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What is the cause of drilling resistance? How to deal with it?
Release time:
2019-09-21
Author:
Source:
The reasons for the resistance in the drilling are:(1) the well collapses after the completion of the drilling. (2) The well diameter is reduced due to poor mud performance, large water loss, thick mud cake and formation expansion. (3) The diameter of the drill bit was seriously worn out during the last trip, and the new drill bit was blocked. (4) The mud is not well circulated before tripping out, and the drilling cannot be carried out to the bottom. (5) Structural changes of drilling tools. If the large drilling tool is replaced or the diameter centralizer is enlarged, it is easy to encounter resistance when the drill bit type is replaced.
Treatment method: before tripping out, the mud must be circulated well, and the performance of the mud must be well treated. During tripping out, the mud must be well filled according to regulations. Can not be strong pressure, strong down. Before tripping, the type and size of the drill bit shall be checked in detail; if the size of the drilling tool changes, attention shall be paid to prevent blocking and sticking during tripping.
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