Published September 2019
Temperature influence on drilling tool sticking while drilling deep wells
T.Sh. SalavatovOne of the prospective directions towards drilling tool sticking elimination is based on Joule-Thomson effect. The essence of it lies in the fact that various temperature parameters among bottomhole zone, formation and well create differential pressure from bottomhole zone to the well. Carried out investigation show that for the elimination of drilling tool sticking it is necessary to consider the impact of many aspects. Sticking of drilling tool takes place not only under the influence of pressure difference, which is partially compensated by backpressure, associated with Joule-Thomson effect. In case when there is no Joule-Thomson effect, i.e. Tform = Twell, dominating role belongs to pressure drop. In some cases, resulted backpressure associated with Joule-Thomson effect is more significant than differential pressure, which leads to drilling tool sticking. Consequently, based on production data using Joule-Thomson theory, it is possible to define the influence of various temperature parameters on drilling tool sticking.
