Test packer and method for use
A downhole tool having a throughbore is disclosed for use in a tubular located in a wellbore. The downhole tool has a sealing element configured to seal an annulus between the downhole tool and an inner wall of the tubular; at least one flow path formed in the downhole tool, wherein the flow path is configured to allow fluids in the annulus to flow past the sealing element when the sealing element is in a sealed position; and at least one valve in fluid communication with the flow path and configured to allow the fluids to flow through the flow path in a first direction while preventing the fluids from flowing through the flow path in a second direction. A guard may be installed proximate anchor elements. The guard extends radially beyond an outer diameter of the anchor elements when the anchor elements are in a retracted position.
1. A method for displacing fluid within a tubular, the method comprising:
running a downhole tool into the tubular, the downhole tool including an axial throughbore, a first fluid bypass, a second fluid bypass and a sealing element;
displacing a first fluid in an annulus defined between the downhole tool and an inner wall of the tubular through the first fluid bypass while the sealing element is not in sealing engagement with the inner wall of the tubular;
engaging the inner wall of the tubular with the sealing element, thereby sealing the annulus between the downhole tool and the inner wall of the tubular; and
displacing the first fluid in the annulus between the downhole tool and the inner wall of the tubular around the sealing element through the second fluid bypass while the sealing element is in sealing engagement with the inner wall of the tubular, wherein the first fluid is permitted to flow through the second fluid bypass in a first direction, but the first fluid is prevented from flowing through the second fluid bypass in a second direction opposite the first direction.
2. The method of claim 1 , further comprising:
running the downhole tool to a location proximate a liner overlap; and
pressure testing the liner overlap.
3. The method of claim 2 , wherein the pressure testing is performed with a second fluid.
4. The method of claim 3 , further comprising pumping the second fluid and thereby displacing the first fluid through the second fluid bypass.
5. The method of claim 1 , wherein, when the sealing element is not in sealing engagement with the inner wall, the second fluid bypass is closed.
6. The method of claim 5 , wherein closing the second fluid bypass further comprises closing a valve in the second fluid bypass.
7. The method of claim 1 , wherein, when the sealing element is in sealing engagement with the inner wall, the first fluid bypass is closed.
8. The method of claim 7 , further comprising closing the first fluid bypass upon actuation of the sealing element.
9. The method of claim 8 , wherein the first fluid bypass closing further comprises moving a sleeve.
10. The method of claim 1 , further comprising supporting the sealing element with a mandrel on the downhole tool.
11. The method of claim 10 , further comprising housing the second fluid bypass in a flow path mandrel.
12. The method of claim 11 , wherein the flow path mandrel is supported by the mandrel radially outward of the mandrel.
13. The method of claim 10 , further comprising preventing relative rotation between the mandrel and at least one portion of the downhole tool.
14. The method of claim 13 , wherein the step of preventing relative rotation between the mandrel and at least one portion of the downhole tool comprises engaging at least one key with at least one key slot.
15. The method of claim 1 , further comprising:
displacing the first fluid through the axial throughbore of the downhole tool, and through the annulus between the downhole tool and the tubular;
displacing a second fluid through the axial throughbore of the downhole tool and below the sealing element; and
displacing the second fluid in the first direction from below the sealing element to above the sealing element through the second fluid bypass.
16. The method of claim 15 , wherein the step of displacing the second fluid from below the sealing element to above the sealing element substantially displaces the first fluid from below the sealing element.
17. The method of claim 15 , wherein the step of running the downhole tool comprises disposing the downhole tool at a location proximate a liner overlap, and pressure testing the liner overlap.
18. The method of claim 17 , wherein the pressure testing comprises pressure testing the liner overlap with the second fluid.
19. The method of claim 15 , further comprising preventing the second fluid from flowing in the second direction from above the sealing element to below the sealing element.
20. The method of claim 19 , wherein the step of preventing the second fluid from flowing in the second direction comprises closing a valve in the second fluid bypass.
21. The method of claim 15 , further comprising supporting the sealing element with a mandrel on the downhole tool.
22. The method of claim 1 , wherein the step of running the downhole tool comprises displacing the first fluid around the sealing element through the first fluid bypass.
23. The method of claim 1 , further comprising prohibiting fluid flow through the first fluid bypass upon actuation of the sealing element.