The term “formation strength.” Explain the term “formation strength.” Explain why we need to know formation strength (for example, to Why formation strength is important. determine the maximum pressure that can be safely applied to the open hole shoe formation). Formation Stresses How formation strength can be determined on Explain the differences between FIT and LOT; explain how to conduct I and Strength the rig. FIT and LOT Explain the key tasks to carry out to to ensure accurate FIT/LOT measurements (for example, clean the hole, ensure consistent mud Key tasks to ensure an accurate FIT/LOT. weight around the well, calibrate the pressure gauges, and test the surface equipment for leaks). Define the term “Maximum Anticipated Define the term “maximum anticipated surface pressure.” Surface Pressure” (MASP). Maximum Anticipated Explain why MASP is important for well control/integrity (for example, A Surface Pressure the consequences of exceeding maximum pressure limitations; BOP How MASP is used in well design. selection; casing burst selection; wellhead rating; surface manifolds pressure ratings). The terms “Maximum Allowable Annular Explain the terms “MAASP” (Note: also known as Maximum Allowable Surface Pressure” (MAASP) and “Maximum Casing Pressure (MACP)) and “maximum allowable (leak-off) mud Maximum Allowable Allowable (leak- off) Mud Weight.” weight.” Annular Surface State the consequences of exceeding MAASP or leak-off mud weight on Why MAASP and maximum allowable Pressure and I well control/integrity (for example, lost circulation; a drop in mud level; mud weight are important to the Driller. Maximum Allowable potential kicks; downtime). Mud Weight Calculating MAASP. Calculate MAASP using given data on formation strength. When MAASP must be re-calculated. Give examples of when MAASP needs to be re-calculated. The term “wellbore ballooning.” Explain the term “wellbore ballooning.” Recognize drilling trends that help the Driller to identify potential Ballooning I How to recognize ballooning. ballooning (for example, losses while circulating; gains when the pumps are off).
Formation Stresses and Strength I The term “formation strength.” Explain the term “formation strength.” Why formation strength is important. Explain why we need to know formation strength (for example, to determine the maximum pressure that can be safely applied to the open hole shoe formation). How formation strength can be determined on the rig. Explain the differences between FIT and LOT; explain how to conduct FIT and LOT Key tasks to ensure an accurate FIT/LOT. Explain the key tasks to carry out to to ensure accurate FIT/LOT measurements (for example, clean the hole, ensure consistent mud weight around the well, calibrate the pressure gauges, and test the surface equipment for leaks). Maximum Anticipated Surface Pressure A Define the term “Maximum Anticipated Surface Pressure” (MASP). Define the term “maximum anticipated surface pressure.” How MASP is used in well design. Explain why MASP is important for well control/integrity (for example, the consequences of exceeding maximum pressure limitations; BOP selection; casing burst selection; wellhead rating; surface manifolds pressure ratings). Maximum Allowable Annular Surface Pressure and Maximum Allowable Mud Weight I The terms “Maximum Allowable Annular Surface Pressure” (MAASP) and “Maximum Allowable (leak- off) Mud Weight.” Explain the terms “MAASP” (Note: also known as Maximum Allowable Casing Pressure (MACP)) and “maximum allowable (leak-off) mud weight.” Why MAASP and maximum allowable mud weight are important to the Driller. State the consequences of exceeding MAASP or leak-off mud weight on well control/integrity (for example, lost circulation; a drop in mud level; potential kicks; downtime). Calculating MAASP. Calculate MAASP using given data on formation strength. When MAASP must be re-calculated. Give examples of when MAASP needs to be re-calculated. Ballooning I The term “wellbore ballooning.” Explain the term “wellbore ballooning.” How to recognize ballooning. Recognize drilling trends that help the Driller to identify potential ballooning (for example, losses while circulating; gains when the pumps are off).
WCT-02-DO-D_DrillingOps_SECOND-EDITION_rev0.docx