| 2007 №05 (09) | 2007 №05 (11) |
The Paton Welding Journal, 2007, #5, 44-47 pages
Calculation of deposited layer thickness on components of oil-and-gas high-pressure valving
M.L. Zhadkevich1, E.F. Pereplyotchikov1, L.G. Puzrin1, A.V. Shevtsov2, M.N. Yavorsky3
1E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.2«IF ELTERM» company, Kiev, Ukraine
3SE «Ukrgazdobycha», Kiev, Ukraine
Abstract
Serviceability of the shut-off unit components of the direct-flow high-pressure production Christmas tree valves is ensured by deposition on their working surfaces of the chrome-nickel alloys, doped by carbon, boron and silicon, using the plasma-powder surfacing method. It is shown that for reliable operation of the shut-off units of these valves a layer of the deposited metal should have a guaranteed thickness. It is established that for operation at up to 70 MPa pressure minimum thickness of the deposited layer should be 1.5 mm, and allowing for a possible repeated grinding – up to 2.0 mm.
Keywords: plasma-powder surfacing, high-pressure valving, wear, direct-flow valves, shut-off unit components, concentration of stresses, deposited layer thickness
References
1. Vajsberg, G.L., Rimchuk, D.V. (2002) Flow safety: Questions. Answers. Kharkiv.2. Guliantz, G.M. (1991) Borehole blowout preventer equipment resistant to hydrogen sulphide: Refer. book. Moscow: Nedra.
3. Artemov, V.I., Kanakov, V.V., Maksymov, Yu.V. et al. (2001) Christmass tree for pressure up to 70 MPa. Naftova i Gazova Promyslovist, 3, 25–28.
4. Gurevich, D.F., Shpakov, O.N. (1987) Reference book of designer of pipeline fitting. Leningrad: Mashinostroenie.
5. Gladky, P.V., Pereplyotchikov, E.F., Rabinovich, V.I. (1970) Plasma cladding in power armature engineering. Moscow: NIIinformtyazhmash.
6. Pereplyotchikov, E.F. (2004) Plasma-powder cladding of wearand corrosion-resistant alloys in valve manufacturing. The Paton Welding J., 10, 31--37.
7. Shevtsov, V.L., Majdannik, V.Ya., Khanenko, V.M. et al. (2001) Production of Christmass tree for deep oilers and gassers by methods of electroslag casting and plasma-powder cladding. Svarshchik, 4, 8–9.
8. Bezukhov, N.I. (1968) Principles of theory of elasticity, plasticity and creep. Moscow: Vysshaya Shkola.
9. Knotek, O., Lugscheider, E., Eschnaner, H. (1975) Hartlegierungen zum Verschleiss. Duesseldorf: Schutz.
10. (1993) Resistance of materials to deformation and fracture: Refer. book. Part 1. Ed. by V.T. Troshchenko. Kiev: Naukova Dumka.
11. Tin Ming Wu (1964) Untersuchungen ueber das Auftragschweissen von gesenken fuer schmiedestuecke aus Stahl Forschungsberichte des Landes Nordrheih. No.1349. Westfalen.
12. Markovets, M.P. (1979) Determination of mechanical properties of metals by hardness. Moscow: Mashinostroenie.