Title:
DOWNHOLE SUCKER-ROD PUMPING PLANT
Document Type and Number:
WIPO Patent Application WO/2004/099618
Kind Code:
A1
Abstract:
The inventive pumping plant can be used for pump engineering, the mining, petroleum and gas industries for extracting liquid from wells. Said pumping plant is provided with two cavities which are arranged in each hollow rod, isolated from each other, vacuumed or filled with a gas. Said roads are made of a low-density metal, for example corrosion-protected high-strength aluminium or titanium alloys. The internal cavities of said hollow rods comprise liquid-tight plugs which are rigidly connected to the end thereof in such a way that adapters are formed for connecting said hollow rods to demountable connectors. The hollow rods are provided with charging devices for filling the internal cavities with a pressure gas. Said charging device is arranged in the lower part of the hollow rod and a closer is disposed at the entry thereof in such a way that it is removable during filling the internal cavities with the gas. The fact that said pumping plant is provided with the rods which have low specific weight due to a correct material selection makes it possible to produce the rods with small external diameter, increase the depth of pumping by means of downhole sucker-rod pumping plants, decrease the load applied to a drive mechanism, reduce the size and weight thereof and to simplify the requirements to a balancing unit or do not use it at all.
Inventors:
EYSYMONTT SVETLANA ANATOLEVNA (RU)
Application Number:
PCT/RU2004/000159
Publication Date:
November 18, 2004
Filing Date:
April 27, 2004
Export Citation:
Assignee:
EYSYMONTT SVETLANA ANATOLEVNA (RU)
International Classes:
F04B47/02; (IPC1-7): F04B47/02
Foreign References:
| RU2169250C1 | 2001-06-20 | |||
| RU2117132C1 | 1998-08-10 | |||
| GB2163465A | 1986-02-26 | |||
| EP0145154A1 | 1985-06-19 |
Other References:
MOLCHANOV A.G. ET AL.: "+B28 Neftepromyslovye mashiny i mekhanizmy", NEDRA, 1976, pages 39
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