US4450907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning system for packer removal
Assignee: Halliburton Co
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Filing: 1982-07-19
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Granted: 1984-05-29
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Expires: 2002-07-19
Abstract
Abstract This invention relates to a system for cleaning debris and precipitated materials from above a packer in a well bore. The tool includes a special overshot which attaches to a cut off tubing on a packer. The overshot has a closed off bore and a side opening which is coupled to a tubing string. A cleaning tool is pumped down the tubing and has a flexible tubing which passes through the side opening. Fluid can be circulated from the tubing to the annulus and remove precipitates. The cleaning tool has a collar location for position alignment.
Inventors
- 👤 James M. Clark
- 👤 Tony M. Small
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:28
CPC Classifications
E; E21; E21B; E21B21/00; E21B23/00; E21B23/08; E21B37/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
183 words
Apparatus for cleaning material from a location above a packer means in a well bore including: an overshot means having a lower opening sized and constructed to be received over a cut end of a tubing string attached to a packer means; said overshot means being adapted for coupling to a string of tubing and having a closed off bore portion above said lower open end, said overshot means having a bore above said closed end and said overshot means having an opening through its side in communication with said bore above said closed end; a well cleaning tool adapted to be passed through a string of tubing attached to said overshot, said well cleaning tool having a depending flexible hose member below said packing means, said hose member being sized and constructed to pass through said opening in said overshot means; means placing said hose member in fluid communication with the tubing above said packing means whereby fluid may be discharged through said hose to agitate materials into the fluid in the well bore annulus between the tubing string and well casing.
Claim 2
Dependent Claim
183 words
Apparatus for cleaning material from a location above a packer means in a well bore including: an overshot means having a lower opening sized and constructed to be received over a cut end of a tubing string attached to a packer means; said overshot means being adapted for coupling to a string of tubing and having a closed off bore portion above said lower open end, said overshot means having a bore above said closed end and said overshot means having an opening through its side in communication with said bore above said closed end; a well cleaning tool adapted to be passed through a string of tubing attached to said overshot, said well cleaning tool having a depending flexible hose member below said packing means, said hose member being sized and constructed to pass through said opening in said overshot means; means placing said hose member in fluid communication with the tubing above said packing means whereby fluid may be discharged through said hose to agitate materials into the fluid in the well bore annulus between the tubing string and well casing.
Claim 3
Dependent Claim
28 words
The apparatus as set forth in claim 1 wherein said overshot means has an inclined guiding surface connecting the tubing bore above the closed end to said opening.
Claim 4
Dependent Claim
26 words
The apparatus as set forth in claim 2 wherein said well cleaning tool includes a collar locator and a tubular perforated pipe above said packing means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |