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| Number | Title | Issue Date |
| 7225879 | Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell An assembly and methods for constructing a MONOWELL includes a monodiameter casing disposed in a monodiameter wellbore having diametric efficiency with a monobore production delivery system disposed within the monodiameter casing. An assembly for constructing a mono... | 06/05/2007 |
| 7219725 | Instrumented plunger for an oil or gas well A plunger for use in a plunger lift system of an oil or natural gas well includes one or more sensor assemblies, each including one or more sensors for measuring various physical and operational conditions during the operation of the well. The data acquired from the... | 05/22/2007 |
| 7185706 | Arrangement for and method of restricting the inflow of formation water to a well An arrangement for restricting the inflow of formation water from an underground formation to a hydrocarbon producing well, where, between the underground formation and a production tubing (38) located in the well, there is disposed at least one flow chamber ... | 03/06/2007 |
| 7174957 | Magnetic bailer A bailer is configured to remove particulate solids from fluid passing through the bailer. The bailer preferably includes a housing that includes an intake and an outlet to permit the flow if well fluids through the housing. The bailer also includes a magnetic plate... | 02/13/2007 |
| 7150325 | ROV retrievable sea floor pump A subsea pumping assembly locates on a seafloor for pumping well fluid from subsea wells to the level. The pumping assembly has a tubular outer housing that is at least partially embedded in the seafloor. A tubular primary housing locates in the outer housing and ha... | 12/19/2006 |
| 7124829 | Tubular expansion fluid production assembly and method An expansion-set fluid production assembly transfers well fluids from a casing string 12 to a production tubing string 112. A tubular anchor 72 and tubular expander 70 may be positioned downhole on a running tool at a desired depth along ... | 10/24/2006 |
| 7124819 | Downhole fluid pumping apparatus and method A downhole fluid pump including a pump chamber, and a piston disposed in the pump chamber so that the piston will move in one selected from a charge stroke and a discharge stroke when the piston is exposed to a differential pressure. The downhole fluid pump may form... | 10/24/2006 |
| 7100685 | Mono-diameter wellbore casing A mono-diameter wellbore casing. The mono-diameter wellbore casing is formed by plastically deforming and radially expanding a first tubular member within a wellbore. A second tubular member is then plastically deformed and radially expanded in overlapping relation ... | 09/05/2006 |
| 7080686 | Devices and methods for extraction, transportation and/or release of material Provided are methods and apparatuses for extracting, transporting and/or releasing various kinds of liquid and semi-liquid materials. The materials may have very high viscosity and may include solids. Generally speaking, the apparatus includes a container, a gateway... | 07/25/2006 |
| 7055606 | System and method for treating wells A system and method is provided for utilizing both a wellbore completion and a formation treatment system. The formation treatment system comprises a bypass that directs well treatment fluid around the wellbore completion. The bypass protects the wellbore completion... | 06/06/2006 |
| 7025134 | Surface pulse system for injection wells The present invention relates to petroleum recovery operations, and more particularly, to the use of pulse technology to enhance the effectiveness of waterflooding operations. The systems of the present invention generally comprise an injection means for continually... | 04/11/2006 |
| 7004252 | Multiple zone testing system A method and system for drillstem testing multiple zones in a well with a single testing trip into the well. A multiple zone tester is landed in the lower completion to form separate controllable flow paths from each of the zones. The multiple zone testing system fa... | 02/28/2006 |
| 6997264 | Method of jointing and running expandable tubulars A connector arrangement used for connecting a first tubular to a second tubular. The first tubular member has at least one circumferential ring profile, and the second tubular member has a corresponding number of matching circumferential ring profiles. When the ring... | 02/14/2006 |
| 6986650 | Fluid pumping apparatus A method and apparatus suitable for coupling seismic or other downhole sensors to a borehole wall in high temperature and pressure environments. In one embodiment, one or more metal bellows mounted to a sensor module are inflated to clamp the sensor module within th... | 01/17/2006 |
| 6973971 | Down hole well cleaning apparatus An apparatus and a method for cleaning the open perforations in a well and for bailing a well. The apparatus has a tubular conduit with at least one seal attached to it that forms a seal between the well casing and the exterior of the conduit. The seal is held in pl... | 12/13/2005 |
| 6907797 | Method and apparatus for supercharging downhole sample tanks A tank contains both Zeolite and a hydrate in a gas chamber formed beneath a piston in the sample tank. Out of safety considerations, we avoid using source cylinders of nitrogen whose pressures exceed 4000 psi. Thus, the gas chamber of the sample tank is initially p... | 06/21/2005 |
| 6857472 | Well pump device A well pump device, especially for use in connection with the recovery of hydrocarbons, wherein the pump is carried to a predetermined position within a well pipe. The pump is provided with an external seal which is arranged to prevent fluid from flowing from the pr... | 02/22/2005 |
| 6830441 | Valve for downhole pump A downhole pump having a barrel with a reciprocating plunger therein has at least one valve. The valve has a cage, a seat and a ball. The cage has a passageway extending between two ends, with the passage including a ball chamber. The ball chamber is between a perfo... | 12/14/2004 |
| 6810961 | Fluid well pumping system A fluid well pumping system includes at least one stage for removing fluid from a well. The at least one stage includes a product line assembly adapted for positioning in the well casing as a unit. The product line assembly includes a first product tube and first an... | 11/02/2004 |
| 6755252 | Downhole surge pressure reduction and filtering apparatus The present invention provides a downhole cementing apparatus run into a borehole on a tubular. The apparatus is constructed on the pipe in such a way that pressure surge during run-in is reduced by allowing fluid to enter the pipe and utilize the fluid pathway of t... | 06/29/2004 |
