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• W4237444890 abstract "Patented Innovations in Casing Plungers Increase Production in Marginal Oklahoma Panhandle Wells Robert Lesley Moore; Robert Lesley Moore R&A Moore Inc Search for other works by this author on: This Site Google Scholar Windel Mayfield Windel Mayfield Search for other works by this author on: This Site Google Scholar Paper presented at the SPE Production Operations Symposium, Oklahoma City, Oklahoma, April 2005. Paper Number: SPE-94016-MS https://doi.org/10.2118/94016-MS Published: April 16 2005 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Moore, Robert Lesley, and Windel Mayfield. Patented Innovations in Casing Plungers Increase Production in Marginal Oklahoma Panhandle Wells. Paper presented at the SPE Production Operations Symposium, Oklahoma City, Oklahoma, April 2005. doi: https://doi.org/10.2118/94016-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE Oklahoma City Oil and Gas Symposium / Production and Operations Symposium Search Advanced Search ABSTRACTThe unreliability of casing plungers has diminished their appeal as an effective solution for removing accumulated well bore fluids that severely curtail production in marginal stripper wells. For decades, the primary cause of failure points to the sealing cup design and the adverse reactions of cup material to well bore conditions. A new cup design and mechanical innovations restore the appeal of casing plungers as a reliable tool to increase production in a broad range of marginal well conditions. Production increases, extended cup life, and reduced operating expenses have been achieved.INTRODUCTION.The concept of casing plungers is appealing and simple. A tool with elastomeric cups is dropped to the bottom of a well bore. Gas and well bore fluids pass through the tool on descent and the flow is cut off at the bottom of the well. The elastomeric cups engage the casing wall in such a way as to provide an effective seal with the casing wall. Once the flow through the tool ceases, and because the cups are sealed against the casing wall, reservoir pressure begins toincrease underneath the tool. When the pressure force beneath the tool exceeds the weight of the tool, the friction of the cups, the weight of the fluid column, and the surface gathering system pressure, the tool will begin to ascend to the top of the well. At several times, depending on the reservoir characteristics, the tool may reach an equilibrium of pressures forces above and below the tool and come to rest until an excess of pressure force beneath the tool once again enables the tool to ascend. Thus, as the tool ascends, accumulated well bore fluids are efficiently removed from the well and an improved production cycle occurs as fluids pass through surface separation equipment and gas enters the sales pipeline. This concept issimple, attractive, and encouraging as an efficient, low cost, artificial lift solution for marginal stripper wells in the Oklahoma Panhandle, or elsewhere. However, simple and appealing theory meets many formidable foes on the battlefields of successful applications.HISTORY.The simple and appealing theory of casing plungers ran headlong into a number of problems. Often, the sealing cupsfailed in the midst of production cycles. The elastomeric compounds experienced adverse reactions to the chemicals of well bore fluids and conditions. The tool would hang up on descent and abort the production cycle. The reliability of performance was sporadic and frustrating.If only a reliable casing plunger could be developed, then a number of obvious advantages were readily observable. Foremost, the reservoir energy is effectively conserved and utilized fully to recover accumulated well bore fluids. In this way oil and gas production and water removal approach optimum conditions. Since the daily volumes of fluids produced are generally a few barrels per day, the normal use of rod pumps and pumping units to remove such small volumes of fluid are extremely ineffective with excessively high lifting costs per barrel.Reliable casing plungers will free such assets for re-assignment or salvage. In addition, the energy costs of the prime mover, whether natural gas or electricity, can now be added to the positive cash flow.Reliable casing plungers will be environmentally attractive by substantially reducing the volume of natural gas vented to the atmosphere. An old practice, now in disfavor, attempted to remove well bore fluids with the aid of surfactants (liquid soap and soap sticks)by blowing the well head gas stream to the stock tank (atmosphere). Not only was this inefficient as a means of fluid removal, it further aggravated the fluid saturation around the well bore perforations and essentially reduced the productive life of the well. Even many tubing plunger applications employ a vent valve that opens to the stock tank in the midst of a production cycle to maintain the velocity required to lift fluids with tubing plungers. Keywords: innovation, upstream oil & gas, drillstem/well testing, mechanical assembly, installation, compound, plunger increase production, well intervention, application, valve Subjects: Casing and Cementing, Artificial Lift Systems, Formation Evaluation & Management, Casing design, Plunger lift, Drillstem/well testing, Well Intervention This content is only available via PDF. 2005. Society of Petroleum Engineers You can access this article if you purchase or spend a download." @default.
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• W4237444890 title " Patented Innovations in Casing Plungers Increase Production in Marginal Oklahoma Panhandle Wells " @default.
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