CN220815612U - Automatic filling device for wellhead foam discharging agent - Google Patents

Abstract

The utility model provides an automatic filling device for a wellhead foam discharging agent, which belongs to the technical field of petroleum and natural gas exploitation, and comprises an adding cylinder for adding the foam discharging agent into accumulated liquid in a well, wherein a plugging piece for plugging an opening is arranged in the adding cylinder through a first elastic piece, the adding cylinder is connected with a storage cylinder for storing the foam discharging agent, a connecting piece is arranged in the adding cylinder, a connecting channel is arranged in the connecting piece, a sliding piece is assembled on the connecting piece in a guiding sliding way along the axial direction of the adding cylinder, a sliding channel is arranged in the sliding piece, a second elastic piece is arranged between the sliding piece and the adding cylinder, so that a supplementing station for enabling the connecting channel to be communicated with the sliding channel to enable the foam discharging agent in the storage cylinder to be supplemented into the adding cylinder is arranged in the sliding stroke of the sliding piece, and a plugging station for enabling the connecting channel to be staggered with the sliding channel is also arranged. The utility model realizes automatic filling of the foam discharging agent and solves the problem that the existing device cannot be reused when filling the foam discharging agent.

Description

Automatic filling device for wellhead foam discharging agent

Technical Field

The utility model relates to an automatic filling device for a wellhead foam discharging agent, and belongs to the technical field of petroleum and natural gas exploitation.

Background

In the production process of the gas well, liquid products can be carried out of the shaft by self energy at the initial stage of production of the gas well, and along with the production of the gas well, the energy of the gas well is reduced, so that the liquid products can be formed in the shaft to influence the production of the gas well, and the foam drainage gas production process is adopted, namely, foaming agent is filled into the gas well, so that the density of the liquid products in the shaft is reduced, the critical liquid carrying amount of the gas well is reduced, the liquid products are carried out of the shaft, and the purpose of maintaining the normal production of the gas well is achieved.

Currently, in the chinese patent of the invention with the publication number CN103352679B, a device and a method for automatically filling a foam discharging agent in a well are disclosed, wherein in the automatic filling process of the device for automatically filling the foam discharging agent in the well, a setting pin is cut off first to enable a setting mechanism to seal an oil jacket annulus of a gas well, then after the foam discharging agent is added into the oil jacket annulus, the foam discharging agent enters the automatic filling mechanism through a foam discharging agent filling hole; cutting off the pin of the lining tube, enabling the inner tube of the device to be communicated with an automatic filling mechanism, and controlling the opening and closing of the ball valve and the valve seat by utilizing the change of the pressure in the shaft caused by accumulated liquid in the shaft of the gas well so as to realize automatic filling of the foam discharging agent; after the filling of the foam discharging agent is completed, an oil pipe column is required to be lifted, and the deblocking pin is sheared to complete resetting deblocking.

In the process of automatically filling the foam discharging agent, the structure of the device is required to be changed under different working conditions of setting, filling the foam discharging agent and deblocking, the structure of the setting pin, the lining pipe pin and the deblocking pin is adopted, the structure is complex, and the setting pin, the lining pipe pin and the deblocking pin are sheared after being used, so that the device cannot be reused, and the use cost is high; in addition, firstly, the foam discharging agent is added into the oil sleeve annular space when the foam discharging agent is filled, and because the oil sleeve annular space is large, a large amount of foam discharging agent needs to be filled into the oil sleeve annular space, so that the foam discharging agent can enter an automatic filling mechanism through a foam discharging agent injection outer hole on the device, and after the device is unsealed, the residual foam discharging agent in the oil sleeve annular space cannot be recovered, and waste of the foam discharging agent is caused.

Disclosure of utility model

The utility model aims to provide an automatic filling device for a wellhead foam discharging agent, which aims to solve the problems that the existing device cannot be reused and the foam discharging agent is wasted when the foam discharging agent is filled.

