As well as riser running, Lower Marine Riser Package LMRPP) operations and emergency disconnect, operators can learn from simulations in casing operations, high-pressure high temperature (HPHT) drilling operations and managed pressure drilling.
In casing completion operations, multiple devices can be connected to the casing string at the corresponding intervals.
Landing string used in ultra-deepwater casing running operations sustains complicated loads, including axial load, slip crushing load, bending load and dynamic load.
In these methods, sufficient margin of over pull is taken into account for the extreme axial load during surface casing running operations and environment loads caused by wave, current and vessel offset and heave.
State files on more than 110 company wells in Aliso Canyon and other fields show that Southern California Gas commonly kept wells with damaged casings in operation by using cement patches, metal sleeves or inner liners.
In this study, well integrity is modeled during casing and cementing operations.
To determine the relations between cutting force, structure, and operating parameters of a hydraulic cutter to optimize its design and operation, the casing cutting mechanism of a hydraulic cutter was analyzed.
In both approaches, the initial stress states in the formation and in the cement, as well as the drilling operation, the casing run, the pressure changes, and the pore pressure variations are considered.
Open image in new window Fig. 3 Effect of closed casing on the dry operation.
These findings should allow engineers involved in drilling operations and casing installation to assess more accurately the forces required to pull tools out of the borehole when problems arise.
