ALRDC Technical Library

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Adjustable Valve Rod and Pull Tube Guide for Downhole Sucker Rod Pumps
by: Mark Mahoney — Added 6/12/2009 12:00:00 AMSWPSC - BP Downhole Equipment


The Adjustable Valve Rod and Pull Tube Guide is designed to allow for precise spacing in a down-hole sucker rod pump. In historical installations the spacing is based on the valve rod or pull tube length. This length is usually in one inch increments from the factory, or the rod or tube is field cut and threaded to maximize the pump compression ratio. This patented guide allows the spacing to be adjusted with greater precision and will compensate for manufacturing tolerances and reduce field cutting and threading of pull rods and pull tubes.

This paper will describe how the guide is designed, its specific applications and its advantages over conventional sucker rod and pull tube guides.

Beam Pump Rod Buckling and Pump Leakage Considerations
by: Henry Nickens, James Lea, James C. Cox — Added 6/12/2009 12:00:00 AMSWPSC - BP Downhole Equipment


New results have appeared for downhole pump slippage predictions from fairly recent test data. Additional testing is in progress. A pump with large plunger/barrel clearances will slip more fluid. A pump with smaller clearances will slip or leak less but a tighter fit will tend to increase rod buckling at the pump to a greater degree.

Considerations for pump leakage and example calculations are presented using the older and the new pump slippage relationships. Also the effect of pump clearances on possible buckling are studied. Further additional possible causes of rod buckling are presented and discussed and compared. The results will help the reader to decide on how to size pump clearances to provide leakage for lubrication in the pump without losing too much pump efficiency. Several ideas on the source of rod buckling are presented and compared, and the reader should be left with some review of older ideas and some newer concepts on how to combat rod buckling in the operation of

Downhole Gas Separators - A Laboratory and Field Study
by: Jim McCoy, Lynn Rowlan, John Patterson, Tony Podio, Omar Lisigurski — Added 9/20/2009 12:00:00 AMSWPSC - BP Downhole Equipment


Downhole gas separators are often the most inefficient part of a sucker rod pump system. This paper presents laboratory data on the performance of 5 different gas separator designs. Continuous flow and intermittent flow were studied. Field data is presented on one of the designs. The field data indicates that success or failure of the gas separator is dependent upon the fluids and wellbore pressures as well as the mechanical design of the gas separator. Successful and unsuccessful examples of gas separator performance in the field are shown along with field fluid data properties. Videos will be shown at the presentation of the continuous and intermittent flow of water and air through the transparent gas separators placed in transparent casing.

Evaluation of Sucker Rod Pump for Sand and Gas Problems in the "Faja Petrolifera Del Orinoco", Venezuela
by: Efren Quijada, Reinaldo Figuera, Carlos Brunings — Added 9/20/2009 12:00:00 AMSWPSC - BP Downhole Equipment


This Sucker Rod Pump has a short primary plunger with a long barrel and hollow tube that slides inside a short barrel; the availability of a superior traveling valve turns the equipment into a double stage pump. A pressure compensating bushing connects the primary plunger and hollow tube. From the bushing connection to the end of the long barrel an annular space exists where the gas is compressed on the upstroke and the sand and gas is forced to move instead of settling. During the evaluation of this technology 15 equipments were installed in wells from 8-11 °API in Petroleos de Venezuela, in the Eastern Division. A considerable diminution of: GOR, interference by gas and the effect gas lock were observed. Production increase on an average of 30% per well after the installation of this type pump.

Harbison-Fischer Sand-Pro Sucker Rod Pump for Downhole Fluid Production with High Percentages of Sand or Other Particulates
by: Benny J. Williams — Added 9/20/2009 12:00:00 AMSWPSC - BP Downhole Equipment


The Harbison-Fischer patent-pending Sand-Pro? sucker rod pump has been successfully field-tested in some of the toughest sand production conditions and has increased the run times over previous pumps of all types. The theory of the pump will be discussed and field applications will be described. Questions and discussion from the attendees will be encouraged.

New Sucker Rod Pump for Fluid and Gas Production, Gas Vent Pump
by: Benny J. Williams — Added 9/20/2009 12:00:00 AMSWPSC - BP Downhole Equipment


This paper will describe a new, patent pending sucker rod pump for gas separation and fluid/gas production. The Gas Vent Pump? utilizes a new concept of gas separation that is separated from the pumping action of the sucker rod pump. This is an “open” system type of sucker rod pumping, which is more efficient with respect to gas separation than previous methods. The theory of operation will be detailed and case studies will be shown to demonstrate the applications for the Gas Vent Pump.

Progress Report #4 on "Fluid Slippage in Down-Hole-Rod-Drawn-Oil Well Pumps"
by: John Patterson, Ralph Harding, Benny Williams, Mike Brock, Kyle Chambliss, Jim Curfew, Lynn Rowlan, Ken Nolen — Added 9/20/2009 12:00:00 AMSWPSC - BP Downhole Equipment


This paper will present the results of the last down-hole-rod-drawn pump fluid slippage testing recently completed at the Texas Tech test well (Red Raider #1). This is # 4 in the series which began with laboratory testing presented in 1998. This paper will present an update to the empirical equation which will estimate down-hole fluid slippage over a range of pump sizes, clearances and strokes per minute (SPM).

