Title:
WELL JET DEVICE OPERATING METHOD ASSOCIATED WITH HYDRODYNAMIC ACTION PERFORMED ON A WELL BORE ZONE
Document Type and Number:
WIPO Patent Application WO/2004/040146
Kind Code:
A1
Abstract:
The invention relates to oil extraction devices. The inventive device operating method associated with a hydrodynamic action performed on the well bore area of a productive formation consists in running a shank, packer and a jet pump arranged on a tubing string into a well. The packer and the jet pump are placed above the formation top and the release of the packer is carried out. A working agent is periodically supplied to the jet pump nozzle by means of a pumping module. The jet pump operation is carried out in the following mode: the working agent is sharply supplied to the jet pump nozzle at a predetermined pressure of a pumping module thereby forming a required depression on the productive formation in several seconds. Said depression is maintained during a time ranging from 2 to 20 minutes and, afterwards the hydrostatic pressure of a liquid column is restored in a stepped manner in the well by liquid overflowing in the tail space, a hydraulic impact oriented towards the productive formation is produced and the clogging particles are removed by a sharp cut-off of the working liquid. The pressure of the liquid flow is set in such a way that it is higher than the formation pressure. The time of action of the hydrostatic pressure of the liquid column on the well bore area is set in such a way than it is lower by at least two times than the depression time. Afterwards the working agent is sharply resupplied to the jet pump nozzle, thereby making it possible to repeat said cycle. A check run of the well flow is carried out before and during the cyclic action performed on the well bore area. Two last check runs not displaying the increased production of the well, the work is over. Said invention is directed at the improvement of the operational reliability and the performance of the device.
Inventors:
KHOMYNETS ZINOVIY DMITRIEVICH (RU)
Application Number:
PCT/RU2003/000323
Publication Date:
May 13, 2004
Filing Date:
July 22, 2003
Export Citation:
Assignee:
KHOMYNETS ZINOVIY DMITRIEVICH (RU)
International Classes:
E21B28/00; E21B43/12; E21B43/18; F04F5/02; F04F5/46; F04F5/54; (IPC1-7): F04F5/54; E21B43/25
Foreign References:
| RU2176336C1 | 2001-11-27 | |||
| SU1668646A1 | 1991-08-07 | |||
| US4744730A | 1988-05-17 | |||
| US4293283A | 1981-10-06 |
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