Petrozhr section mill is a kind of casing window opening tool which integrates casing cutting and milling functions. The section mill runs into the casing along with BHA, and cuts the casing at designated position first. After casing is completely cut off, the casing will be directly milled from this position. After reaching a certain depth, the casing window opening task is completed. Petrozhr section mill has the advantages of simple structure, convenient operation to make it a very effective casing window opening tool.
Meanwhile, Petrozhr section mill can squeeze and inject cement in well abandonment operation, which can make cement directly contact with the formation in a long distance within 360 degrees. The cement can enter the reservoir according to the existing porosity and fractures of the formation, and the plugging effect is far better than that of squeezing cement after perforation.