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New Technologies for Progressing Cavity Pumps
by: Richard L. Adair, Ted Kramer — Added 6/11/2009 12:00:00 AMSWPSC - PC Pump General


Progressing cavity pumps have been used on an application-limited basis throughout the world for the past twenty years. A vast majority of these systems are deployed in Canada and South America, producing heavy, viscous oil with high sand content. Product development and numerous specialty ancillary products have most generally been tied to the heavy oil production. A few of the ancillary products such as spin-thru rod guides, torque anchors, heavy-duty wellhead drive, etc., transcend across application boundaries; however, the heavy oil market dominates most of the research and case studies.

This paper will focus on P C pump product enhancement and design changes for applications that are more typically encountered by US operators. These wells can be grouped into the following: secondary recovery, light oil, high water cut, high volume, or water source wells and coal bed methane applications. These wells require a different philosophy and certainly different pump geometries th

Tubingless PCP Application for Slimhole Wells
by: Norman W. Hein, Jr., Rick D. Himbury, James D. Brieden, Rick Adair — Added 6/11/2009 12:00:00 AMSWPSC - PC Pump General


The Sacatosa field is located in Maverick County, approximately 19 miles east of Eagle Pass, Texas. Production has been mainly limited to the San Miguel –1 reservoir. Conoco discovered this sandstone formation (1135 to 1768 feet deep) in December 1956.

Production wells were typically drilled using one string of 4 ½ inch, J55, 9.5 lb./ft. casing. Completion practices typically did not cement back to the surface. After many years of service, well casings have failed. It has been common practice to extend the productive life of these wells by cementing in 3-inch or 2 7/8-inch liners. However, 1.9-inch tubing is then required to run insert sucker rod pumps. Because of the thin wall thickness of this pipe, there have been numerous tubing failures. Additionally, after approximately 10 years after running a liner, a well typically starts to have liner failures.

A unique application of the progressing cavity pump (PCP) technology was tried in a well by running this equipment with

UPDATE ON COMPOSITE PROGRESSING CAVITY PUMPS
by: Steven Klein — Added 6/11/2009 12:00:00 AMSWPSC - PC Pump General


The newest technological advancement in the Progressing Cavity Pump (PCP) industry has been the development of composite stators and rotors. Included in this design concept is a reversing of the conventional elastomer-hard surface interface. The stator, in this design concept, is made of a hard composite material and is placed in a steel tube jacket. The rotor can be made of steel or composite material and coated with an even thickness of a soft and durable poly-urethane. The urethane offers increased wear resistance and mechanical properties over conventional elastomers and the even thickness offers additional performance enhancements. Also, the elastomeric placed on the rotor offers the well-servicing advantages of the wear element being located on the end of the sucker rod string rather than on the end of the tubing string. The composite PCP becomes a low cost, highly durable PCP that incorporates the emerging even thickness elastomer technology.

This paper discusses the laborat