One of the main wellbore problems in the Romashkinskoye field Deposits No. 301-303 is scaling of downhole pumping equipment. The operator has been successfully using liners made of scaled tubing that serve as scaling caltalysts. The effect can further be enhanced by chokes. This causes deposition of salts (scaling) on the liner itself, rather than on the downhole pumping equipment. For the recent 5 years, the number of workover operations dropped from 57 to 9.
References
1. Kashchavtsev V.E., Gattenberg Yu.P., Lyushin S.F., Preduprezhdenie soleobrazovaniya pri dobyche nefti (Prevention of scaling in oil production),
Moscow: Nedra Publ., 1985, 215 p.
2. Kashchavtsev V.E., Mishchenko I.T., Soleobrazovanie pri dobyche nefti (The scaling in oil production), Moscow: Orbita Publ., 2004, 432 p.
3. Utility patent no. 117966 RF, MPK E 21 V 43/00, Skvazhinnaya shtangovaya nasosnaya ustanovka (Downhole sucker rod pump unit), Inventors: Vanyurikhin I.S., Legaev Yu.N., Galiev F.A., Pishchaev D.V., Galimov R.R.
4. Utility patentno. 119041 RF, MPK F 04 B 47/02, E 21 V 43/00, Skvazhinnaya shtangovaya nasosnaya ustanovka dlya dobychi nefti v usloviyakh, oslozhnennykh
soleotlozheniem(Downhole sucker rod pump unit for oil production
under scaling), Inventors: Vanyurikhin I.S., Legaev Yu.N., Galiev F.A., Pishchaev D.V., Galimov R.R.
5. Utility patent no. 137939 RF, MPK E 21 V 43/08, Ulovitel' mekhanicheskikh primesey (Mechanical impurities catcher), Inventors: Vanyurikhin I.S., Klimin P.N., Legaev Yu.N., Nuriakhmetov L.N., Pishchaev D.V., Valeev L.M.
