CONNECTION MAKER

摘要

Stable back pressure control devices are used to control fluid pressure in a wellbore to provide constant downhole pressure. Back pressure may be estimated from a correlation between the speed of a mud pump and the pressure exerted from the pump. Drilling plans disclosed herein provide for the continued operation of one or more back pressure control devices for providing constant bottomhole pressure when casing connections are being made.

主权项

1. A method comprising:
defining a drilling plan for a first section of wellbore; determining a desired drilling pressure for the first section of the drilling plan; and determining a pump speed and a corresponding choke set point to produce the desired drilling pressure for a first segment of the drilling plan.