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7556100 |
Apparatus and method for delivering chemicals into an underground well
In some embodiments, a method of delivering at least one chemical into an underground well equipped with a reciprocating plunger includes retaining the plunger above the well after the well is...
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7540323 |
Well pumping system with pump rod trash cups
A rod actuated downhole well pumping system is provided with spaced apart annular elastomer members secured to the pump rod at predetermined intervals to prevent solids particulates entrained in...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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....
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RE37995 |
Progressive cavity pump with flexible coupling
A progressive cavity pump 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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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4493383 |
Well clean out tool
The present invention relates to a well clean out tool comprising an elongated body having first and second ends and being adapted to be received within a well borehole. The elongated body is...
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4469170 |
Liquid skimmer apparatus
Apparatus for skimming an overlying non-conductive lighter liquid from an underlying conductive heavier liquid in a two-liquid body which are particularly applicable for recovering oil and/or...
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4190113 |
Well cleanout tool
A well cleanout tool which requires no hydrostatic head, and which can be either wireline or tubing conveyed and actuated. The tool comprises an elongated main body having a pump means flow...
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4187912 |
Method and apparatus for pumping fluids from bore holes
Well pumping method and apparatus by means of which the liquid level and, correspondingly, the hydrostatic pressure, in a bore hole or well casing, is controlled by means of a vertically adjustable...
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3802502 |
APPARATUS FOR DETECTING THE ENTRY OF FORMATION GAS INTO A WELL BORE
In the representative embodiments of the apparatus of the present invention disclosed herein, one or more unique sampling devices are arranged between the upper and lower telescoping members of a...
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3746091 |
CONDUIT LINER FOR WELLBORE
A liner for emplacement in a conduit in a well penetrating subterranean formations characterized by an annular body portion having substantially cylindrical interior and exterior surfaces that are...
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3739847 |
COMBINATION WELL BAILER AND SWAB
A combination well bailer and swab having a plunger slidably disposed in the body of the bailer and a swab cup supporting mandrel secured to the lower end of the bailer with an overload relief...
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3621925 |
WELL BAILER
A plunger for use in well bailers and drilling tools having a plunger mandrel slidably disposed in the body of the bailer and rigid piston rings on the mandrel. The rings have a smaller outside...
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3265133 |
Gas well treatment apparatus
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3164209 |
Well bore cleaning tool
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3138215 |
Sand pump
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2992682 |
Bailer and sand pump
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2890756 |
Hydraulic type junk basket for wells
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2859828 |
Down hole hydraulic pump for formation testing
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2850097 |
Method of sampling well fluids
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2785756 |
Well bailers
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