Working principle of the hydraulic power tongs working principle of hydraulic power tong is the power of the workover rig is passed to the hydraulic power tongs of hydraulic motor through reducer, and then the two grade or level of deceleration, the clamp head split gears, produce high and low two rotational speed, thus promote pipe (drill) with rotating open gear turns, the frame under the action of braking hammer of braking first not rotate, opening his gear and a relative motion between palatal plate frame So, two palatal plate roller can climb on the slope board, and forced the crotch plate on the jaws to pipe (drill) center moving, until the clenched pipe (drill), and then with the open gear drive pipe (drill) turn the laizhou ShiBa force oil machinery co., LTD., founded in 1998, is a collection of scientific research production sales and service in one, specializing in the production of oil workover equipment of high-tech joint-stock enterprises; It is a member of the first-class supply network of China petroleum materials and equipment corporation and China petrochemical corporation. China's top 50 petroleum and petrochemical equipment manufacturing enterprises