| 6352109 | Method and apparatus for gas lift system for oil and gas wells An intermittent gas lift well pumping system containing an accumulator, a gas line, a liquid discharge line, and a battery operated controller. By using one or more constrictions in the gas line and acoustical techniques, accurate liquid level is determin... | 03/05/2002 |
| 6276452 | Apparatus for removal of milling debris An apparatus and method for drawing small milling debris into a combination milling and debris retrieval tool, during the performance of the milling operation. A milling tool has a fluid intake port near its lower end, where debris-laden fluid is drawn in... | 08/21/2001 |
| 6158512 | Method and apparatus for the removal of sand in an underwater well A sand removing apparatus which is intended to be used in the lower area of underwater wells and is suspended from the end of a pipe string, includes a container having a closeable inlet for allowing a flow of liquid accompanied by sand thereinto. The con... | 12/12/2000 |
| 5549157 | Electronic counter with pump-mounted sensor for cycle indication A counter apparatus for counting the cycling of fluid flow in an automatic pneumatic pump. A magnet inside the pump repetitively moves along a fixed path in response to the pump cycling. A magnetic sensor for detecting magnetic flux is mounted on the pump... | 08/27/1996 |
| 5501580 | Progressive cavity pump with flexible coupling A progressive cavity pump is located in a well and driven by a downhole electrical motor. A connector locates between the drive shaft of the motor and the rotor of the pump. The connector includes a connector shaft which has a lower end restrained on a lo... | 03/26/1996 |
| 5490561 | Purge water management system A purge water management system for effectively eliminating the production of purge water when obtaining a groundwater sample from a monitoring well. In its preferred embodiment, the purge water management system comprises an expandable container, a trans... | 02/13/1996 |
| 5358037 | Float operated pneumatic pump A float operated pneumatic pump has an outer pump body forming an outer chamber and a dip tube forming an inner chamber therein. The inner chamber of the dip tube is in communication with the outer chamber of the pump body through a back flow discharge ch... | 10/25/1994 |
| 5351753 | Leak containment system for a stuffing box A containment device is provided that includes a bottom tray (20) that is of cylindrical shape having a lower surface and one open end. The lower surface has a hole (26) disposed therethrough which is operable to be disposed about a flange on a wellhead w... | 10/04/1994 |
| 5330004 | Well treatment method and apparatus A method of, and apparatus for, treating a well using a tool string is disclosed. The method includes the steps of supplying a predetermined amount of treatment fluid to the well; pumping fluid from the well and holding the fluid in the tool string; and r... | 07/19/1994 |
| 5322119 | Submersible well probe sleeve A submersible well probe sleeve made of a cylindrical tube attached to a submersible pump. The cylindrical tube has a number of slots exposing access to a protective pouch. Inside the protective pouch a fluid level sensing probe is placed. The fluid has a... | 06/21/1994 |
| 5211225 | Submersible pump adapter An adapter is provided for a submersible pump so as to permit the electrical cable to the submersible pump to be extended upwardly through the pipe column, which supports the submersible pump, to the upper end of the well. The positioning of the pump elec... | 05/18/1993 |
| 5211242 | Apparatus and method for unloading production-inhibiting liquid from a well A chamber in a well is connected to two externally separate tubing strings to unload liquid which is applying backpressure against a formation so that the production of fluid from the formation is obstructed. Volumes of the liquid are intermittently colle... | 05/18/1993 |
| 5147149 | Tension leg dewatering apparatus and method An apparatus and method are provided for dewatering an interior of a hollow tension leg connecting a tension leg platform to a floor of a body of water. The apparatus includes a pump having a suction inlet defined on its lower end and a discharge outlet o... | 09/15/1992 |
| 5139089 | Well cleanout tool and method A cleanout tool for removing debris from a deep borehole, the borehole being characterized by having a relatively low hydrostatic head or level of liquid in the borehole. A series of unique check valves acting in cooperation with a pumping section are use... | 08/18/1992 |
| 5131466 | Self actuated intake valve assembly for inlet subsurface reciprocating pumps The present invention is drawn to an inlet valve assembly for a subsurface sucker rod operated reciprocating piston pump and, more particularly an inlet valve assembly which is locked in its closed position when the pump is in its unanchored, non-pumping ... | 07/21/1992 |
| 5095976 | Tubing sand pump A sand pump for an oil well includes a tail pipe connected to a barrel. A swab on a mandrel is reciprocatingly operated within the barrel to draw fluid upward from the bottom of the tail pipe. A flap valve at the bottom of the tail pipe and a ball check v... | 03/17/1992 |
| 5058669 | Extraction system with a pump having an elastic rebound inner tube An elastic rebound pump comprises a flexible inner tube having a substantial elastic rebound surrounded by a pump housing. The inner tube defines an inner chamber and the pump housing forms an outer chamber for confining a pump fluid. The pump allows pres... | 10/22/1991 |
| 5040597 | Well apparatus including a pump and a firing head adapted to be inserted into a tubing which includes a perforating gun A perforating gun having no firing head and no primary explosives is attached to a tubing string and the tubing string is run into a borehole. A new well apparatus, having a firing head, is run into the tubing string until the firing head is adjacent the ... | 08/20/1991 |
| 4974674 | Extraction system with a pump having an elastic rebound inner tube An elastic rebound pump comprises a flexible inner tube having a substantial elastic rebound surrounded by a pump housing. The inner tube defines an inner chamber and the pump housing forms an outer chamber for confining a pump fluid. The pump allows pres... | 12/04/1990 |
| 4711299 | Apparatus and methods for pumping solids and undesirable liquids from a well bore An apparatus and methods for removing sand and debris from a well bore utilizes an elongated string which includes a pump functioning to pump debris into the string interior from the lower end of the well bore. The pump includes a stationary hollow piston... | 12/08/1987 |
