First, use the choke manifold control box is a control device on hydraulic choke manifold, which can be remotely controlled hydraulic opening and closing the throttle valve and the control box can be displayed on the disk standpipe pressure, casing pressure pressure value. Thus to maintain the balance of bottomhole pressure control is successful kick, blowout, implementing oil, gas pressure control equipment necessary; if equipped pump stroke counter can also show separately the number of red mud three, frequency and total times. Second, the technical parameters (1) Air pressure: 0.6MPa (2) Ambient temperature: -200C- + 600 (3) Working pressure: 3MPa ~ 4MPa (4) gas line quick connector size: M16 * 1.5 (5) oil line Quick Connector size: M22 * 1.5 (6) hydraulic oil specifications: wear-resistance to low temperature hydraulic oil Third, the principle and shape structure: How it works: Kill hydraulic choke manifold control box works as a gas, liquid balance principle It sets pneumatic, hydraulic one, the external source of hydraulic pressure into hydraulic energy to control the throttle valve opening or closing, in order to stabilize the bottomhole pressure, to control the throttle and kill effect. 1) pneumatic pump characteristics and uses: it is the use of compressed air as a power source to a pneumatic pump pressure source, air pressure and hydraulic pressure is proportional to the output. By adjusting the pressure of the gas supply will be able to obtain the corresponding fluid pressure. When the gas pressure and hydraulic pressure balance, pneumatic pump will stop charging voltage, output hydraulic pressure will stabilize in the prediction of pressure by controlling the gas flow, thereby controlling the speed boost. So they have proof, adjustable output pressure, boost speed controllable, small size, light weight, simple operation, reliable performance, a wide range of features. It is suitable for the petrochemical industry, valves, pipes and other fluid pressure vessel pressure test can also be used as a hydraulic control system pressure source. 2) Working principle: pneumatic hydraulic pump is a gas-liquid equilibrium theory, it is through the larger diameter to a smaller diameter pneumatic piston hydraulic ram force transmission, which can transmit a higher fluid pressure. 3) hydraulic throttle control according to the requirements of the drilling process, moving control of the three-way manual valve on the tank disk, control hydraulic throttle is opened and closed by the valve opening table to control its valve opening size to balance downhole drilling process required back pressure. Once the gas supply interruption site, the use of energy to maintain the accumulator hydraulic throttle "on" and "off" time. When also on the throttle opening and closing operation, closed accumulator valve, use the "manual pump" to maintain hydraulic throttle operation.