Rod Pump Performance in Heavy Oil Applications
Rod Pump Performance in Heavy Oil Applications
(OP)
Can anyone help me find information on problems that arise and changes that need to be made in rod pumping system designs for heavy oil (high viscosity) applications?





RE: Rod Pump Performance in Heavy Oil Applications
Thanks!
Pete
RE: Rod Pump Performance in Heavy Oil Applications
Also, ensuring adequate fillage of the pump is very important, as the inflow rate is normally not as great as lower vis. fluids. Therefore, a slower stroke rate is recommended.
There can also be significantly greater sand production in heavy oil applications as well, and the resulting abrasion can be challenging. This depends on volume of sand, "angularity" of the sand grains and grain composition.
RE: Rod Pump Performance in Heavy Oil Applications
For heavier crudes Progressive Cavity Pumps may be a better bet if you are at the front end of the develpoment or are experiencing repetative failures / problems with the rod pumps.
all the best
dadfap
RE: Rod Pump Performance in Heavy Oil Applications
There are a number of other factors to consider as well; water cut, oil composition, GOR, fluid level, et. al.
PC pumps will be harder on your tubing, as the rods tend to spin in one spot. This may be an issue if you have a badly deviated well.
RE: Rod Pump Performance in Heavy Oil Applications
PC pumps are still a viable option in a deviated well as they can now be driven using a standard ESP motor.
There is the addition of two components 1. gear reducer, 2. flex shaft to isolate the eccentric motion of the PC pump from the motor.
Go look at http://www.centrilift.com/PCPS/default.htm and you will get some idea. Admittedly they are not cheap, but if you are continually fishing rods or working over the well because of the deviation, they provide another alternative to you.
All the best
dadfap