Pump Selection

The selection of a proper subsurface pump for the application is sometimes a point of conjecture. Technical Data used in the field explained in petroleum courses in Rawalpindi, The following recommendations generally are accepted as suitable for most applications.

API pump classifications. There are many variations of the pumps shown, some within the specifications of API and some that are non-API that will still perform the desired function of pumping oil to the surface.

A stationary-barrel rod pump with top seating hold down. This is a pump that is run into the well with the sucker rods. In this pump the plunger is attached to, and moves up and down with, the sucker-rod string. Some more details of petroleum courses in Rawalpindi are as under.

The barrel is held stationary at its top end by the seating assembly. The barrel is on the left and the plunger assembly is on the right. This is the preferred seating for the rod pump when possible. The top seating hold down provides a seal just below the cage, where the well fluid is discharged into the tubing, so sand or other solid particles are prevented from settling between the barrel and the tubing, and the pump is not apt to become stuck in the tubing by packed sand.

Tubing pumps have larger bores and correspondingly greater displacements for a given stroke length than rod pumps that can be used with the same size tubing. Therefore, tubing pumps commonly are used where it is necessary to lift large volumes of fluid and a pump of high displacement is required. A tubing pump has fewer working parts and is often lower in cost than a rod pump of corresponding size. However, the greater volume and resulting heavier fluid load may cause a loss in this advantage  by excessive sucker rod and tubing stretch. Also, the entire tubing string must be pulled to service the barrel of a tubing pump. 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 Islamabad.