Expansion Systems Turbine

The turbine expansion low-temperature liquid recovery system differs from the choke or valve expansion in that the turbine turns a shaft from which work is extracted. Technical Data used in the field explained in petroleum courses in Islamabad.  A typical turbo-expander process is The gas enters through an inlet separator with any liquid separated at this point being introduced to a low point in the stabilizer tower. The gas then goes through heat exchange with the cold gas leaving the stabilizer. Another separator is installed if sufficient liquid is formed in the gas-to-gas exchanger with the liquid being introduced at an intermediate point in the stabilizer. The cold gas then flows to the expander where the pressure is reduced and low temperature achieved. The gas and liquid mixture  leaves the expander and flows to the separator that normally is on top of the stabilizer column. Sales gas flows back through the exchanger and may be compressed in the direct-connected centrifugal compressor before being put into the sales gas line. Since extremely low temperatures are reached in a typical turbo-expander plant, dehydration normally is a first step though some plants do use alcohol injection. Some more details of petroleum courses in Islamabad are as under.

The gas frequently is expanded below sales gas pressure and then recompressed to make use of the work that must be extracted from the shaft of the turbine. The stabilizer is either a demethanizer or deethanizer with the mixed hydrocarbon product being sold.

A fairly recent development in gas processing, the turbo-expander process is one of great simplicity and ease of operation. The favorable operating characteristics allow the plant to run unattended through long periods and its simplicity and relatively low investment cost make it an attractive option. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join oil field after petroleum courses in Rawalpindi.

Crude Oil Emulsions

Much of the oil produced worldwide is accompanied by water in an emulsion that requires treating. Even in those fields where there is essentially no initial water production. Technical Data used in the field explained in petroleum courses in Islamabad. water cuts may increase in time to the point where it is necessary to treat the emulsion. Water content of the untreated oil may vary from a fraction of I % to over 90%. To prevent increased transportation costs, water treatment and disposal costs, and deterioration of equipment, purchasers of crude oil limit the basic sediment and water (BSSCW) content of the oil they purchase. Limits vary depending on local conditions, practices. and contractual agreements and typically range from 0.2 to 3.0%. BY&W is usually predominantly water but may contain solids.

The solids contained in the BS&W come from the producing formation and consist of sand. silt, mud, scale. And precipitates of dissolved solids. These troublesome solids vary widely from producing field to field. zone to zone, and well to well.

Purchasers may also limit the salt content of the oil. Removing water from the stream decreases the salt content. Salt content along with BS&W are the two important crude purchasing requirements. Some more details of petroleum courses in Islamabad are as under.

An emulsion is a heterogeneous liquid system consisting of two immiscible liquids with one of the liquids intimately dispersed in the form of droplets in the second liquid. An emulsion is distinguished from a simple dispersion of one liquid in another by the fact that, in an emulsion, the probability of coalescence of droplets on contact with one another is greatly reduced because of the presence of an emulsifier, which inhibits coalescence. Such inhibition is not present in a dispersion.

The stability of the emulsion is controlled by the type and amount of surface-active agents and/or finely divided solids. which commonly act as emulsifying agents or emulsifiers. As shown in Fig. 19.1, these emulsifying agents form interfacial films around the droplets of the dispersed phase and create a barrier that slows down or prevents coalescence of the droplets.

The matrix of an emulsion is called the external or continuous phase. The portion of the emulsion that is in the form of small droplets is called the internal, dispersed, or discontinuous phase. The emulsions considered in this chapter consist of crude oil and water or brine produced with it. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join petroleum courses in Rawalpindi.

The Basic Features and Considerations of Scaffolding

Scaffolding is one of the most prominent components that form part of any industrial or construction project. Irrespective of the scale of the project, scaffolding happens to be an essential structure that is erected for a variety of different purposes during the development process. Technical Data used in the field explained in petroleum courses in Islamabad.

In its essence, scaffolding is a rudimentary structure which can be used for many different purposes. It can be seen erected during repair and maintenance work especially in large and elevated structures. This is why it is extremely important to develop a comprehensive understanding of scaffolding. In order to ensure that you set up an appropriate structure, whether rented or purchased, for your construction project, you need to have a good understanding and in-depth knowledge about scaffolding. Some more details of petroleum courses in Islamabad are as under.

