Active vibration control for subterranean drilling operations
View Patent ↗An active vibration control device improves drilling by actively applying a dampening profile and/or a controlled vibration to a drill string and/or bottomhole assembly (BHA). Embodiments of the present invention control the behavior of a drill string and/or BHA in order to prevent or minimize the occurrence of harmful drill string/BHA motion and/or to apply a vibration to the drill string/BHA that improves one or more aspects of the drilling process. Measurements of one or more selected parameters of interest are processed to determine whether the undesirable vibration or motion is present in the drill string or BHA and/or whether the drill string and/or BHA operation can be improved by the application of a controlled vibration. If either or both conditions are detected, corrective action is formulated and appropriate control signals are transmitted to one or more devices in the drill string and/or BHA.
1. An apparatus for controlling vibration of a tubular disposed in a wellbore, comprising:
an active vibration control device coupled to the tubular, the active vibration control device including a plurality of members coupled to at least one biasing member positioned to move within a controllable material having a variable stiffness, the active vibration control device controlling a vibration in the tubular when the stiffness of the controllable material is changed.
2. The apparatus according to claim 1 , wherein the active vibration control device controls one of (i) a loading, and (ii) unloading of the at least one biasing member to control vibration.
3. The apparatus according to claim 1 , wherein the controllable fluid is one of (i) a smart fluid, and (ii) a smart material.
4. The apparatus according to claim 1 , wherein the active vibration control device includes a coupling having at least an upper portion and a lower portion wherein each portion is connected to the tubular.
5. The apparatus according to claim 1 , wherein the plurality of members includes a coupling having at least an upper portion and a lower portion, wherein each portion includes a claw.
6. The apparatus according to claim 1 wherein the plurality of members includes a coupling having at least an upper portion and a lower portion, and a plurality of biasing members interposed between the upper portion and the lower portion, the plurality of biasing elements being configured to include one of: (i) an adjustable rate of loading, and (ii) an adjustable rate of unloading.
7. The apparatus of claim 1 further comprising:
a controller including a computer program to (i) process data to determine whether a non-beneficial condition exists in the wellbore tubular, and (ii) control the active vibration control device to mitigate the non-beneficial condition.
8. A method for controlling vibration in a tubular disposed in a wellbore, comprising:
coupling an active vibration control device to the tubular, the active vibration device including a plurality of members coupled to at least one biasing member positioned to move within a controllable material having a variable stiffness that enables the active vibration control device to control the vibration in the tubular; and
operating the active vibration control device to control the vibration in the tubular by varying stiffness of the controllable material.
9. The method according to claim 8 further comprising:
measuring at least one selected parameter of interest relating to one of: (i) the tubular, and (ii) a bottomhole assembly connected to the tubular, and varying the stiffness of the controllable material in response to the measured parameter.
10. The method according to claim 9 wherein the at least one selected parameter is one of: (i) axial vibration, (ii) torsional vibration, (iii) drill string whirl, (iv) bit bounce, (v) slip-stick; and (vi) lateral vibration.
11. The method according to claim 9 wherein the active vibration device varies the stiffness of the controllable material that reduces the measured value of the at least one selected parameter.
12. The method according to claim 8 wherein the plurality of members includes a coupling having at least an upper portion and a lower portion, the method further comprising:
connecting each portion to a section of the tubular; and
connecting the upper portion to the lower portion with claws.
13. The method of claim 8 wherein the plurality of members includes a coupling having at least an upper portion and a lower portion, the method further comprising:
disposing a plurality of biasing members between the upper portion and the lower portion; and
adjusting one of: (i) a rate of loading, and (ii) a rate of unloading for at least one of the plurality of biasing members.