Sinker bar, a steel rod of a specified length, normally in a larger diameter than sucker rods, is provided in standard sizes with externally threaded ends offered to add weight and stability to the sucker rod string. An oil well uses only one sinker bar, and it is placed at the bottom of the sucker rod string. We offer carbon steel sinker bar, alloy steel sinker bar, etc.
Generally, sinker bar has one elevator neck on one end, and pin threads on each end maybe sucker rod thread or polished rod thread, determined by the sucker rod string.
Product Specification / Models
Tensile Strength Rm (Mpa) above 621
Elongation Percentage A(%) above 12
Reduction Percentage of Area Z(%) above 55
Established in 2004 and located in the well-known steel city Baotou, Baotou Liande Oil and Mechanical Co., Ltd. (hereinafter referred to as "Liande”) is a private joint-stock company aiming at R&D, manufacturing, sales and technical services of sucker rod products for mechanical oil extraction.
Certifications and Honors
With more than 10 years development, Liande has become one of the most competitive sucker rod manufacturers and also top grade suppliers. We are a member of CNPC EnergyAhead website and SINOPEC material purchasing website.
In 2005, we obtained production license of sucker rods, and we were certified by ISO 9001 quality management system. In August, 2005, we got the license of using API monogram issued by American Petroleum Institute (API). In addition to these, we also gained a number of municipal awards issued by the local government.