Methods and systems for tripping pipe
AssigneeSchlumberger Technology Corporation
InventorZaurayze TARIQUE
Life of this patent
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Abstract
Methods of adjusting a velocity at which a drill string is moved within a well are provided. One method includes adjusting the velocity at which the drill string is moved within the well based upon a hookload associated therewith. Another method includes adjusting the velocity at which the drill string is moved within the well based upon the actual velocity at which the drill string is moved within the well. Another method includes adjusting the velocity at which the drill string is moved within the well based upon the volume of fluid displaced by the drill string flowing from the well as it is lowered into the well.
Claims18
A method of adjusting a velocity at which a drill string is moved within a well, comprising:
- determining a first hookload associated with a drill string indicative of a weight associated with the drill string;
- calculating a second hookload associated with the drill string indicative of a presumed weight associated with the drill string;
- comparing the first hookload to the second hookload to determine whether the first hookload deviates from the second hookload by at least a target weight limit;
- and
- in response to determining that the first hookload deviates from the second hookload by at least the target weight limit, reducing a velocity at which the drill string is moved within a well.
A method of adjusting a velocity at which a drill string is moved within a well, comprising:
- determining an actual velocity at which a drill string is moved within a well;
- determining a target velocity at which the drill string is to be moved within the well;
- comparing the actual velocity to the target velocity to determine whether the actual velocity exceeds the target velocity by at least a target speed limit;
- and
- in response to determining that the actual velocity exceeds the target velocity by at least the target speed limit, reducing the actual velocity at which the drill string is moved within the well.
A method of adjusting a velocity at which a drill string is moved within a well, comprising:
- determining a first volume of fluid flowing from a well in response to lowering at least a portion of a drill string therein;
- calculating a second volume of fluid indicative of a volume of fluid displaced by lowering the at least a portion of the drill string within the well;
- comparing the first volume to the second volume to determine whether the first volume is greater than the second volume;
- and
- in response to determining that the first volume is greater than the second volume, reducing the velocity at which the at least a portion of the drill string is lowered into the well.
Dependencies are inferred from the claim text.