DOI: https://doi.org/10.15587/1729-4061.2016.74831

Experimental research on the sealing ability of borehole packers

Maksym Dorokhov, Ivan Kostriba, Volodymyr Biletskyi

Abstract


With the use of a full factorial experimental design based on a Box­Hunter rotatable central composite plan for second order response surfaces, it was possible to obtain a statistical mathematical model of the impact of the diametrical tension, the test pressure, and the radial clearance between the thrust bush and the casing as well as the shear modulus of the material on the amount of contact pressure, which is represented by a polynomial of the second order. The research was carried out on the laboratory model of the PJSC “Ukrnafta” (Poltava, Ukraine). The analysis of this model shows that an essential impact on the sealing ability of the self­sealing ring (the value of contact pressure) is made by the following series of factors: the test pressure, the diametrical tension, the radial clearance, and the shear modulus of the compaction material. Moreover, the test pressure factor is characterised by nonlinearity, which manifests itself in intersections of the hypersurface response.

The study has experimentally determined the patterns of distributing contact pressure along the length of the conjugate surface between the ring and the casing, characterized by a decreasing contact pressure from the edge of the working bite to the supporting section of the ring.

The research has demonstrated that it is possible to manage directly the sealing ability of borehole packers, particularly by changing the geometric parameters of the packer compaction.

Keywords


borehole packer; self­sealing ring; contact pressure; blowout preventer; wellhead equipment; shear modulus

References


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Dorokhov, M. A. (2014). The research of mechanical properties of rubber seals downhole packer. Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas, 2 (37), 27–31. Available at: http://nbuv.gov.ua/UJRN/Nvif_2014_2_14

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Baart, P., Lugt, P. M., Prakash, B. (2014). On the Normal Stress Effect in Grease-Lubricated Bearing Seals. Tribology Transactions, 57 (5), 939–943. doi: 10.1080/10402004.2014.935120

Buyalich, G. D., Buyalich, K. G. (2014). Modeling of Hydraulic Power Cylinder Seal Assembly Operation. Proceedings of the Taishan Academic Forum – Project on Mine Disaster Prevention and Control. doi: 10.2991/mining-14.2014.26

Gölz, J., Bauer, F., Haas, W. (2014). Experimental Study on the Sealing Mechanism of Bidirectional PTFE Lip Seals. Tribology Transactions, 57 (5), 866–870. doi: 10.1080/10402004.2014.918236

Huang, Y., Salant, R. F. (2013). Simulation of the Effects of a Plunge Ground Rod on Hydraulic Rod Seal Behavior. Tribology Transactions, 56 (6), 986–996. doi: 10.1080/10402004.2013.807531

Belforte, G., Ivanov, A., Manuello Bertetto, A., Mazza, L. (2013). Experimental Method for Investigating Air Leakage in Rodless Cylinders. Experimental Techniques, 37 (3), 73–82. doi: 10.1111/ext.12039

Sukumar, T., Subramanian, M., Subramaniyan, S. K., Subramanian, N. (2015). Design and Optimization of Lip Seal for Air Braking System. SAE Technical, 8. doi: 10.4271/2015-26-0215

Myshkin, N., Kovalev, A., Spaltman, D., Woydt, M. (2014). Contact Mechanics and Tribology of Polymer Composites. Journal of Applied Polymer Science, 131 (3), 39870. doi: 10.1002/app.39870

Baart, P., Lugt, P. M., Prakash, B. (2009). Review of the lubrication, sealing, and pumping mechanisms in oil- and grease-lubricated radial lip seals. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 223 (3), 347–358. doi: 10.1243/13506501jet473

Cerhieiev, P. V., Biletskyi, V. S. (2016). Kompiuterne modeliuvannia tekhnolohichnykh protsesiv pererobky korysnykh kopalyn (praktykum). Skhidnyi vydavnychyi dim, 119.


GOST Style Citations


Boiko, V. S. Tlumachno-terminolohichnyi slovnyk-dovidnyk z nafty i hazu. Vol. 2 [Text] / V. S. Boiko, R. V. Boiko. – L'viv: „Apriori”, Mizhnarodna ekonomichna fundacija, 2006. – 800 p.

