Non-leakage hydraulic cylinder type oil well head device

• Main Authors: HE ZHIWEI, HE CHENYU
• Format: Patent
• Language: Chinese; English
• Published: 05.09.2012
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model relates to a non-leakage hydraulic cylinder type oil well head device. Packing blockage is used for realizing sealing when an oil pumping unit runs, a beam hanger and packing frictionally move relatively, and absolute sealing cannot be realized; oil leakage of a well head causes waste of resources; and security incidents are easy to be caused due to eccentric wear of the beam hanger. A connecting clamp is arranged at the top of the non-leakage hydraulic cylinder type oil well head device, a sealing part puller bolt is disposed below the connecting clamp, and a sealing multistage cylinder is disposed on the periphery of the sealing part puller bolt; inner gasket slips are disposed between the connecting clamp and the beam hanger; a conical sealing sleeve is disposed at the lower end of the sealing part puller bolt; and the multistage cylinder moves along with vertical movement of the beam hanger. The multistage hydraulic cylinder structure can replace a traditional stuffing box, can completel