Method and apparatus for formation testing and sampling when performing subterranean operations
First Claim
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1. A formation tester tool comprising:
- a pad carrier coupled to a tool body, wherein the pad carrier is radially movable relative to the tool body;
a first isolation pad and a second isolation pad detachably coupled to the tool body, wherein each of the first isolation pad and the second isolation pad is axially movable along the tool body, and wherein the first isolation pad is retractable from an extended position such that the first isolation pad is replaceable by the second isolation pad while the formation tester tool is downhole; and
a mechanism selectively coupling one of the first isolation pad and the second isolation pad to the pad carrier.
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Abstract
Methods and systems for improving operations of a formation tester are disclosed. The formation tester (400) is placed in a wellbore at a location of interest. The formation tester comprises a first isolation pad (402) coupled to a pad carrier (410) and a second isolation pad (404). The first isolation is extendable to substantially seal a probe of the formation tester against a wellbore wall. The first isolation pad is then replaced with the second isolation pad if it is determined that the first isolation pad should be replaced with the second isolation pad.
15 Citations
20 Claims
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1. A formation tester tool comprising:
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a pad carrier coupled to a tool body, wherein the pad carrier is radially movable relative to the tool body; a first isolation pad and a second isolation pad detachably coupled to the tool body, wherein each of the first isolation pad and the second isolation pad is axially movable along the tool body, and wherein the first isolation pad is retractable from an extended position such that the first isolation pad is replaceable by the second isolation pad while the formation tester tool is downhole; and a mechanism selectively coupling one of the first isolation pad and the second isolation pad to the pad carrier. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A formation testing device comprising:
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a pad carrier coupled to a tool body of the formation testing device, wherein the pad carrier is radially movable relative to the tool body; a probe sealable to a wall downhole, wherein the probe is detachably engageable with the pad carrier; a first isolation pad detachably coupled to the pad carrier and engageable with the probe, wherein the first isolation pad selectively isolates the probe when obtaining formation samples; a first protective guard, wherein the first protective guard substantially covers the first isolation pad when the first isolation pad is detached from the pad carrier; and a second isolation pad detachably couplable to the pad carrier, and wherein the first isolation pad is retractable from an extended position to disengage from the probe such that the first isolation pad is replaceable by the second isolation pad while the formation tester tool is downhole. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A non-transitory machine readable medium accessible to an information handling system, the machine readable medium including instructions which enable the information handling system to:
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place a formation tester in a wellbore at a location of interest, wherein the formation tester comprises a first isolation pad and a second isolation pad, wherein at least one of the first isolation pad and the second isolation pad is couplable to a pad carrier, wherein the pad carrier is radially movable relative to a tool body of the formation tester, and wherein the pad carrier is extendable to permit at least one of the first isolation pad and the second isolation pad to substantially seal a probe of the formation tester against a wall of the wellbore; selectively couple one of the first isolation pad and the second isolation pad to the pad carrier; extend the pad carrier, wherein one of the first isolation pad and the second isolation pad substantially seals the probe of the formation tester against the wall of the wellbore when the pad carrier extends; retract the pad carrier; slide the one of the first isolation pad and the second isolation pad relative to the pad carrier; and replace the one of the first isolation pad and the second isolation pad.
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15. A method of performing formation testing comprising:
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placing a formation tester in a wellbore at a location of interest, wherein the formation tester comprises a first isolation pad and a second isolation pad coupled to a tool body; the formation tester comprises a pad carrier that is radially extendable from the tool body to substantially seal a probe of the formation tester against a wall of the wellbore; and the first isolation pad and the second isolation pad are selectively couplable to the pad carrier; coupling the first isolation pad to the pad carrier; engaging the first isolation pad with the probe; performing a formation test; and replacing the first isolation pad with the second isolation pad. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification