Tower Pumping Unit New Computerized Hydraulic Lifting System
Throughout the United States there are many oil and gas wells in danger of being plugged or abandoned. These mature wells, sometimes called “stripper wells,” could possibly be made economical again by employing a short testing and evaluation phase, then implementing a new pumping method that has recently been developed. This pumping method is designed as an alternative to conventional “rod and pump jack methods” utilized in oil well production today. Instead of rods to convey the up and down stroke of the downhole pump, cable is used. In place of pump jacks, an electronic and hydraulic operated system is used. Not only is the pumping method (using cable) unconventional, it offers many options and advantages that conventional pumping does not offer. This method has been under development and testing by Roy R. Vann, Sr. for approximately seven years. Field testing has been ongoing for four years at several locations in Texas and New Mexico. After the short testing phase and optimum pumping rate has been determined, the cable is connected to a computerized hydraulic lifting system. The size of the unit and the length of stroke will vary with the depth of the well and downhole well conditions. The tower pumping unit may be used on any well that uses a downhole reciprocating pump to move fluid from the formation to the surface. New Computerized Hydraulic Lifting System.
About the System
New vs old
Longer strokes than most pumpirg methods allows for fewer strokes per minute which allows for continuous tension in the lifting system. This feature plus having no rod couplings should cause less wear on the tubing. By pumping 24 hours a day, there may be some advantages.
When pumps stop , paraffin tends to form and solids that are in the fluid tend to drop back into and around pump barrel. Safer - no visible moving parts on surface equipment. "Enviromental Green" with a small footprint and a clean well site. Easier to move from one location to another.
- Eliminates washing off of cups on hold down tool by venting fluid through the dump valve.
- Easy to operate by pulling up against top of pump barrel.
- Can be run with conventional rod pumps or with wireline conveyed pumps.
- Venting is controlled by lifting the plunger to the top of the barrel and lowering to stop the venting when desired.
- Can spot chemicals or wash out flour sand from around the pump barrel.
- An advantage is the ability to spot chemicals between the pump barrel and tubing, which is usually a dead fluid area.
- It may be desired to melt paraffin by putting hot fluids down the tubing.
This vent valve allows fluids to enter the tubing at the top and exit at the bottom. The amount of fluid required is pumped into the top of the tubing. Vent valve is then closed by lowering pump barrel back to original position.