CN217481519U - Venturi injection type plunger tool - Google Patents

Abstract

The utility model discloses a venturi injection type plunger instrument, it includes the plunger body, the plunger body salvages the neck in including and salvages the plunger body that the neck is connected with interior beating, the chamber of salvaging has been seted up to the inside of interior fishing neck, the cavity with salvaging the chamber intercommunication is seted up to the inside of the plunger body, the cavity is including the last cavity and the lower cavity of intercommunication, salvage chamber and last cavity intercommunication, it is provided with the venturi chamber that is used for producing the venturi effect to go up between cavity and the lower cavity, the cross-sectional diameter of venturi chamber is less than the cross-sectional diameter of last cavity and lower cavity. The utility model discloses an at the inside cavity that sets up of plunger, reduce plunger weight, and communicate about the cavity, reduce the pressure of liquid in the oil pipe to the plunger, improve the falling speed of plunger in the oil pipe.

Description

Venturi injection type plunger tool

Technical Field

The utility model relates to a plunger gas lift technical field, concretely relates to venturi injection type plunger instrument.

Background

Plunger gas lift is widely applied to various large oil and gas fields at present as a gas well drainage and gas production process. The plunger gas lift drainage gas production process is characterized in that a plunger is put in an oil pipe of a gas well, the plunger is pushed to reciprocate in the oil pipe by using the self energy of the gas well, periodic liquid lifting is realized, and the plunger is used as a mechanical interface, so that gas upward channeling and liquid slippage can be effectively prevented, and the lifting efficiency is improved.

Under normal conditions, the operation cycle of the plunger is divided into three stages, namely shut-in time, which is the time for the plunger to fall from a wellhead blowout preventer to the position of an underground retainer after a pneumatic membrane valve or an electric valve is closed; plunger rising time-the time for the plunger to rise to the wellhead lubricator after the pneumatic membrane valve or the electric valve is opened; free-wheeling time-the time the plunger rises until it is still open after the lubricator is sensed by the plunger arrival sensor. In the practical application process, because the clearance between the plunger and the oil pipe is small, the falling speed of the plunger is low, the falling speed of the conventional column plunger in laboratory data in a straight well with 238 oil pipes is 12.5m/min, namely the time for the plunger to pass through the liquid column is 80min in a well with the liquid column of 1000m, and the plunger is required to be set to fall to the position of a bottom hole clamping device from a wellhead blowout-preventing pipe when the oil pipe is put into a deep well with higher pressure.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem among the prior art, the utility model provides a venturi injection type plunger instrument has solved current plunger at shut-in operation period, the slow problem of plunger whereabouts speed in oil pipe.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a venturi jet type plunger tool is provided, comprising a plunger body;

the plunger body salvages the neck in including and salvages the plunger body that the neck is connected with interior, and the cavity of salvaging has been seted up to the inside of interior fishing neck, and the cavity with salvaging the chamber intercommunication is seted up to the inside of plunger body, and the cavity is including the last cavity and the lower cavity of intercommunication, salvages cavity and last cavity intercommunication, goes up to be provided with the venturi chamber that is used for producing the venturi effect between cavity and the lower cavity, and the cross-sectional diameter of venturi chamber is less than the cross-sectional diameter of last cavity and lower cavity.

The utility model discloses a set up the cavity in that the plunger is inside, reduce plunger weight, and the cavity communicates from top to bottom, reduces the interior liquid of oil pipe to the pressure of plunger, improves the falling speed of plunger in the oil pipe.

Furthermore, a plurality of layers of grooves are formed in the outer wall of the plunger body.

Furthermore, the depths of the plurality of layers of grooves on the outer wall of the plunger body are gradually decreased from bottom to top.

Further, the side wall of the groove on one side of the groove is arc-shaped.

Furthermore, a plurality of injection holes are formed in the groove of the lower chamber.

Further, the injection hole is arranged in a tangential direction of the circumference of the lower chamber.

Furthermore, a clamping groove is formed at the inlet of the fishing cavity.

The utility model discloses a venturi injection type plunger instrument, its beneficial effect is:

1. the utility model discloses an at the inside cavity that sets up of plunger, reduce plunger weight, and communicate about the cavity, reduce the pressure of liquid in the oil pipe to the plunger, improve the falling speed of plunger in the oil pipe.

2. The utility model discloses a set up the venturi chamber in the inside cavity of plunger, produce the venturi effect, form gas seal, make the plunger when ascending in the oil pipe, reduce plunger upper portion liquid slippage, improve the plunger and lift liquid efficiency.

3. The utility model discloses a set up the venturi chamber in the inside cavity of plunger, produce the venturi effect, make pressure reduction more than the last cavity of plunger, and be less than lower cavity, improve the rising speed of plunger.

