Title:
METHOD AND DEVICE FOR REESTABLISHMENT OF CIRCULATION IN AN OPERATING WELL
Document Type and Number:
WIPO Patent Application WO/1993/013292
Kind Code:
A1
Abstract:
In a well for example in a column of riser pipes (1), a hydromechanical cleaner (3) is descended on a pipe column (2). The plug (4) is subjected to the jet effect of the direct downward flow of washing liquid pumped down through the pipe column (2), so as to wash it out. As the plug is washed out, the cleaner (3) is moved down by advancing the pipe column (2). The rising flow of the washing liquid turns cleaning heads (5, 6) in opposite directions. Cutting blade elements of the heads (5, 6) provide for mechanical removal of sediment from the walls of the column of riser pipes (1). The mechanical removal of the sediment from the walls is effected both during lowering and raising of the cleaner (3). The product of plug (4) disintegration and the sediments are removed by the ascending flow through a lateral tapping sleeve (41) of a face washing head (18). A device for implementation of the method further comprises a mechanism for moving the pipe column (2) as well as pumping equipment.
Inventors:
EFIMKIN ALEXEI ALEXEEVICH (RU)
Application Number:
PCT/RU1992/000223
Publication Date:
July 08, 1993
Filing Date:
December 01, 1992
Export Citation:
Assignee:
EFIMKIN ALEXEI A (RU)
International Classes:
E21B21/00; E21B33/068; E21B19/10; E21B37/00; E21B37/04; E21B41/00; (IPC1-7): E21B21/00; E21B37/00
Foreign References:
| SU1686131A1 | 1991-10-23 | |||
| US4747452A | 1988-05-31 | |||
| US4705107A | 1987-11-10 | |||
| US4518041A | 1985-05-21 |
Attorney, Agent or Firm:
Filippov, Vladimir Fedorovich (34 ap. 74, Respublika Kom, Uchta 0, SU)
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