centralizer造句怎么写

The current centralizer has such defects as being apt to tire and wear off, worse seal and the wasting of fluid resistance.

The dynamic strength of rod string and the mount position of centralizer were calculated, according to the acquired deformation of rod string and its impact contact force with tube in the time domain.

I smiled, small SanNeng centralizer, the devil angel's wings.

The product consists of wear-resistant alloy centralizer body and pumping rod with simple structure.

The pipe string includes double hydraulic cylinder with anchorage packer, double hydraulic cylinder without anchorage packer, releasing tool, reversing valve and centralizer.

Circular design is adopted for the upper and lower end face of centralizer body to avoid contact with the tubing and the wear and tear between pumping rod and tubing ends of.

Design of the test device for the frictional abrasion of the sucker rod centralizer

At the same time on the centralizer body there will form a uniform layer of oil film, reducing friction with the tubing wall.

Made up of oil expanding type or water expanding type expandable elastomer material, mechanical pipe string, centralizer and etc.

Where to connect the centralizer.