Pump Slippage Test Update
by: Kyle Chambliss, Jim Curfew, John Patterson, Ralph Harding, Mike Brock, Lynn Rowlan, Ken Nolen, Paulus Adisomarta — Added 9/20/2009 12:00:00 AMSWPSC - BP Downhole Equipment


Pump slippage is an important part of the operation of a rod pumped well. A number of companies along with Texas Tech University have been conducting research on pump slippage in order to better understand the factors that effect slippage and derive a new slippage formula. This research was performed using the Red Raider # 1, a 4006’ test well operated by Texas Tech. This presentation will be an update on what has been learned so far during the slippage test

QP2 CAGE DEVELOPMENT - A CASE HISTORY
by: Reg Prostebby, Bob Ciarla, Saul L. Tovar — Added 9/20/2009 12:00:00 AMSWPSC - BP Downhole Equipment


The developoment of a new cage for bottomhole sucker rod pumps was initiated by Oxy Petrolem to solve prematrue failures of existing cages in their water flood fields. Oxy approached Quinn’s with the purpose of designing a cage in the Wasson/Clearforks area.

After reviewing the wells, Quinn’s designed a new cage that is a one piece cage, can handle an alternate pattern ball, have better flow characteristics with less pressure drop than any existing cages, and handle deep, corrosive well conditions.

Quinn’s utilized their finite element anaylysis software to design this new cage. The QP2 cages were built, ran and tested. Quinn’s also successfully developed interim cages that achieved longer run lives while develping the QP2 cage.

This paper will expand on the design process that was undertaken to fulfill Oxy’s request for a better cage and also verify the design criteria.

SIX YEARS OF BEST PRACTICES IN THE PRESTON SPRABERRY UNIT
by: Scott W. Long, Elton J. Smith, Charlie R. Hoff, Albert S. Garza, Paul Treadwell, Johnny Bunsen — Added 6/10/2009 12:00:00 AMSWPSC - BP Downhole Equipment


This paper is an update of a Southwestern Petroleum Short Course paper presented in 1999. This update presents four years of additional performance from this ongoing “Best Practices” Program.

In the 1999 paper after two years of the “Best Practices” Program, performance (FPWPY) was as follows:
Tubing Leaks Reduced 61 %
Rod Parts Reduced 35 %
Pump Repairs Reduced 6 %

After 6 years of the “Best Practices” Program, performance (FPWPY) is as follows:

Tubing leaks Reduced 85 %
Rod Parts Reduced 50 %
Pump Repairs Reduced 67 %

This paper provides the additional failure reduction processes initiated since the 1999 SWPSC paper. This paper will also show the impact of implementing a field wide “Best Practices” program. This paper demonstrates the benefits of an ongoing performance database to project and evaluate future performance.

Summary of Testing of Variable Slippage Pump (VSP) for Gas Locking
by: Benny J. Williams — Added 6/9/2009 12:00:00 AMSWPSC - BP Downhole Equipment


The Harbison-Fischer Variable Slippage Pump, (VSP), has been field tested since December 1999 in wells located primarily in West Texas and New Mexico. Results have been favorable in gas locking conditions by eliminating gas locking, and increasing gas production in some wells. This paper will review the test data and the characteristics of these wells. It will also describe the fundamentals of this method of artificial lift, and present what was learned about pump component selection and downhole applications.

The Panacea Pump Tool
by: Robert M. Parker, Jason Wacker, Brock Watson, Jonathan Dimock — Added 6/9/2009 12:00:00 AMSWPSC - BP Downhole Equipment


Gas interference and sand production are two of the biggest challenges for operators of sucker-rod pumped wells in southeast New Mexico’s Delaware Basin. This paper will discuss the re-application of an old sucker-rod pump tool that solves both of these problems. The Panacea Pump Tool, which can be installed on rod pumps with pin threaded barrels at any time, consists of a hollowed out rod-pump extension coupling. A cavity created by the tool maintains a minimum liquid level in the pump barrel, which reduces gas interference. The cavity also provides continual cleaning of particle buildup from iron sulfide and sand that can wear on a pump’s plunger, similar to stroke through pump designs. Pump off control has been critical to the resurrection of this technology. Numerous, repeatable successes in some of Texaco’s toughest producing environments have made the Panacea Pump Tool the pump upgrade of choice.

Troubleshooting the Bottomhole Pump - A Practical Approach
by: Reg Prostebby — Added 9/20/2009 12:00:00 AMSWPSC - BP Downhole Equipment


The bottomhole sucker rod pump, is the workhorse of artificial lift around the world. If the bottomhole sucker rod pump becomes fouled, the oil company is losing revenue. Prior to calling the service rig, this paper will provide a series of pracatical procedures to tyr BEFORE the service company is called. The goal is to restore pump function and return production to normal, while keeping lifting cost down.

Update of Field Applications for 100 Installed Variable Slippage Pumps™ for Gas Locking Conditions
by: Benny Williams — Added 6/13/2009 12:00:00 AMSWPSC - BP Downhole Equipment


The Variable Slippage Pump? for gas locking conditions has completed almost two years of field applications. The theory of the pump will be described and field application data will be presented for more than 100 installations to describe the implementations. “Lessons learned” will be presented and successes will be described and quantified. Questions and discussion will be encouraged from the attendees.