The choke manifold is an auxiliary device for hydraulic blowout preventers (BOPs) and a main piece of equipment used to control blowouts and the pressure of oil and gas wells. It conducts well killing operations through the throttling effect of the choke valve, which displaces the contaminated drilling mud in the well while controlling the wellhead casing pressure and standpipe pressure, thereby restoring the pressure control of the mud column on the well bottom and stopping well kicks. It reduces the wellhead pressure through the pressure relief function of the choke valve to achieve "soft well shut-in". It lowers the wellhead casing pressure through the large-scale discharge effect of the blowout valve to protect the wellhead BOP stack.

Power tongs are widely applicable to offshore and onshore drilling and workover operations, mainly used for making up and breaking out the threads of pipe strings during these operations.

News from this newspaper: Recently, the first toothless hydraulic power pliers designed and developed by the Central Plains Petroleum Engineering Underground Special Operation Company appeared in the Central Plains, and was successfully applied in the 23-36 well of the gas storage tank, marking a breakthrough in the technology of toothless pipe operation in the Central Plains underground.

Drilling power pliers: divided into drill pipe power pliers and casing power pliers. The drill pipe power pliers are usually called liquid gas pliers.