4. The utility model discloses set up the recess on the plunger body outer wall of plunger body, make the gas flow velocity distribution through the plunger body outer wall even, the plunger rises more steadily.

5. The utility model discloses a cooperation of cavity and jet orifice, high-speed air current pass through behind the cavity from the high-speed torrent gas of jet orifice blowout, make the plunger rotatory in the oil pipe pipeline to realize the plunger and work placed in the middle in the oil pipe pipeline, make the plunger also can rise placed in the middle in highly deviated well section, prevent that the eccentric wear phenomenon from appearing in the plunger.

6. The utility model discloses be provided with interior fishing neck, when the plunger can't rise to the well head, when needing to carry out the steel wire operation and go into fishing tool down and salvage the plunger, the later stage of being convenient for is salvaged.

Drawings

Fig. 1 is a schematic structural diagram of a venturi injection type plunger tool according to the present invention.

Fig. 2 is a schematic cross-sectional view of a venturi-jet plunger tool according to the present invention.

Fig. 3 is a transverse cross-sectional view of the lower chamber of the present invention.

Wherein, 1, the plunger body; 2. an inner fishing neck; 21. fishing a cavity; 22. a card slot; 3. a plunger body; 31. a cavity; 311. an upper chamber; 312. a venturi chamber; 313. a lower chamber; 32. a groove; 321. the side wall of the groove; 33. and ejecting the hole.

Detailed Description

The description of the embodiments of the invention is given for the sake of clarity and understanding by those skilled in the art, and it is to be understood that the invention is not limited to the details of the embodiments, but rather, to those skilled in the art, it is intended that all changes and modifications within the spirit and scope of the invention be embraced by the appended claims.

According to the first embodiment of the present application, referring to fig. 1 and 2, the venturi jet type plunger tool of the present embodiment includes a plunger body 1.

The plunger body 1 comprises an inner fishing neck 2 and a plunger body 3 connected with the inner fishing neck 2.

Salvage the chamber 21 in having seted up in the inside of neck 2, the cavity 31 with salvage the chamber 21 intercommunication is seted up in the inside of the plunger body 3, cavity 31 is including the last cavity 311 and the lower cavity 313 of intercommunication, salvage chamber 21 and last cavity 311 intercommunication, this scheme is through setting up cavity 31 in the plunger is inside, reduce plunger weight, and cavity 31 communicates from top to bottom, reduce the pressure of liquid in the oil pipe to the plunger, improve the falling speed of plunger in the oil pipe, make the plunger close the well in the oil well during, the plunger can fall to the card fixing device position fast.

A venturi chamber 312 for generating a venturi effect is arranged between the upper chamber 311 and the lower chamber 313; the cross-sectional diameter of the venturi chamber 312 is smaller than the cross-sectional diameters of the upper chamber 311 and the lower chamber 313, the cross-sectional shapes of the fishing cavity 21, the upper chamber 311, the venturi chamber 312 and the lower chamber 313 are all circular, and the circular cross-sectional diameter of the venturi chamber 312 is small, so that the gas flowing space in the venturi chamber 312 is reduced, the speed of the gas passing through the venturi chamber 312 is increased, the venturi effect is formed, the liquid density on the upper portion of the plunger is reduced, the pressure of the upper chamber 311 is reduced and is lower than that of the lower chamber 313, the plunger is easier to rise, and meanwhile, when the gas flow speed passing through the venturi chamber 312 exceeds the sound speed, a vacuum area is formed, a gas seal is formed, the liquid slippage on the upper portion of the plunger is reduced, and the liquid lifting efficiency of the plunger is improved.

When the diameter of the circular cross section of the venturi chamber 312 is larger, the falling speed of the plunger in the oil pipe is higher, and when the diameter of the circular cross section of the venturi chamber 312 is smaller, the gas flow rate increase multiple is higher, and the gas tightness is better.

As the further scheme of this embodiment plunger body 3, seted up on the outer wall of the plunger body 3 and made the even a plurality of layers of recess 32 of the outside gas flow velocity of plunger body, the degree of depth that is located a plurality of layers of recess 32 of the outer wall of the plunger body 3 is followed the inside neck 2 directions of salvaging of the bottom of the plunger body 3 and is progressively reduced in proper order, recess lateral wall 321 on one side of recess 32 is circular-arc, recess 32 makes the gas flow velocity distribution who passes through even on the outer wall of the plunger body 3, make the plunger body at the ascending in-process more steady.

