Ground BOP control device 1. Overview ground BOP control device (hereinafter referred to as the control device) is an important device control wellhead and BOP stack hydraulic throttle valve kill, drilling, blowout indispensable device to prevent workover operations. Proper use and maintenance of the control system is very important. The use of manual control device did not make provisions for the repair and scrapped, but that does not mean that the use of the control device can be used indefinitely. Users and maintenance personnel should control device is in need of repair, overhaul or scrap to make appropriate judgments. 2. Model Description: Ground BOP control system models expressed as follows (in FKQ320-4 as an example): FK: ground BOP control device product code Q: Remote Control Type (Q for pneumatic fluid type, no remote control when the vacancy) 320 : the total volume of the accumulator (in this case 320L) 4: control object number (in this case 4) B: the number of structural improvement (second improvement) 3. The main technical parameters: System Nominal: 21 MPa 3000 psi maximum working pressure: 34.5MPa 5000psi system voltage range: 0 ~ 14 MPa 0 ~ 2000 psi nitrogen pressure accumulator: 7 ± 0.7 MPa 1000 ± 100 psi pressure control tune is given range: 19 ~ 21 MPa 2700 ~ 3000 psi hydraulic and pneumatic switch adjustment setting range: 17.5 ~ 21MPa 2500 ~ 3000 psi air pressure: 0.65 ~ 0.8 MPa 93 ~ 115 psi Power: 380 ± 19 V / 50Hz Ambient temperature: -13 ~ 40 ℃ Note: You need a special order exceeds these specifications. The structure and characteristics FKQ series ground BOP control device consists of the following components: a remote console (generally equipped with a protective housing) driller console air tube cable hydraulic lines (hoses or pipes bent wire, closed elbow and other hard-line, take ordering instructions) FK series of ground BOP control device consists of the following components: a remote console (generally equipped with a protective housing) hydraulic lines (hoses or pipes bent wire, pipe and other hard-line closure When required ordering instructions) according to customer requirements, and some models can increase the following functions: alarm nitrogen pressure compensation device backup system ground BOP control layout and connecting device shown in Figure 1. Note: The composition of the ground BOP control device will vary depending on the range of customer orders. 4.1 Remote Console Remote Console from the base, tanks, pumps, accumulators, manifold, various valves, instrumentation and electrical control boxes and other components. The main function of the remote control console is to produce a high pressure fluid from pump and stored in the accumulator group. When you need to open and close the blowout preventer, the high pressure fluid from the accumulator control manifold through three-way rotary valve is assigned to each control object (BOP) in. Features Remote Console is: with two independent power sources. FKQ Series is equipped with electric pumps and pneumatic pumps, FK Series is equipped with an electric pump and manual pump. Even in case of power failure, can ensure the system work. Accumulator pack has enough high-pressure liquid reserves to meet the BOP stack and close all open hydraulic valve control requirements. Failure of either accumulator bottles accumulator to the total amount of fluid loss is not more than 25%, in line with API specification. Electric pumps and pneumatic pumps are with an automatic start stop control device. In normal operation, even if the automatic control device failure, relief can quickly overflow, to ensure system security. Each BOP opening and closing action by the corresponding three-way rotary valve control. FKQ series commutation control device either directly by hand, but also pneumatic remote commutation. FK Series control device only manual commutation. There are alternate source of pressure on the interface control manifold remote console, you can introduce a pressure source, such as nitrogen backup system when needed. FKQ annular BOP control device series can be remotely controlled pneumatic regulator circuit, and when a sudden failure of the gas source, control pressure can be automatically restored to the original setting, according to API specifications. 4.2 driller console FKQ series control unit can be equipped with Yuji drill console. Driller's console is usually installed in the rig floor, so the driller can easily achieve remote control for the BOP. Driller console features are: working medium is compressed air, to ensure safe operation. Each gas rotary valve spool function are Y-shaped, and can automatically reset, in any case does not affect the remote console for the BOP stack for remote operations. With a working memory function. Each three-way rotary valve, respectively, with a gas cylinder display phase, when the "on" position or the "off" position to the operation of the rotary valve, the display window would be "open" word or "off" character at the same time, turn the gas valve After resetting the handle, display signs remain unchanged, so that the operator can understand once before in the driller's platform status of the operation. To ensure reliable operation of the BOP stack is correct, turn the valve driller console is by way of a secondary operation, that is, to flip the first turn gas supply valve, turn the gas source, while the flip turn the gas control valve, in order to make the appropriate control object movement. 4.3 Air umbilical cable is used to connect the air tube remote console and gas driller road console. Air duct and a plurality of cable sheathing from die composition ends with flanges, respectively, with remote console and driller console connected with a rubber gasket seals the connection between the flanges. 