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| Number | Title | Issue Date |
| 8083505 | Wear rings for downhole pump A downhole pump for a well has a barrel and a plunger. The barrel has a passage extending along the length of the barrel, with the passage having an inside diameter. The plunger has an outside diameter and is received by the barrel passage for relative reciprocal mo... | 12/27/2011 |
| 8066496 | Reciprocated pump system for use in oil wells A reciprocated pump positioned at the lower end of a string of tubing in a bore hole that provides a passageway for moving formation fluid to the earth's surface, including a pump barrel supported in communication with the tubing and a standing valve at the lower en... | 11/29/2011 |
| 8047821 | Ring rack oil pumping machine The Ring Rack Oil Pumping Machine is comprised of: a base, a frame mounted on the base, a roller mounted at the frame top, a sprocket case connects to the middle of the frame; a input shaft having a lower sprocket and a drive shaft having an upper sprocket are insta... | 11/01/2011 |
| 7891960 | Reciprocal pump for gas and liquids A pump for efficiently producing gas in wells having some liquids. The pump may be driven by a walking beam or horsehead pump. The pump of the invention produces gases and liquids separately. Gases may be produced up the annulus between the casing and hollow sucker ... | 02/22/2011 |
| 7607901 | Wear rings for downhole pump A downhole pump for a well has a barrel and a plunger. The barrel has a passage extending along the length of the barrel, with the passage having an inside diameter. The plunger has an outside diameter and is received by the barrel passage for relative reciprocal mo... | 10/27/2009 |
| 7458787 | Apparatus and method for reducing gas lock in downhole pumps The pump has a barrel with vent ports located therein and a plunger that reciprocates inside the barrel. The barrel has a standing valve and the plunger has a traveling valve. The plunger has a first portion with a seal between the plunger and the barrel and a secon... | 12/02/2008 |
| 7431572 | Hydraulic oil well pumping installation A hydraulic oil well pumping installation includes a down hole pump positioned down a well, the down hole pump including a master cylinder and at least one slave cylinder in axial alignment with the master cylinder. A master piston is positioned in the master cylind... | 10/07/2008 |
| 7404702 | Debris evacuation apparatus and method for an oil pump A debris evacuation apparatus and method evacuates debris in a pumping system that forms between the plunger exterior and barrel interior. The apparatus has at least one seal and one groove located south of the seal, with the seal blocking northward travel of debris... | 07/29/2008 |
| 7328748 | Thermal actuated plunger A downhole plunger for a gas/oil well comprises a valve to regulate fluid flow past the plunger and a thermal actuator to control the valve. The thermal actuator of the disclosed device enables the valve to open and close aperatures without relying on the physical i... | 02/12/2008 |
| 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 |
| 7225878 | Methods and apparatus for production of hydrocarbons Apparatus and methods for producing fluids from a well and for controlling the production of fluids from multiple wells, particularly from a remote location. The well is provided with a winch/cable drum having a cable wound thereon with a swabbing tool on the end of... | 06/05/2007 |
| 7168924 | Rod pump control system including parameter estimator A rod pump control system includes a parameter estimator that determines from motor data parameters relating to operation of the rod pump and/or downhole dynamometer card without the need for external instrumentation, such as down hole sensors, rod load sensors, flo... | 01/30/2007 |
| 7144232 | Water well pump The present invention contains a one-way standing valve holder and a one-way traveling valve holder. Contained within a shell of the standing valve holder are a nipple at the upper end and an intake tube at the lower end. A piston rod extends down from the earth's s... | 12/05/2006 |
| 7048522 | Fluid balanced pump A rodless pump is disclosed which is connected to a pressure source via a first conduit. In a common oilfield application the pump would be connected to the bottom of a tubing string within the reservoir fluid to be produced. A pressure source such as a hydraulic pu... | 05/23/2006 |
| 7008197 | Debris evacuation apparatus and method for an oil pump A debris evacuation apparatus and method evacuates debris in a pumping system that forms between the plunger exterior and barrel interior. The apparatus has at least one seal and one groove located south of the seal, with the seal blocking northward travel of debris... | 03/07/2006 |
| 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 |
| 6971856 | Plunger for well casings and other tubulars A plunger for well casings and tubulars comprising: an upper valve rod segment slideably positioned within the plunger body; a valve rod tube slideably positioned in the lower end of the plunger body; a lower valve rod segment slideably positioned in the valve rod t... | 12/06/2005 |
| 6945762 | Mechanically actuated gas separator for downhole pump A reciprocating downhole pump has a gas separator located at its bottom end. The separator forms a chamber that is expanded and contracted when the pump is reciprocated. Expansion and contraction of the chamber occurs by either the plunger reciprocating in the chamb... | 09/20/2005 |
| 6926504 | Submersible electric pump An improved electrical pump is first provided for use in a wellbore. The pump comprises a stator and a stator housing, and an armature and an armature housing. The stator housing and the armature housing define concentrically nested tubular bodies. The armature hous... | 08/09/2005 |
| 6877965 | Mechanical bladder pump A mechanical bladder pump is provided for collecting fluid samples from a well. The pump includes an outer tubular member having a longitudinal bore, and an inner tubular member arranged within the bore of the outer tubular member. The inner and outer tubular member... | 04/12/2005 |