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

The utility model provides an automatic filling device of agent is arranged to well head bubble, is equipped with the shutoff piece that is used for shutoff open-ended including being used for adding the interpolation section of thick bamboo that the agent was arranged to bubble in the hydrops in the well to adding the axial one end of section of thick bamboo, other one end be the blind end, is equipped with in the interpolation section of thick bamboo through first elastic component, its characterized in that: a storage cylinder for storing foam discharging agent is arranged on one side of the closed end of the adding cylinder, a connecting piece connected with the closed end is arranged in the adding cylinder, a connecting channel is arranged in the connecting piece, the connecting channel is provided with a first communication port communicated with the storage cylinder, and a second communication port positioned in the adding cylinder; the connecting piece is axially guided and slidably provided with a sliding piece along the adding cylinder, a sliding channel is arranged in the sliding piece, the sliding channel is provided with a third communication port communicated with the adding cylinder, and the sliding channel is also provided with a fourth communication port facing the connecting piece; the second elastic piece is arranged between the sliding piece and the adding cylinder, so that a supplementing station for supplementing the foam discharging agent in the storage cylinder into the adding cylinder is arranged in the sliding stroke of the sliding piece, and a blocking station for staggering the fourth communication port and the second communication port and blocking the second communication port is arranged.

The beneficial effects of the technical scheme are that: according to the automatic filling device for the wellhead foam discharging agent, the prior art is improved, and in the automatic filling device for the wellhead foam discharging agent, the foam discharging agent is filled into the filling cylinder from the storage cylinder through the supplementing station corresponding to the fourth communication port of the sliding part and the second communication port on the communication part; when the pressure of the hydraulic fluid in the well is larger than that of the first elastic member, the hydraulic fluid in the well pushes the blocking member to open the opening of the adding cylinder, and then pushes the sliding member to move away from the opening end, so that the fourth communication port and the second communication port are staggered and the second communication port is blocked, the injection of the foam discharging agent from the storage cylinder to the adding cylinder is stopped, the hydraulic fluid in the well contacts the foam discharging agent in the adding cylinder, the critical liquid carrying amount of the gas well is reduced, the hydraulic fluid is carried out of the shaft, and the purpose of maintaining normal production of the gas well is achieved; after the in-well dropsy is reduced, the pressure of the first elastic piece pushes the blocking piece to block the opening, and meanwhile, under the action of the second elastic piece between the sliding piece and the adding cylinder, the fourth communication port of the sliding piece is correspondingly communicated with the second communication port on the communication piece, so that automatic replenishment of the foam discharging agent from the storage cylinder to the adding cylinder is completed. Compared with the prior art that the foam discharging agent is added into the oil sleeve annulus, and the setting, foam discharging agent filling and deblocking mechanism is arranged on the device, the device has simple structure; and in the prior art, after the setting pin, the lining pipe pin and the deblocking pin are used, the device cannot be reused because the setting pin, the lining pipe pin and the deblocking pin are sheared, and after the device is filled once, the foam discharging agent can be automatically added into the adding cylinder through the supplementing station, so that the reuse of the device is realized.

Further, a pushing plate is arranged in the storage cylinder, a third elastic piece is arranged between the pushing plate and the storage cylinder, and the third elastic piece is used for applying elastic acting force towards the direction of the first communication opening to the pushing plate.

The beneficial effects of the technical scheme are that: when the device is positioned at a supplementing station corresponding to the fourth communication port of the sliding piece and the second communication port on the communication piece, the foam discharging agent is pressed into the adding cylinder from the storage cylinder by the elastic acting force applied to the pushing plate by the third elastic piece towards the direction of the first communication port.

Further, the third elastic piece is a pressure spring and is arranged on one side of the push plate far away from the first communication port.

The beneficial effects of the technical scheme are that: the pressure spring has a simple structure and generates thrust towards the first communication port to the push plate.

Further, the connecting channel comprises a first channel extending along the axial direction of the adding cylinder and a second channel which is positioned at the end part of the first channel and is vertically communicated with the first channel, one end of the first channel forms the first communication port, and one end of the second channel forms the second communication port; the sliding channel is L-shaped and comprises a third channel extending along the axial direction of the adding cylinder and a fourth channel vertically communicated with the third channel, one end of the third channel forms a third communication port, and one end of the fourth channel forms a fourth communication port.

The beneficial effects of the technical scheme are that: the connecting channel and the sliding channel adopt mutually perpendicular sectional structures, and the connecting channel and the sliding channel are convenient to process on the premise that the fourth communication port of the sliding piece and the second communication port on the communication piece can mutually correspond.

Further, at least two second channels are provided, and at least two corresponding sliding channels are also provided.

