Abstract: A system can include an outer housing, a customized housing, and centralizing elements. The outer housing can define an inner diameter. The customized housing can be positioned approximately concentrically within the outer housing. The customized housing can include slots arranged spaced-apart around an outer diameter of the customized housing. Each slot of the plurality of slots can be sized to receive one or more centralizing elements. The centralizing elements can include the one or more centralizing elements. Each centralizing element can be sized to be positioned in a corresponding slot of the slots and to contact the inner diameter of the outer housing while located in the corresponding slot.

Abstract: A formation tester tool includes an extendable probe having an extendable member configured to extend from a retracted position to an extended position such that an end of the extendable probe is in fluid communication with a wall of a borehole during an operation to capture a fluid from a formation. The formation tester tool also includes a sealing pad positioned circumferentially around the extendable probe, wherein a face of the sealing pad is configured to sealingly engage the wall of the borehole while the extendable member is in the extended position. The formation tester tool also includes a shield to cover the sealing pad in a covered position between the sealing pad and the wall of the borehole.

Abstract: A formation tester tool assembly includes a seal member mounted on rigid stabilizer that contacts a borehole wall separately from the seal member, so that seal exposure to a stabilization load that presses the tool against the borehole wall is limited or reduced by contact engagement of the stabilizer with the borehole wall. The stabilizer is provided by a hydraulically actuated probe piston reciprocally movable relative to a tool body on which it is mounted. The seal member is in some embodiments movable relative to the probe piston, for example being configured for hydraulic actuation to sealingly engage the borehole wall while the tool body is stabilized by action of the probe piston.

Abstract: A formation tester tool includes an extendable probe having an extendable member configured to extend from a retracted position to an extended position such that an end of the extendable probe is in fluid communication with a wall of a borehole during an operation to capture a fluid from a formation. The formation tester tool also includes a sealing pad positioned circumferentially around the extendable probe, wherein a face of the sealing pad is configured to sealingly engage the wall of the borehole while the extendable member is in the extended position. The formation tester tool also includes a shield to cover the sealing pad in a covered position between the sealing pad and the wall of the borehole.

Abstract: A formation tester tool assembly includes a seal member mounted on rigid stabilizer that contacts a borehole wall separately from the seal member, so that seal exposure to a stabilization load that presses the tool against the borehole wall is limited or reduced by contact engagement of the stabilizer with the borehole wall. The stabilizer is provided by a hydraulically actuated probe piston reciprocally movable relative to a tool body on which it is mounted. The seal member is in some embodiments movable relative to the probe piston, for example being configured for hydraulic actuation to sealingly engage the borehole wall while the tool body is stabilized by action of the probe piston.