Abstract: Data characterizing a load on a rod of a down-hole pump at different positions of a stroke of the rod can be received. An image characterizing the load of the rod at the different positions of the stroke can be determined. A defect in operating conditions of the down-hole pump can be determined. The determining can include comparing the image to a set of predetermined images with associated defects. The determined defect can be provided.

Abstract: Methods and devices for collecting fluid include a self-closing system that automatically halts fluid collection once a sufficient amount of fluid has been collected and a locking mechanism that automatically activates a pressure compensation system in order to maintain the collected fluid in the same phase in which it was collected.

Abstract: A flow energy harvesting device having a harvester pipe includes a flow inlet that receives flow from a primary pipe, a flow outlet that returns the flow into the primary pipe, and a flow diverter within the harvester pipe having an inlet section coupled to the flow inlet, a flow constriction section coupled to the inlet section and positioned at a midpoint of the harvester pipe and having a spline shape with a substantially reduced flow opening size at a constriction point along the spline shape, and an outlet section coupled to the constriction section. The harvester pipe may further include a piezoelectric structure extending from the inlet section through the constriction section and point such that the fluid flow past the constriction point results in oscillatory pressure amplitude inducing vibrations in the piezoelectric structure sufficient to cause a direct piezoelectric effect and to generate electrical power for harvesting.

Abstract: A method for downhole delivering of chemicals to a wellbore at the level of a hydrocarbon-bearing formation using an assembly formed form a blank tubular with first and second perforation sections, a no-flow nipple connected on one end and a bull plug connected on the other end, wherein the chemical is in solid phase, and slowly dissolves when exposed to wellbore fluids forming a method that can be repeated with the same equipment but additional charges of chemical.

Abstract: A downhole assembly for delivering chemical treatment to a wellbore at the level of a hydrocarbon-bearing formation is provided. The chemical treatment is in solid phase, and slowly dissolves when exposed to wellbore fluids.

Abstract: According to one or more aspects of the present disclosure, a motor protector comprises a housing defining a compensator chamber; a compensator disposed in the housing having a motor fluid end in fluid communication with a motor fluid and a well fluid end, the compensator axially moveable relative to the housing in response to the expansion and contraction of the motor fluid; and a port formed through the housing to provide fluid communication from exterior of the housing to the well fluid end of the compensator. The compensator may be one selected from the group of a bellows and a plunger.

Abstract: An inlet apparatus for a well pump.

Abstract: A plunger in a plunger lift system in an oil and gas well includes shaped grooves spaced along the plunger body, angled fins or below the grooves, an elongated interior cavity open at the bottom, and passages connecting the interior cavity to the grooves. The shape, sizing and spacing of the grooves improves plunger seal and decreases liquid loss during plunger lift. The flutes or fins spin the plunger to clean the tubing string and prevent the plunger from becoming stuck in the lubricator. The interior cavity lightens the plunger and, in combination with the passages, improves the seal created by the shaped grooves.

Abstract: A plunger mechanism comprises an adjustable bypass valve. Depending on well parameters, a user may desire to adjust the descent rate of a plunger in service. The present device allows the user to vary or adjust the bypass orifice to alter the flow of liquid through the plunger core.

Abstract: A method of pumping upper production fluid from an upper level of an underground pool of production fluid and pumping lower production fluid having a higher concentration of sand from a lower level during a single pump cycle comprises providing a dual action reciprocating piston pump comprising a pump barrel and a reciprocating piston dividing the pump barrel into a lower and upper chambers. On a downstroke upper production fluid is drawn from the upper level into the upper chamber through an upper intake, and lower production fluid present in the lower chamber is forced up a tube toward ground surface. On an upstroke lower production fluid is drawn from the lower level into the lower chamber through a lower intake, and upper production fluid in the upper chamber is forced up the tube toward ground surface.

Abstract: A system is provided for unloading accumulated liquids and enhancing the recovery of gas from a reservoir having diminished pressure. An annulus between a tubing string and casing is isolated by a packer and continually pressurized with a slipstream of compressed gas while the well continues to produce. A unique valve positioned in the tubing string is shuttled between a production position in which production fluids are permitted to bypass the valve to the surface and a lift position in which the bypass is blocked and an unloading port is opened to vent high pressure annulus gas to the tubing string above the valve, lifting accumulated liquids with it. Preferably, the valve is actuated to the lift position by the impact of a plunger dropped from a lubricator at the wellhead, when the pressure in the annulus has reached a predetermined threshold.

Abstract: A plunger for use in downhole tubulars in wells which produce fluids and/or gases under variable pressure, which has an internal passage to facilitate more rapid descent of the plunger to the well bottom or well stop. The plunger has a stopper housed inside a chamber that is actuated when the plunger and stopper stem reach bottom or a well stop and which is held in a closed position by the build up of pressure below the plunger. The plunger may also have a jacket mounted about a core which has sealing, holding, and lifting capabilities. The plunger may also have fingers which project inwardly from the underside of the jacket toward the inner core which may also be grooved and which provides an inner turbulent or labyrinth-type seal.

