Patent US2171198A successfully refreshed from Google Patents.
US4211280A
Expired / Lapsed
US
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Downhole surge tools, method and apparatus
Assignee: Individual
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Filing: 1979-05-15
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Granted: 1980-07-08
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Expires: 1999-05-15
Abstract
Abstract Downhole method and apparatus for efficient well completions wherein natural earth energy is utilized by the exploitation of a maximum pressure differential into a given well bore. The method and tools of the apparatus function to back surge the well, enhancing reservoir communication, saving time and reducing costs. Tools of the apparatus include a tubular nipple, a surge plug inserted operationally into the nipple, and an optional catcher sub connected thereto. The entire tool assembly is production actuated by dropping a recoverable bar of sufficient weight to overcome that buoyant force which seals the plug within the nipple. The essence of invention resides in the economy of time and material.
Inventors
- 👤 Robert D. Yeates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:28
CPC Classifications
E; E21; E21B; E21B37/00; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1294
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
131 words
For use with a well having a bore, a casing, and production perforations, a method of well completion comprising the steps of: (A) installing, on the downhole end of production tubing, below a production packer, a tubular nipple, said nipple having an ejectable non-frangible surge plug sealably disposed in the lower end thereof; (B) lowering the assembly of step (A) into the well bore, positioning said surge plug above the perforations; (C) positioning and setting the packer above said assembly; (D) drop bar ejecting said surge plug to provide a substantially instantaneous full opening at the bottom of the tubing, whereby a maximum pressure differential into the well bore is substantially instantaneously created, whereby fluid and particulate matter from the well bore and formation surge inwardly and upwardly through the tubing.
Claim 2
Dependent Claim
131 words
For use with a well having a bore, a casing, and production perforations, a method of well completion comprising the steps of: (A) installing, on the downhole end of production tubing, below a production packer, a tubular nipple, said nipple having an ejectable non-frangible surge plug sealably disposed in the lower end thereof; (B) lowering the assembly of step (A) into the well bore, positioning said surge plug above the perforations; (C) positioning and setting the packer above said assembly; (D) drop bar ejecting said surge plug to provide a substantially instantaneous full opening at the bottom of the tubing, whereby a maximum pressure differential into the well bore is substantially instantaneously created, whereby fluid and particulate matter from the well bore and formation surge inwardly and upwardly through the tubing.
Claim 3
Dependent Claim
21 words
A method according to claim 1, including the step of: (E) catching and retaining the ejected surge plug and drop bar.
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) | 1983-07-08 | 1984-01-07 | 1984-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-08 | 1988-01-07 | 1988-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-08 | 1992-01-07 | 1992-07-08 | $7700.00 | Window Closed / Lapsed |