The beneficial effects of the technical scheme are that: the multi-channel structure can increase the filling speed of the foam discharging agent when the foam discharging agent is filled into the adding cylinder from the storage cylinder.

Further, the sliding piece is in a step shape and comprises a large-diameter section and a small-diameter section connected with the large-diameter section, the large-diameter section and the small-diameter section are formed with step surfaces, the sliding channel is arranged in the large-diameter section, and the small-diameter section is used for sealing the second communication port when the sliding piece is in a sealing station.

The beneficial effects of the technical scheme are that: the second communication port is blocked by adopting the small-diameter section, so that the weight of the device can be reduced, the space of the adding cylinder for containing the foam discharging agent is increased, and the adding amount of the foam discharging agent in the adding cylinder is increased.

Further, the second elastic piece is a tension spring with one end connected with the adding cylinder and the other end connected with the step surface.

The beneficial effects of the technical scheme are that: one end of the second elastic piece is connected with the adding cylinder, so that the setting of the second elastic piece is facilitated, and the step surface structure increases the stability of connection of the tension spring.

Further, the connecting piece includes the connecting rod and connects the connecting plate in connecting rod one end, and the other end of connecting rod is connected with adding a section of thick bamboo blind end, the connecting channel sets up on the connecting rod, first elastic component is connected on the connecting plate.

The beneficial effects of the technical scheme are that: the connecting rod occupies small space with the structure of connecting plate, has guaranteed the stability that first elastic component is connected simultaneously.

Further, the first elastic piece is a telescopic corrugated pipe, and a first valve for inflating the telescopic corrugated pipe is arranged on the plugging piece.

The beneficial effects of the technical scheme are that: filling nitrogen into the telescopic corrugated pipe through the first valve, and extruding the plugging piece by utilizing the air pressure in the telescopic corrugated pipe to achieve the purpose of plugging the opening of the adding cylinder; according to the technical scheme, the strength of the first elastic piece is guaranteed, and meanwhile, the elastic force requirement of the device is met.

Further, a second valve for adding the foam discharging agent into the storage cylinder is arranged on the cylinder wall of the storage cylinder.

The beneficial effects of the technical scheme are that: when the foam discharging agent storage volume in the storage cylinder is insufficient, the foam discharging agent is added into the storage cylinder through the second valve, so that the device can be reused.

Drawings

FIG. 1 is a schematic view of the structure of example 1 of the automatic wellhead foam-removing agent filling device (with the slider in the plugging station) according to the present utility model;

Fig. 2 is a schematic structural view of an embodiment 1 of an automatic wellhead foam-removing agent filling device (a slider is at a replenishment station) according to the present utility model.

In the figure: 1. an addition cylinder; 101. an opening; 2. a storage cylinder; 3. a communication rod; 301. a communication passage; 302. a first communication port; 303. a second communication port; 4. a connecting plate; 5. a bellows; 6. a blocking member; 7. a first valve; 8. an end cap; 9. a slider; 901. a sliding channel; 902. a third communication port; 903. a fourth communication port; 10. a second elastic member; 11. a second valve; 12. a push plate; and 13 a third elastic member.

Detailed Description

The features and capabilities of the present utility model are described in further detail below in connection with the examples.

The specific embodiment 1 of the automatic filling device for the wellhead foam discharging agent provided by the utility model comprises the following components:

The main conception of the embodiment is that the storage cylinder is arranged on the device, the foam discharging agent is supplemented to the adding cylinder through a supplementing station corresponding to a fourth communication port of the sliding part and a second communication port of the communication part, the opening and the closing of the plugging part and the opening are controlled through the pressure difference between the hydraulic pressure and the inflation pressure in the telescopic corrugated pipe, and the fourth communication port and the second communication port are staggered to stop supplementing the foam discharging agent in the adding cylinder, so that the automatic filling of the foam discharging agent is realized; after the filling of the foam discharging agent is completed, the foam discharging agent is replenished into the adding cylinder again through the replenishing station, and when the foam discharging agent storage capacity in the storage cylinder is insufficient, the foam discharging agent is added into the storage cylinder through the second valve, so that the device can be reused.

