Assessment of the stressed state of the casing of the above-bit hydro-elevator

UDK: 622.24+621.694.2
Key words: oil well, ejection system, ejector pump, stressed state, stress concentration
Authors: D.A. Panevnik, A.S. Velichkovich (Ivano-Frankivsk National Technical University of Oil and Gas, Ukraine, Ivano-Frankivsk)

The authors analyzed distribution of flows in the elements of the pumping and circulating system of the well, what equipped by the above-bit hydro-elevator. It was determined that the most difficult conditions of use the hydro-elevator casing appear at its operation in cavitation condition. It is developed the method of selection of geometric parameters of the casing of the well ejection system with an external arrangement of multiple jet pumps.

We researched the stressed state of the casing of the above-bit hydro-elevator at work in the drill column. For obtaining analytical results the casing was simulated like the momentless shell with through holes. It is established that the presence of through holes in the casing considerably affect on its state of stress. Along with the ring stresses from the internal pressure of the action it was taken into account the effect of axial stresses from the weight of the drill column and tangential stresses from its torsion. To perform design calculations and evaluating the strength it was used Huber-Mises theory. It was suggested an engineering approach to the research of the strength of the casing areas attenuation by holes. Assessment of equivalent stress concentration effect in the vicinity of the holes it was realized by combining solutions of multi-parameter two-dimensional problem with the results of Kirsch problem. It was made a numerical analysis of the results on the example of a specific engineering task. It was obtained a graph of the maximum equivalent stresses in the casing from its geometrical parameters useful for designing or checking calculations.

The investigations made it possible to determine the allowable at specific conditions operating the ratio of the wall thickness and inner diameter of the casing of the device, taking into account the perturbation stresses in the area technological holes. The results can be used during the design and operation of wells ejection systems.

References

1. Sokolov E.Ya., Zinger N.M., Struynye apparaty (Jet devices), Moscow:

Energoatomizdat Publ., 1989, 352 p.

2. Marenko V.P., Mironov S.D., Mishchenko I.G., Tseplyaev Yu.A., Primenenie

struynykh nasosov dlya podema produktsii skvazhin (The use of jet

pumps for well production lifting), Neftepromyslovoe delo, 1986, 38 p.

3. Kamenev P.N., Gidroelevatory v stroitelstve (Hydraulic elevator in the

building), Moscow: Stroyizdat Publ., 1970, 415 p.

4. Velichkovich A.S., Panevnik D.O., Rationale for choosing the geometric

dimensions of well hydraulic jet pump (In Ukr.), Naftogazova galuz

Ukrani, 2013, no. 6, pp. 2023.

5. Mavlyutov M.R., Skvortsov V.P., Radionova S.V., Sergeev S.A., The effectiveness

of the differential pressure control by ejection (In Russ.), Neftyanoe

khozyaystvo = Oil Industry, 1998, no. 5, pp. 3940.

6. Iogansen K.V., Sputnik burovika (Driller satellite), Moscow: Nedra Publ.,

1986, 294 p.

7. Gere J.M., Goodno B., Mechanics of materials, Stamford: Cengage

Learning, 2012, 620 p.

8. Hahn H.G., Elastizit􀀀tstheorie. Grundlagen der linearen Theorie und Anwendungen

auf eindimensionale, ebene und r􀀀umliche probleme, B.G.

Teubner Stuttgart, 1985.

9. Dovbnya E.N., Krupko N.A., Influence of circular hole on the shell stress

state for arbitrary Gaussian curvature (In Russ.), Vestnik Permskogo natsionalnogo

issledovatelskogo politekhnicheskogo universiteta. Mekhanika

= PNRPU Mechanics Bulletin, 2014, no. 1, pp. 108125.References

1. Sokolov E.Ya., Zinger N.M., Struynye apparaty (Jet devices), Moscow:

Energoatomizdat Publ., 1989, 352 p.

2. Marenko V.P., Mironov S.D., Mishchenko I.G., Tseplyaev Yu.A., Primenenie

struynykh nasosov dlya podema produktsii skvazhin (The use of jet

pumps for well production lifting), Neftepromyslovoe delo, 1986, 38 p.

3. Kamenev P.N., Gidroelevatory v stroitelstve (Hydraulic elevator in the

building), Moscow: Stroyizdat Publ., 1970, 415 p.

4. Velichkovich A.S., Panevnik D.O., Rationale for choosing the geometric

dimensions of well hydraulic jet pump (In Ukr.), Naftogazova galuz

Ukrani, 2013, no. 6, pp. 2023.

5. Mavlyutov M.R., Skvortsov V.P., Radionova S.V., Sergeev S.A., The effectiveness

of the differential pressure control by ejection (In Russ.), Neftyanoe

khozyaystvo = Oil Industry, 1998, no. 5, pp. 3940.

6. Iogansen K.V., Sputnik burovika (Driller satellite), Moscow: Nedra Publ.,

1986, 294 p.

7. Gere J.M., Goodno B., Mechanics of materials, Stamford: Cengage

Learning, 2012, 620 p.

8. Hahn H.G., Elastizit􀀀tstheorie. Grundlagen der linearen Theorie und Anwendungen

auf eindimensionale, ebene und r􀀀umliche probleme, B.G.

Teubner Stuttgart, 1985.