Abstract: 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 barrel of the oil pumping apparatus. The first sand remover has a body with an interior passageway extending longitudinally therethrough. The body has a first threaded end attached to the plunger cage associated with the valve rod of the oil pumping apparatus and a second threaded end attached to the plunger. A circumferential groove extends around the body between the ends. A wiper is positioned within the circumferential groove so as to have an edge extending outwardly of the groove so as to be in wiping contact with the working barrel. The second sand remover has a body with an interior passageway extending longitudinally therethrough and having a first threaded end attached to the bottom of the plunger.

Abstract: The present invention relates to an apparatus and a method for multiplying the hydrostatic head of a column of liquid into a magnified injection pressure for injecting water produced in a gas well into a disposal zone, while concurrently producing the gas, with little or no water, to the ground surface.

Abstract: A side intake valve assembly for use in a subterranean well in conjunction with a second or lower valve assembly, and a hollow connecting body for connecting the side intake valve assembly and the second or lower valve assembly. The side intake valve assembly allows water separated from the production fluid to be forced downwardly through the intake valve assembly and the second or lower valve assembly into a water disposal zone. A one-way valve in the side intake valve assembly is a gravity operated ball valve.

Abstract: A system for selective production from, and stimulation of, subterranean production zones while improving productivity and enhancing control of the well. Portions of a production tubing string and an internal stimulation/shifter string are assembled and run together as completion segments. Consecutive completion segments, with each segment including packers that surround sleeves and terminate at the upper end in a well control valve, are run into the cased wellbore so that the acid flow ports operated by sleeve valve assemblies are placed proximate the perforations of prospective production zones. The production zones are then stimulated as the stimulation/shifter string is moved progressively outward placing acid at each consecutive zone. The stimulation/shifter string is then removed from the production tubing string, mechanically closing the well control valve assembly by tubing manipulation.

Abstract: This invention provides the structure and operation of a double-acting, deep-well fluid extraction pump assembly which includes a power piston housed on top of a pumping piston along with a power control system. The pumping piston has a dynamic, reciprocating, bi-directionally self-cleaning, suction filter and houses poppet-type, uni-directional, fluid flow control valves that control the inflow and outflow of extracted fluid through the pumping piston. Gland membranes and a number of double-acting, lineal, fluid motor pistons divide the power piston into pressure chambers and into fluid conduits, with the divisions conjointly providing a path for inflow of hydraulic power fluid and a path for outflow of extracted fluid. The power control system includes a four-way, directional, flow-control valve for controlling cycling frequency, a timer and a flow switch for controlling recovery periods, an unloading relief valve for controlling fluid pressure and a flow-control valve for controlling pumping speed.

Abstract: A downhole tool for removing sand from a well bore has an elongated tubular member with four sections. A one-way valve is located between the upper first and second sections. A second one-way valve is located between the third and fourth sections, while a third one-way valve is in the fourth lower section. The second and third sections are formed into a piston assembly which when reciprocated moves fluid in the well bore from the fourth section to the first section in an incremental fashion. Each piston stroke traps portions of fluid at different locations along the tubular member because of the one-way construction of the valves, and moves that trapped portion incrementally upwardly within the device. Sand is accumulated in the second and fourth sections of the member, and the sand in the fourth section is prevented from backflowing into the piston section to foul the pump.

Abstract: A well clean out apparatus of the reciprocating pump, recirculating, type has two debris entrapment chambers below and one fluid chamber above the pump. The pump piston has a stack of flat washers to function as piston packing. The washers are axially and radially loose fitting to allow some movement to enable particles to work past each washer to avoid sand jamming. The washer stack, collectively, resists fluid by-pass around the piston. The pump is inverted and fluid flows through the piston rod to increase fluid velocity in the piston vicinity.

Abstract: A dispenser for well treating chemicals for pumping oil wells, for attachment to the bottom end of the tubing string, comprises a long cylindrical container, closed at top and bottom, about the same diameter as the tubing and rigidly attachable to the bottom end of the tubing. The bottom end of the chamber is preferably pointed, with at least one opening in the bottom end. The chamber is filled with chunks of solid chemical, of a nature normally used for treating wells. In the normal pumping action, the weight of the well fluid filling the tubing to the surface is supported by the sucker rods during that part of the pumping cycle when the rods are moving up. When the rods are moving down, the weight is carried by the tubing. This varying load on the tubing causes it to lengthen under load, and shorten, so that the bottom end of the tubing raises and lowers through a range of a foot or more.