Specifically as shown in fig. 1-2, an automatic filling device for wellhead foam discharging agent comprises an adding cylinder 1 for adding foam discharging agent into accumulated liquid in a well, wherein the adding cylinder is of a hollow columnar structure, one axial end of the adding cylinder is provided with an opening 101, the other end of the adding cylinder is provided with a closed end, the closed end of the adding cylinder 1 is provided with a connecting piece, the connecting piece comprises a connecting rod 3 and a connecting plate 4, one end of the connecting rod 3 is fixedly connected with the middle part of the closed end of the adding chamber 1, the other end of the connecting rod is fixedly provided with the connecting plate 4, the connecting plate 4 is connected with a first elastic piece, in the embodiment, the first elastic piece is a telescopic bellows 5, the telescopic bellows 5 is connected with a plugging piece 6, a first valve 7 for inflating the telescopic bellows 5 is arranged on the plugging piece 6, an end cap 8 for protecting the first valve 7 is arranged on the plugging piece 6, the plugging piece 6 is matched with the opening 101 of the adding chamber 1, and the opening 101 can be opened or closed.

The blind end of adding section of thick bamboo 1 is provided with storage section of thick bamboo 2, is equipped with connecting channel 301 in the connecting rod 3, and connecting channel 301 is T shape, and connecting channel 301 intercommunication apotheca 2 and connecting rod 3's lateral wall, it includes along adding the first passageway of section of thick bamboo axial extension and the second passageway that is located first passageway tip and communicates perpendicularly with first passageway, and the one end of first passageway forms first communication port 302, and first communication port 302 intercommunication apotheca, second passageway has two, and the one end of second passageway forms second communication port 303, and second communication port 303 is located adding the section of thick bamboo. The connecting piece 3 is provided with a sliding piece 9 along the axial guiding sliding of the adding cylinder 1, a sliding channel 901 is arranged in the sliding piece 9, the sliding channel 901 is two symmetrically distributed L-shaped channels, the sliding channel comprises a third channel extending along the axial direction of the adding cylinder 1 and a fourth channel vertically communicated with the third channel, one end of the third channel is provided with a third communication port 902, the third communication port 902 is communicated with the adding cylinder 1, one end of the fourth channel is provided with a fourth communication port 903, and the fourth communication port 903 faces the connecting rod 3.

A second elastic piece 10 is arranged between the sliding piece 9 and the adding cylinder 1, in the embodiment, the second elastic piece is a tension spring, and under the action of the second elastic piece 10, the sliding piece 9 can axially move along the communication rod 3, so that a supplementing station and a plugging station are arranged in the sliding stroke of the sliding piece 9; when the sliding part 9 is in the supplementing station, the fourth communication port 903 is communicated with the second communication port 303, the foam discharging agent in the storage cylinder 2 is supplemented into the adding cylinder 1, and when the sliding part 9 is in the plugging station, the fourth communication port 903 is staggered with the second communication port 303 and plugs the second communication port 303, and the foam discharging agent in the storage cylinder 2 cannot be injected into the adding cylinder 1.

In this embodiment, slider 9 is the ladder-shaped, including big footpath section and the path section that links to each other with big footpath section, big footpath section and path section are formed with the step face, and sliding channel 901 sets up in big footpath section, and path section is used for shutoff second intercommunication mouth 303 when slider 9 is in shutoff station, simultaneously, second elastic component 10 one end is connected with adding the section of thick bamboo, and another one end is connected with the step face, and step face structure has increased the stability that second elastic component 10 is connected.

As shown in fig. 2, a second valve 11 for adding a foam discharging agent into the storage barrel 1 is arranged on the barrel wall of the storage barrel 2, when in use, the foam discharging agent is added into the storage chamber 2 through the second valve 11, then nitrogen is filled into the telescopic corrugated pipe 5 through the first valve 7, and the plug 6 is extruded by utilizing the air pressure in the telescopic corrugated pipe 5 to plug the opening 101; at this time, the second elastic member 10 pulls the slider 9 so that the fourth communication port 903 of the slider 9 corresponds to the second communication port 303 of the communication rod 3, and the foam discharging agent is replenished from the reservoir cartridge 2 into the adder cartridge 1.

