Abstract: A theoretical model of borehole failure has been developed which predicts the conditions for pressure-induced lost circulation (hydraulic fracturing) and borehole collapse. The model can be used ...

Abstract: With the trend toward deeper objectives, the time spent drilling through casing has increased with a consequent increase in casing wear. As a result of the expanded importance of casing wear, ...

Abstract: A theoretical analysis has been performed to determine the effects of wear on the burst strength of casing. Burst occurs either by a leakage at the casing joint or by a rupturing of the ...

Abstract: A theoretical analysis has been performed to determine the effects of wear on the burst strength of casing. Burst failure occurs either by a leakage at the casing joint or by rupturing of ...

Abstract: Deviation of boreholes is caused by drill string flexibility and the interaction between the drill bit and the formation being drilled. While work has been devoted to the analysis of drill ...

Abstract: Previous tests [1] have shown drill pipe protectors are of value in reducing casing wear, particularly at high contact loads. However, the brand of protectors tested could not withstand high ...

Abstract: Procedures are presented for estimating the amount of casing wear produced in wells by the rotation of tool joints, drill pipe, and drill pipe protectors against casing. The procedures are ...