→50kN /100kN Bow-spring Casing Centralizers Testing Machine
→API Spec 10D Specification for Bow-string Casing Centralizers
→ISO10427-1 Petroleum and natural gas industries-Part 1: Bow-spring casing centralizers
→ISO10427-2 Petroleum and natural gas industries-Part 2: Centralizer placement and stop-collar testing
→ISO10427-3 Petroleum and natural gas industries-Part 3: Performance testing of cementing float equipment
→Functions of a centralizer: The purpose of a casing centralizer is to facilitate running casing to the desired depth and to assist in centring the casing in the wellbore. One of the main objectives of centralizing a casing string is to facilitate a good cementing, thereby isolating fluids from different zones. A bow-spring centralizer can be constructed in various ways, using various types, shapes and quantities of bow spring.
→Key words: starting force, running force, restoring force, holding force, rigid centralizer, stop collar, standoff, standoff ratio, hole size.