Adjustable Biasing Polished Rod Sealer

Product Usage

The adjustable-biased polished rod sealer developed by the company can be widely used in oil wells where sealing failure occurs due to eccentric wear of the packing and the packing is frequently replaced.

Structure and Working Principle

The upper packing is the main seal and adopts an integral conical spiral sealing ring. It is made of Gabu oil-resistant nitrile rubber, which has high strength, good resistance to extrusion, anti-aging and strong compensation performance.

The lower packing is a secondary seal. When the upper packing needs to be replaced, the lower packing acts as a seal. In this way, there is no need to stop the well for venting when replacing the upper packing, avoiding the loss of crude oil and increasing production; secondly, the lower packing The packing mainly plays the role of straightening the polished rod during use to avoid excessive wear of the upper packing.

The lower packing is made of polytetrafluoroethylene, which has good thermal stability, friction reduction and self-lubricating properties, and is acid and alkali resistant, oil resistant and aging resistant. Designed with a unique cross-sectional shape, when subjected to axial compression, the sealing ring can produce large radial deformation, so that the sealing ring has better radial compensation, liquid self-sealing and self-lubricating properties.

The upper packing box is equipped with a disc spring. When the packing is worn, the disc spring releases its elastic potential energy, which increases the automatic compensation performance of the packing after wear. There is no need to tighten the packing frequently. Secondly, the time required for tightening the packing is reduced. The compression damage caused by the gland to the packing prolongs the service life of the packing.

The upper and lower connecting flanges adopt spherical seals, which can adjust the direction within 360°, so that the sealer has a deflection adjustment function of up to 5°, thereby avoiding the eccentric wear of the sealer packing due to the deflection of the sucker rod and sealer. , causing seal failure.

The Main Technical Parameter: