ISO 10427-2:2004 provides calculations for determining centralizer spacing, based on centralizer performance and desired standoff, in deviated and dogleg holes in wells for the petroleum and natural gas industries. It also provides a procedure for testing stop collars and reporting test results.
BS EN ISO 10427-2:2004 history
0000 BS EN ISO 10427-2:2004(2009)
2004BS EN ISO 10427-2:2004 Petroleum and natural gas industries - Equipment for well cementing - Centralizer placement and stop-collar testing