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Victory platform workover operations in Area III hydraulic system design


Safety factor, to meet the work requirements derrick cylinder. Fuel tanks on the sliding track, select the check standard cylinder series: cylinder diameter D of a 125ram, piston rod diameter d: 90mm. Cylinder output force checking: The system working pressure of 22MPa; rod chamber output force 130kN,[link widoczny dla zalogowanych], fuel tank safety factor of 1.7; rod cavity output force 27okN, fuel tank safety factor of 3.6. Fuel tank on the vertical orbit shift, select: cylinder diameter D of a 250ram, piston rod diameter d = 160mm. Checking cylinder output force; system working pressure of 22MPa; rod chamber output force 630kN, fuel tank safety factor of 1.6; rod cavity output force lO7OkN,[link widoczny dla zalogowanych], fuel tank safety factor of 2.8. We can see from the above two calculations, the selected fuel tank contained in the derrick when there usually enough to overcome bias. (4) the calculation speed of the derrick to ensure synchronization, set the shunt valve assembly, movement speed by the flow control valve to adjust, move the vertical cylinder and the sliding cylinder with different specifications, which set up vertical and horizontal shift control valve shift the two speed control valve control valve to adjust the speed of the derrick to meet requirements. Derrick speed adjustment resulted in approximately 10 × 10 ~ m / s. Set flow rate Q for a 0.0005m. / S calculation of the maximum lateral movement speed: 19 No. 2, 51 offshore platform in China to promote the speed V * a == 2XlOm / s; driving speed of a-4.2XlO ... 2m / s. Similarly, the flow rate Q 10. O005 / m. / S, calculate the maximum speed of longitudinal movement: to promote the speed 1 of a 5 × 10 -. m / s; driving speed fine for a 8 × 10m / s if the vertical (or horizontal) speed settings are not satisfied, you can through vertical (or horizontal control valve to adjust. adjustment process must first control valve it is set value of zero, and then gradually adjusted from small to large, to prevent a sudden increase speed threshold, the derrick move faster, be dangerous. derrick set up mobile speed adjustment, should be locked, to prevent random operation or misuse. 3 system features through on-site applications, the characteristics of the system is mainly reflected in the following 6 points: (1) compact, saving installation space. platform workover area furnished with pipe yard, workover and traverse system, workover rig horizontal arrangement of moving except the base of DC motors, drive system, drawworks, rotary table, workover derrick and other equipment, but also furnished with BOP hydraulic control device, filling the hydraulic tank and the mast vertical and horizontal transfer station, due to the several parts of the hydraulic power source for integrated drives a hydraulic station, greatly reducing the installation space, to avoid a lot of hydraulic lines intertwined. (2) two-stage regulator. system design level regulator, a regulator for the 14MPa,[link widoczny dla zalogowanych], 22MPa were used for the secondary regulator in the workover, the hydraulic clamp and the mast vertical shift large sliding. workover system that meets the requirements of large flow pressure,[link widoczny dla zalogowanych], while high-pressure mobile systems to support the derrick low flow conditions. (3) the system overflow less heat. As a result of constant pressure variable piston pump, hydraulic system avoids the load devices for different heat generated by the phenomenon of flooding, power system equipment required only for the flow to the load. (4) to winter operations. consider the low temperature in winter at sea, before the start of the hydraulic system through the system configuration of the electric heater for the hydraulic oil tank is heated. (5) to facilitate maintenance and repair. workover platforms as ocean conditions and poor environmental conditions, so as to facilitate repair and maintenance, the hydraulic system in each loop have added a cut-off valve. Once a circuit fails, by closing the valve back on the road to troubleshoot, so that neither the leakage of hydraulic oil contamination does not affect the work of other circuits. (6) high reliability. To improve system reliability, the key hydraulic components such as: pumps, hydraulic cylinders, control valve, check valve and flow valve are all synchronized streaming set Rexroth hydraulic components selected. 4 Conclusion workover platforms work area for the well site equipment hydraulic drive more comprehensive design is necessary and reasonable,[link widoczny dla zalogowanych], not only reduce the investment cost, convenient space-saving layout and very easy to work and maintenance of the site. References Lei Tianjue editor. Hydraulic Engineering Handbook [ ,M], Machinery Industry Press, 1990.ThemultipurposehydraulicsystemontheNo.3ofShengliOperationwellwork-overPlatformLlDetang (DrillingtechnologyinstituteofShenglipetroleumbureau, Dongying, 257017China)
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