Casing Rotating Cement Heads,a Custom Fit Solution to Improve ZonalIsolation Results in Colombia,a Field Proven Case

摘要

This technical work describes the path to implement full casing rotation during primary cementing jobs.Explain and share leading edge results from this innovative method,which has allowed performing highlydifficult cement jobs with good quality results at the first attempt at country level.In our current challenging drilling environment,a competent annular zonal isolation is required for long-term integrity.The well known worldwide cement practices has been key to obtain good results,amongthem,casing rotation has been widely applied to liners but not so commonly to full casing strings untilnow; custom fit rotating cements heads were implemented to improve current cement results.The pathwayfollowed to implement this technology considered different activities in a time lapse of three years; startingby evaluating the operator's needs,until achieve a full technology massification in place supported onrequired results.Rotating cement heads have been widely used in a variety of fields within Colombia.At Llanos basin,theyhave been used to improve bond results in front of very washed out sections near the casing shoe; at superiorand mid valley basins,they have allowed obtaining good selectivity between productive zones in very longcement columns.In other areas,this technology has allowed to replace the well-known casing reciprocationpractice granting safer practices.This technology has been appointed as the first option to obtain requiredisolation results for exploratory wells.Nowadays,jobs that in the past had little to no chance of successhave been performed under total control with exceptional results avoiding extra remedial costs.In summarythis technology has broadened the chance to improve results,allowing to perform a cementing operationunder best in class HSE practices,granting the operator to obtain the required solution and providing theway to maximize the value added from mature fields.Use of casing rotating cementing heads is a new trend for the oil industry that allows the operator to obtaincement job results at the very first attempt,reducing costly remedial jobs and maximizing the cement bondto formation and casing,hence,improving the production results at a large scale and boosting wells integrity.