Design of emergency rescue device for the blowout in the process of well drilling

A blowout emergency rescue device was designed to deal with the uncontrolled blowout in the process of drilling operation. In the mode of remote control, this device can be connected with the bare casing and seal the wellhead reliably, so as to improve the safety of blowout emergency rescue operation. This blowout emergency rescue device is composed of supporting system, root system, hoisting system, centralizing system, capping system and casing clamping system. And its operation process is as follows. First, the blowout emergency rescue device is supported at the wellhead by the supporting frame, and the fixed frame is pushed forward to the assigned position by the hydraulic cylinder on the supporting frame. Later, the body of the casing is clamped by the root system, and thus the blowout emergency rescue device is rooted. Second, by virtue of the centralizing system, the capping system moves horizontally all around to make the axial line of capping system aligned with that of the casing. Third, the capping system stops moving after it is lowered by the hoisting system to the assigned location. Fourth, the annular BOP (blowout preventer) and the blind ram BOP are shut down to seal the hole inside the casing and the annulus space between the capping system and the casing. All systems were structurally designed in detail and then finite element analysis was conducted on the key parts by using ABAQUS finite element software. It is indicated that the strength and stiffness of this device are satisfactory. Faced with the long rescue time and high operation risk of current blowout acci-dents, this blowout emergency rescue device can connect with the wellhead bare casing to stop the blowout immediately. And it can cap the wellhead whose pressure is 35 MPa.