Pump Suction Reverse Circulation Well Flushing Method

Abstract: This paper introduces the pump suction reverse circulation well flushing technology, which realizes well bore desilting through negative pressure suction. It involves special equipment and two starting methods, among which vacuum negative pressure starting is the preferred one. This technology is energy-saving and efficient, suitable for medium-shallow water wells with a depth of 60–80 meters. The construction key points, restricted scenarios and acceptance standards such as sand content of water quality are specified.

Air-Lift Reverse Circulation Well Flushing Method

Abstract: This paper elaborates the principle, complete supporting equipment and core parameters of air-lift reverse circulation well flushing technology, as well as field fault disposal methods, compares the advantages and disadvantages of two types of mixers, and provides standardized construction control indexes.

Drilling Well Flushing Technology

Abstract：This paper introduces the three core functions of well flushing in drilling: cooling drilling tools, removing cuttings and cleaning the bottom, and supporting the wellbore. It expounds the characteristics and selection requirements of four types of well flushing media. The two mainstream well flushing processes, direct circulation and reverse circulation, are compared, their respective characteristics are analyzed, and the technical parameter control standards for the reverse circulation process are clarified, which can provide a reference for field drilling construction.