4.4 hydraulic line under normal circumstances, the distance between the remote console with the wellhead BOP stack to 30m, with a set of hydraulic lines required to connect them. Connection with hard piping connections and hose cable. Hard line comprises a tube bent, closed pipe, pipe and other three. Use hard-line connection, a safe, and reliable, the disadvantage is inconvenient layout and installation. Hose line connection is simple, and easy, but in use should pay attention to their safety. According to the site, you can also soft and hard lines mixed use, give full play to their respective advantages. For example, the use of long straight lines bent tube, the ends connected by a hose line. Bent pipe is to protect the high voltage control solution designed specifically pipelines. Press bent tube equipped with high-pressure pipeline control the number of objects to the remote console with the BOP connected. Tubing bent pipe connected between the quick live joints, can hammer on tight, very convenient. In the bent ends of the tube with baffles to protect union when quick handling from damage. Closed elbow (Figure 2) were developed length of 2 m, 3 m and 4 m several, each section of pipe between the elbow by the active phase, rotating flexible, on-site installation is very easy. Three elbow (Figure 3) can be connected with the BOP body can also be used in remote console connected to the outlet and pipe bent. Both ends of the hose line (Figure 4) is generally self-sealing quick connectors, instead of bent tube, pipe and other hard-line closed, to achieve control unit with the BOP connection. Both ends of the pipeline connecting thread 1 LP (oil pipeline pipe thread GB / T 9253.2-1999, equivalent to NPT1, GB / T12716-1991). Connecting line between the general use of quick union or quick connector. 4.5 remote console can be installed alarm warning device for accumulator pressure, air pressure, fuel tank level and monitor the operation of the electric pump, when the above parameters exceed the set alarm limits can be remote console and Division Drilling on the console to the loud, light alarm signal, prompts the operator to take measures. The operator should use the information provided and alarms, as well as information provided by other instruments, a comprehensive analysis of the working status of equipment, ground BOP control system to ensure reliable operation. Alarm function is as follows: low pressure accumulator low pressure alarm alarm air tank low level alarm electric pump operation instructions 4.6 nitrogen nitrogen backup system backup system by a number of high-pressure nitrogen bottles connected with the control manifold composition, for control tube The Department of Energy to provide emergency aid. Nitrogen backup system through the isolation valves, check valves and pressure valve control manifold connections. If the accumulator and (or) pump device can not provide sufficient power to control exchange tube, you can use the backup system to provide high-pressure nitrogen gas manifold to close the blowout preventer. Nitrogen backup system and control manifold connections to prevent prevent pressure liquid nitrogen into the backup system, the operation should be avoided nitrogen into the accumulator circuit. Nitrogen alternate circuit design having a discharge control valve for controlling the discharge of high-pressure nitrogen gas, in order to prevent high-pressure nitrogen gas into the tank. You can also alternate nitrogen accumulator charging system. 4.7 pressure compensation pressure compensation device is ground BOP control device equipment. During drilling, when the tool joint through an annular BOP will produce pressure fluctuations in the hydraulic system. The device will be installed in the annular BOP control of the pipeline, the line pressure fluctuations will be absorbed immediately, which can reduce the annular BOP wear plastic heart, but also in the over-fitting plastic heart so quickly reset, ensure drilling safety. Pressure compensation device installed in the ground BOP control device annular BOP control line in order to ensure the results, should be installed on the device from the annular BOP closed nearer the oil pipeline. 5. Works and instructions start and stop of the electric pump control 5.1 on the remote console electronic control box (Figure 5) of the main switch is turned to "Auto" position, the entire unit will be in automatic control. At this point, if the system pressure is lower than 19MPa (2700 psi), the electric pump pressure controller will start automatically. Pressure oil through the check valve (in the accumulator must be opened before the isolating valve group) group to the accumulator oil. When the system pressure reaches 21MPa (3000 psi), the pressure controller automatically cut off the power, the electric oil pump is stopped. When the system pressure dropped to 19MPa (2700 psi), the electric pump will automatically restart to work. The system is in "auto" state, the pressure accumulator pressure controller group remain at 19 ~ 21MPa, (2700 ~ 3000psi), ready for operation BOP on or off. When the main switch is turned to "manual" position, press the start button, the electric pump will start to work. System pressure rose to 21MPa (3000 psi), it should press the "Stop" button. NOTE: The main switch in the "manual" position, the electric pump does not automatically stop, the operator should observe the system pressure, when you need to manually stop the electric pump. 5.2 hydraulic system control theory