Wells – Processes – Placing or shifting well part
Patent
1997-02-03
1998-10-27
Schoeppel, Roger J.
Wells
Processes
Placing or shifting well part
166187, 166191, 16625017, E21B 3312
Patent
active
058266623
ABSTRACT:
Method and apparatus for testing and sampling open-hole oil and gas wells. The apparatus includes a packer, a surge chamber, a closure valve which may be opened to flow fluid into the surge chamber, and a sampler. The surge chamber may be one of a pair of surge chambers, and the closure valve may be one of a pair of closure valves so that two surges may be carried out prior to obtaining a fluid sample in the sampler. In operation, the packer is placed in a set position by setting down weight. The closure valves are also actuated when weight is set down. The first closure valve has a first predetermined time delay before opening so that the packer may be set, and the second closure valve has a second predetermined time delay so that the packer may be set and the first closure valve opened before a fluid sample is captured. By opening a vent tool at an upper end of the uppermost surge chamber, formation fluid may be forced back into the formation or zone of interest by a bull-heading operation. In a preferred embodiment, portions of the apparatus are detachable in the event of sticking of the apparatus in the well. In the method of the two-surge test, a clean fluid sample for capturing in the sampler is provided. All of the steps are carried out without flowing fluid to the surface.
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Beck Harold K.
Ringgenberg Paul D.
Schultz Roger L.
Setliff Rodney R.
Halliburton Energy Service,s Inc.
Herman Paul I.
Kennedy Neal R.
Schoeppel Roger J.
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