At the same time it is extremely important to take the various safety precautions into consideration when looking to make use of such a structure. As it is the construction industry is prone to mishaps and accidents related to the improper use of scaffolding structures and the downright failure to follow the required safety procedures.

Scaffolding erectors construct the structure out of wood or steel. Following the development of the framework a construction platform has to be placed at different elevations along the structure. This allows workers to access the strategic points easily in order to conduct the required work at a specific place.

Such a scaffolding structure is characterized by flat ends and the work courses which are necessary to construct in order to enhance support for the structure. This helps to provide stability to the worker's platform.

It is important to understand that even the independent scaffolding structure needs to be tied to the working site at different levels so that it remains stable throughout its height. The mobile scaffolding structures are distinctively different with respects to the fact that they are totally freestanding. They can be mounted on wheels or casters and moved from one location to another. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join petroleum courses in Rawalpindi.

Monitor Lifting Straps for Rigging Safety

It's important everyone involved in rigging is trained on safety procedures. You need to understand the limits of your lifting straps. Technical Data used in the field explained in petroleum courses in Islamabad.

If you are involved in any rigging in your current position, then you must understand how important it is to follow proper safety techniques. Rigging heavy items can be extremely dangerous if not done properly. It's often a good idea to train people directly and indirectly involved in the rigging process for the safety of the entire crew. Everyone should be trained on the limitations of equipment and lifting straps. You will want to ensure that the equipment does not become strained or compromised in any way.

Before you begin doing any rigging job, you will need to confirm that the load does not exceed the rated capacity. You should be conscious of the center of gravity to prevent your equipment from turning over. Be sure that everyone around you is aware of your intentions and where the load is expected to go. When possible, try to clear the area of other personnel. You can also communicate to others with hand signals as long as everyone is clear as to their meanings. While you are moving the load, avoid sharp objects or anything that could compromise your lifting straps. Some more details of petroleum courses in Islamabad  are as under.

When making overhead lifts, make sure everyone in the area wears hard hats. Lift the load very slowly. This will help prevent jarring items in your load and throwing the balance off. You may need to adjust the lifting strip as necessary to accommodate the load. Another important tip is to never leave your load unattended. You need to keep it in sight at all times. Leaving a load unattended can create a workplace hazard. Be sure to review these safety tips with other workers on a regular basis to ensure that everyone on the team is aware. It's important to hold people accountable if they do not follow safety guidelines. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join petroleum courses in Rawalpindi.

Procedure for Typical Measuring, Sampling, and Testing

The procedure given here is the API method currently in effect for running a field tank of crude oil. Since there are many variables that would alter this method, this procedure is applicable on/~) under specific conditions. Technical Data used in the field explained in petroleum courses in Islamabad.   The tank is vertical, no pressurized, fixed roof with side outlets, and it is to be gauged by the innate method. The oil is less than 100 seconds at 100°F (Saybolt universal viscosity) and is a liquid at atmospheric temperature and pressure.

 A cup case thermometer is used to read temperature of the oil in the tank.. A thief is used to obtain fluid samples from the tank.. The API gravity scale hydrometer test method is used to determine the API gravity of the oil; the temperature of the oil has to be near 60°F (* 5°F).. The water and sediment in the oil is to be determined by the centrifuge method with a 203-mm [8-in.] cone-shaped tube. Some more details of petroleum courses in Islamabad are as under.

The following outline gives the sequence of steps to betaken and the key points to be noted at each step. . Isolate the tank to be checked.. Use face mask and fresh air bottles if H2S hazard exists.

 Ground your body to stair railing or tank shell before reaching the top. This prevents static electrical discharge in a hazardous area. . Stand to the side of the hatch when opening to permit wind to blow gas away from face.. Measure temperature. Suspend thermometer in oil tank. Thermometer should be 12 in. or more from tank shell and must be immersed in oil for 5 minutes.

Use an ASTM-approved, wood-back or corrosion resistant metal cup case. If atmospheric temperature differs by more than 20°F from that of the liquid in the tank, the cup case should be given at least two preliminary immersions. Empty the cup case after each  immersion. Rapidly withdraw the thermometer and read and record the temperature to the nearest 1°F. Note: The number of temperature measurements varies with the depth of the liquid. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join petroleum courses in Rawalpindi.