Determining drilling state for trajectory control
AssigneeSchlumberger Technology Corporation
InventorJunichi Sugiura
Life of this patent
Estimating the term…
Abstract
Methods are provided for determining the drilling state of a downhole tool and controlling the trajectory of the downhole tool in a wellbore during a drilling operation. One method may include identifying a drilling parameter indicative of the drilling state of the downhole tool in the wellbore. The method may also include determining the drilling state based on the identified drilling parameter. The identified drilling parameter may be obtained from a sensor communicatively coupled with a processor and disposed in the wellbore. The method may further include adjusting the operation of an integral controller based on the determined drilling state to control the trajectory of the downhole tool in the wellbore during the drilling operation.
Claims20
A method for determining a drilling state of a downhole tool during a drilling operation, comprising:
- deploying a bottom hole assembly in a wellbore, the downhole tool located in the bottom hole assembly and including a downhole sensor;
- establishing a threshold value for a drilling parameter indicative of the drilling state of the downhole tool;
- measuring an actual value of the drilling parameter using the downhole sensor the downhole tool;
- and
- causing a downhole processor located in the bottom hole assembly to compare the threshold value of the drilling parameter with the actual value of the drilling parameter and determine the drilling state based on the comparison of the threshold value of the drilling parameter with the actual value of the drilling parameter.
A method for determining a drilling state of a downhole tool in a wellbore during a drilling operation, comprising:
- deploying a bottom hole assembly in the wellbore, the downhole tool located in the bottom hole assembly and including a downhole sensor;
- transmitting a signal generated by the downhole sensor to a downhole processor located in the bottom hole assembly, wherein the signal is indicative of a drilling parameter associated with the downhole tool;
- and
- processing the signal in the downhole processor, the downhole processor encoded to utilize statistical analysis of the drilling parameter to determine the drilling state of the downhole tool in the wellbore.
A method for controlling the trajectory of a downhole tool in a wellbore during a drilling operation, comprising:
- deploying a bottom hole assembly in the wellbore, the downhole tool located in the bottom hole assembly and including a downhole sensor;
- identifying a drilling parameter indicative of a drilling state of the downhole tool in the wellbore;
- causing the downhole sensor to measure the drilling parameter;
- causing a downhole processor to determine the drilling state based on the measured drilling parameter;
- and
- adjusting the operation of an integral controller located in the downhole tool based on the determined drilling state to control the trajectory of the downhole tool in the wellbore during the drilling operation.
Dependencies are inferred from the claim text.