Method and apparatus for formation testing and sampling when performing subterranean operations
AssigneeHalliburton Energy Services, Inc.
InventorLizheng Zhang
Life of this patent
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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 well bore 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.
Claims20
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 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
- a mechanism selectively coupling one of the first isolation pad and the second isolation pad to the pad carrier.
A formation testing device comprising:
- a probe for obtaining formation samples, wherein the probe is operable to engage a pad carrier;
- a first isolation pad detachably couplable to the pad carrier, wherein the first isolation pad selectively isolates the probe when obtaining formation samples;
- and
- 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.
A machine readable medium accessible to an information handling system, the machine readable medium including instructions which enable the information handling system to:
- 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, 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;
- and
- 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.
A method of performing formation testing comprising:
- 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;
- and
- selectively coupling the first isolation pad to the pad carrier.
Dependencies are inferred from the claim text.