Patent US2500051A successfully refreshed from Google Patents.
US3934455A
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US
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Apparatus for testing a sand sample
Assignee: Schlumberger Technology Corp
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Filing: 1974-02-13
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Granted: 1976-01-27
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Expires: 1994-02-13
Abstract
Abstract The apparatus disclosed herein is useful for testing unconsolidated sand samples from oil-bearing or gas-bearing earth formations. Basically, the device comprises a cylinder equipped with opposing pistons. The sand sample is placed in the cylinder between the pistons and then compacted by moving the pistons toward each other. The force for moving the pistons is supplied by a fluid, such as air or hydraulic oil, which is injected under pressure into a chamber defined in the cylinder behind each piston. The compacted sample is then subjected to various test procedures involving permeability measurements, consolidation tests, and flow studies.
Inventors
- 👤 William H. Harrisberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:37
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; G01N15/082; G01N33/00; G01N33/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
A method for testing a sand sample from a subsurface earth formation, which comprises the steps of: placing an unconsolidated sand sample in a rigid, closed cylindrical vessel; compacting the unconsolidated sand sample within the vessel to obtain a uniform pack by compressing the sample between a first piston and a second piston, the pistons being slidable toward each other within the vessel; and the diameter of the vessel, as related to the length of the sand sample, being a ratio of not more than 1 to 2; passing a first fluid through the compacted unconsolidated sand sample to determine flow permeability of the unconsolidated sand sample; passing a second and third fluids through the compacted, unconsolidated sand sample to condition the sand particles for accepting a fourth fluid which defines a consolidating fluid; directing the consolidating fluid into the sand sample to adhere the sand particles together, to thereby consolidate the sand sample; flushing the consolidated sand sample with a fifth fluid to remove consolidating fluid which is trapped in pore spaces between the sand particles; curing the consolidating fluid by heating the vessel to a temperature sufficient to cure the said consolidating fluid; and passing a sixth fluid through the compacted, consolidated sand sample to determine the flow permeability of the said consolidated sample.
Claim 2
Independent Claim
216 words
A method for testing a sand sample from a subsurface earth formation, which comprises the steps of: placing an unconsolidated sand sample in a rigid, closed cylindrical vessel; compacting the unconsolidated sand sample within the vessel to obtain a uniform pack by compressing the sample between a first piston and a second piston, the pistons being slidable toward each other within the vessel; and the diameter of the vessel, as related to the length of the sand sample, being a ratio of not more than 1 to 2; passing a first fluid through the compacted unconsolidated sand sample to determine flow permeability of the unconsolidated sand sample; passing a second and third fluids through the compacted, unconsolidated sand sample to condition the sand particles for accepting a fourth fluid which defines a consolidating fluid; directing the consolidating fluid into the sand sample to adhere the sand particles together, to thereby consolidate the sand sample; flushing the consolidated sand sample with a fifth fluid to remove consolidating fluid which is trapped in pore spaces between the sand particles; curing the consolidating fluid by heating the vessel to a temperature sufficient to cure the said consolidating fluid; and passing a sixth fluid through the compacted, consolidated sand sample to determine the flow permeability of the said consolidated sample.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |