Expandable liner hanger deployed after CDD ///
When field developments encounter bitumen, problems arise such as spike in torque, increase of mud pressure, adhesion to BHA and closure of hole. Such issues increase drilling time and cost, jeopardize well objectives and can cause operators to leave wells sidetracked or abandoned.
Difficulties have impeded data gathering efforts, and therefore, industry lacks comprehensive data on encountering bitumen in the deepwater GOM. Canadian tar sands studies1 may not apply because a typical reservoir temperature is only around 50°F due to shallower reservoir depth (less than 400 ft).
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