The article presents a method for calculating plunger hanger to make it fit to cylinder after well workover. In general, the technique is based on the calculation of the effective plunger stripping. An example of calculating the plunger hanger for hypothetical well is given. It can be seen that proposed methodic allows to make possible the operation of the pump without a stroke both during the stabilizing the flow and during the operation at the steady flow. The calculations are based on a quasi-static model of mutual deformations of the rods and production strings, also considering the nature of alteration in deformations with the dynamic level lowering.
A technique for correcting the plunger, stripping which operates with the stroke to the inlet valve or pump casing, by the actual dynamogram is proposed. As a rule, plunger strokes are reflected as a “splash” shape of loads on the dynamogram at the end of the polished rod travel. This method allows, based upon extreme values of loads on the actual dynamogram, to calculate the value of the minimal distance, by which the depth of the plunger hanger should be altered, in order to exclude kicks.
The obtained results can be applied in design of wellwork, in particular for downhole operations of wells equipped with sucker rod pumps.
Reference
1. Agamalov G.B., Peculiarity of mechanized oil production from deep weels (In Russ.), Neftegazovoe delo, 2009, no. 2, pp. 64–67.
2. Urazakov K.R., Dmitriev V.V., Buranchin A.R.et al., Pump pipes deformation influence on rate of production and the interrepair period of wells (In Russ.), Neftegazovoe delo, 2009, no. 1, pp. 15–19.
3. Landau L.D., Lifshits E.M., Teoreticheskaya fizika (Theoretical physics), T. VII. Teoriya uprugosti (Theory of elasticity), Moscow: Fizmatlit Publ., 2003, 264 p.
4. Mishchenko I.T., Skvazhinnaya dobycha nefti (Oil production), Moscow: Neft’ i gaz Publ., 2007, 826 p.
5. Bakhtizin R.N., Urazakov K.R., Ismagilov S.F. et al., Dynamic model of a rod pump installation for inclined wells, SOCAR Proceedings, 2017, no. 4, pp. 74-82.
6. Urazakov K.R., Bakhtizin R.N., Ismagilov S.F., Topol'nikov A.S., Theoretical dynamometer card calculation taking into account complications in the sucker rod pump operation (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2014, no. 1, pp. 90–93.
7. Urazakov K.R., Ekspluatatsiya naklonno napravlennykh nasosnykh skvazhin (Operation of directional pumping wells), Moscow: Nedra Publ., 1993, 169 p.
8. Urazakov K.R., Bogomol'nyy E.I., Seytpagambetov Zh.S., Gazarov A.G., Nasosnaya dobycha vysokovyazkoy nefti iz naklonnykh i obvodnennykh skvazhin (Pumping of high-viscosity oil from inclined and watered wells), Moscow: Nedra Publ., 2003, 302 p.
9. Belov I.G., Issledovanie raboty glubinnykh nasosov dinamometrirovaniem (Investigation of well pumps work by dynamometry), Moscow: Gostoptekhizdat Publ., 1954, 128 p.
