CN214196275U

CN214196275U - Concentric double-tube jet pump with novel sealing plug structure

Info

Publication number: CN214196275U
Application number: CN202023067695.5U
Authority: CN
Inventors: 张树华; 刘振浩; 王雷雷
Original assignee: Shengli Oilfield Longdi Petroleum Technology Equipment Co ltd
Current assignee: Shengli Oilfield Longdi Petroleum Technology Equipment Co ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-09-14
Anticipated expiration: 2030-12-18

Abstract

The utility model provides a concentric double-barrelled jet pump with novel sealing plug structure belongs to the jet pump that oil field oil recovery used, installs sealing plug between the upper portion of inner pump section of thick bamboo and the upper portion of pump core, and sealing plug's lower extreme downwardly extending to the higher authority of stratum hydraulic fluid hybrid chamber installs the sealing ring between the upper end outside of sealing plug and the inner pump section of thick bamboo upper end inboard, installs lower sealing ring between sealing plug's the lower part inboard and the pump core outer wall. The jet pump has reasonable sealing structure, the pressure difference between the upper side and the lower side of the upper sealing ring is greatly reduced, and the pressure of the mixed liquid is greater than the pressure of the stratum liquid. During operation, the sealing plug is subjected to downward resultant force, so that the sealing plug works more stably, the sealing working condition on the sealing plug is greatly improved while the sealing is more reliable, and the sealing plug is effectively prevented from being separated from the inner pump barrel.

Description

Concentric double-tube jet pump with novel sealing plug structure

Technical Field

The utility model provides a jet pump that oil field oil recovery used, especially a concentric double-barrelled jet pump of modified.

Background

The concentric double-pipe jet pump drainage and production process has wide application range in the crude oil production process. The process uses high-pressure water as power liquid to drive an underground jet pump to work, and achieves the purpose of lifting a shaft by energy conversion between the power liquid and produced liquid. The high-pressure power fluid flows down along the power fluid pipe column through the well mouth and enters the underground jet pump, when the power fluid passes through the underground pump nozzle, the energy of the power fluid is converted into kinetic energy by pressure energy, the pressure is sharply reduced, and a relatively low-pressure area is formed around the nozzle. Under the action of the formation pressure, the formation liquid enters the pump through the tail pipe and flows to a relatively low-pressure area, and then enters the throat pipe after being mixed with the high-speed jet liquid at the outlet of the nozzle, so that mixed liquid is formed in the throat pipe. The formation liquid obtains sufficient energy from the power liquid and is gradually pressurized, namely, at the throat, the liquid mixed by the power liquid and the formation liquid is converted into pressure energy from kinetic energy and tends to be consistent at the boundary of the diffusion tube, and the mixed liquid is lifted to the ground along the mixed liquid pipe column. As shown in fig. 1, in the conventional concentric dual-tube jet pump, the original sealing plug 4 is located inside the upper end of the inner pump barrel, and has a short length, and the lower end of the original sealing plug is located above the boss 15 protruding inwards in the inner pump barrel. The upper and lower cavities are sealed and separated by a lower sealing ring 6 between the inner wall of the inner pump cylinder 7 and the pump core 8, the upper part is high-pressure power liquid, and the lower part is relatively low-pressure stratum liquid. Meanwhile, an upper sealing ring 5 between the original sealing plug 4 and the inner wall of the pump barrel separates an upper cavity from a lower cavity, namely a relative low-pressure mixed liquid cavity 11 at the upper part and a high-pressure power liquid cavity 12 at the lower part. The upper end of the original sealing plug is positioned in the low-pressure mixed liquid cavity, and the lower end of the original sealing plug is positioned in the high-pressure power liquid cavity. The power hydraulic pressure in the high-pressure power liquid cavity is far greater than the mixed hydraulic pressure in the low-pressure mixed liquid cavity. Under the action of the pressure difference, the original sealing plug is subjected to upward lifting force, so that the sealing plug tends to move upwards. When the lifting force is greater than the gravity of the inner oil pipe 2, the original sealing plug can be separated from the inner pump barrel, and the jet pump cannot continue to produce normally. This is particularly common in shallow or horizontal wells.

Disclosure of Invention

The utility model aims to solve the technical problem that a concentric double-barrelled jet pump with novel sealing plug structure is provided, it can prevent effectively that sealing plug from deviating from interior pump barrel.