Referring to fig. 3, the depth of the groove 32 is gradually reduced from the bottom end of the plunger body 3 to the inner fishing neck 2 direction, the groove 32 with the gradually reduced depth can compress gas step by step, and the compressed gas is combined with high-speed turbulent gas ejected by the ejection holes 33 to form gas seal, so that the gas seal performance of the plunger body is further improved, the liquid carrying efficiency of the plunger body is improved, meanwhile, the contact between the plunger body and an oil pipe is reduced, the abrasion is reduced, the service life of the plunger is prolonged, the number of the ejection holes 33 preferred in the embodiment is 8, 12 ejection holes 33 are divided into three layers on average, 4 ejection holes 33 are arranged on each layer, 4 ejection holes 22 are all located at the tangential position of the cavity 31, the ejection holes 33 on the first layer are evenly located in the groove 21 on the plunger body 2 where the upper cavity 31 is located, the remaining two layers of injection holes 33 are uniformly located in the upper recess 21 of the plunger body 2 where the lower chamber 32 is located.

As the further scheme of this embodiment salvage chamber 21, the entrance of salvage chamber 21 is provided with draw-in groove 22, when the plunger can't rise to the well head, when needing to carry out the steel wire operation and running into fishing tool and salvage the plunger, draw-in groove 22 can block fishing tool, the later stage of being convenient for is salvaged.

The working principle of the venturi jet type plunger tool of the embodiment is as follows:

the utility model discloses in practical application, when the oil well is driven, open pneumatic film valve or motorised valve, gush high-velocity air in the oil well pipeline, high-velocity air pushes away the plunger and rises, and high-velocity air gets into behind the cavity 31, from jet orifice 33 blowout, and the high-velocity turbulent gas of blowout makes the gas velocity of flow increase to it is rotatory between two parties in the oil well pipeline to drive the plunger body, and further improves the speed that the plunger body rises.

Be provided with recess 32 on the plunger body 3 outer wall, recess 32 makes the outside gas flow velocity of plunger body more even, it is more steady to make the plunger body rise, and the degree of depth of recess 32 is inwards salvaged the neck 2 directions from the bottom of the plunger body 3 and is progressively decreased in proper order, progressively decreased recess 32 compresses the gas on the plunger body 3 outer wall step by step in proper order, and gas after the compression and the gaseous inter combination of the high-speed torrent of jet orifice 33 blowout, further improve the gas tightness of plunger body, further improve taking liquid efficiency of plunger body.

When high-speed air current passes through venturi chamber 312, the space that the interior gas of venturi chamber 312 flowed diminishes, and then gas increases through venturi chamber 312 back speed, thereby form the venturi effect, reduce plunger upper portion liquid density, make upper chamber 311 pressure reduce, and be less than the pressure of lower chamber 313, make the plunger rise more easily, when the gas velocity of flow through venturi chamber 312 exceeded the sound velocity simultaneously, can form the vacuum zone, form gas seal, reduce plunger upper portion liquid slippage, improve the plunger and lift liquid efficiency.

When the well is closed, the cavity 31 is arranged in the plunger, so that the weight of the plunger is reduced, the cavity 31 is communicated up and down, the pressure of liquid in the oil pipe on the plunger can be reduced, the descending speed of the plunger in the oil pipe is increased, and the plunger can quickly fall to the position of the locking device during the well closing of the oil well.

While the present invention has been described in detail with reference to the embodiments, the scope of the present invention should not be limited to the embodiments. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.

Claims (7)

1. A venturi-jet type plunger tool characterized by: comprises a plunger body (1);

the plunger body (1) comprises an inner fishing neck (2) and a plunger body (3) connected with the inner fishing neck (2);

a salvaging cavity (21) is arranged inside the inner salvaging neck (2); a cavity (31) communicated with the fishing cavity (21) is formed in the plunger body (3); the cavity (31) comprises an upper cavity (311) and a lower cavity (313) which are communicated, and the fishing cavity (21) is communicated with the upper cavity (311);

a Venturi chamber (312) for generating Venturi effect is arranged between the upper chamber (311) and the lower chamber (313); the section diameter of the Venturi chamber (312) is smaller than the section diameters of the upper chamber (311) and the lower chamber (313).

2. The venturi jet-type plunger tool of claim 1, wherein: the outer wall of the plunger body (3) is provided with a plurality of layers of grooves (32).

3. The venturi jet-type plunger tool of claim 2, wherein: the depths of the plurality of layers of grooves (32) on the outer wall of the plunger body (3) are gradually reduced from bottom to top.

4. The venturi jet-type plunger tool of claim 2, wherein: the groove side wall (321) on one side of the groove (32) is arc-shaped.

5. The venturi jet-type plunger tool of claim 2, wherein: the groove (32) positioned in the lower cavity (313) is provided with a plurality of injection holes (33).

6. The venturi jet-type plunger tool of claim 5, wherein: the injection hole (33) is provided in a tangential direction of a circumferential direction of the lower chamber (313).

7. The venturi jet-type plunger tool of claim 1, wherein: and a clamping groove (22) is arranged at the inlet of the fishing cavity (21).

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