Sucker rod

Abstract

A sucker rod, including: a rod; a threaded casing disposed outside the rod; a wedge-shaped groove disposed at one end of the rod; an outer connecting screw thread close to the wedge-shaped groove and disposed outside the rod; a wedge-shaped bulge disposed at the other end of the rod; a positioning nut close to the wedge-shaped bulge and matching with the threaded casing and disposed outside the rod; an inner nut flexibly disposed outside the rod between the positioning nut and the wedge-shaped bulge; and an outer nut flexibly disposed outside the rod for cooperation with the threaded casing; a convex plate disposed inside one end of the threaded casing for cooperation with the positioning nut; and an inner connecting screw thread disposed at the other end of the threaded casing for cooperation with the outer connecting screw thread. The sucker rod has a high torsional strength and is stable.

1 . A sucker rod, comprising:
 a) a rod;   b) a threaded casing disposed outside the rod;   c) a wedge-shaped groove;   d) an outer connecting screw thread;   e) a wedge-shaped bulge; and   f) a positioning nut;   
       wherein
 the wedge-shaped groove is disposed at one end of the rod, and the outer connecting screw thread close to the wedge-shaped groove is disposed outside the rod; and 
 the wedge-shaped bulge is disposed at the other end of the rod, and a positioning nut close to the wedge-shaped bulge and matching with the threaded casing is disposed outside the rod using a flexible connection. 
 
     
     
         2 . The sucker rod of  claim 1 , wherein an inner nut is disposed outside the rod using a flexible connection between the positioning nut and the wedge-shaped bulge. 
     
     
         3 . The sucker rod of  claim 1 , wherein an outer nut is disposed outside the rod using a flexible connection for cooperation with the threaded casing. 
     
     
         4 . The sucker rod of  claim 2 , wherein an outer nut is disposed outside the rod using a flexible connection for cooperation with the threaded casing. 
     
     
         5 . The sucker rod of  claim 3 , wherein a convex plate is disposed inside one end of the threaded casing for cooperation with the positioning nut, and the other end of the threaded casing is provided with an inner connecting screw thread. 
     
     
         6 . The sucker rod of  claim 4 , wherein a convex plate is disposed inside one end of the threaded casing for cooperation with the positioning nut, and the other end of the threaded casing is provided with an inner connecting screw thread. 
     
     
         7 . The sucker rod of  claim 5 , wherein the flexible connection is a threaded connection. 
     
     
         8 . The sucker rod of  claim 6 , wherein the flexible connection is a threaded connection.