Sand jet perforating (SJP) is currently gaining acceptance in unconventional resource plays where horizontal development has shown the need for methods to perforate these formations. This paper examines a new design for a tool assembly that allows fluid to flow through the sand jet perforator while operating a PDM (Positive Displacement Motor) with a mill or cutting tool. In multi-stage fracturing operations where through tubing mills are often used for cleanout runs prior to perforating, the flow isolation tube assembly can be added to the tool string to achieve cleanout in conjunction with perforating in one trip. The design allows an operator to isolate the SJP tool, which is resident in the work string and perforate casing and formation, then restore flow to the PDM to continue operations such as milling or further well cleanoutall in a single trip.Discussion of the assembly design process and laboratory testing results are included as a part of the paper and will analyze the effectiveness of the technology and tools as well as the economic impact of this type of program. Economics includes process costs as well as cost savings from support equipment that is gained by the combination of operations. The program's translation to other shale plays like the Marcellus, Bakken, and Haynesville are also discussed.Shale plays dominate domestic drilling as well as production today and being able to combine completion operations to save both time and money is of interest to all producers. Using the flow isolation tube assembly will save cost and wear for coil tubing units as well as costs for other surface support equipment. Finally, safety is increased and the quality of the perforations is improved with SJP; giving a better perforating job for a lower cost.
Aberdeen Proving Ground, Maryland 21005 13. NUMBER Oi PAGES 14. MONITOR:NG AGENCY NAME & ADORESS(il dliferent froa: Controlllng Offica) 15. SECURITY CLASS. (of this report) UNCLASSI FIED 15s. DECLASSIFICATiON/DOWNGRAOING SCHEOULE. 16. DISTRIaUTION STATEMENT (of this R4oti) Approved for public release; distribution unlimited. I7. DISTRIBUTION STATEMENT (of the abstract entered in Blfuck 20, If diiarent from Report) It. SUPPLEMENTARY NOTES It. KEY WORDS (Continue on reverse aide It neceaay and identify by block number) Muzzle Gas Flow Unsteady Gas Dynamics tiATIOA TECHINICAL Numerical Analysis rlorATION FrPV'CE 1-VA ;I I i0. APSTRACT (Conltnue out revers, side t nI.ecea sy and Identify by block number) A numerical technique for the simulation of the time dependent, axisynretrlc flow of muzzle gases exiting a gun barrel with the attendent flow of ambient air is described. The technique is based on modifications to the OIL Eulerian hydrodynamics computer program to include treatn*t of arbitrary fixed and moving solid boundaries. This capability permits the inclusion of complexn muzzle device geometry and a moving projectile in the Eulerian finite difference mesh. FORM 1 7 DTO rIN V6 9O S L T DD IJAN73 73 3 EGITIOMOF 1NOV65 ISOL6Tz UNCLASSIFIED SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) UNCLASSIFIED SECURITY CLASSIICATION OF THIS PAOE(Whm Data Mnferid) 20. The computer program generated during the study is called SAMS (Small Arms Muzzle Simulator). Calculations, performed with the program, are presented for a-blunt projectile impulsively started from rest, and for M-16 grizzle gas flowfields. The muzzle blast calculations demonstrate the capabiliti, for calculating the complex interaction of the muzzle gases with a moving projectile and fixed boundaries. Computer generated plots are presented which show details of the expansion of the muzzle gases, generation of advancing shock wave in ambient air, blunt body shock in front of projectile and interaction of muzzle gases and air shock with the projectile. UNCLASSIFIED / & SECURITY CLASSIFICATION OF THIS PAGE(Wh#n Date Wntanfd) FOREW01RD The computer program development study described in this report was performed by the Los Angeles Division of Science Applications, Inc. for the U. S. Army Ballistic Research Laboratory under Contract DAADO5-73-C-0547 entitled, "Small Arms Muzzle Gas Flow Simulation." R. M. Traci was the principal investigator for the study and J. L. Farr contributed to the development of the numerical solution method and performed the computer program modifications. Consultant C. Y. Liu contributed to the development of the numerical technique, and Consultant W. E. Johnson aided in computer program modifications. The BRL technical monitor for the study was C. K. Zoltani.
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