18-35 Double Ram Hydraulic Blowout Preventer

The 18-35 double gate hydraulic blowout preventer is a commonly used safety sealing wellhead equipment to prevent blowouts during oil testing, repair, completion and other operation processes. It integrates the characteristics of full sealing and semi sealing, and has the features of beautiful structure, easy to operate, and high pressure resistance

In the existing technology, the upper and lower layers of the 18-35 double gate hydraulic blowout preventer used to seal the wellhead are symmetrical, and the blowout prevention is hindered by the relative movement from the wellhead, resulting in the contact gap between the two gate plates in the middle of the wellhead being easily separated under the action of high-pressure oil and gas, thereby losing the blowout prevention function; At present, the hydraulic blowout preventers used in oil fields mainly include shells, side doors, gate plates, and hydraulic cylinders. There is a main channel in the middle of the shell, and stamping chambers are symmetrically arranged on both sides of the shell walls. Two oil cylinders are placed in the cylinder chamber, and the side door, hydraulic cylinder, and cylinder head are sequentially installed outside the cylinder chamber on both sides of the housing. The hydraulic cylinder body is equipped with a piston and a piston rod. One end of the piston rod is connected to the piston through a side door, and the other end is connected to the piston; The locking shaft passes through the cylinder head and is connected to the piston; Due to the cylindrical shape of the hydraulic cylinder, the side door is the bottom of the cylinder, and the piston rod and piston are also separate structures, which not only have complex processing, low accuracy, and high cost, but also are inconvenient to disassemble and maintain, resulting in low safety and reliability

During drilling operations, assemble the 18-35 double ram hydraulic blowout preventer onto the wellhead casing head to control the high-pressure oil, gas, and water blowout equipment. When the oil and gas pressure inside the well is high, the blowout preventer can seal the wellhead. When heavy mud is pressed out of the drill pipe, there are four-way valves under the gate, which can replace the mud invaded by gas, increase the pressure of the liquid column in the well, and suppress the high-pressure oil and gas from spraying out