Application of reaming while drilling tools in Shengli Oilfield

In view of the technical problems such as the irrational casing program, the small cementing annular clearance, the safe drilling in the gypsum formation, the Shengli Oilfield Drilling Institute develops four kinds of reaming while drilling tools suitable for different complicated conditions. The structural principle, characteristics, and field application of all reaming tools are introduced in detail. The bottomhole assembly (BHA) scheme during the process of reaming while drilling in different wells is analyzed. Appropriate reaming while drilling tools and the optimal BHA suitable for all complicated wells are developed. Field application shows that better results can be obtained by using the five kinds of reaming while drilling tools.