As shown in fig. 1, when the pressure of the fluid in the well is greater than the pressure in the bellows 5, the fluid in the well pushes the blocking member 6 to open the opening 101, and then pushes the sliding member 9 to move away from the end of the opening 101, so that the fourth communication port 903 and the second communication port 303 are staggered and the second communication port 303 is blocked, the foam discharging agent is cut off to supplement the additive cylinder 1 from the storage cylinder 2, the fluid in the well contacts the foam discharging agent in the additive cylinder 1, the critical fluid carrying amount of the gas well is reduced, the fluid is carried out of the shaft, and the purpose of maintaining normal production of the gas well is achieved.

As shown in fig. 2, after the well dropsy is reduced, the pressure of the bellows 5 pushes the blocking member 6 to block the opening 101, and simultaneously, under the pulling action of the second elastic member 10, the fourth communication port 903 and the second communication port 303 are correspondingly communicated, so that the foam discharging agent in the storage cylinder 2 is replenished into the adding cylinder 1, and the device is reused.

In addition, the push plate 12 is slidably connected in the storage barrel 2, and a third elastic member 13 is provided between the push plate 12 and one end of the storage barrel 2 away from the first communication port 302, in this embodiment, the third elastic member is a compression spring, under the elastic action of the third elastic member 13, the push plate 12 pushes the foam discharging agent in the storage chamber 2 to be injected into the adding chamber 1 through the connecting rod channel 301 on the communication rod 3 and the sliding channel 901 on the sliding member 9, so as to complete automatic replenishment of the foam discharging agent in the adding chamber 1.

When the foam discharging agent in the storage cylinder 2 is insufficient, the foam discharging agent is added into the storage cylinder 2 through the second valve 11, so that the device can be reused.

The specific embodiment 2 of the automatic filling device for the wellhead foam discharging agent provided by the utility model comprises the following components: the mode of adding the foam discharging agent in the storage chamber of this embodiment is different from that of embodiment 1 in that the second valve is not provided, at this time, the end of the storage tube far away from the adding tube is opened and tapped, and is sealed by the end cap provided with the thread, and when the foam discharging agent needs to be added, the end cap is opened for adding.

The specific embodiment 3 of the automatic filling device for wellhead foam discharging agent provided by the utility model comprises the following components: the present embodiment provides a different first elastic member structure, which is different from embodiment 1 in that the first elastic member is a spring, and the pressure is provided to the sealing member by the spring.

The specific embodiment 4 of the automatic filling device for wellhead foam discharging agent provided by the utility model comprises the following components: the difference between the structure of the connecting piece provided in this embodiment and the structure of the connecting piece in embodiment 1 is that the connecting piece is in a cuboid structure and no connecting plate is provided, at this time, the volume of the connecting piece is larger, and the foam discharging agent capacity of the adding cylinder is reduced.

The specific embodiment 5 of the automatic filling device for wellhead foam discharging agent provided by the utility model comprises the following components: the second elastic member provided in this embodiment is different from embodiment 1 in the manner of applying force, in that the second connecting member is a compression spring, which is disposed between the closed end of the adding cylinder and the sliding member.

The specific embodiment 6 of the automatic filling device for the wellhead foam discharging agent provided by the utility model comprises the following components: the difference between the structure of the sliding member provided in this embodiment and that of embodiment 1 is that the sliding member is cylindrical, and no step surface is provided, and this arrangement method may reduce the stability of the spring connection.

The specific embodiment 7 of the automatic filling device for wellhead foam discharging agent provided by the utility model comprises: the number of the second channels and the number of the sliding channels in this embodiment are different from those in embodiment 1 in that the number of the second channels and the number of the sliding channels are four and correspond to each other one by one, and in other embodiments, the number of the second channels and the number of the sliding channels may be one or three.

The specific embodiment 8 of the automatic filling device for the wellhead foam discharging agent provided by the utility model comprises the following components: the structure of the connecting channel is different from that of the sliding channel in this embodiment, and the difference from embodiment 1 is that the connecting channel is a through hole that obliquely penetrates the side wall and the end face of the connecting rod, and at this time, the sliding channel is a through hole that obliquely penetrates the sliding member and corresponds to the connecting channel.

The specific embodiment 9 of the automatic filling device for wellhead foam discharging agent provided by the utility model comprises the following components: the third elastic member in this embodiment is different from embodiment 1 in the manner of applying force, in that the third elastic member is a tension spring, which is disposed on a side of the push plate close to the first communication port.

