Selectively actuated plungers and systems and methods including the same

Patent metadata

Field	Value
Publication number	US-9976399-B2
Application number	US-201514597748-A
Country	US
Kind code	B2
Filing date	Jan 15, 2015
Priority date	Mar 26, 2014
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

Selectively actuated plungers and systems and methods including the same are disclosed herein. The methods include flowing a wellbore fluid stream in fluid contact with a plunger and in an uphole direction within a wellbore conduit while the plunger is located within a target region of the wellbore conduit. The methods further include maintaining the plunger in a low fluid drag state while a variable associated with the wellbore fluid stream is outside a threshold range and transitioning the plunger to a high fluid drag state responsive to the variable associated with the wellbore conduit being within the threshold range. The methods further include conveying the plunger in the uphole direction within the wellbore conduit. The systems include the plungers and/or hydrocarbon wells that include the plungers.

First claim

The invention claimed is:

1. A method of removing a liquid from a wellbore conduit with a plunger, the method comprising:
flowing a wellbore fluid stream in fluid contact with the plunger and in an uphole direction within the wellbore conduit, wherein the wellbore conduit is defined by a conduit body and extends within a wellbore, and further wherein the plunger is located within a target region of the wellbore conduit and is configured to selectively transition alternatively between a low fluid state and a high fluid drag state within the wellbore conduit, wherein the wellbore conduit defines a distance between a surface region and the target region of the wellbore conduit;
maintaining the plunger in the low fluid drag state while a variable associated with the wellbore fluid stream is outside a threshold range, wherein the maintaining permits the plunger to remain within the target region of the wellbore conduit during the flowing;
transitioning the plunger to the high fluid drag state responsive to the variable associated with the wellbore fluid stream being within the threshold range, wherein the transitioning includes increasing a resistance to fluid flow past the plunger within the wellbore conduit;
the plunger comprising a detector and a controller, the controller in communication with the detector;
configuring the detector to detect the variable associated with the wellbore fluid stream;
detecting with the detector that the variable associated with the wellbore fluid stream is within the threshold range;
initiating the transitioning with the controller responsive to the detecting;
subsequent to the transitioning, conveying the plunger in the uphole direction within the wellbore conduit with the wellbore fluid stream to convey the liquid in the uphole direction; and
decreasing a fluid drag on the plunger, with the controller, to cease the conveying the plunger in the uphole direction and returning the plunger to the target region of the wellbore conduit without the plunger traversing the entire distance between the surface region and the target region of the wellbore conduit.

2. The method of claim 1 , wherein the target region of the wellbore conduit is distal from an uphole end of the wellbore conduit.

3. The method of claim 1 , wherein, during the conveying, the method further includes determining a location of the plunger within the wellbore conduit with the controller.

4. The method of claim 3 , wherein the plunger further includes a collar locator, and the determining includes determining based, at least in part, on a collar log and data from the collar locator.

5. The method of claim 1 , wherein, during the conveying, the method further includes determining a speed of the plunger within the wellbore conduit with the controller and regulating the speed of the plunger within the wellbore conduit with the controller.

6. The method of claim 5 , wherein the regulating includes decreasing a fluid drag on the plunger within the wellbore conduit to decrease the speed of the plunger.

7. The method of claim 1 , wherein the method includes calculating, with the controller, that a speed of the wellbore fluid stream is sufficient to convey the liquid to the surface region.

8. The method of claim 1 , wherein the method further includes collecting downhole data with the detector, wherein the collecting includes collecting the downhole data while the plunger is within the target region of the wellbore conduit.

9. The method of claim 1 , wherein the method further includes collecting downhole data with the detector, wherein the collecting includes collecting the downhole data during the conveying.

10. The method of claim 1 , wherein the variable associated with the wellbore fluid stream includes a pressure of the wellbore fluid stream.

11. The method of claim 1 , wherein the variable associated with the wellbore fluid stream includes a temperature of the wellbore fluid stream.

12. The method of claim 1 , wherein the variable associated with the wellbore fluid stream includes a flow rate of the wellbore fluid stream past the plunger.

13. The method of claim 1 , wherein the variable associated with the wellbore fluid stream includes a density of the wellbore fluid stream.

14. The method of claim 1 , wherein the variable associated with the wellbore fluid stream includes a plurality of variables associated with the wellbore fluid stream, wherein the plurality of variables associated with the wellbore fluid stream includes at least two of a temperature of the wellbore fluid stream, a pressure of the wellbore fluid stream, a density of the wellbore fluid stream, and a flow rate of the wellbore fluid stream.

15. The method of claim 1 , wherein, subsequent to the conveying, the method further includes repeating the method, wherein the repeating the method comprises:
returning the plunger to the target region of the wellbore conduit, wherein the returning includes returning the plunger to the target region of the wellbore conduit without shutting in the wellbore; and
repeating the flowing, the maintaining, the transitioning, and the conveying.

16. The method of claim 1 , wherein the method further includes releasing a supplemental material into the wellbore conduit, wherein the releasing includes at least one of:
(i) releasing the supplemental material from the plunger while the plunger is within the target region of the wellbore conduit; and
(ii) releasing the supplemental material from the plunger while the plunger is being conveyed in the uphole direction within the wellbore conduit.

17. The method of claim 1 , wherein the plunger includes a power source, wherein the method includes powering the plunger with the power source, wherein the method includes re-charging the power source, and further wherein the re-charging includes at least one of (i) re-charging while the plunger is located within the target region of the wellbore conduit and (ii) re-charging while the plunger is proximal to a surface tree that is associated with the gaseous hydrocarbon well.

18. The method of claim 17 , wherein, during the re-charging, the method further includes conveying data from the plunger to a surface region.

19. The method of claim 1 , wherein the method further includes locating the plunger within the target region of the wellbore conduit, wherein the locating includes at least one of:
(i) locating the plunger within the target region of the wellbore conduit without shutting in the wellbore; and
(ii) locating without exposing the wellbore conduit to ambient atmospheric conditions.

20. A plunger configured to remove wellbore material from a wellbore, the plunger comprising:
a drag-regulating structure that is configured to selectively regulate a fluid drag on the plunger when the plunger is located within a wellbore conduit that is defined by a conduit body and a wellbore fluid stream flows past the plunger, wherein the wellbore conduit defines a distance between a surface region and the target region of the wellbore conduit;
a detector to detect a variable associated with the wellbore fluid stream;
an on-board controller in communication with the detector, wherein the controller is programmed to selectively transition the plunger alternatively between a low fluid drag state and a high fluid drag state within the wellbore conduit, and to:
(i) maintain the drag-regulating structure in the low fluid drag state while a variable associated with the wellbore fluid stream is outside a threshold range; and
(ii) transition the dra

Assignees

• Tolman Randy C
• Tavarez Federico A
• Entchev Pavlin B
• Kumaran Krishnan
• Romer Michael C
• Exxonmobil Upstream Res Co

Inventors

• Tolman Randy C
• Tavarez Federico A
• Entchev Pavlin B
• Kumaran Krishnan
• Romer Michael C

Classifications

• E21B43/121 Primary

  Lifting well fluids (monitoring of down-hole pump systems E21B47/008) · CPC title

• E21B43/122

  Gas lift · CPC title

• E21B23/08

  Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems · CPC title