Hydraulic and Progressive Cavity Pumps Quiz

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Questions and Answers

What generally powers the rotor in a progressive cavity pump?

A hydraulic piston

A subsurface electric motor

Rods connected to a motor on the surface (correct)

A gas engine

Which pump type works by moving fluid from inlet to outlet under its own momentum?

Progressive cavity pump

Hydraulic piston pump

Centrifugal pump (correct)

Reciprocating rod pump

What is one limitation of using a reciprocating rod pump?

Lower volumetric efficiency in certain well conditions (correct)

High energy consumption compared to other pumps

Inability to handle high solids content

High operational costs

Which statement is true regarding beam pumping units?

Beam pumping is the most common method for artificial lift. Signup and view all the answers

What is a major advantage of progressive cavity pumps?

Ability to handle fluids with high solids content Signup and view all the answers

In what applications are progressive cavity pumps commonly used?

Heavy oil production and waterflood projects Signup and view all the answers

Which of the following statements about reciprocating rod pumps is NOT true?

They have higher volumetric efficiency in high gas-liquid ratio wells. Signup and view all the answers

What component of a reciprocating rod pump system connects the beam pumping unit to the downhole pump?

Sucker rods Signup and view all the answers

What is a key advantage of hydraulic pump systems?

They can produce high rates of produced fluids. Signup and view all the answers

What is a characteristic of reciprocating hydraulic pumps?

They drive a piston to pump fluids. Signup and view all the answers

What is a disadvantage of using oil as a power fluid in hydraulic pumping systems?

It poses a potential fire hazard. Signup and view all the answers

What happens to the power fluid in a hydraulic jet pump?

It mixes with the formation fluid for lifting. Signup and view all the answers

What is one depth range where hydraulic pump systems can effectively operate?

1,000 to 17,000 feet. Signup and view all the answers

What limitation is associated with the use of downhole hydraulic pumps?

They are not suitable for deeper wells due to torsional stresses. Signup and view all the answers

What is a challenge when pumping fluids with high solids content?

It leads to difficulty in utilizing hydraulic systems. Signup and view all the answers

How does a hydraulic jet pump increase the pressure of the fluid mixture?

By passing it through an expanding-diameter diffuser. Signup and view all the answers

What is the maximum operating total vertical depth (TVD) for a Rod Pump?

16000 ft Signup and view all the answers

Which artificial lift method has the highest typical operating volume in BFPD?

PCP Signup and view all the answers

What is the typical operating range for the Hydraulic Jet method in terms of BFPD?

100 - 10000 BFPD Signup and view all the answers

Which of the following artificial lift methods allows for operations at depths up to 20000 ft?

Hydraulic Piston Signup and view all the answers

What is the maximum operating volume for the ESP method?

5000 BFPD Signup and view all the answers

What is a potential issue associated with high water cuts in water drive reservoirs?

Problems for lifting systems Signup and view all the answers

How can the presence of H2S, CO2, or salt water affect a reservoir?

Cause corrosion Signup and view all the answers

What factor influences the amount of surface energy required to move fluids in a well?

Well depth Signup and view all the answers

What effect does small-diameter casing have on production?

Limits production tubing size Signup and view all the answers

What is the impact of wellbore deviation on pumping systems?

Can limit the application of beam pumping systems Signup and view all the answers

Which factor is governed by wellhead pressures and backpressures?

Flow rates Signup and view all the answers

In the context of production systems, what can increase backpressure on a well?

Fluid scale or paraffin Signup and view all the answers

What restricts the production rates in wells with small-diameter tubing?

Excessive fluid fallback Signup and view all the answers

What does the Inflow Performance Relationship (IPR) primarily define?

A well's flowing production potential Signup and view all the answers

Which statement about the flowing bottomhole pressure (pwf) is correct in relation to production rate?

Lower pwf produces higher production rate. Signup and view all the answers

What would be the max flow potential of a well according to IPR?

When pwf is zero Signup and view all the answers

Which artificial lift method utilizes gas injection to optimize production?

Gas lift systems Signup and view all the answers

What are dynagraphs used for in reciprocating rod pump systems?

Visualizing pumping unit operation Signup and view all the answers

In selecting an artificial lift method, which of the following factors is crucial?

Type of reservoir fluid and production characteristics Signup and view all the answers

What does the abbreviation ESP stand for in artificial lift systems?