| 6851480 | Gas operated automatic, liquid pumping system for wells An improved, unattended, liquid pumping device for oil and gas wells featuring a bellows controlled flow valve that opens and closes at preset pressures. Additionally a well head receiver design that releases shut in production gas below the pumping device and provi... | 02/08/2005 |
| 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 |
| 6817409 | Double-acting reciprocating downhole pump A positive displacement pump for pumping fluids from a downhole formation to the earth's surface is provided. The pump first comprises a plunger. The plunger is reciprocated axially within the wellbore by a linear actuator, such as a submersible electrical pump, in ... | 11/16/2004 |
| 6746221 | Traveling valve for sucker rod pumps A traveling valve for use in a sucker rod pump having a cylindrical housing having an interior passageway and a tapered shoulder formed therein and a piston received within the interior passageway and slidable therein. The piston has a mechanically operated sliding ... | 06/08/2004 |
| 6746222 | Bottom discharge valve A bottom discharge valve is located on the bottom of the pump barrel just above the standing valve. The externally threaded pin end of the standing valve threads into the lower internally threaded portion of the bottom discharge valve. The externally threaded or pin... | 06/08/2004 |
| 6685451 | Valve assembly for sucker rod operated subsurface pumps A valve assembly for an oil pumping system including a shell, a seat affixed in a lower end of the shell, a ball positioned within the shell and having a diameter greater than a diameter of the seat, and a cage positioned within the interior passageway of... | 02/03/2004 |
| 6659741 | Travelling valve assembly for a fluid pump A travelling valve assembly for use in a sucker rod activated fluid pump includes: a flow through body member having at least one rounded groove formed in the lower end of a central passageway of the flow through body member; and a downwardly depending me... | 12/09/2003 |
| 6537042 | Positive-displacement pump A positive-displacement pump (lifting pump) comprises a pump housing with a pump chamber having an inlet and an outlet passage controlled by an outlet check valve; a displacement member which delimits the pump chamber in one direction of movement of the d... | 03/25/2003 |
| 6481987 | Travelling valve for a pumping apparatus An improved travelling valve has a ball which is positioned on a seal stem, so that the ball is reliably centered when seated on the valve seat, reducing damage to the ball and seat from improper seating and providing increased efficiency for deviated or ... | 11/19/2002 |
| 6368084 | Downstroke sucker rod well pump Fluid pumping apparatus for pumping fluids from a well comprising a downhole pump disposed near the lower end of a production string and including a tubular pump barrel and a tubular pump plunger concentrically disposed in the pump barrel in a sliding and... | 04/09/2002 |
| 6347668 | Relievable check valve assembly for oil wells and water wells A relievable check valve assembly having various trigger forms for oil wells and water wells adapted to control the liquid flow when inserted tubing is being removed from a well.... | 02/19/2002 |
| 6273690 | Downhole pump with bypass around plunger The downhole pump has a barrel with a reciprocating plunger therein. The barrel has a first one-way valve, while the plunger has a second one-way valve. A barrel chamber is formed between the two one-way valves. The barrel chamber expands when the recipro... | 08/14/2001 |
| 6200103 | Gas lift plunger having grooves with increased lift A plunger in a plunger lift system in an oil and gas well includes circumferential recessed surfaces that define grooves spaced along the plunger body. A curved convex surface or radius is formed between the lower extent of each recessed surface and the p... | 03/13/2001 |
| 6164936 | Vertical reciprocating pump having easily installed piston with flap valves A vertically reciprocating pump is described, characterized by a piston which has a support including a hub extending downwards and supporting reinforcement legs, the hub having a rod to which it is translatably coupled passing therethrough, and by a valv... | 12/26/2000 |
| 6148923 | Auto-cycling plunger and method for auto-cycling plunger lift An auto-cycling plunger and method for lifting out condensate and fluid that accumulate and retard production in oil and gas wells. The auto-cycling plunger comprises a tube that defines an inner chamber, one or more flapper sealing rings mounted on the t... | 11/21/2000 |
| 6145590 | Device for removing sand from pump plungers A sand removal apparatus for use with an oil pumping apparatus in which a first sand remover is attached between a valve rod and a plunger of the oil pumping apparatus and a second sand remover is attached to a bottom of the plunger within the working bar... | 11/14/2000 |
| 5651666 | Deep-well fluid-extraction pump This invention features a small-enveloped (with an outside diameter of at least approximately 38 mm), single-acting, hydraulically-operated, reciprocating, deep-well, fluid-extraction pump, operable in non-straight and angular wells, and its mode of opera... | 07/29/1997 |
| 5618169 | Water well pump cylinder components Water well pump plunger efficiency is improved by providing a pair of upwardly open outwardly flared wall cups surrounding a pump plunger and supported in superposed relation by a sleeve in the lowermost cup. A fluid passageway through the base of the upp... | 04/08/1997 |
| 5382142 | Wall pump having backwash valve actuator A backwash valve for use in a sucker-rod actuated fluid pump, may be selectively actuated to permit both the standing and traveling ball valves to be unseated at the same time permit the pump to be backwashed and/or the production tubing string drained.... | 01/17/1995 |
| 5372488 | Oil well pump with radially expandable interlocking seal ring Improvements in a downhole submerged pump assembly having a plunger formed of a cast or machined cylindrical member includes seal ring grooves capable of receiving flat metallic seal rings formed of a plurality of segments which are interlocked in a manne... | 12/13/1994 |