The specific embodiment 10 of the automatic filling device for wellhead foam discharging agent provided by the utility model comprises the following components: in this embodiment, the force application mode when the foam discharging agent is injected into the adding cylinder is different from that of embodiment 1 in that the pushing plate and the third elastic member are not provided, and at this time, the adding cylinder faces downwards when the device works, and the foam discharging agent in the storage cylinder is injected into the adding cylinder by gravity.

The above description is only a preferred embodiment of the present utility model, and the patent protection scope of the present utility model is defined by the claims, and all equivalent structural changes made by the specification and the drawings of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The utility model provides an automatic filling device of agent is arranged to well head bubble, is equipped with the shutoff piece that is used for shutoff open-ended including being used for adding the interpolation section of thick bamboo that the agent was arranged to bubble in the hydrops in the well to adding the axial one end of section of thick bamboo, other one end be the blind end, is equipped with in the interpolation section of thick bamboo through first elastic component, its characterized in that: a storage cylinder for storing foam discharging agent is arranged on one side of the closed end of the adding cylinder, a connecting piece connected with the closed end is arranged in the adding cylinder, a connecting channel is arranged in the connecting piece, the connecting channel is provided with a first communication port communicated with the storage cylinder, and a second communication port positioned in the adding cylinder; the connecting piece is axially guided and slidably provided with a sliding piece along the adding cylinder, a sliding channel is arranged in the sliding piece, the sliding channel is provided with a third communication port communicated with the adding cylinder, and the sliding channel is also provided with a fourth communication port facing the connecting piece; the second elastic piece is arranged between the sliding piece and the adding cylinder, so that a supplementing station for supplementing the foam discharging agent in the storage cylinder into the adding cylinder is arranged in the sliding stroke of the sliding piece, and a blocking station for staggering the fourth communication port and the second communication port and blocking the second communication port is arranged.

2. The automatic wellhead foam-removing agent filling device according to claim 1, wherein a pushing plate is arranged in the storage cylinder, a third elastic member is arranged between the pushing plate and the storage cylinder, and the third elastic member is used for applying elastic acting force to the pushing plate towards the direction of the first communication port.

3. The automatic wellhead foam-removing agent filling device according to claim 2, wherein the third elastic member is a compression spring and is disposed on a side of the push plate away from the first communication port.

4. A wellhead foam-removing agent automatic filling device according to any one of claims 1 to 3, characterized in that said connecting channel comprises a first channel extending axially along the filling cylinder and a second channel located at the end of the first channel and communicating vertically with the first channel, one end of the first channel forming said first communication port, one end of the second channel forming said second communication port; the sliding channel is L-shaped and comprises a third channel extending along the axial direction of the adding cylinder and a fourth channel vertically communicated with the third channel, one end of the third channel forms a third communication port, and one end of the fourth channel forms a fourth communication port.

5. The automatic wellhead foam-removing agent filling device according to claim 4, wherein at least two second channels are provided, and at least two corresponding sliding channels are also provided.

6. A wellhead foam-removing agent automatic filling device according to any one of claims 1 to 3, characterized in that the sliding member is stepped and comprises a large-diameter section and a small-diameter section connected with the large-diameter section, a step surface is formed between the large-diameter section and the small-diameter section, the sliding channel is arranged in the large-diameter section, and the small-diameter section is used for sealing the second communication port when the sliding member is in a sealing station.

7. The automatic wellhead foam-removing agent filling device according to claim 6, wherein the second elastic member is a tension spring, one end of which is connected with the filling cylinder, and the other end of which is connected with the step surface.

8. A wellhead foam-removing agent automatic filling device according to any one of claims 1 to 3, characterized in that the connecting piece comprises a connecting rod and a connecting plate connected to one end of the connecting rod, the other end of the connecting rod is connected to the closed end of the adding cylinder, the connecting channel is arranged on the connecting rod, and the first elastic piece is connected to the connecting plate.

9. A wellhead foam-removing agent automatic filling device according to any one of claims 1 to 3, characterized in that the first elastic member is a bellows, and the plugging member is provided with a first valve for inflating the bellows.

10. A wellhead foam-removing agent automatic filling device according to any of claims 1 to 3, characterized in that the wall of the storage cylinder is provided with a second valve for adding foam-removing agent into the storage cylinder.