Measuring and testing – Borehole or drilling – Downhole test
Patent
1987-08-20
1989-07-11
LaRoche, Eugene R.
Measuring and testing
Borehole or drilling
Downhole test
73155, 73152, 166264, E21B 4700
Patent
active
048459828
ABSTRACT:
In a formation tester constructed with an extendable probe driven by hydraulic means, the means being connected to a hydraulic circuit, an improved apparatus is set forth which includes a hydraulic fluid multiplier means. This multiplier means is connected between the pump and the means extending the probe and backup shoes. The multiplier means incorporates a step piston and a large cylinder having a step conforming with the piston. Suitable seals are placed on the piston. The piston drives initially to deliver a high volume low pressure flow to extend rapidly the probe, and completes its operation with a low volume high pressure flow to assure proper setting. This enables more rapid operation and more rapid completion of formation testing.
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Beard William J.
Halliburton Logging Services Inc.
Ham Seung
LaRoche Eugene R.
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