Self-releasing of threaded connection of a rod into a well
Authors: I.I. Ahmetzyanov (Oil and Gas Production Departmen Fedorovskneft, RF, Surgut), A.Sh. Yanturin (Geophysika NPF JSC, RF, Ufa), M.S. Gabdrakhimov (Oktyabrskiy Branch of Ufa State Petroleum Technological University, RF, Oktyabrskiy), R.A. Yanturin (Rostneftekhim CJSC, RF, Ufa)
Key words: well, rod, threaded connection.
This solution enables the choice of the mimimum acceptable values of the tightening of the threaded connection of a rod, when the total of frictions in threadings and shoulder bearing faces of rods and boxes exceeds the total of twisting strains from the spiral deformation of the column. At the same time this prevents accidents when the first (from the collar) engaged threads failure occurs.
References
1. Kruman B.B., Glubinnonasosnye shtangi (Sucker rods), Moscow: Nedra
Publ., 1977, 191 p.
2. Birger I.A., Iosilevich G.B., Rez'bovye soedineniya (Threaded connections),
Moscow: Mashinostroenie Publ., 1973, 256 p.
3. Junker G., Strelov D., Untersuchungen über die Mechanik des selbstätigen
Lösens und die ZweckmäBige Sickerung von Sehraubenverbindungen, Draht-Welt, 1966, V. 52, no. 2, 3, 5.
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