Category Archives: Equipment & Technology

Basic Steps to Shoot a Liquid Level using TWM

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Before detailing the basic steps to shoot a liquid level, this article will present few benefits of the operation. Fluid Level measurements can provide invaluable information to assist anyone that has an interest in both understanding and evaluating well, or reservoir, performance.

When combined with a surface pressure measurement, the fluid depth in a wellbore can be used to calculate the pressure at the sandface, for either a producing or shut-in well status.

Sandface pressure determination is paramount to help evaluate reservoir characteristics and pressure depletion, as well as determining the producing performance of a well.

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Surface Components of Sucker Rod Pumps in different languages

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The working principle of a sucker rod pumping unit, as well as its components, have been detailed in a previous article titled: “Beam Pumping Unit Principles and Components”. This article will focus on the names of surface components of sucker rod pumps used in different languages, namely: Arabic, English, and French.

NB: As a reminder, beam pumping unit is a machine for translating rotary motion from a crankshaft to a linear reciprocating motion for the purpose of transferring mechanical power to a down-hole pump. The purpose, simply stated, of the basic system is to transmit energy from the surface to the downhole pump.

The following figure depicts the main components of a surface sucker rod pumping unit (conventional type in this case).

The following table presents the names of surface components of sucker rod pumps  Arabic, English, and French languages:

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10 Types of Rod Pumping Units

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1. Conventional Unit:

The conventional pumping unit is a modern version of the beam pumping unit first built in 1926 with the invention of crank counterbalance.  It is a rear mounted class 1 lever system with crank counterbalance.

Typically, if one were to drop a plumb line off the equalizer bearing that line would fall over the center of the crankshaft. This machine can be rotated both Clockwise (CW) and Counterclockwise (CCW) with approximately the same performance characteristics.

It is manufactured in a wide variety of sizes and it can be fitted with many types of prime-mover bases that attach to the normal unit base.

This is the most common pumping unit type, because of its relative simplicity of operation, low maintenance requirements and adaptability to a wide range of field applications. As the cranks on a conventional unit rotate, the pitman side members cause the walking beam to pivot on a center bearing, moving the polished rod. Adjustable counterweights are located on the cranks.

As detailed by the article titled “Beam Pumping Unit Principles and Components“, most important parts of the conventional units are: Base, Counterweight, Crank, Samson Post, Horse Head, Walking Beam, Equalizer, Pitman, Gear Reducer, Brake and Prime Mover.

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Beam Pumping Unit Principles and Components

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Beam pumping Unit Principles:

A beam pumping unit is a machine for translating rotary motion from a crankshaft to a linear reciprocating motion for the purpose of transferring mechanical power to a down-hole pump.

The purpose, simply stated, of the basic system is to transmit energy from the surface to the downhole pump.  The resulting configuration has been referred to as a Sucker Rod Pumping System.

Beam pumping Unit Components: Continue reading →

Rod Rotator extends the life of rod-pumped wells

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The constant up-and-down movement of a sucker rod creates excessive friction between rods and tubing which can result in premature rod and tubing failures due to excessive wear. If left unchecked, this generally requires a costly intervention to make repairs.

To extend the sucker rod run life, one of the widely used techniques is the use of rod rotators. A rod rotator is a mechanical device installed on the polished rod between the carrier and the polished rod clamp. It incrementally rotates the rod with each stroke. A rotating mechanism with an actuator lever arm is connected to the walking beam with a metal string. As the surface unit moves up and down, it pulls and releases this metal string so that, moves the actuator lever arm up and down. The rotation mechanism is activated and this slowly rotates the polished rod and the rod string below.

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