Sucker Rod-Introduction

Posted by wang jianyi on March 18th, 2016

Sucker rod is a thin rod of pumping unit. It is connected with main rod in the top. In the bottom, it is linked with subsurface pump. And sucker rod plays a role of transporting power. Each oilfield sucker rod is six meters long. Its material is carbon steel with plating chromium on the surface. The piston in the oil pipe threaded with a hoop connection has been extended to the underground reservoir. And pump oil through reciprocating motion. Nowadays, in generally, length of oil well is about two thousand meters.
 
Sucker rod is a main equipment of rod pumping equipment. It conveys the power of pumping unit to subsurface pump. The oilfield sucker rod string is formed by a plurality of dozens or hundreds of oilfield sucker rod which connect with each other through the connecting hoop.

In the process of oil production, the oilfield sucker rod string is subjected to asymmetrical cyclic loading. The working medium of oilfield sucker rod is well fluid (oil and water beds). While much well fluid contains corrosive media. So the main failure mode of the oilfield sucker rod is fatigue fracture or corrosion fatigue fracture. The break off accident of oil pumping rod not only will seriously affect the production of crude oil, but also increase the cost of repairing well and raise the cost of crude oil.

Failure of oilfield sucker rod thread is often shown as thread drawing. But because of the design of the lower part of the screw thread of the modern API oilfield sucker rod and the manufacture of the screw thread, this kind of problem has been greatly reduced.

Torlins as an oilfield sucker rod manufacturer will offer you oilfield sucker rod with high quality and suitable price as you want. Please contact us. It is waiting for you.