Dorokhov, M. A. The research of mechanical properties of rubber seals downhole packer [Text] / M. A. Dorokhov // Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas. – 2014. – Vol. 2, Issue 37. – P. 27–31. – Available at: http://nbuv.gov.ua/UJRN/Nvif_2014_2_14

Yakovlev, A. S. Yssledovanye raboty manzhetnykh uplotnytelei pakerov v rezhyme saomuplotnenyia [Text] / A. S. Yakovlev, S. S. Yakovlev // Stroytelstvo neftianykh y hazovykh skvazhyn na sushe y na more. – 2006. – Vol. 9. – P. 44–46.

Lediashov, O. A. Pakery dlia opressovky ustia skvazhyn typa POU [Text] / O. A. Lediashov, V. H. Nykytchenko, E. N. Shtakhov // Stroytelstvo neftianykh y hazovykh skvazhyn na sushe y na more. – 2008. – Vol. 1. – P. 25–27.

Rymchuk, D. V. Novi tekhnichni zasoby DP «LIKVO» dlia zabezpechennia fontannoi ta hazovoi bezpeky pid chas burinnia ta kapitalnoho remontu sverdlovyn [Text] / D. V. Rymchuk // Naftohazova haluz Ukrainy. – 2015. – Vol. 6. – P. 37–40. – Available at: http://nbuv.gov.ua/UJRN/ngu_2015_6_11

Baart, P. On the Normal Stress Effect in Grease–Lubricated Bearing Seals [Text] / P. Baart, M. Lugt, B. Procash // Tribology Transactions. – 2014. – Vol. 57, Issue 5. – P. 939–943. doi: 10.1080/10402004.2014.935120

Buyalich, G. D. Modeling of Hydraulic Power Cylinder Seal Assembly Operation [Text] / G. D. Buyalich, K. G. Buyalich // Proceedings of the Taishan Academic Forum - Project on Mine Disaster Prevention and Control. 2014. doi: 10.2991/mining-14.2014.26

Gölz, J. Experimental Study on the Sealing Mechanism of Bidirectional PTFE Lip Seals [Text] / J. Gölz, F. Bauer, W. Haas // Tribology Transactions. – 2014. – Vol. 57, Issue 5. – P. 866–870. doi: 10.1080/10402004.2014.918236

Huang, Y. Simulation of the Effects of a Plunge Ground Rod on Hydraulic Rod Seal Behavior [Text] / Y. Huang, R. Salant // Tribology Transactions. – 2013. – Vol. 56, Issue 6. – P. 986–996. doi: 10.1080/10402004.2013.807531

Belforte, G. Experimental Method for Investigating Air Leakage in Rodless Cylinders [Text] / G. Belforte, A. Ivanov, A. Manuello Bertetto, L. Mazza // Experimental Techniques. – 2013. – Vol. 37, Issue 3. – P. 73–82. doi: 10.1111/ext.12039

Sukumar, T. Design and Optimization of Lip Seal for Air Braking System [Text] / T. Sukumar, M. Subramanian, S. K. Subramaniyan, N. Subramanian // SAE Technical Paper. – 2015. – P. 8. doi: 10.4271/2015-26-0215

Myshkin, N. Contact Mechanics and Tribology of Polymer Composites [Text] / N. Myshkin, A. Kovalev, D. Spaltman, M. Woydt // Journal of Applied Polymer Science. – 2014. – Vol. 131, Issue 3. doi: 10.1002/app.39870

Baart, P. Review of the lubrication, sealing, and pumping mechanisms in oil– and grease–lubricated radial lip seals [Text] / P, Baart, P.M. Lugt, B. Prackash // Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology. – 2009. – Vol. 223, Issue 3. – P. 347–358. doi: 10.1243/13506501jet473

Cerhieiev, P. V. Kompiuterne modeliuvannia tekhnolohichnykh protsesiv pererobky korysnykh kopalyn (praktykum) [Text] / P. V. Cerhieiev, V. S. Biletskyi. – Skhidnyi vydavnychyi dim, 2016. – 119 p.






Copyright (c) 2016 Maksym Dorokhov, Ivan Kostriba, Volodymyr Biletskyi

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ISSN (print) 1729-3774, ISSN (on-line) 1729-4061