Working principle of drilling and production equipment

The lifting ring is connected to the lifting ring seat with a pin shaft, and the lifting ring seat is welded to the hook rod as a whole. The cylinder and hook body are connected with left-hand threads and stop blocks are used to prevent thread loosening. The hook body and cylinder can move up and down along the hook rod. The function of the internal and external load springs is to make the vertical root loosen and bounce upwards when drilling.

The cylinder is filled with engine oil. The seat ring of the thrust bearing divides the oil chamber into two parts, and there are oil holes on the seat ring. Due to the damping effect of oil flow, it absorbs the impact and vibration of the hook body during drilling operations, which can prevent damage to the thread of the drill pipe joint.

The upper end of the cylinder is composed of six small springs and a positioning plate to form a positioning device. With the help of the frictional force between the positioning and the annular contact surface of the lifting ring seat, it can prevent the lifting ring from rotating and causing the lifting ring to shift when lifting the empty hoist.