The utility model discloses a realize like this, a concentric double-barrelled jet pump with novel sealing plug structure, it has outer pump barrel, has rather than integrative interior pump barrel in the outer pump barrel, installs the pump core in the interior pump barrel, and the lower extreme of outer pump barrel is fixed with the tail pipe, installs the standing valve in the tail pipe the upper portion of interior pump barrel and the upper portion of pump core between install sealing plug, sealing plug's lower extreme downwardly extending to the higher authority of stratum hydrodynamic force liquid hybrid chamber, installs the upper seal ring between sealing plug's the upper end outside and interior pump barrel upper end inboard, installs lower sealing ring between sealing plug's the lower part inboard and the pump core outer wall.

The concentric double-pipe jet pump adopting the structure has reasonable sealing structure, the pressure difference between the upper side and the lower side of the upper sealing ring is greatly reduced, and the pressure of the mixed liquid is greater than the pressure of the stratum liquid. When the jet pump works, the sealing plug is subjected to downward resultant force, so that the sealing plug works more stably, the sealing working condition on the sealing plug is greatly improved while the sealing is more reliable, and the sealing plug is effectively prevented from being separated from the inner pump barrel.

Drawings

Fig. 1 is a schematic diagram of a conventional concentric dual tube jet pump configuration.

Fig. 2 is a schematic diagram of the structure of the concentric double-tube jet pump of the present invention.

In the figure, 1, an outer oil pipe; 2. an inner oil pipe; 3. an outer pump barrel; 4. original sealing plug; 5. an upper seal ring; 6. a lower seal ring; 7. an inner pump barrel; 8. a pump core; 9. a fixed valve; 10. a tail pipe; 11. a relatively low pressure mixing fluid chamber; 12. a high pressure power fluid chamber; 13. sealing the plug; 14. a mixing chamber; 15. and (4) a boss.

Detailed Description

The following description will explain specific configurations of the present invention with reference to the embodiments shown in the drawings.

As shown in the attached drawing, the utility model relates to a concentric double-barrelled jet pump with novel sealing plug structure, it has outer pump barrel 3, has rather than integrative interior pump barrel 7 in the outer pump barrel, installs pump core 8 in the interior pump barrel, and the lower extreme of outer pump barrel is fixed with tail pipe 10, installs standing valve 9 in the tail pipe the upper portion of interior pump barrel 7 and the upper portion of pump core 8 between install sealing plug 13, sealing plug's lower extreme downwardly extending to the higher authority of high pressure power liquid chamber 12, install upper seal ring 5 between sealing plug's the upper end outside and the interior pump barrel upper end inboard, install lower seal ring 6 between sealing plug's the lower part inboard and the pump core outer wall.

The utility model discloses with sealing plug extension, lower sealing ring changes to between sealing plug and the pump core from between interior pump barrel and the pump core. The upper part of the sealing plug is positioned in the relatively low-pressure mixed liquid cavity 11 and is contacted with the relatively low-pressure mixed liquid, the lower part of the sealing plug is positioned in the mixed cavity 14 and is contacted with the relatively low-pressure stratum liquid, the power hydraulic pressure is far greater than the pressure of the mixed liquid, the pressure of the mixed liquid is greater than the pressure of the stratum liquid, and the pressure difference between the upper side and the lower side of the lower sealing ring is greatly reduced. When the jet pump works, the sealing plug is subjected to downward resultant force, and after the pressure difference between the upper side and the lower side of the sealing plug is reduced, the use condition of the sealing structure is improved, the working of the sealing plug is more stable, and the sealing is more reliable.

When the oil pump is used, the upper end of the outer pump cylinder is installed together with the outer oil pipe 1, and the upper end of the sealing plug is installed together with the inner oil pipe.

Except for the sealing structure, the other structures of the concentric double-tube jet pump and the working principle thereof are the same as the prior one, and are not detailed.

The above-mentioned embodiments are only one of the preferred embodiments of the present invention, and the general changes and substitutions performed by those skilled in the art within the technical scope of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a concentric double-barrelled jet pump with novel sealing plug structure, it has outer pump barrel (3), has rather than integrative interior pump barrel (7) in the outer pump barrel, installs pump core (8) in the interior pump barrel, and the lower extreme of outer pump barrel is fixed with tail pipe (10), installs standing valve (9) in the tail pipe, its characterized in that the upper portion of interior pump barrel (7) and the upper portion of pump core (8) between install sealing plug (13), the lower extreme downwardly extending of sealing plug to the higher authority of high-pressure power liquid chamber (12), install upper seal ring (5) between the upper end outside of sealing plug and the interior pump barrel upper end inboard, install lower seal ring (6) between the lower part inboard of sealing plug and the pump core outer wall.