Wells – Processes – Sampling well fluid
Patent
1989-02-15
1989-11-07
Novosad, Stephen J.
Wells
Processes
Sampling well fluid
166297, 166332, 175 59, E21B 4908
Patent
active
048785385
ABSTRACT:
A perforate, test and sample tool for obtaining fluid samples from a formation reservoir in a well. The tool comprises a retrievable packer, perforating guns and a sampler disposed between the packer and guns which is adapted for entrapping a fluid sample without flowing well fluids into the tool string. An operating position is slidably disposed in a cylinder above the packer and is used to actuate a sampler valve in the sampler. A seal insures that all portions of a sampling chamber in the sampler are disposed below the packer. In one embodiment, the operating piston is actuated in response to a pressure differential between a well annulus above the packer and an internal pressure in the tool. The sampler includes a plurality of sampler modules disposed in the sampling chamber. Each of the sampler modules includes a valve which automatically closes after a predetermined volume of fluid fills a sampler module chamber defined in the sampler module. Testing gauges may be disposed in the sampler adjacent the sampler modules. A shear pin holds the operating piston and sampler valve in a first closed position as the tool in run into the hole, and a locking dog assembly is used to lock the operating piston and sampler in a second closed position after the sampling chamber has been filled. A method of using the perforate, test and sample tool is also disclosed.
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Halliburton Services Sales & Service Catalog No. 43, pp. 2533 and 2534, published 1985.
Vann Systems Engineered Well Completion Product Catalog, p. B-22.
Duzan James R.
Halliburton Company
Kennedy Neal R.
Melius Terry Lee
Novosad Stephen J.
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