Pumping unit polish rod centralized connecting device

Abstract

The invention discloses a pumping unit polished rod centering connecting device for connecting a well head tee pipe of an oil field pumping well with a plurality of packing boxes, consisting of a well head tee junction cavity, a translational movable ball seat, a movable ball joint connector, a nylon lining and a ball joint press cap , wherein, the translational movable ball seat is arranged inside the well head tee junction cavity; the movable ball joint connector is arranged inside the transitional movable ball seat; the nylon lining is sleeved inside the movable ball joint connector; the ball joint press cap is in threaded connection with the well head tee junction cavity. The invention replaces the prior inflexible connection of collar clamps and can butt joint with various packing boxes; the structure is simple, convenient and compact, and the device has offset and centering functions under the effect of the translational ball seat and a ball joint, thereby a polished rod is made to be automatically centered. Therefore, the invention solves the environmental pollution problem due to eccentric wear and oil leakage of packings, and has the advantages of reduction of personnel labor intensity, reduction of material consumption and improvement of management level.

Description

technical field [0001] The invention relates to a connection device between a wellhead tee pipe of an oil pumping well in an oil field and various packing boxes, in particular to a connection device for centering a polished rod of a pumping unit. Background technique [0002] At present, in the production process of pumping units in various oil fields, it is often affected by factors such as weak foundation construction, unbalanced pumping units, "U"-shaped bolts on the bearings in the beam that increase the vibration of the polished rod during movement, and operations and construction. As a result, the polished rod and the wellhead are misaligned, resulting in eccentric wear of the packing, oil leakage, environmental pollution to varying degrees, reduced service life of the packing, increased management difficulty, material consumption and labor intensity of employees. In addition, the existing deflection adjustment and centering technologies are all integrated with the wel...

AI Technical Summary

Problems solved by technology

[0002] At present, in the production process of pumping units in various oil fields, it is often affected by factors such as weak foundation construction, unbalanced pumping units, "U"-shaped bolts on the bearings in the beam that increase the vibration of the polished rod during movement, and operations and construction. As a result, the polished rod and the wellhead are misaligned, resulting in eccentric wear of the packing, oil leakage, different degrees of pollution to the environment, reducing the service life of the packing, increasing management difficulty, material consumption and labor intensity of employees

In addition, the existing deflection adjustment and centering technologies are all integrated with the wellhead packing box. The disadvantage is that the deviation adjustment and centering cannot be used at the same time, and the structure is complicated, and it cannot be connected with various packing boxes.

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