraulic fracturing A well jet device operating method comprises running a jet pump into a well, releasing a packer above a productive formation, pumping hydraulic fracturing fluid though a blocking insert in the pump channel, extracting the blocking insert, running flexible pipe into ... | 04/14/2009 |
| 7516796 | Piston pump assembly with flexible riser pipe A pump for pumping liquid from a well having a continuous flexible riser pipe that does not have a coil memory and a flexible actuating rod disposed within the flexible riser pipe. A piston valve unit is disposed at one end of the riser pipe and drivably connected t... | 04/14/2009 |
| 7428929 | Method and apparatus for lifting liquids from gas wells A downhole apparatus and method for maintaining or reducing the level of liquids at the bottom of a gas producing well is described including a constriction or throat section, such as a Venturi, in which a production gas flow from the well is used to generate a low ... | 09/30/2008 |
| 7409998 | Critical velocity reduction in a gas well Disclosed herein is a system for enhancing the recovery of gas in a perforated interval of a gas well. The system features a tubing string having a dead string attached for reducing the flow area of the annulus in the perforated interval, thereby reducing the critic... | 08/12/2008 |
| 7370697 | Thrust section wear preventor A thrust section for use above a motor preferably includes a housing, a thrust shaft, a thrust runner connected to the thrust shaft, a thrust bearing connected to the housing, and a motor lead guard. The motor is preferably positioned above a pump assembly. The thru... | 05/13/2008 |
| 7363983 | ESP/gas lift back-up A well production system has a string of production tubing with a junction having two legs. A first leg is sealed to the casing by a packer located above well perforations. A submersible pump assembly is secured to a second leg, the pump having an intake in the tubi... | 04/29/2008 |
| 7360595 | Method and system for underground treatment of materials A method for underground treatment of subsurface materials comprises providing an injection pattern and a recovery pattern, the injection pattern and the recovery pattern located proximate to a subsurface treatment zone and at least one of the injection pattern and ... | 04/22/2008 |
| 7353877 | Accessing subterranean resources by formation collapse A subterranean zone can be accessed from the surface by forming a well bore extending from the surface into the subterranean zone. A tubing string is provided within the well bore, and an underreamer passed over the tubing string to a specified location within the s... | 04/08/2008 |
| 7350581 | Vapor recovery system A vapor recovery apparatus for oil and gas well production that is used in combination with a liquid separator, a sales line and a holding tank includes a compressor, which is drivingly linked to an engine. A first conduit extends from fluid communication with the h... | 04/01/2008 |
| 7350596 | Methods and apparatus for expanding the diameter of a borehole A borehole reamer which may be deployed to a desired depth in an existing uncased borehole or below existing casing and used to substantially expand the diameter of the borehole. The diameter may be expanded by an amount that ranges from a fraction to a multiple of ... | 04/01/2008 |
| 7322410 | Controllable production well packer An apparatus and method for operating an electrically powered device in a packer using the piping structure of the well as an electrical conductor for providing power and/or communications. The electrically powered device may comprise an electrically controllable va... | 01/29/2008 |
| 7320365 | Methods for increasing production from a wellbore The present invention generally relates to a method for recovering productivity of an existing well. First, an assembly is inserted into a wellbore, the assembly includes a tubular member for transporting drilling fluid downhole and an under-reamer disposed at the e... | 01/22/2008 |
| 7318489 | Hydraulic motor arrangement and method of operating a hydraulic motor A hydraulic motor for use in subterranean drilling operations in which a drive fluid within a first reservoir is forced through the motor by a high pressure working fluid, such as drilling mud, the drive fluid entering a second reservoir upon exiting the motor. Upon... | 01/15/2008 |
| 7314080 | Slidable sleeve plunger An improved plunger lift mechanism comprises an internal hollow body having bypass orifices that, when exposed, allow fluid to pass through during plunger descent in a downhole tube to the bottom of a production well. A slidable sleeve slides along the hollow body t... | 01/01/2008 |
| 7314089 | Method of wellbore pumping apparatus with improved temperature performance and method of use Oil is recovered from a borehole using a pump having limited high temperature breakdown resistance. The pump is located in a borehole having a cooling zone, in which the temperature of the well fluid is reduced to, or below, the temperature at which the temperature ... | 01/01/2008 |
| 7311144 | Apparatus and method for increasing well production using surfactant injection An apparatus and method for injecting surfactant into a well for coal bed methane (CBM) recovery, tight sand gas extraction, and other gas extraction techniques provides for the mixing of surfactant and water near the downhole end of the well, maximizing water remov... | 12/25/2007 |
| 7293608 | Liquid well stimulator A stimulator device and associated method is provided for a subterranean liquid well comprising a pump adapted for selectively evacuating vapor from the borehole of the well above a liquid column in the borehole to opposingly impinge the liquid column to hydrostatic... | 11/13/2007 |
| 7275599 | Positive pressure gas jacket for a natural gas pipeline The present invention provides a method and apparatus whereby the intake pipeline running between the production chamber of a natural gas well and the suction inlet of an associated wellhead compressor is completely enclosed, in airtight fashion, within a jacket of ... | 10/02/2007 |
| 7275590 | Submersible pump A submersible pump for attachment to the lower end of a well pipe discharge tube for insertion in liquid includes a stationary collecting tube for collecting the liquid and an upward and downward reciprocating pumping tube within the collecting tube for pushing and ... | 10/02/2007 |
| 7275592 | Oil well pump apparatus An oil well pumping apparatus for pumping oil from a well to a wellhead provides a tool body that is sized and shaped to be lowered into the production tubing string of the oil well. A working fluid is provided that can be pumped into the production tubing. A prime ... | 10/02/2007 |
| 7273106 | Surface flow controlled valve and screen An adjustable well screen assembly having a pipe which is connectable to a production pipe, wherein the pipe comprises a hole extending from the ID of the pipe to the OD of the pipe; a screen connected to the pipe adjacent the hole of the pipe; a valve connected to ... | 09/25/2007 |
| 7264052 | Methods and compositions for consolidating proppant in fractures Improved methods and compositions for consolidating proppant in subterranean fractures are provided. In certain embodiments, the hardenable resin compositions may be especially suited for consolidating proppant in subterranean fractures having temperatures above abo... | 09/04/2007 |
| 7259688 | Wireless reservoir production control A reservoir production control system includes a plurality of wells for producing a reservoir linked to a central computer over a downhole communication network and a surface communication network. Both the downhole and the surface communication networks are wireles... | 08/21/2007 |
| 7252148 | Plunger actuated pumping system Methods and apparatus for pumping fluids from a well utilizing a submersible pumping system. In one embodiment, the pump comprises a pump body operable to be disposed within tubing within a well. The pump body encloses a pump chamber having an inlet and an outlet. T... | 08/07/2007 |
| 7234520 | Well jet device for testing and studying formations and the operating method thereof The invention relates to jet devices and the operating methods thereof and can be used in order to produce and intensify the oil inflow from a well. The inventive device comprises a jet pump arranged on a tubing string in the well with a casing string. An active noz... | 06/26/2007 |
| 7213787 | Valves for annular conduits including aircraft fuel conduits and associated systems and methods Valves for annular conduits and associated systems and methods are disclosed. A fluid transmission system in accordance with one embodiment of the invention includes a first conduit having a first wall aligned with a flow direction in the first conduit and a second ... | 05/08/2007 |
