Barite Sag Problem in Directional Drilling

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Author(s) Hardy J. M. Rasheed
Pages 424-431
Volume 6
Issue 10
Date November, 2016


Directional drilling is one of the best ways of drilling wells in oil and gas industry for more than three decays. A lot of companies prefer this technology to get target point which is the reservoir, this is due to way of drilling is more economical, get the high production rate in limit time and more environmentally friendly if it is compared to the vertical wells. The sink of barite during drilling process which causes trouble in directional drilling in term of stuck pipe and rotary assemble. The preparation for the drilling fluid which is mud, one of the element uses to make particular mud in horizontal drilling is the barite powder. Owing to the deviating well has angle, this angle allows to barite sink soon than it happens in vertical well and the gravity has the impact in this process.In this work, an attempt has been made to use two type of polymers to find out which one is the best to extension barite sag in directional drilling and also which concentration of polymers is suitable to use for making mud. According to the experiment work showed that the xanthan gum polymer is delay barite sag process more than gum arabic. Relating to concentration, the appropriate weight for xanthan gum is 0.2grams and it is used as a stander by companies in the rig but for gum Arabic, I found the best weight is 0.5grams because when use less 0.5grams the barite sink even during measuring density or weighting and more 0.5grams is not economical to spend each sample more than 0.5grams. Water-based polymer mud has been recognized as an appropriate alternative to oil-based mud because of its shale inhibition possessions, temperature stability, and environmental effectiveness, easy of management, high lubricity, cost effectiveness and stuck pipe prevention.

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