Rod Pumps and Accessories for Fluid Production with Sand and Particulates

Pampa Pumps

There are three configurations of the Harbison-Fischer Pampa Pump. They are the Pampa Tubing Pump, Pampa Traveling Barrel Insert Pump and Pampa Stationary Barrel Insert Pump. All use the concept of a longer than normal plunger and shorter than normal barrel, such that the plunger length is chosen based on stroke length and the barrel length is chosen based on pump depth, just the opposite from a standard API style pump.
These pumps are all excellent choices for rod pumping situations where normal style pumps have a tendency to stick or hang up due to particulates becoming trapped between the barrel and plunger. Since the plunger is longer than normal, it always strokes out of the barrel and washes clean with production fluid. Another feature is that the Pampa plunger is pulling the particulates away from the plunger/barrel interface on the upstroke, rather than running over the particulates and trapping them between the plunger and barrel.

The two Pampa Insert Pumps are intended for use in wells that require insert pumps and produce sand or other particulates. The Pampa Tubing Pump is recommended for high production rates with sand or other particulates that hang up or stick common plungers. Both styles are available in corrosion and abrasion resistant materials.

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Texas Stripper Pump

The Texas Stripper Pump was designed for shallow, sandy wells that are shut down between periods of production, which often causes standard pumps to sand up and stick. The outer jacket shields the discharge ports and forces the produced fluid to exit at the bottom of the outer jacket, keeping sand in-motion around the outside of the pump. This keeps sand from settling inside the pump during shut-down periods and keeps sand in-motion above the hold-down to help prevent the pump from sticking in the hold-down.
The Harbison-Fischer Texas Stripper Pump can be furnished with hardened or chrome plated barrels.

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Bottom Discharge Valve

The Harbison-Fischer Bottom Discharge Valve is designed to be used when sand or other particulates are produced with a standard, bottom hold-down rod insert pump.

Without a Bottom Discharge Valve the particulates can settle around the outside of the pump in the stagnant area above the hold-down and stick the pump in the seating nipple, preventing it from being retrieved with the sucker rods. This undesirable condition causes a tubing string to be pulled "wet" since the fluid cannot be drained.

The Harbison-Fischer Bottom Discharge Valve produces about twenty percent of the fluid through ports just above the standing valve, effectively keeping the fluid between the pump and the tubing in motion and preventing sand from settling above the seating nipple. A secondary benefit is that chemicals used for fighting corrosion are circulated through this normally stagnant area, protecting the outside of the pump from corrosive attack.

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Three Tube Pump

The Harbison-Fischer Three Tube Pump is the traditional trash pump for efficient operation in extremely abrasive or "dirty" production. The concept of this pump is to have large clearances (.014") between the plunger and barrels, allowing particulates and/or large quantities of particulates to pass between the plunger and barrels without causing them to stick or hang up.
The Three Tube Pump has the advantages of both a stationary barrel pump and a traveling barrel pump. It is rugged like a stationary barrel pump but has the top valve of a traveling barrel pump that closes when the pump is shut down, preventing particulates from settling into the pump and keeping particulates from settling around the pump's bottom hold-down. Excess slippage is prevented by the long slippage path between the multiple tubes.
The Three Tube Pump is available with regular or hardened barrels.

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Stuck Pump Unseating Device

With the use of the Harbison-Fischer Stuck Pump Unseating Device it is no longer necessary to risk damaging or breaking sucker rods when trying to unseat stuck pumps. Neither is it necessary to pull wet tubing strings or strip rods. This device is activated by lowering the tubing weight onto the tubing anchor or the bottom of the well bore until the stuck pump is pushed out of the seating nipple by the weight of the tubing.
This device is installed under the seating nipple above the tubing perforated nipple. After the Stuck Pump Unseating Device is actuated and the stuck pump is unseated, the tubing fluid will drain through the device and allow the pump to be pulled with the rods. A version is also available for tubing pumps.

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Double Valves

Double Valves can be installed with either or both of the traditional standing and traveling valves in a rod pump. This additional valve is installed in series with the normal valve and provides a second fluid check valve in the pumping system. The application for Double Valves is whenever the pump experiences valve seat cutting from high pressure fluid leaking past particulates trapped on the sealing face between the valve ball and seat. A second valve in series with the primary valve will hold back the hydrostatic pressure whenever particulates are trapped in the primary valve, preventing high pressure jet cutting of the primary seat.
These valves can be furnished in all materials for corrosion or abrasion resistance and are available as Stellite lined or rubber lined for severe pumping applications.

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Vertical Discharge Valve Rod Guide

This special valve rod guide directs the discharged fluid in an upward direction instead of directly against the inside of the tubing string at the pump discharge. A standard discharge rod guide can cause holes in the tubing during conditions of abrasion and corrosion. The Vertical Discharge Valve Rod Guide reduces this tendency by directing the pump discharge energy in an upward direction. It is available in standard steel or corrosion resistant materials.

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Modified API RH Pump for Adhering Scale Conditions

This special pump is assembled from standard components to aid with the problem of scale that adheres to pump parts, such as the inside of the pump barrel, causing the pump plunger to stick in the barrel when the pump is pulled or respaced.
The arrangement of the lengths of the barrel and plunger allow the plunger to positively stroke out of the barrel on the upstroke and downstroke, cleaning the plunger and barrel completely of adhering scale on each stroke. The difference between this pump and a standard RH pump is the length of the barrel, plunger and extensions. Since it is assembled from standard components, parts are readily available and can be furnished in materials for corrosion or abrasion.

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