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II. Now read the text and for each of the questions 1-5 choose the answer (a, b, c or d) which you think best fits according to the text. Pipeline operation

When a pipeline is built, the construction project not only covers the civil work to lay down or bury the pipeline and build the pump/compressor stations, it also has to cover all the work related to the installation of the field devices that will support the remote operation of these networks.

Field devices are basically instrumentation, data gathering units and communication systems. The field instrumentation includes flow, pressure and temperature gauges/transmitters, as well as other devices to measure the relevant data required to operate. These field instruments are installed along the pipeline on some specific locations, such as injection or delivery stations, pump stations (liquid pipelines) or compressor stations (gas pipelines), and block valve stations.

The information measured by these field instruments is then gathered in local Remote Terminal Units (RTU) that transfer the field data to a central location in real time using communication systems, such as satellite channels, microwave links or cellular phone connections.

Pipelines are then controlled and operated remotely, from what is usually known as the Main Control Room. In this specific center, all the data related to field measurement are consolidated in one central database. The data are received from the multiple RTUs installed along the pipeline. It is common to find RTUs installed at every station along the pipeline.

The SCADA system at the Main Control Room, then receives all the field information and presents it to the pipeline operator through a set of screens or SCADA Human Machine Interface, showing the main operational conditions of the pipeline. The operator can monitor the hydraulic conditions of the line, as well as remotely manipulate pumps, compressors, valves, deliveries, etc. sending operational commands (open/close valves, turn on/off compressors or pumps, change setpoints, etc.) through the SCADA system to the field.

To optimize and secure the operation of these assets, some pipeline companies are using what is called Advanced Pipeline Applications, which are software tools installed on top of the SCADA system, that provide extended functionality to perform leak detection, leak location, batch tracking (liquid lines), pig tracking, composition tracking, predictive modeling, look ahead modeling, operator training and more.

  1. What do the pipeline construction projects include?

  1. The pipeline design and related project documentation.

  2. Building and construction works as well as the installation of devices to control the pipeline operation at a distance.

  3. Burying pipelines and constructing compressor stations.

  4. All the work related to the installation of remote control devices.

  1. What are the tree basic types of pipeline field devices?

  1. Flow, pressure and temperature gauges.

  2. Instruments installed at the injection or delivery stations, the pump or compressor stations and at the block valve stations.

  3. Instrumentation, data gathering units and communication systems.

  4. Injection or delivery stations, the pump or compressor stations and the block valve stations.

  1. What is the function of a Remote Terminal Unit?

  1. To gather data measured by field instruments.

  2. To transfer the field data to a central location.

  3. To provide real time access to communication systems, such as satellite, microwave or cellular phone connections.

  4. All the above-mentioned.

  1. What is the Main Control Room?

  1. The center, which controls the overall operation of a pipeline at a distance.

  2. It is a room where the Remote Terminal Units are located.

  3. This is a room where pipeline operators spend their free time between the working shifts.

  4. This is a computer where the central field information database is kept.

  1. What are the SCADA system and the Advanced Pipeline Applications designed for?

  1. To present field data to the operator using a special interface.

  2. To help the operator monitor the pipeline operational conditions and operate various pipeline systems as well as to get access to different extended functions.

  3. To perform environmental control over the pipeline e.g. preventing leaks and carrying out predictive modeling in emergency cases.

  4. Automatically detect, locate and repair leaks in a pipeline.

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