9. Dovbnya E.N., Krupko N.A., Influence of circular hole on the shell stress

state for arbitrary Gaussian curvature (In Russ.), Vestnik Permskogo natsionalnogo

issledovatelskogo politekhnicheskogo universiteta. Mekhanika

= PNRPU Mechanics Bulletin, 2014, no. 1, pp. 108125.

The authors analyzed distribution of flows in the elements of the pumping and circulating system of the well, what equipped by the above-bit hydro-elevator. It was determined that the most difficult conditions of use the hydro-elevator casing appear at its operation in cavitation condition. It is developed the method of selection of geometric parameters of the casing of the well ejection system with an external arrangement of multiple jet pumps.

We researched the stressed state of the casing of the above-bit hydro-elevator at work in the drill column. For obtaining analytical results the casing was simulated like the momentless shell with through holes. It is established that the presence of through holes in the casing considerably affect on its state of stress. Along with the ring stresses from the internal pressure of the action it was taken into account the effect of axial stresses from the weight of the drill column and tangential stresses from its torsion. To perform design calculations and evaluating the strength it was used Huber-Mises theory. It was suggested an engineering approach to the research of the strength of the casing areas attenuation by holes. Assessment of equivalent stress concentration effect in the vicinity of the holes it was realized by combining solutions of multi-parameter two-dimensional problem with the results of Kirsch problem. It was made a numerical analysis of the results on the example of a specific engineering task. It was obtained a graph of the maximum equivalent stresses in the casing from its geometrical parameters useful for designing or checking calculations.

The investigations made it possible to determine the allowable at specific conditions operating the ratio of the wall thickness and inner diameter of the casing of the device, taking into account the perturbation stresses in the area technological holes. The results can be used during the design and operation of wells ejection systems.

References

1. Sokolov E.Ya., Zinger N.M., Struynye apparaty (Jet devices), Moscow:

Energoatomizdat Publ., 1989, 352 p.

2. Marenko V.P., Mironov S.D., Mishchenko I.G., Tseplyaev Yu.A., Primenenie

struynykh nasosov dlya podema produktsii skvazhin (The use of jet

pumps for well production lifting), Neftepromyslovoe delo, 1986, 38 p.

3. Kamenev P.N., Gidroelevatory v stroitelstve (Hydraulic elevator in the

building), Moscow: Stroyizdat Publ., 1970, 415 p.

4. Velichkovich A.S., Panevnik D.O., Rationale for choosing the geometric

dimensions of well hydraulic jet pump (In Ukr.), Naftogazova galuz

Ukrani, 2013, no. 6, pp. 2023.

5. Mavlyutov M.R., Skvortsov V.P., Radionova S.V., Sergeev S.A., The effectiveness

of the differential pressure control by ejection (In Russ.), Neftyanoe

khozyaystvo = Oil Industry, 1998, no. 5, pp. 3940.

6. Iogansen K.V., Sputnik burovika (Driller satellite), Moscow: Nedra Publ.,

1986, 294 p.

7. Gere J.M., Goodno B., Mechanics of materials, Stamford: Cengage

Learning, 2012, 620 p.

8. Hahn H.G., Elastizit􀀀tstheorie. Grundlagen der linearen Theorie und Anwendungen

auf eindimensionale, ebene und r􀀀umliche probleme, B.G.

Teubner Stuttgart, 1985.

9. Dovbnya E.N., Krupko N.A., Influence of circular hole on the shell stress

state for arbitrary Gaussian curvature (In Russ.), Vestnik Permskogo natsionalnogo

issledovatelskogo politekhnicheskogo universiteta. Mekhanika

= PNRPU Mechanics Bulletin, 2014, no. 1, pp. 108125.References

1. Sokolov E.Ya., Zinger N.M., Struynye apparaty (Jet devices), Moscow:

Energoatomizdat Publ., 1989, 352 p.

2. Marenko V.P., Mironov S.D., Mishchenko I.G., Tseplyaev Yu.A., Primenenie

struynykh nasosov dlya podema produktsii skvazhin (The use of jet

pumps for well production lifting), Neftepromyslovoe delo, 1986, 38 p.

3. Kamenev P.N., Gidroelevatory v stroitelstve (Hydraulic elevator in the

building), Moscow: Stroyizdat Publ., 1970, 415 p.

4. Velichkovich A.S., Panevnik D.O., Rationale for choosing the geometric

dimensions of well hydraulic jet pump (In Ukr.), Naftogazova galuz

Ukrani, 2013, no. 6, pp. 2023.

5. Mavlyutov M.R., Skvortsov V.P., Radionova S.V., Sergeev S.A., The effectiveness

of the differential pressure control by ejection (In Russ.), Neftyanoe

khozyaystvo = Oil Industry, 1998, no. 5, pp. 3940.

6. Iogansen K.V., Sputnik burovika (Driller satellite), Moscow: Nedra Publ.,

1986, 294 p.

7. Gere J.M., Goodno B., Mechanics of materials, Stamford: Cengage

Learning, 2012, 620 p.

8. Hahn H.G., Elastizit􀀀tstheorie. Grundlagen der linearen Theorie und Anwendungen

auf eindimensionale, ebene und r􀀀umliche probleme, B.G.

Teubner Stuttgart, 1985.

9. Dovbnya E.N., Krupko N.A., Influence of circular hole on the shell stress

state for arbitrary Gaussian curvature (In Russ.), Vestnik Permskogo natsionalnogo

issledovatelskogo politekhnicheskogo universiteta. Mekhanika

= PNRPU Mechanics Bulletin, 2014, no. 1, pp. 108125.



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