Electric submersible pump Signup and view all the answers

Which statement is true about the design considerations for hydraulic pump systems?

Design must consider subsurface hydraulic pumps. Signup and view all the answers

What is a significant drawback of rod pumping systems when used in deviated wells?

Susceptibility to gas locking Signup and view all the answers

What additional equipment is commonly required for effective deployment of gas lift systems in horizontal sections?

Coiled tubing or special tools Signup and view all the answers

How does back pressure from rod pumps affect fluid production in wells?

It decreases production rates due to fluid head Signup and view all the answers

What is a limitation of gas lift systems in deviated wells?

Gas tends to segregate to high points in the well Signup and view all the answers

What happens to liquids and solids if they accumulate in the low points of an undulating lateral leg?

They can create large slugs that hinder production Signup and view all the answers

Which factor limits the installation of gas lift equipment in horizontal well sections?

Maximum deviation angles for wireline tools Signup and view all the answers

What is a primary problem associated with the rods in a rod pumping system in deviated wells?

They may wear out the tubing due to friction Signup and view all the answers

What percentage of energy consumed does gas lift typically deliver into lift in deviated wells?

Less than 20 percent Signup and view all the answers

Study Notes

Artificial Lift Overview

Artificial lift is used in mature, depleted fields where natural energy is insufficient to produce.
Two major categories of artificial lift: gas lift and pump-assisted lift.
Another method: plunger lift which combines elements of both categories.

Gas Lift

In gas lift, high pressure gas is injected; this reduces the fluid density reducing bottomhole pressure which allows for higher production rates.
Two main types: continuous gas lift and intermittent gas lift
Continuous gas lift: injects gas constantly, lowering fluid density and enabling higher production rates; typically for wells with high productivity indexes.
Intermittent gas lift: injects slugs of high pressured gas, displacing fluid to the surface; used for low productivity wells.
Advantages: flexible, optimizes production, good in high GOR wells, relatively easy to modify,
Disadvantages: additional costs, pressure losses and corrosion, more difficult to fully deplete low-pressure wells.

Reciprocating Rod Pump Systems

This is the most common artificial lift method.
Components: beam pumping unit, rods, subsurface pump
Rod string design, API system design, pumping unit design procedures
System monitoring (dynagraphs), rod versus displacement load,

Progressive Cavity Pump Systems

A spiral rotor turns inside an elastomer lined stator.
Used for dewatering coal bed methane; production and injection in waterflood projects; heavy or high-GOR wells
Advantages: versatility and handling of high solids content, highly efficient
Disadvantages: high torsional stresses, high temperature limitations for stator elastomers

Hydraulic Pump Systems

Injects power fluid (light oil or water) to operate a downhole pump.
Two types: reciprocating hydraulic pump (injects power fluid operates a downhole fluid engine), and a hydraulic jet pump (no moving parts); uses a high-velocity jet to lift fluid.
Advantages: versatile, handles high solids content, easily circulated
Disadvantages: fire hazard, difficulties in pumping high solids content production fluids, high pressure compared with pump assisted lift.

Electrical Submersible Pump Systems

A downhole centrifugal pump driven by submersible electric motor.
Used for high-volume wells.
Advantages: Cost effective, high efficiency, suited for high-volume , high-water-cut production.
Disadvantages:, susceptible to gas lock or sand damage ,requires high-GOR fluid separator.

Plunger Lift

The plunger, sometimes called a "rabbit", is automatically dropped into the wellbore.
It displaces the liquid and reaches the bottom of the tubing.
The plunger moves up due to gas pressure.
A cost-effective method to produce gas wells with fluid loads and high GOR oil wells.

Selecting an Artificial Lift Method

Determining the appropriate method depends on factors like reservoir characteristics (IPR, liquid production rate, water cut, GOR, viscosity, etc.) and operational considerations.
Surface and field operating characteristics like flow rates, tubing sizing, wellbore deviation, and other considerations are crucial in the selection.

Artificial Lift Methods in Wells

Continuous gas lift, intermittent gas lift, rod pump, PCP, hydraulic pump, etc. are the common artificial lift methods used in different well conditions and production requirements.

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Description

Test your knowledge about hydraulic and progressive cavity pumps with this comprehensive quiz. Explore various aspects such as their advantages, limitations, and applications in the pumping industry. This quiz covers essential concepts related to pump systems and their operations.