Test dart system and method
First Claim
1. A test dart for wellbore pressure isolation, comprising:
- a body extending from a first end to a second end, the body having a bore extending therethrough, a diameter of the bore being greater at the first end than the second end;
a groove formed proximate the first end and extending radially outward from the bore and into the body;
an anti-rotation pin positioned between the groove and the second end, the anti-rotation pin extending radially outward from the body;
a check valve positioned in the bore, the check valve enabling a flow in a single direction and being moveable between an open position to enable the flow and a closed position to block the flow; and
a pressure relieving orifice in the bore extending radially outwardly into the body.
3 Assignments
0 Petitions
Accused Products
Abstract
Embodiments of the present disclosure include a test dart for wellbore pressure isolation. The test dart includes a body extending from a first end to a second end, the body having a bore extending therethrough, a diameter of the bore being greater at a first end than the second end. The test dart also includes a groove formed proximate the first end and extending radially outward from the bore and into the body. Additionally, the test dart includes an anti-rotation pin positioned between the groove and the second end, the anti-rotation pin extending radially outward from the body. The test dart further includes a check valve positioned in the bore, the check valve enabling flow in a single direction and being moveable between an open position to enable the flow and a closed position to block the flow.
18 Citations
18 Claims
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1. A test dart for wellbore pressure isolation, comprising:
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a body extending from a first end to a second end, the body having a bore extending therethrough, a diameter of the bore being greater at the first end than the second end; a groove formed proximate the first end and extending radially outward from the bore and into the body; an anti-rotation pin positioned between the groove and the second end, the anti-rotation pin extending radially outward from the body; a check valve positioned in the bore, the check valve enabling a flow in a single direction and being moveable between an open position to enable the flow and a closed position to block the flow; and a pressure relieving orifice in the bore extending radially outwardly into the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for isolating regions of a wellbore, the system comprising:
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a unidirectional valve positioned in the wellbore, the unidirectional valve permitting a fluid flow in a downstream direction into the wellbore and restricting the fluid flow in an upstream direction out of the wellbore; a test dart non-rotationally coupled to the unidirectional valve via a gravitational force acting on the test dart, the test dart arranged upstream of the unidirectional valve and positioned to block the fluid flow in the downstream direction toward the unidirectional valve; and a removal tool, the removal tool non-rotationally coupling to the test dart and positioned to remove the test dart in a non-controlled wellbore environment via a linear force. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for isolating a wellbore, the method comprising:
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lowering a test dart into the wellbore, the test dart being coupled to an installation tool; non-rotationally coupling the test dart to a unidirectional valve arranged in the wellbore via a gravitational force acting on the test dart; decoupling the installation tool from the test dart; lowering a removal tool into the wellbore to retrieve the test dart; non-rotationally coupling the removal tool to the test dart; and withdrawing the test dart from the wellbore. - View Dependent Claims (17, 18)
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Specification