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A back-pressure valve is a type of check valve, typically installed in the tubing hanger, to isolate the production tubing fluids to be pumped from above, as may be required for well-control purposes. Thus, it reduces downtime and operating cost by allowing BPV is commonly used during the nipple down and up of the drilling BOP stack, nipple up or down of Christmas* trees This article gives you some good practices and rules of thumb for optimizing beam pump applications. The following topics have been A good understanding of counterbalance is vital to the successful operation of surface su*ker rod pumping units The figure above represents a simple non-counterbalanced lever system. On the up-st*oke, by pulling down on the end of a beam, a man is lifting a bucket full of water having a combined weight of 150 lbs. Note that the upst*oke effort of the man is a substantial 150 lbs. This article helps understand the difference between Conventional & Mark II pumping units in term of production performance. SROD, the MF-1 is an oil well activated using a su*ker rod pump. The target rate is 500 BPD, the pump is set at 6000 ft, the plunger diameter is 1.5 inch, the rod string is 86, the st*oke length is 144 inch and the pumping speed is 13 spm. SROD, the predictive program from GE, has been used in order to compare the reducer torque performance of a conventional unit and a Mark II unit. The plots “Torque (in in-lbs) versus the crank angle” are depicted in the following graph. and describes the main specifications of an API subsurface pump. It is a nomenclature to clas*ify API su*ker rod pumps seven parts, separated by dashes. EXAMPLE: 20-125-RHBC-10-4-2-2 Each part, in order, describes the following specifications: